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-rw-r--r--drivers/base/bus.c15
-rw-r--r--drivers/base/component.c2
-rw-r--r--drivers/base/dma-coherent.c28
-rw-r--r--drivers/base/firmware_class.c87
-rw-r--r--drivers/base/memory.c34
-rw-r--r--drivers/base/power/domain.c60
-rw-r--r--drivers/base/power/domain_governor.c64
-rw-r--r--drivers/base/power/opp/core.c1079
-rw-r--r--drivers/base/power/opp/cpu.c22
-rw-r--r--drivers/base/power/opp/debugfs.c85
-rw-r--r--drivers/base/power/opp/opp.h74
-rw-r--r--drivers/base/power/trace.c4
-rw-r--r--drivers/base/property.c37
-rw-r--r--drivers/base/regmap/internal.h16
-rw-r--r--drivers/base/regmap/regcache-flat.c20
-rw-r--r--drivers/base/regmap/regcache.c45
-rw-r--r--drivers/base/regmap/regmap-irq.c104
-rw-r--r--drivers/base/regmap/regmap-mmio.c259
-rw-r--r--drivers/base/regmap/regmap.c241
19 files changed, 1411 insertions, 865 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 500592486e88..6470eb8088f4 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -149,8 +149,7 @@ EXPORT_SYMBOL_GPL(bus_remove_file);
static void bus_release(struct kobject *kobj)
{
- struct subsys_private *priv =
- container_of(kobj, typeof(*priv), subsys.kobj);
+ struct subsys_private *priv = to_subsys_private(kobj);
struct bus_type *bus = priv->bus;
kfree(priv);
@@ -1019,13 +1018,11 @@ static void device_insertion_sort_klist(struct device *a, struct list_head *list
int (*compare)(const struct device *a,
const struct device *b))
{
- struct list_head *pos;
struct klist_node *n;
struct device_private *dev_prv;
struct device *b;
- list_for_each(pos, list) {
- n = container_of(pos, struct klist_node, n_node);
+ list_for_each_entry(n, list, n_node) {
dev_prv = to_device_private_bus(n);
b = dev_prv->device;
if (compare(a, b) <= 0) {
@@ -1042,8 +1039,7 @@ void bus_sort_breadthfirst(struct bus_type *bus,
const struct device *b))
{
LIST_HEAD(sorted_devices);
- struct list_head *pos, *tmp;
- struct klist_node *n;
+ struct klist_node *n, *tmp;
struct device_private *dev_prv;
struct device *dev;
struct klist *device_klist;
@@ -1051,8 +1047,7 @@ void bus_sort_breadthfirst(struct bus_type *bus,
device_klist = bus_get_device_klist(bus);
spin_lock(&device_klist->k_lock);
- list_for_each_safe(pos, tmp, &device_klist->k_list) {
- n = container_of(pos, struct klist_node, n_node);
+ list_for_each_entry_safe(n, tmp, &device_klist->k_list, n_node) {
dev_prv = to_device_private_bus(n);
dev = dev_prv->device;
device_insertion_sort_klist(dev, &sorted_devices, compare);
@@ -1107,7 +1102,7 @@ struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter)
knode = klist_next(&iter->ki);
if (!knode)
return NULL;
- dev = container_of(knode, struct device_private, knode_bus)->device;
+ dev = to_device_private_bus(knode)->device;
if (!iter->type || iter->type == dev->type)
return dev;
}
diff --git a/drivers/base/component.c b/drivers/base/component.c
index 04a1582e80bb..89b032f2ffd2 100644
--- a/drivers/base/component.c
+++ b/drivers/base/component.c
@@ -267,7 +267,7 @@ void component_match_add_release(struct device *master,
}
if (match->num == match->alloc) {
- size_t new_size = match ? match->alloc + 16 : 15;
+ size_t new_size = match->alloc + 16;
int ret;
ret = component_match_realloc(master, match, new_size);
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index 55b83983a9c0..87b808374888 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -17,9 +17,9 @@ struct dma_coherent_mem {
spinlock_t spinlock;
};
-static int dma_init_coherent_memory(phys_addr_t phys_addr, dma_addr_t device_addr,
- size_t size, int flags,
- struct dma_coherent_mem **mem)
+static bool dma_init_coherent_memory(
+ phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, int flags,
+ struct dma_coherent_mem **mem)
{
struct dma_coherent_mem *dma_mem = NULL;
void __iomem *mem_base = NULL;
@@ -50,17 +50,13 @@ static int dma_init_coherent_memory(phys_addr_t phys_addr, dma_addr_t device_add
spin_lock_init(&dma_mem->spinlock);
*mem = dma_mem;
-
- if (flags & DMA_MEMORY_MAP)
- return DMA_MEMORY_MAP;
-
- return DMA_MEMORY_IO;
+ return true;
out:
kfree(dma_mem);
if (mem_base)
iounmap(mem_base);
- return 0;
+ return false;
}
static void dma_release_coherent_memory(struct dma_coherent_mem *mem)
@@ -88,15 +84,13 @@ int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
dma_addr_t device_addr, size_t size, int flags)
{
struct dma_coherent_mem *mem;
- int ret;
- ret = dma_init_coherent_memory(phys_addr, device_addr, size, flags,
- &mem);
- if (ret == 0)
+ if (!dma_init_coherent_memory(phys_addr, device_addr, size, flags,
+ &mem))
return 0;
if (dma_assign_coherent_memory(dev, mem) == 0)
- return ret;
+ return flags & DMA_MEMORY_MAP ? DMA_MEMORY_MAP : DMA_MEMORY_IO;
dma_release_coherent_memory(mem);
return 0;
@@ -281,9 +275,9 @@ static int rmem_dma_device_init(struct reserved_mem *rmem, struct device *dev)
struct dma_coherent_mem *mem = rmem->priv;
if (!mem &&
- dma_init_coherent_memory(rmem->base, rmem->base, rmem->size,
- DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE,
- &mem) != DMA_MEMORY_MAP) {
+ !dma_init_coherent_memory(rmem->base, rmem->base, rmem->size,
+ DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE,
+ &mem)) {
pr_err("Reserved memory: failed to init DMA memory pool at %pa, size %ld MiB\n",
&rmem->base, (unsigned long)rmem->size / SZ_1M);
return -ENODEV;
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index b9250e564ebf..773fc3099769 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -23,6 +23,7 @@
#include <linux/sched.h>
#include <linux/file.h>
#include <linux/list.h>
+#include <linux/fs.h>
#include <linux/async.h>
#include <linux/pm.h>
#include <linux/suspend.h>
@@ -257,7 +258,7 @@ static void __fw_free_buf(struct kref *ref)
vunmap(buf->data);
for (i = 0; i < buf->nr_pages; i++)
__free_page(buf->pages[i]);
- kfree(buf->pages);
+ vfree(buf->pages);
} else
#endif
vfree(buf->data);
@@ -291,40 +292,19 @@ static const char * const fw_path[] = {
module_param_string(path, fw_path_para, sizeof(fw_path_para), 0644);
MODULE_PARM_DESC(path, "customized firmware image search path with a higher priority than default path");
-static int fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
+static void fw_finish_direct_load(struct device *device,
+ struct firmware_buf *buf)
{
- int size;
- char *buf;
- int rc;
-
- if (!S_ISREG(file_inode(file)->i_mode))
- return -EINVAL;
- size = i_size_read(file_inode(file));
- if (size <= 0)
- return -EINVAL;
- buf = vmalloc(size);
- if (!buf)
- return -ENOMEM;
- rc = kernel_read(file, 0, buf, size);
- if (rc != size) {
- if (rc > 0)
- rc = -EIO;
- goto fail;
- }
- rc = security_kernel_fw_from_file(file, buf, size);
- if (rc)
- goto fail;
- fw_buf->data = buf;
- fw_buf->size = size;
- return 0;
-fail:
- vfree(buf);
- return rc;
+ mutex_lock(&fw_lock);
+ set_bit(FW_STATUS_DONE, &buf->status);
+ complete_all(&buf->completion);
+ mutex_unlock(&fw_lock);
}
static int fw_get_filesystem_firmware(struct device *device,
struct firmware_buf *buf)
{
+ loff_t size;
int i, len;
int rc = -ENOENT;
char *path;
@@ -334,8 +314,6 @@ static int fw_get_filesystem_firmware(struct device *device,
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
- struct file *file;
-
/* skip the unset customized path */
if (!fw_path[i][0])
continue;
@@ -347,28 +325,25 @@ static int fw_get_filesystem_firmware(struct device *device,
break;
}
- file = filp_open(path, O_RDONLY, 0);
- if (IS_ERR(file))
+ buf->size = 0;
+ rc = kernel_read_file_from_path(path, &buf->data, &size,
+ INT_MAX, READING_FIRMWARE);
+ if (rc) {
+ if (rc == -ENOENT)
+ dev_dbg(device, "loading %s failed with error %d\n",
+ path, rc);
+ else
+ dev_warn(device, "loading %s failed with error %d\n",
+ path, rc);
continue;
- rc = fw_read_file_contents(file, buf);
- fput(file);
- if (rc)
- dev_warn(device, "firmware, attempted to load %s, but failed with error %d\n",
- path, rc);
- else
- break;
+ }
+ dev_dbg(device, "direct-loading %s\n", buf->fw_id);
+ buf->size = size;
+ fw_finish_direct_load(device, buf);
+ break;
}
__putname(path);
- if (!rc) {
- dev_dbg(device, "firmware: direct-loading firmware %s\n",
- buf->fw_id);
- mutex_lock(&fw_lock);
- set_bit(FW_STATUS_DONE, &buf->status);
- complete_all(&buf->completion);
- mutex_unlock(&fw_lock);
- }
-
return rc;
}
@@ -660,7 +635,7 @@ static ssize_t firmware_loading_store(struct device *dev,
if (!test_bit(FW_STATUS_DONE, &fw_buf->status)) {
for (i = 0; i < fw_buf->nr_pages; i++)
__free_page(fw_buf->pages[i]);
- kfree(fw_buf->pages);
+ vfree(fw_buf->pages);
fw_buf->pages = NULL;
fw_buf->page_array_size = 0;
fw_buf->nr_pages = 0;
@@ -685,8 +660,9 @@ static ssize_t firmware_loading_store(struct device *dev,
dev_err(dev, "%s: map pages failed\n",
__func__);
else
- rc = security_kernel_fw_from_file(NULL,
- fw_buf->data, fw_buf->size);
+ rc = security_kernel_post_read_file(NULL,
+ fw_buf->data, fw_buf->size,
+ READING_FIRMWARE);
/*
* Same logic as fw_load_abort, only the DONE bit
@@ -770,8 +746,7 @@ static int fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
buf->page_array_size * 2);
struct page **new_pages;
- new_pages = kmalloc(new_array_size * sizeof(void *),
- GFP_KERNEL);
+ new_pages = vmalloc(new_array_size * sizeof(void *));
if (!new_pages) {
fw_load_abort(fw_priv);
return -ENOMEM;
@@ -780,7 +755,7 @@ static int fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
buf->page_array_size * sizeof(void *));
memset(&new_pages[buf->page_array_size], 0, sizeof(void *) *
(new_array_size - buf->page_array_size));
- kfree(buf->pages);
+ vfree(buf->pages);
buf->pages = new_pages;
buf->page_array_size = new_array_size;
}
@@ -1051,7 +1026,7 @@ _request_firmware_prepare(struct firmware **firmware_p, const char *name,
}
if (fw_get_builtin_firmware(firmware, name)) {
- dev_dbg(device, "firmware: using built-in firmware %s\n", name);
+ dev_dbg(device, "using built-in %s\n", name);
return 0; /* assigned */
}
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 213456c2b123..f46dba8b7092 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -251,7 +251,7 @@ memory_block_action(unsigned long phys_index, unsigned long action, int online_t
return ret;
}
-static int memory_block_change_state(struct memory_block *mem,
+int memory_block_change_state(struct memory_block *mem,
unsigned long to_state, unsigned long from_state_req)
{
int ret = 0;
@@ -439,6 +439,37 @@ print_block_size(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR(block_size_bytes, 0444, print_block_size, NULL);
/*
+ * Memory auto online policy.
+ */
+
+static ssize_t
+show_auto_online_blocks(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ if (memhp_auto_online)
+ return sprintf(buf, "online\n");
+ else
+ return sprintf(buf, "offline\n");
+}
+
+static ssize_t
+store_auto_online_blocks(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ if (sysfs_streq(buf, "online"))
+ memhp_auto_online = true;
+ else if (sysfs_streq(buf, "offline"))
+ memhp_auto_online = false;
+ else
+ return -EINVAL;
+
+ return count;
+}
+
+static DEVICE_ATTR(auto_online_blocks, 0644, show_auto_online_blocks,
+ store_auto_online_blocks);
+
+/*
* Some architectures will have custom drivers to do this, and
* will not need to do it from userspace. The fake hot-add code
* as well as ppc64 will do all of their discovery in userspace
@@ -746,6 +777,7 @@ static struct attribute *memory_root_attrs[] = {
#endif
&dev_attr_block_size_bytes.attr,
+ &dev_attr_auto_online_blocks.attr,
NULL
};
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 301b785f9f56..56705b52758e 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -104,6 +104,7 @@ static void genpd_sd_counter_inc(struct generic_pm_domain *genpd)
static int genpd_power_on(struct generic_pm_domain *genpd, bool timed)
{
+ unsigned int state_idx = genpd->state_idx;
ktime_t time_start;
s64 elapsed_ns;
int ret;
@@ -120,10 +121,10 @@ static int genpd_power_on(struct generic_pm_domain *genpd, bool timed)
return ret;
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
- if (elapsed_ns <= genpd->power_on_latency_ns)
+ if (elapsed_ns <= genpd->states[state_idx].power_on_latency_ns)
return ret;
- genpd->power_on_latency_ns = elapsed_ns;
+ genpd->states[state_idx].power_on_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
genpd->name, "on", elapsed_ns);
@@ -133,6 +134,7 @@ static int genpd_power_on(struct generic_pm_domain *genpd, bool timed)
static int genpd_power_off(struct generic_pm_domain *genpd, bool timed)
{
+ unsigned int state_idx = genpd->state_idx;
ktime_t time_start;
s64 elapsed_ns;
int ret;
@@ -149,10 +151,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool timed)
return ret;
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
- if (elapsed_ns <= genpd->power_off_latency_ns)
+ if (elapsed_ns <= genpd->states[state_idx].power_off_latency_ns)
return ret;
- genpd->power_off_latency_ns = elapsed_ns;
+ genpd->states[state_idx].power_off_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
genpd->name, "off", elapsed_ns);
@@ -485,8 +487,13 @@ static int pm_genpd_runtime_resume(struct device *dev)
if (timed && runtime_pm)
time_start = ktime_get();
- genpd_start_dev(genpd, dev);
- genpd_restore_dev(genpd, dev);
+ ret = genpd_start_dev(genpd, dev);
+ if (ret)
+ goto err_poweroff;
+
+ ret = genpd_restore_dev(genpd, dev);
+ if (ret)
+ goto err_stop;
/* Update resume latency value if the measured time exceeds it. */
if (timed && runtime_pm) {
@@ -501,6 +508,17 @@ static int pm_genpd_runtime_resume(struct device *dev)
}
return 0;
+
+err_stop:
+ genpd_stop_dev(genpd, dev);
+err_poweroff:
+ if (!dev->power.irq_safe) {
+ mutex_lock(&genpd->lock);
+ genpd_poweroff(genpd, 0);
+ mutex_unlock(&genpd->lock);
+ }
+
+ return ret;
}
static bool pd_ignore_unused;
@@ -585,6 +603,8 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd,
|| atomic_read(&genpd->sd_count) > 0)
return;
+ /* Choose the deepest state when suspending */
+ genpd->state_idx = genpd->state_count - 1;
genpd_power_off(genpd, timed);
genpd->status = GPD_STATE_POWER_OFF;
@@ -1378,7 +1398,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
mutex_lock(&subdomain->lock);
mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING);
- if (!list_empty(&subdomain->slave_links) || subdomain->device_count) {
+ if (!list_empty(&subdomain->master_links) || subdomain->device_count) {
pr_warn("%s: unable to remove subdomain %s\n", genpd->name,
subdomain->name);
ret = -EBUSY;
@@ -1508,6 +1528,20 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
genpd->dev_ops.start = pm_clk_resume;
}
+ if (genpd->state_idx >= GENPD_MAX_NUM_STATES) {
+ pr_warn("Initial state index out of bounds.\n");
+ genpd->state_idx = GENPD_MAX_NUM_STATES - 1;
+ }
+
+ if (genpd->state_count > GENPD_MAX_NUM_STATES) {
+ pr_warn("Limiting states to %d\n", GENPD_MAX_NUM_STATES);
+ genpd->state_count = GENPD_MAX_NUM_STATES;
+ }
+
+ /* Use only one "off" state if there were no states declared */
+ if (genpd->state_count == 0)
+ genpd->state_count = 1;
+
mutex_lock(&gpd_list_lock);
list_add(&genpd->gpd_list_node, &gpd_list);
mutex_unlock(&gpd_list_lock);
@@ -1668,6 +1702,9 @@ struct generic_pm_domain *of_genpd_get_from_provider(
struct generic_pm_domain *genpd = ERR_PTR(-ENOENT);
struct of_genpd_provider *provider;
+ if (!genpdspec)
+ return ERR_PTR(-EINVAL);
+
mutex_lock(&of_genpd_mutex);
/* Check if we have such a provider in our array */
@@ -1864,6 +1901,7 @@ static int pm_genpd_summary_one(struct seq_file *s,
struct pm_domain_data *pm_data;
const char *kobj_path;
struct gpd_link *link;
+ char state[16];
int ret;
ret = mutex_lock_interruptible(&genpd->lock);
@@ -1872,7 +1910,13 @@ static int pm_genpd_summary_one(struct seq_file *s,
if (WARN_ON(genpd->status >= ARRAY_SIZE(status_lookup)))
goto exit;
- seq_printf(s, "%-30s %-15s ", genpd->name, status_lookup[genpd->status]);
+ if (genpd->status == GPD_STATE_POWER_OFF)
+ snprintf(state, sizeof(state), "%s-%u",
+ status_lookup[genpd->status], genpd->state_idx);
+ else
+ snprintf(state, sizeof(state), "%s",
+ status_lookup[genpd->status]);
+ seq_printf(s, "%-30s %-15s ", genpd->name, state);
/*
* Modifications on the list require holding locks on both
diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c
index 1e937ac5f456..00a5436dd44b 100644
--- a/drivers/base/power/domain_governor.c
+++ b/drivers/base/power/domain_governor.c
@@ -98,7 +98,8 @@ static bool default_stop_ok(struct device *dev)
*
* This routine must be executed under the PM domain's lock.
*/
-static bool default_power_down_ok(struct dev_pm_domain *pd)
+static bool __default_power_down_ok(struct dev_pm_domain *pd,
+ unsigned int state)
{
struct generic_pm_domain *genpd = pd_to_genpd(pd);
struct gpd_link *link;
@@ -106,27 +107,9 @@ static bool default_power_down_ok(struct dev_pm_domain *pd)
s64 min_off_time_ns;
s64 off_on_time_ns;
- if (genpd->max_off_time_changed) {
- struct gpd_link *link;
-
- /*
- * We have to invalidate the cached results for the masters, so
- * use the observation that default_power_down_ok() is not
- * going to be called for any master until this instance
- * returns.
- */
- list_for_each_entry(link, &genpd->slave_links, slave_node)
- link->master->max_off_time_changed = true;
-
- genpd->max_off_time_changed = false;
- genpd->cached_power_down_ok = false;
- genpd->max_off_time_ns = -1;
- } else {
- return genpd->cached_power_down_ok;
- }
+ off_on_time_ns = genpd->states[state].power_off_latency_ns +
+ genpd->states[state].power_on_latency_ns;
- off_on_time_ns = genpd->power_off_latency_ns +
- genpd->power_on_latency_ns;
min_off_time_ns = -1;
/*
@@ -186,8 +169,6 @@ static bool default_power_down_ok(struct dev_pm_domain *pd)
min_off_time_ns = constraint_ns;
}
- genpd->cached_power_down_ok = true;
-
/*
* If the computed minimum device off time is negative, there are no
* latency constraints, so the domain can spend arbitrary time in the
@@ -201,10 +182,45 @@ static bool default_power_down_ok(struct dev_pm_domain *pd)
* time and the time needed to turn the domain on is the maximum
* theoretical time this domain can spend in the "off" state.
*/
- genpd->max_off_time_ns = min_off_time_ns - genpd->power_on_latency_ns;
+ genpd->max_off_time_ns = min_off_time_ns -
+ genpd->states[state].power_on_latency_ns;
return true;
}
+static bool default_power_down_ok(struct dev_pm_domain *pd)
+{
+ struct generic_pm_domain *genpd = pd_to_genpd(pd);
+ struct gpd_link *link;
+
+ if (!genpd->max_off_time_changed)
+ return genpd->cached_power_down_ok;
+
+ /*
+ * We have to invalidate the cached results for the masters, so
+ * use the observation that default_power_down_ok() is not
+ * going to be called for any master until this instance
+ * returns.
+ */
+ list_for_each_entry(link, &genpd->slave_links, slave_node)
+ link->master->max_off_time_changed = true;
+
+ genpd->max_off_time_ns = -1;
+ genpd->max_off_time_changed = false;
+ genpd->cached_power_down_ok = true;
+ genpd->state_idx = genpd->state_count - 1;
+
+ /* Find a state to power down to, starting from the deepest. */
+ while (!__default_power_down_ok(pd, genpd->state_idx)) {
+ if (genpd->state_idx == 0) {
+ genpd->cached_power_down_ok = false;
+ break;
+ }
+ genpd->state_idx--;
+ }
+
+ return genpd->cached_power_down_ok;
+}
+
static bool always_on_power_down_ok(struct dev_pm_domain *domain)
{
return false;
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index cf351d3dab1c..433b60092972 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -13,50 +13,52 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/clk.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/export.h>
+#include <linux/regulator/consumer.h>
#include "opp.h"
/*
- * The root of the list of all devices. All device_opp structures branch off
- * from here, with each device_opp containing the list of opp it supports in
+ * The root of the list of all opp-tables. All opp_table structures branch off
+ * from here, with each opp_table containing the list of opps it supports in
* various states of availability.
*/
-static LIST_HEAD(dev_opp_list);
+static LIST_HEAD(opp_tables);
/* Lock to allow exclusive modification to the device and opp lists */
-DEFINE_MUTEX(dev_opp_list_lock);
+DEFINE_MUTEX(opp_table_lock);
#define opp_rcu_lockdep_assert() \
do { \
RCU_LOCKDEP_WARN(!rcu_read_lock_held() && \
- !lockdep_is_held(&dev_opp_list_lock), \
- "Missing rcu_read_lock() or " \
- "dev_opp_list_lock protection"); \
+ !lockdep_is_held(&opp_table_lock), \
+ "Missing rcu_read_lock() or " \
+ "opp_table_lock protection"); \
} while (0)
-static struct device_list_opp *_find_list_dev(const struct device *dev,
- struct device_opp *dev_opp)
+static struct opp_device *_find_opp_dev(const struct device *dev,
+ struct opp_table *opp_table)
{
- struct device_list_opp *list_dev;
+ struct opp_device *opp_dev;
- list_for_each_entry(list_dev, &dev_opp->dev_list, node)
- if (list_dev->dev == dev)
- return list_dev;
+ list_for_each_entry(opp_dev, &opp_table->dev_list, node)
+ if (opp_dev->dev == dev)
+ return opp_dev;
return NULL;
}
-static struct device_opp *_managed_opp(const struct device_node *np)
+static struct opp_table *_managed_opp(const struct device_node *np)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
- list_for_each_entry_rcu(dev_opp, &dev_opp_list, node) {
- if (dev_opp->np == np) {
+ list_for_each_entry_rcu(opp_table, &opp_tables, node) {
+ if (opp_table->np == np) {
/*
* Multiple devices can point to the same OPP table and
* so will have same node-pointer, np.
@@ -64,7 +66,7 @@ static struct device_opp *_managed_opp(const struct device_node *np)
* But the OPPs will be considered as shared only if the
* OPP table contains a "opp-shared" property.
*/
- return dev_opp->shared_opp ? dev_opp : NULL;
+ return opp_table->shared_opp ? opp_table : NULL;
}
}
@@ -72,24 +74,24 @@ static struct device_opp *_managed_opp(const struct device_node *np)
}
/**
- * _find_device_opp() - find device_opp struct using device pointer
- * @dev: device pointer used to lookup device OPPs
+ * _find_opp_table() - find opp_table struct using device pointer
+ * @dev: device pointer used to lookup OPP table
*
- * Search list of device OPPs for one containing matching device. Does a RCU
- * reader operation to grab the pointer needed.
+ * Search OPP table for one containing matching device. Does a RCU reader
+ * operation to grab the pointer needed.
*
- * Return: pointer to 'struct device_opp' if found, otherwise -ENODEV or
+ * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or
* -EINVAL based on type of error.
*
* Locking: For readers, this function must be called under rcu_read_lock().
- * device_opp is a RCU protected pointer, which means that device_opp is valid
+ * opp_table is a RCU protected pointer, which means that opp_table is valid
* as long as we are under RCU lock.
*
- * For Writers, this function must be called with dev_opp_list_lock held.
+ * For Writers, this function must be called with opp_table_lock held.
*/
-struct device_opp *_find_device_opp(struct device *dev)
+struct opp_table *_find_opp_table(struct device *dev)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
opp_rcu_lockdep_assert();
@@ -98,9 +100,9 @@ struct device_opp *_find_device_opp(struct device *dev)
return ERR_PTR(-EINVAL);
}
- list_for_each_entry_rcu(dev_opp, &dev_opp_list, node)
- if (_find_list_dev(dev, dev_opp))
- return dev_opp;
+ list_for_each_entry_rcu(opp_table, &opp_tables, node)
+ if (_find_opp_dev(dev, opp_table))
+ return opp_table;
return ERR_PTR(-ENODEV);
}
@@ -213,16 +215,16 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo);
*/
unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
unsigned long clock_latency_ns;
rcu_read_lock();
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp))
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table))
clock_latency_ns = 0;
else
- clock_latency_ns = dev_opp->clock_latency_ns_max;
+ clock_latency_ns = opp_table->clock_latency_ns_max;
rcu_read_unlock();
return clock_latency_ns;
@@ -230,6 +232,82 @@ unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency);
/**
+ * dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds
+ * @dev: device for which we do this operation
+ *
+ * Return: This function returns the max voltage latency in nanoseconds.
+ *
+ * Locking: This function takes rcu_read_lock().
+ */
+unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
+{
+ struct opp_table *opp_table;
+ struct dev_pm_opp *opp;
+ struct regulator *reg;
+ unsigned long latency_ns = 0;
+ unsigned long min_uV = ~0, max_uV = 0;
+ int ret;
+
+ rcu_read_lock();
+
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ rcu_read_unlock();
+ return 0;
+ }
+
+ reg = opp_table->regulator;
+ if (IS_ERR(reg)) {
+ /* Regulator may not be required for device */
+ if (reg)
+ dev_err(dev, "%s: Invalid regulator (%ld)\n", __func__,
+ PTR_ERR(reg));
+ rcu_read_unlock();
+ return 0;
+ }
+
+ list_for_each_entry_rcu(opp, &opp_table->opp_list, node) {
+ if (!opp->available)
+ continue;
+
+ if (opp->u_volt_min < min_uV)
+ min_uV = opp->u_volt_min;
+ if (opp->u_volt_max > max_uV)
+ max_uV = opp->u_volt_max;
+ }
+
+ rcu_read_unlock();
+
+ /*
+ * The caller needs to ensure that opp_table (and hence the regulator)
+ * isn't freed, while we are executing this routine.
+ */
+ ret = regulator_set_voltage_time(reg, min_uV, max_uV);
+ if (ret > 0)
+ latency_ns = ret * 1000;
+
+ return latency_ns;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency);
+
+/**
+ * dev_pm_opp_get_max_transition_latency() - Get max transition latency in
+ * nanoseconds
+ * @dev: device for which we do this operation
+ *
+ * Return: This function returns the max transition latency, in nanoseconds, to
+ * switch from one OPP to other.
+ *
+ * Locking: This function takes rcu_read_lock().
+ */
+unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
+{
+ return dev_pm_opp_get_max_volt_latency(dev) +
+ dev_pm_opp_get_max_clock_latency(dev);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency);
+
+/**
* dev_pm_opp_get_suspend_opp() - Get suspend opp
* @dev: device for which we do this operation
*
@@ -244,21 +322,21 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency);
*/
struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
opp_rcu_lockdep_assert();
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp) || !dev_opp->suspend_opp ||
- !dev_opp->suspend_opp->available)
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table) || !opp_table->suspend_opp ||
+ !opp_table->suspend_opp->available)
return NULL;
- return dev_opp->suspend_opp;
+ return opp_table->suspend_opp;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp);
/**
- * dev_pm_opp_get_opp_count() - Get number of opps available in the opp list
+ * dev_pm_opp_get_opp_count() - Get number of opps available in the opp table
* @dev: device for which we do this operation
*
* Return: This function returns the number of available opps if there are any,
@@ -268,21 +346,21 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp);
*/
int dev_pm_opp_get_opp_count(struct device *dev)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct dev_pm_opp *temp_opp;
int count = 0;
rcu_read_lock();
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp)) {
- count = PTR_ERR(dev_opp);
- dev_err(dev, "%s: device OPP not found (%d)\n",
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ count = PTR_ERR(opp_table);
+ dev_err(dev, "%s: OPP table not found (%d)\n",
__func__, count);
goto out_unlock;
}
- list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) {
+ list_for_each_entry_rcu(temp_opp, &opp_table->opp_list, node) {
if (temp_opp->available)
count++;
}
@@ -299,7 +377,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
* @freq: frequency to search for
* @available: true/false - match for available opp
*
- * Return: Searches for exact match in the opp list and returns pointer to the
+ * Return: Searches for exact match in the opp table and returns pointer to the
* matching opp if found, else returns ERR_PTR in case of error and should
* be handled using IS_ERR. Error return values can be:
* EINVAL: for bad pointer
@@ -323,19 +401,20 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
unsigned long freq,
bool available)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
opp_rcu_lockdep_assert();
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp)) {
- int r = PTR_ERR(dev_opp);
- dev_err(dev, "%s: device OPP not found (%d)\n", __func__, r);
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ int r = PTR_ERR(opp_table);
+
+ dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
return ERR_PTR(r);
}
- list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) {
+ list_for_each_entry_rcu(temp_opp, &opp_table->opp_list, node) {
if (temp_opp->available == available &&
temp_opp->rate == freq) {
opp = temp_opp;
@@ -371,7 +450,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact);
struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
opp_rcu_lockdep_assert();
@@ -381,11 +460,11 @@ struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
return ERR_PTR(-EINVAL);
}
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp))
- return ERR_CAST(dev_opp);
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table))
+ return ERR_CAST(opp_table);
- list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) {
+ list_for_each_entry_rcu(temp_opp, &opp_table->opp_list, node) {
if (temp_opp->available && temp_opp->rate >= *freq) {
opp = temp_opp;
*freq = opp->rate;
@@ -421,7 +500,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
opp_rcu_lockdep_assert();
@@ -431,11 +510,11 @@ struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
return ERR_PTR(-EINVAL);
}
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp))
- return ERR_CAST(dev_opp);
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table))
+ return ERR_CAST(opp_table);
- list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) {
+ list_for_each_entry_rcu(temp_opp, &opp_table->opp_list, node) {
if (temp_opp->available) {
/* go to the next node, before choosing prev */
if (temp_opp->rate > *freq)
@@ -451,130 +530,343 @@ struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
-/* List-dev Helpers */
-static void _kfree_list_dev_rcu(struct rcu_head *head)
+/*
+ * The caller needs to ensure that opp_table (and hence the clk) isn't freed,
+ * while clk returned here is used.
+ */
+static struct clk *_get_opp_clk(struct device *dev)
+{
+ struct opp_table *opp_table;
+ struct clk *clk;
+
+ rcu_read_lock();
+
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ dev_err(dev, "%s: device opp doesn't exist\n", __func__);
+ clk = ERR_CAST(opp_table);
+ goto unlock;
+ }
+
+ clk = opp_table->clk;
+ if (IS_ERR(clk))
+ dev_err(dev, "%s: No clock available for the device\n",
+ __func__);
+
+unlock:
+ rcu_read_unlock();
+ return clk;
+}
+
+static int _set_opp_voltage(struct device *dev, struct regulator *reg,
+ unsigned long u_volt, unsigned long u_volt_min,
+ unsigned long u_volt_max)
+{
+ int ret;
+
+ /* Regulator not available for device */
+ if (IS_ERR(reg)) {
+ dev_dbg(dev, "%s: regulator not available: %ld\n", __func__,
+ PTR_ERR(reg));
+ return 0;
+ }
+
+ dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__, u_volt_min,
+ u_volt, u_volt_max);
+
+ ret = regulator_set_voltage_triplet(reg, u_volt_min, u_volt,
+ u_volt_max);
+ if (ret)
+ dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n",
+ __func__, u_volt_min, u_volt, u_volt_max, ret);
+
+ return ret;
+}
+
+/**
+ * dev_pm_opp_set_rate() - Configure new OPP based on frequency
+ * @dev: device for which we do this operation
+ * @target_freq: frequency to achieve
+ *
+ * This configures the power-supplies and clock source to the levels specified
+ * by the OPP corresponding to the target_freq.
+ *
+ * Locking: This function takes rcu_read_lock().
+ */
+int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
+{
+ struct opp_table *opp_table;
+ struct dev_pm_opp *old_opp, *opp;
+ struct regulator *reg;
+ struct clk *clk;
+ unsigned long freq, old_freq;
+ unsigned long u_volt, u_volt_min, u_volt_max;
+ unsigned long ou_volt, ou_volt_min, ou_volt_max;
+ int ret;
+
+ if (unlikely(!target_freq)) {
+ dev_err(dev, "%s: Invalid target frequency %lu\n", __func__,
+ target_freq);
+ return -EINVAL;
+ }
+
+ clk = _get_opp_clk(dev);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ freq = clk_round_rate(clk, target_freq);
+ if ((long)freq <= 0)
+ freq = target_freq;
+
+ old_freq = clk_get_rate(clk);
+
+ /* Return early if nothing to do */
+ if (old_freq == freq) {
+ dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n",
+ __func__, freq);
+ return 0;
+ }
+
+ rcu_read_lock();
+
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ dev_err(dev, "%s: device opp doesn't exist\n", __func__);
+ rcu_read_unlock();
+ return PTR_ERR(opp_table);
+ }
+
+ old_opp = dev_pm_opp_find_freq_ceil(dev, &old_freq);
+ if (!IS_ERR(old_opp)) {
+ ou_volt = old_opp->u_volt;
+ ou_volt_min = old_opp->u_volt_min;
+ ou_volt_max = old_opp->u_volt_max;
+ } else {
+ dev_err(dev, "%s: failed to find current OPP for freq %lu (%ld)\n",
+ __func__, old_freq, PTR_ERR(old_opp));
+ }
+
+ opp = dev_pm_opp_find_freq_ceil(dev, &freq);
+ if (IS_ERR(opp)) {
+ ret = PTR_ERR(opp);
+ dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n",
+ __func__, freq, ret);
+ rcu_read_unlock();
+ return ret;
+ }
+
+ u_volt = opp->u_volt;
+ u_volt_min = opp->u_volt_min;
+ u_volt_max = opp->u_volt_max;
+
+ reg = opp_table->regulator;
+
+ rcu_read_unlock();
+
+ /* Scaling up? Scale voltage before frequency */
+ if (freq > old_freq) {
+ ret = _set_opp_voltage(dev, reg, u_volt, u_volt_min,
+ u_volt_max);
+ if (ret)
+ goto restore_voltage;
+ }
+
+ /* Change frequency */
+
+ dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n",
+ __func__, old_freq, freq);
+
+ ret = clk_set_rate(clk, freq);
+ if (ret) {
+ dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
+ ret);
+ goto restore_voltage;
+ }
+
+ /* Scaling down? Scale voltage after frequency */
+ if (freq < old_freq) {
+ ret = _set_opp_voltage(dev, reg, u_volt, u_volt_min,
+ u_volt_max);
+ if (ret)
+ goto restore_freq;
+ }
+
+ return 0;
+
+restore_freq:
+ if (clk_set_rate(clk, old_freq))
+ dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n",
+ __func__, old_freq);
+restore_voltage:
+ /* This shouldn't harm even if the voltages weren't updated earlier */
+ if (!IS_ERR(old_opp))
+ _set_opp_voltage(dev, reg, ou_volt, ou_volt_min, ou_volt_max);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate);
+
+/* OPP-dev Helpers */
+static void _kfree_opp_dev_rcu(struct rcu_head *head)
{
- struct device_list_opp *list_dev;
+ struct opp_device *opp_dev;
- list_dev = container_of(head, struct device_list_opp, rcu_head);
- kfree_rcu(list_dev, rcu_head);
+ opp_dev = container_of(head, struct opp_device, rcu_head);
+ kfree_rcu(opp_dev, rcu_head);
}
-static void _remove_list_dev(struct device_list_opp *list_dev,
- struct device_opp *dev_opp)
+static void _remove_opp_dev(struct opp_device *opp_dev,
+ struct opp_table *opp_table)
{
- opp_debug_unregister(list_dev, dev_opp);
- list_del(&list_dev->node);
- call_srcu(&dev_opp->srcu_head.srcu, &list_dev->rcu_head,
- _kfree_list_dev_rcu);
+ opp_debug_unregister(opp_dev, opp_table);
+ list_del(&opp_dev->node);
+ call_srcu(&opp_table->srcu_head.srcu, &opp_dev->rcu_head,
+ _kfree_opp_dev_rcu);
}
-struct device_list_opp *_add_list_dev(const struct device *dev,
- struct device_opp *dev_opp)
+struct opp_device *_add_opp_dev(const struct device *dev,
+ struct opp_table *opp_table)
{
- struct device_list_opp *list_dev;
+ struct opp_device *opp_dev;
int ret;
- list_dev = kzalloc(sizeof(*list_dev), GFP_KERNEL);
- if (!list_dev)
+ opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL);
+ if (!opp_dev)
return NULL;
- /* Initialize list-dev */
- list_dev->dev = dev;
- list_add_rcu(&list_dev->node, &dev_opp->dev_list);
+ /* Initialize opp-dev */
+ opp_dev->dev = dev;
+ list_add_rcu(&opp_dev->node, &opp_table->dev_list);
- /* Create debugfs entries for the dev_opp */
- ret = opp_debug_register(list_dev, dev_opp);
+ /* Create debugfs entries for the opp_table */
+ ret = opp_debug_register(opp_dev, opp_table);
if (ret)
dev_err(dev, "%s: Failed to register opp debugfs (%d)\n",
__func__, ret);
- return list_dev;
+ return opp_dev;
}
/**
- * _add_device_opp() - Find device OPP table or allocate a new one
+ * _add_opp_table() - Find OPP table or allocate a new one
* @dev: device for which we do this operation
*
* It tries to find an existing table first, if it couldn't find one, it
* allocates a new OPP table and returns that.
*
- * Return: valid device_opp pointer if success, else NULL.
+ * Return: valid opp_table pointer if success, else NULL.
*/
-static struct device_opp *_add_device_opp(struct device *dev)
+static struct opp_table *_add_opp_table(struct device *dev)
{
- struct device_opp *dev_opp;
- struct device_list_opp *list_dev;
+ struct opp_table *opp_table;
+ struct opp_device *opp_dev;
+ struct device_node *np;
+ int ret;
- /* Check for existing list for 'dev' first */
- dev_opp = _find_device_opp(dev);
- if (!IS_ERR(dev_opp))
- return dev_opp;
+ /* Check for existing table for 'dev' first */
+ opp_table = _find_opp_table(dev);
+ if (!IS_ERR(opp_table))
+ return opp_table;
/*
- * Allocate a new device OPP table. In the infrequent case where a new
+ * Allocate a new OPP table. In the infrequent case where a new
* device is needed to be added, we pay this penalty.
*/
- dev_opp = kzalloc(sizeof(*dev_opp), GFP_KERNEL);
- if (!dev_opp)
+ opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL);
+ if (!opp_table)
return NULL;
- INIT_LIST_HEAD(&dev_opp->dev_list);
+ INIT_LIST_HEAD(&opp_table->dev_list);
- list_dev = _add_list_dev(dev, dev_opp);
- if (!list_dev) {
- kfree(dev_opp);
+ opp_dev = _add_opp_dev(dev, opp_table);
+ if (!opp_dev) {
+ kfree(opp_table);
return NULL;
}
- srcu_init_notifier_head(&dev_opp->srcu_head);
- INIT_LIST_HEAD(&dev_opp->opp_list);
+ /*
+ * Only required for backward compatibility with v1 bindings, but isn't
+ * harmful for other cases. And so we do it unconditionally.
+ */
+ np = of_node_get(dev->of_node);
+ if (np) {
+ u32 val;
+
+ if (!of_property_read_u32(np, "clock-latency", &val))
+ opp_table->clock_latency_ns_max = val;
+ of_property_read_u32(np, "voltage-tolerance",
+ &opp_table->voltage_tolerance_v1);
+ of_node_put(np);
+ }
+
+ /* Set regulator to a non-NULL error value */
+ opp_table->regulator = ERR_PTR(-ENXIO);
+
+ /* Find clk for the device */
+ opp_table->clk = clk_get(dev, NULL);
+ if (IS_ERR(opp_table->clk)) {
+ ret = PTR_ERR(opp_table->clk);
+ if (ret != -EPROBE_DEFER)
+ dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__,
+ ret);
+ }
- /* Secure the device list modification */
- list_add_rcu(&dev_opp->node, &dev_opp_list);
- return dev_opp;
+ srcu_init_notifier_head(&opp_table->srcu_head);
+ INIT_LIST_HEAD(&opp_table->opp_list);
+
+ /* Secure the device table modification */
+ list_add_rcu(&opp_table->node, &opp_tables);
+ return opp_table;
}
/**
- * _kfree_device_rcu() - Free device_opp RCU handler
+ * _kfree_device_rcu() - Free opp_table RCU handler
* @head: RCU head
*/
static void _kfree_device_rcu(struct rcu_head *head)
{
- struct device_opp *device_opp = container_of(head, struct device_opp, rcu_head);
+ struct opp_table *opp_table = container_of(head, struct opp_table,
+ rcu_head);
- kfree_rcu(device_opp, rcu_head);
+ kfree_rcu(opp_table, rcu_head);
}
/**
- * _remove_device_opp() - Removes a device OPP table
- * @dev_opp: device OPP table to be removed.
+ * _remove_opp_table() - Removes a OPP table
+ * @opp_table: OPP table to be removed.
*
- * Removes/frees device OPP table it it doesn't contain any OPPs.
+ * Removes/frees OPP table if it doesn't contain any OPPs.
*/
-static void _remove_device_opp(struct device_opp *dev_opp)
+static void _remove_opp_table(struct opp_table *opp_table)
{
- struct device_list_opp *list_dev;
+ struct opp_device *opp_dev;
+
+ if (!list_empty(&opp_table->opp_list))
+ return;
- if (!list_empty(&dev_opp->opp_list))
+ if (opp_table->supported_hw)
return;
- if (dev_opp->supported_hw)
+ if (opp_table->prop_name)
return;
- if (dev_opp->prop_name)
+ if (!IS_ERR(opp_table->regulator))
return;
- list_dev = list_first_entry(&dev_opp->dev_list, struct device_list_opp,
- node);
+ /* Release clk */
+ if (!IS_ERR(opp_table->clk))
+ clk_put(opp_table->clk);
- _remove_list_dev(list_dev, dev_opp);
+ opp_dev = list_first_entry(&opp_table->dev_list, struct opp_device,
+ node);
+
+ _remove_opp_dev(opp_dev, opp_table);
/* dev_list must be empty now */
- WARN_ON(!list_empty(&dev_opp->dev_list));
+ WARN_ON(!list_empty(&opp_table->dev_list));
- list_del_rcu(&dev_opp->node);
- call_srcu(&dev_opp->srcu_head.srcu, &dev_opp->rcu_head,
+ list_del_rcu(&opp_table->node);
+ call_srcu(&opp_table->srcu_head.srcu, &opp_table->rcu_head,
_kfree_device_rcu);
}
@@ -591,17 +883,17 @@ static void _kfree_opp_rcu(struct rcu_head *head)
/**
* _opp_remove() - Remove an OPP from a table definition
- * @dev_opp: points back to the device_opp struct this opp belongs to
+ * @opp_table: points back to the opp_table struct this opp belongs to
* @opp: pointer to the OPP to remove
* @notify: OPP_EVENT_REMOVE notification should be sent or not
*
- * This function removes an opp definition from the opp list.
+ * This function removes an opp definition from the opp table.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* It is assumed that the caller holds required mutex for an RCU updater
* strategy.
*/
-static void _opp_remove(struct device_opp *dev_opp,
+static void _opp_remove(struct opp_table *opp_table,
struct dev_pm_opp *opp, bool notify)
{
/*
@@ -609,22 +901,23 @@ static void _opp_remove(struct device_opp *dev_opp,
* frequency/voltage list.
*/
if (notify)
- srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_REMOVE, opp);
+ srcu_notifier_call_chain(&opp_table->srcu_head,
+ OPP_EVENT_REMOVE, opp);
opp_debug_remove_one(opp);
list_del_rcu(&opp->node);
- call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
+ call_srcu(&opp_table->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
- _remove_device_opp(dev_opp);
+ _remove_opp_table(opp_table);
}
/**
- * dev_pm_opp_remove() - Remove an OPP from OPP list
+ * dev_pm_opp_remove() - Remove an OPP from OPP table
* @dev: device for which we do this operation
* @freq: OPP to remove with matching 'freq'
*
- * This function removes an opp from the opp list.
+ * This function removes an opp from the opp table.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -633,17 +926,17 @@ static void _opp_remove(struct device_opp *dev_opp,
void dev_pm_opp_remove(struct device *dev, unsigned long freq)
{
struct dev_pm_opp *opp;
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
bool found = false;
- /* Hold our list modification lock here */
- mutex_lock(&dev_opp_list_lock);
+ /* Hold our table modification lock here */
+ mutex_lock(&opp_table_lock);
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp))
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table))
goto unlock;
- list_for_each_entry(opp, &dev_opp->opp_list, node) {
+ list_for_each_entry(opp, &opp_table->opp_list, node) {
if (opp->rate == freq) {
found = true;
break;
@@ -656,14 +949,14 @@ void dev_pm_opp_remove(struct device *dev, unsigned long freq)
goto unlock;
}
- _opp_remove(dev_opp, opp, true);
+ _opp_remove(opp_table, opp, true);
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
static struct dev_pm_opp *_allocate_opp(struct device *dev,
- struct device_opp **dev_opp)
+ struct opp_table **opp_table)
{
struct dev_pm_opp *opp;
@@ -674,8 +967,8 @@ static struct dev_pm_opp *_allocate_opp(struct device *dev,
INIT_LIST_HEAD(&opp->node);
- *dev_opp = _add_device_opp(dev);
- if (!*dev_opp) {
+ *opp_table = _add_opp_table(dev);
+ if (!*opp_table) {
kfree(opp);
return NULL;
}
@@ -683,22 +976,38 @@ static struct dev_pm_opp *_allocate_opp(struct device *dev,
return opp;
}
+static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
+ struct opp_table *opp_table)
+{
+ struct regulator *reg = opp_table->regulator;
+
+ if (!IS_ERR(reg) &&
+ !regulator_is_supported_voltage(reg, opp->u_volt_min,
+ opp->u_volt_max)) {
+ pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
+ __func__, opp->u_volt_min, opp->u_volt_max);
+ return false;
+ }
+
+ return true;
+}
+
static int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
- struct device_opp *dev_opp)
+ struct opp_table *opp_table)
{
struct dev_pm_opp *opp;
- struct list_head *head = &dev_opp->opp_list;
+ struct list_head *head = &opp_table->opp_list;
int ret;
/*
* Insert new OPP in order of increasing frequency and discard if
* already present.
*
- * Need to use &dev_opp->opp_list in the condition part of the 'for'
+ * Need to use &opp_table->opp_list in the condition part of the 'for'
* loop, don't replace it with head otherwise it will become an infinite
* loop.
*/
- list_for_each_entry_rcu(opp, &dev_opp->opp_list, node) {
+ list_for_each_entry_rcu(opp, &opp_table->opp_list, node) {
if (new_opp->rate > opp->rate) {
head = &opp->node;
continue;
@@ -716,14 +1025,20 @@ static int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
0 : -EEXIST;
}
- new_opp->dev_opp = dev_opp;
+ new_opp->opp_table = opp_table;
list_add_rcu(&new_opp->node, head);
- ret = opp_debug_create_one(new_opp, dev_opp);
+ ret = opp_debug_create_one(new_opp, opp_table);
if (ret)
dev_err(dev, "%s: Failed to register opp to debugfs (%d)\n",
__func__, ret);
+ if (!_opp_supported_by_regulators(new_opp, opp_table)) {
+ new_opp->available = false;
+ dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n",
+ __func__, new_opp->rate);
+ }
+
return 0;
}
@@ -734,14 +1049,14 @@ static int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
* @u_volt: Voltage in uVolts for this OPP
* @dynamic: Dynamically added OPPs.
*
- * This function adds an opp definition to the opp list and returns status.
+ * This function adds an opp definition to the opp table and returns status.
* The opp is made available by default and it can be controlled using
* dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove.
*
* NOTE: "dynamic" parameter impacts OPPs added by the dev_pm_opp_of_add_table
* and freed by dev_pm_opp_of_remove_table.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -757,14 +1072,15 @@ static int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
static int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
bool dynamic)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct dev_pm_opp *new_opp;
+ unsigned long tol;
int ret;
- /* Hold our list modification lock here */
- mutex_lock(&dev_opp_list_lock);
+ /* Hold our table modification lock here */
+ mutex_lock(&opp_table_lock);
- new_opp = _allocate_opp(dev, &dev_opp);
+ new_opp = _allocate_opp(dev, &opp_table);
if (!new_opp) {
ret = -ENOMEM;
goto unlock;
@@ -772,33 +1088,36 @@ static int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
/* populate the opp table */
new_opp->rate = freq;
+ tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
new_opp->u_volt = u_volt;
+ new_opp->u_volt_min = u_volt - tol;
+ new_opp->u_volt_max = u_volt + tol;
new_opp->available = true;
new_opp->dynamic = dynamic;
- ret = _opp_add(dev, new_opp, dev_opp);
+ ret = _opp_add(dev, new_opp, opp_table);
if (ret)
goto free_opp;
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
/*
* Notify the changes in the availability of the operable
* frequency/voltage list.
*/
- srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_ADD, new_opp);
+ srcu_notifier_call_chain(&opp_table->srcu_head, OPP_EVENT_ADD, new_opp);
return 0;
free_opp:
- _opp_remove(dev_opp, new_opp, false);
+ _opp_remove(opp_table, new_opp, false);
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
return ret;
}
/* TODO: Support multiple regulators */
static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
- struct device_opp *dev_opp)
+ struct opp_table *opp_table)
{
u32 microvolt[3] = {0};
u32 val;
@@ -807,9 +1126,9 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
char name[NAME_MAX];
/* Search for "opp-microvolt-<name>" */
- if (dev_opp->prop_name) {
+ if (opp_table->prop_name) {
snprintf(name, sizeof(name), "opp-microvolt-%s",
- dev_opp->prop_name);
+ opp_table->prop_name);
prop = of_find_property(opp->np, name, NULL);
}
@@ -844,14 +1163,20 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
}
opp->u_volt = microvolt[0];
- opp->u_volt_min = microvolt[1];
- opp->u_volt_max = microvolt[2];
+
+ if (count == 1) {
+ opp->u_volt_min = opp->u_volt;
+ opp->u_volt_max = opp->u_volt;
+ } else {
+ opp->u_volt_min = microvolt[1];
+ opp->u_volt_max = microvolt[2];
+ }
/* Search for "opp-microamp-<name>" */
prop = NULL;
- if (dev_opp->prop_name) {
+ if (opp_table->prop_name) {
snprintf(name, sizeof(name), "opp-microamp-%s",
- dev_opp->prop_name);
+ opp_table->prop_name);
prop = of_find_property(opp->np, name, NULL);
}
@@ -878,7 +1203,7 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
* OPPs, which are available for those versions, based on its 'opp-supported-hw'
* property.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -887,44 +1212,44 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
int dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
unsigned int count)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
int ret = 0;
- /* Hold our list modification lock here */
- mutex_lock(&dev_opp_list_lock);
+ /* Hold our table modification lock here */
+ mutex_lock(&opp_table_lock);
- dev_opp = _add_device_opp(dev);
- if (!dev_opp) {
+ opp_table = _add_opp_table(dev);
+ if (!opp_table) {
ret = -ENOMEM;
goto unlock;
}
- /* Make sure there are no concurrent readers while updating dev_opp */
- WARN_ON(!list_empty(&dev_opp->opp_list));
+ /* Make sure there are no concurrent readers while updating opp_table */
+ WARN_ON(!list_empty(&opp_table->opp_list));
- /* Do we already have a version hierarchy associated with dev_opp? */
- if (dev_opp->supported_hw) {
+ /* Do we already have a version hierarchy associated with opp_table? */
+ if (opp_table->supported_hw) {
dev_err(dev, "%s: Already have supported hardware list\n",
__func__);
ret = -EBUSY;
goto err;
}
- dev_opp->supported_hw = kmemdup(versions, count * sizeof(*versions),
+ opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions),
GFP_KERNEL);
- if (!dev_opp->supported_hw) {
+ if (!opp_table->supported_hw) {
ret = -ENOMEM;
goto err;
}
- dev_opp->supported_hw_count = count;
- mutex_unlock(&dev_opp_list_lock);
+ opp_table->supported_hw_count = count;
+ mutex_unlock(&opp_table_lock);
return 0;
err:
- _remove_device_opp(dev_opp);
+ _remove_opp_table(opp_table);
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
return ret;
}
@@ -932,13 +1257,13 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw);
/**
* dev_pm_opp_put_supported_hw() - Releases resources blocked for supported hw
- * @dev: Device for which supported-hw has to be set.
+ * @dev: Device for which supported-hw has to be put.
*
* This is required only for the V2 bindings, and is called for a matching
- * dev_pm_opp_set_supported_hw(). Until this is called, the device_opp structure
+ * dev_pm_opp_set_supported_hw(). Until this is called, the opp_table structure
* will not be freed.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -946,42 +1271,43 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw);
*/
void dev_pm_opp_put_supported_hw(struct device *dev)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
- /* Hold our list modification lock here */
- mutex_lock(&dev_opp_list_lock);
+ /* Hold our table modification lock here */
+ mutex_lock(&opp_table_lock);
- /* Check for existing list for 'dev' first */
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp)) {
- dev_err(dev, "Failed to find dev_opp: %ld\n", PTR_ERR(dev_opp));
+ /* Check for existing table for 'dev' first */
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ dev_err(dev, "Failed to find opp_table: %ld\n",
+ PTR_ERR(opp_table));
goto unlock;
}
- /* Make sure there are no concurrent readers while updating dev_opp */
- WARN_ON(!list_empty(&dev_opp->opp_list));
+ /* Make sure there are no concurrent readers while updating opp_table */
+ WARN_ON(!list_empty(&opp_table->opp_list));
- if (!dev_opp->supported_hw) {
+ if (!opp_table->supported_hw) {
dev_err(dev, "%s: Doesn't have supported hardware list\n",
__func__);
goto unlock;
}
- kfree(dev_opp->supported_hw);
- dev_opp->supported_hw = NULL;
- dev_opp->supported_hw_count = 0;
+ kfree(opp_table->supported_hw);
+ opp_table->supported_hw = NULL;
+ opp_table->supported_hw_count = 0;
- /* Try freeing device_opp if this was the last blocking resource */
- _remove_device_opp(dev_opp);
+ /* Try freeing opp_table if this was the last blocking resource */
+ _remove_opp_table(opp_table);
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw);
/**
* dev_pm_opp_set_prop_name() - Set prop-extn name
- * @dev: Device for which the regulator has to be set.
+ * @dev: Device for which the prop-name has to be set.
* @name: name to postfix to properties.
*
* This is required only for the V2 bindings, and it enables a platform to
@@ -989,7 +1315,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw);
* which the extension will apply are opp-microvolt and opp-microamp. OPP core
* should postfix the property name with -<name> while looking for them.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -997,42 +1323,42 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw);
*/
int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
int ret = 0;
- /* Hold our list modification lock here */
- mutex_lock(&dev_opp_list_lock);
+ /* Hold our table modification lock here */
+ mutex_lock(&opp_table_lock);
- dev_opp = _add_device_opp(dev);
- if (!dev_opp) {
+ opp_table = _add_opp_table(dev);
+ if (!opp_table) {
ret = -ENOMEM;
goto unlock;
}
- /* Make sure there are no concurrent readers while updating dev_opp */
- WARN_ON(!list_empty(&dev_opp->opp_list));
+ /* Make sure there are no concurrent readers while updating opp_table */
+ WARN_ON(!list_empty(&opp_table->opp_list));
- /* Do we already have a prop-name associated with dev_opp? */
- if (dev_opp->prop_name) {
+ /* Do we already have a prop-name associated with opp_table? */
+ if (opp_table->prop_name) {
dev_err(dev, "%s: Already have prop-name %s\n", __func__,
- dev_opp->prop_name);
+ opp_table->prop_name);
ret = -EBUSY;
goto err;
}
- dev_opp->prop_name = kstrdup(name, GFP_KERNEL);
- if (!dev_opp->prop_name) {
+ opp_table->prop_name = kstrdup(name, GFP_KERNEL);
+ if (!opp_table->prop_name) {
ret = -ENOMEM;
goto err;
}
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
return 0;
err:
- _remove_device_opp(dev_opp);
+ _remove_opp_table(opp_table);
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
return ret;
}
@@ -1040,13 +1366,13 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name);
/**
* dev_pm_opp_put_prop_name() - Releases resources blocked for prop-name
- * @dev: Device for which the regulator has to be set.
+ * @dev: Device for which the prop-name has to be put.
*
* This is required only for the V2 bindings, and is called for a matching
- * dev_pm_opp_set_prop_name(). Until this is called, the device_opp structure
+ * dev_pm_opp_set_prop_name(). Until this is called, the opp_table structure
* will not be freed.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -1054,45 +1380,154 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name);
*/
void dev_pm_opp_put_prop_name(struct device *dev)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
- /* Hold our list modification lock here */
- mutex_lock(&dev_opp_list_lock);
+ /* Hold our table modification lock here */
+ mutex_lock(&opp_table_lock);
- /* Check for existing list for 'dev' first */
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp)) {
- dev_err(dev, "Failed to find dev_opp: %ld\n", PTR_ERR(dev_opp));
+ /* Check for existing table for 'dev' first */
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ dev_err(dev, "Failed to find opp_table: %ld\n",
+ PTR_ERR(opp_table));
goto unlock;
}
- /* Make sure there are no concurrent readers while updating dev_opp */
- WARN_ON(!list_empty(&dev_opp->opp_list));
+ /* Make sure there are no concurrent readers while updating opp_table */
+ WARN_ON(!list_empty(&opp_table->opp_list));
- if (!dev_opp->prop_name) {
+ if (!opp_table->prop_name) {
dev_err(dev, "%s: Doesn't have a prop-name\n", __func__);
goto unlock;
}
- kfree(dev_opp->prop_name);
- dev_opp->prop_name = NULL;
+ kfree(opp_table->prop_name);
+ opp_table->prop_name = NULL;
- /* Try freeing device_opp if this was the last blocking resource */
- _remove_device_opp(dev_opp);
+ /* Try freeing opp_table if this was the last blocking resource */
+ _remove_opp_table(opp_table);
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
-static bool _opp_is_supported(struct device *dev, struct device_opp *dev_opp,
+/**
+ * dev_pm_opp_set_regulator() - Set regulator name for the device
+ * @dev: Device for which regulator name is being set.
+ * @name: Name of the regulator.
+ *
+ * In order to support OPP switching, OPP layer needs to know the name of the
+ * device's regulator, as the core would be required to switch voltages as well.
+ *
+ * This must be called before any OPPs are initialized for the device.
+ *
+ * Locking: The internal opp_table and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ */
+int dev_pm_opp_set_regulator(struct device *dev, const char *name)
+{
+ struct opp_table *opp_table;
+ struct regulator *reg;
+ int ret;
+
+ mutex_lock(&opp_table_lock);
+
+ opp_table = _add_opp_table(dev);
+ if (!opp_table) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+
+ /* This should be called before OPPs are initialized */
+ if (WARN_ON(!list_empty(&opp_table->opp_list))) {
+ ret = -EBUSY;
+ goto err;
+ }
+
+ /* Already have a regulator set */
+ if (WARN_ON(!IS_ERR(opp_table->regulator))) {
+ ret = -EBUSY;
+ goto err;
+ }
+ /* Allocate the regulator */
+ reg = regulator_get_optional(dev, name);
+ if (IS_ERR(reg)) {
+ ret = PTR_ERR(reg);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "%s: no regulator (%s) found: %d\n",
+ __func__, name, ret);
+ goto err;
+ }
+
+ opp_table->regulator = reg;
+
+ mutex_unlock(&opp_table_lock);
+ return 0;
+
+err:
+ _remove_opp_table(opp_table);
+unlock:
+ mutex_unlock(&opp_table_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulator);
+
+/**
+ * dev_pm_opp_put_regulator() - Releases resources blocked for regulator
+ * @dev: Device for which regulator was set.
+ *
+ * Locking: The internal opp_table and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ */
+void dev_pm_opp_put_regulator(struct device *dev)
+{
+ struct opp_table *opp_table;
+
+ mutex_lock(&opp_table_lock);
+
+ /* Check for existing table for 'dev' first */
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ dev_err(dev, "Failed to find opp_table: %ld\n",
+ PTR_ERR(opp_table));
+ goto unlock;
+ }
+
+ if (IS_ERR(opp_table->regulator)) {
+ dev_err(dev, "%s: Doesn't have regulator set\n", __func__);
+ goto unlock;
+ }
+
+ /* Make sure there are no concurrent readers while updating opp_table */
+ WARN_ON(!list_empty(&opp_table->opp_list));
+
+ regulator_put(opp_table->regulator);
+ opp_table->regulator = ERR_PTR(-ENXIO);
+
+ /* Try freeing opp_table if this was the last blocking resource */
+ _remove_opp_table(opp_table);
+
+unlock:
+ mutex_unlock(&opp_table_lock);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulator);
+
+static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
struct device_node *np)
{
- unsigned int count = dev_opp->supported_hw_count;
+ unsigned int count = opp_table->supported_hw_count;
u32 version;
int ret;
- if (!dev_opp->supported_hw)
+ if (!opp_table->supported_hw)
return true;
while (count--) {
@@ -1105,7 +1540,7 @@ static bool _opp_is_supported(struct device *dev, struct device_opp *dev_opp,
}
/* Both of these are bitwise masks of the versions */
- if (!(version & dev_opp->supported_hw[count]))
+ if (!(version & opp_table->supported_hw[count]))
return false;
}
@@ -1117,11 +1552,11 @@ static bool _opp_is_supported(struct device *dev, struct device_opp *dev_opp,
* @dev: device for which we do this operation
* @np: device node
*
- * This function adds an opp definition to the opp list and returns status. The
+ * This function adds an opp definition to the opp table and returns status. The
* opp can be controlled using dev_pm_opp_enable/disable functions and may be
* removed by dev_pm_opp_remove.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -1137,16 +1572,16 @@ static bool _opp_is_supported(struct device *dev, struct device_opp *dev_opp,
*/
static int _opp_add_static_v2(struct device *dev, struct device_node *np)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct dev_pm_opp *new_opp;
u64 rate;
u32 val;
int ret;
- /* Hold our list modification lock here */
- mutex_lock(&dev_opp_list_lock);
+ /* Hold our table modification lock here */
+ mutex_lock(&opp_table_lock);
- new_opp = _allocate_opp(dev, &dev_opp);
+ new_opp = _allocate_opp(dev, &opp_table);
if (!new_opp) {
ret = -ENOMEM;
goto unlock;
@@ -1159,7 +1594,7 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
}
/* Check if the OPP supports hardware's hierarchy of versions or not */
- if (!_opp_is_supported(dev, dev_opp, np)) {
+ if (!_opp_is_supported(dev, opp_table, np)) {
dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate);
goto free_opp;
}
@@ -1179,30 +1614,30 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
if (!of_property_read_u32(np, "clock-latency-ns", &val))
new_opp->clock_latency_ns = val;
- ret = opp_parse_supplies(new_opp, dev, dev_opp);
+ ret = opp_parse_supplies(new_opp, dev, opp_table);
if (ret)
goto free_opp;
- ret = _opp_add(dev, new_opp, dev_opp);
+ ret = _opp_add(dev, new_opp, opp_table);
if (ret)
goto free_opp;
/* OPP to select on device suspend */
if (of_property_read_bool(np, "opp-suspend")) {
- if (dev_opp->suspend_opp) {
+ if (opp_table->suspend_opp) {
dev_warn(dev, "%s: Multiple suspend OPPs found (%lu %lu)\n",
- __func__, dev_opp->suspend_opp->rate,
+ __func__, opp_table->suspend_opp->rate,
new_opp->rate);
} else {
new_opp->suspend = true;
- dev_opp->suspend_opp = new_opp;
+ opp_table->suspend_opp = new_opp;
}
}
- if (new_opp->clock_latency_ns > dev_opp->clock_latency_ns_max)
- dev_opp->clock_latency_ns_max = new_opp->clock_latency_ns;
+ if (new_opp->clock_latency_ns > opp_table->clock_latency_ns_max)
+ opp_table->clock_latency_ns_max = new_opp->clock_latency_ns;
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
__func__, new_opp->turbo, new_opp->rate, new_opp->u_volt,
@@ -1213,13 +1648,13 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
* Notify the changes in the availability of the operable
* frequency/voltage list.
*/
- srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_ADD, new_opp);
+ srcu_notifier_call_chain(&opp_table->srcu_head, OPP_EVENT_ADD, new_opp);
return 0;
free_opp:
- _opp_remove(dev_opp, new_opp, false);
+ _opp_remove(opp_table, new_opp, false);
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
return ret;
}
@@ -1229,11 +1664,11 @@ unlock:
* @freq: Frequency in Hz for this OPP
* @u_volt: Voltage in uVolts for this OPP
*
- * This function adds an opp definition to the opp list and returns status.
+ * This function adds an opp definition to the opp table and returns status.
* The opp is made available by default and it can be controlled using
* dev_pm_opp_enable/disable functions.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -1265,7 +1700,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_add);
* copy operation, returns 0 if no modification was done OR modification was
* successful.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks to
* keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -1274,7 +1709,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_add);
static int _opp_set_availability(struct device *dev, unsigned long freq,
bool availability_req)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct dev_pm_opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV);
int r = 0;
@@ -1283,18 +1718,18 @@ static int _opp_set_availability(struct device *dev, unsigned long freq,
if (!new_opp)
return -ENOMEM;
- mutex_lock(&dev_opp_list_lock);
+ mutex_lock(&opp_table_lock);
- /* Find the device_opp */
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp)) {
- r = PTR_ERR(dev_opp);
+ /* Find the opp_table */
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ r = PTR_ERR(opp_table);
dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
goto unlock;
}
/* Do we have the frequency? */
- list_for_each_entry(tmp_opp, &dev_opp->opp_list, node) {
+ list_for_each_entry(tmp_opp, &opp_table->opp_list, node) {
if (tmp_opp->rate == freq) {
opp = tmp_opp;
break;
@@ -1315,21 +1750,21 @@ static int _opp_set_availability(struct device *dev, unsigned long freq,
new_opp->available = availability_req;
list_replace_rcu(&opp->node, &new_opp->node);
- mutex_unlock(&dev_opp_list_lock);
- call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
+ mutex_unlock(&opp_table_lock);
+ call_srcu(&opp_table->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
/* Notify the change of the OPP availability */
if (availability_req)
- srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_ENABLE,
- new_opp);
+ srcu_notifier_call_chain(&opp_table->srcu_head,
+ OPP_EVENT_ENABLE, new_opp);
else
- srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_DISABLE,
- new_opp);
+ srcu_notifier_call_chain(&opp_table->srcu_head,
+ OPP_EVENT_DISABLE, new_opp);
return 0;
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
kfree(new_opp);
return r;
}
@@ -1343,7 +1778,7 @@ unlock:
* corresponding error value. It is meant to be used for users an OPP available
* after being temporarily made unavailable with dev_pm_opp_disable.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function indirectly uses RCU and mutex locks to keep the
* integrity of the internal data structures. Callers should ensure that
* this function is *NOT* called under RCU protection or in contexts where
@@ -1369,7 +1804,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
* control by users to make this OPP not available until the circumstances are
* right to make it available again (with a call to dev_pm_opp_enable).
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function indirectly uses RCU and mutex locks to keep the
* integrity of the internal data structures. Callers should ensure that
* this function is *NOT* called under RCU protection or in contexts where
@@ -1387,26 +1822,26 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_disable);
/**
* dev_pm_opp_get_notifier() - find notifier_head of the device with opp
- * @dev: device pointer used to lookup device OPPs.
+ * @dev: device pointer used to lookup OPP table.
*
* Return: pointer to notifier head if found, otherwise -ENODEV or
* -EINVAL based on type of error casted as pointer. value must be checked
* with IS_ERR to determine valid pointer or error result.
*
- * Locking: This function must be called under rcu_read_lock(). dev_opp is a RCU
- * protected pointer. The reason for the same is that the opp pointer which is
- * returned will remain valid for use with opp_get_{voltage, freq} only while
+ * Locking: This function must be called under rcu_read_lock(). opp_table is a
+ * RCU protected pointer. The reason for the same is that the opp pointer which
+ * is returned will remain valid for use with opp_get_{voltage, freq} only while
* under the locked area. The pointer returned must be used prior to unlocking
* with rcu_read_unlock() to maintain the integrity of the pointer.
*/
struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev)
{
- struct device_opp *dev_opp = _find_device_opp(dev);
+ struct opp_table *opp_table = _find_opp_table(dev);
- if (IS_ERR(dev_opp))
- return ERR_CAST(dev_opp); /* matching type */
+ if (IS_ERR(opp_table))
+ return ERR_CAST(opp_table); /* matching type */
- return &dev_opp->srcu_head;
+ return &opp_table->srcu_head;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
@@ -1414,11 +1849,11 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
/**
* dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT
* entries
- * @dev: device pointer used to lookup device OPPs.
+ * @dev: device pointer used to lookup OPP table.
*
* Free OPPs created using static entries present in DT.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function indirectly uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
@@ -1426,38 +1861,38 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
*/
void dev_pm_opp_of_remove_table(struct device *dev)
{
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct dev_pm_opp *opp, *tmp;
- /* Hold our list modification lock here */
- mutex_lock(&dev_opp_list_lock);
+ /* Hold our table modification lock here */
+ mutex_lock(&opp_table_lock);
- /* Check for existing list for 'dev' */
- dev_opp = _find_device_opp(dev);
- if (IS_ERR(dev_opp)) {
- int error = PTR_ERR(dev_opp);
+ /* Check for existing table for 'dev' */
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ int error = PTR_ERR(opp_table);
if (error != -ENODEV)
- WARN(1, "%s: dev_opp: %d\n",
+ WARN(1, "%s: opp_table: %d\n",
IS_ERR_OR_NULL(dev) ?
"Invalid device" : dev_name(dev),
error);
goto unlock;
}
- /* Find if dev_opp manages a single device */
- if (list_is_singular(&dev_opp->dev_list)) {
+ /* Find if opp_table manages a single device */
+ if (list_is_singular(&opp_table->dev_list)) {
/* Free static OPPs */
- list_for_each_entry_safe(opp, tmp, &dev_opp->opp_list, node) {
+ list_for_each_entry_safe(opp, tmp, &opp_table->opp_list, node) {
if (!opp->dynamic)
- _opp_remove(dev_opp, opp, true);
+ _opp_remove(opp_table, opp, true);
}
} else {
- _remove_list_dev(_find_list_dev(dev, dev_opp), dev_opp);
+ _remove_opp_dev(_find_opp_dev(dev, opp_table), opp_table);
}
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
@@ -1478,22 +1913,22 @@ struct device_node *_of_get_opp_desc_node(struct device *dev)
static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
{
struct device_node *np;
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
int ret = 0, count = 0;
- mutex_lock(&dev_opp_list_lock);
+ mutex_lock(&opp_table_lock);
- dev_opp = _managed_opp(opp_np);
- if (dev_opp) {
+ opp_table = _managed_opp(opp_np);
+ if (opp_table) {
/* OPPs are already managed */
- if (!_add_list_dev(dev, dev_opp))
+ if (!_add_opp_dev(dev, opp_table))
ret = -ENOMEM;
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
return ret;
}
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
- /* We have opp-list node now, iterate over it and add OPPs */
+ /* We have opp-table node now, iterate over it and add OPPs */
for_each_available_child_of_node(opp_np, np) {
count++;
@@ -1509,19 +1944,19 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
if (WARN_ON(!count))
return -ENOENT;
- mutex_lock(&dev_opp_list_lock);
+ mutex_lock(&opp_table_lock);
- dev_opp = _find_device_opp(dev);
- if (WARN_ON(IS_ERR(dev_opp))) {
- ret = PTR_ERR(dev_opp);
- mutex_unlock(&dev_opp_list_lock);
+ opp_table = _find_opp_table(dev);
+ if (WARN_ON(IS_ERR(opp_table))) {
+ ret = PTR_ERR(opp_table);
+ mutex_unlock(&opp_table_lock);
goto free_table;
}
- dev_opp->np = opp_np;
- dev_opp->shared_opp = of_property_read_bool(opp_np, "opp-shared");
+ opp_table->np = opp_np;
+ opp_table->shared_opp = of_property_read_bool(opp_np, "opp-shared");
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
return 0;
@@ -1550,7 +1985,7 @@ static int _of_add_opp_table_v1(struct device *dev)
*/
nr = prop->length / sizeof(u32);
if (nr % 2) {
- dev_err(dev, "%s: Invalid OPP list\n", __func__);
+ dev_err(dev, "%s: Invalid OPP table\n", __func__);
return -EINVAL;
}
@@ -1570,11 +2005,11 @@ static int _of_add_opp_table_v1(struct device *dev)
/**
* dev_pm_opp_of_add_table() - Initialize opp table from device tree
- * @dev: device pointer used to lookup device OPPs.
+ * @dev: device pointer used to lookup OPP table.
*
* Register the initial OPP table with the OPP library for given device.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function indirectly uses RCU updater strategy with mutex locks
* to keep the integrity of the internal data structures. Callers should ensure
* that this function is *NOT* called under RCU protection or in contexts where
diff --git a/drivers/base/power/opp/cpu.c b/drivers/base/power/opp/cpu.c
index 9f0c15570f64..ba2bdbd932ef 100644
--- a/drivers/base/power/opp/cpu.c
+++ b/drivers/base/power/opp/cpu.c
@@ -31,7 +31,7 @@
* @table: Cpufreq table returned back to caller
*
* Generate a cpufreq table for a provided device- this assumes that the
- * opp list is already initialized and ready for usage.
+ * opp table is already initialized and ready for usage.
*
* This function allocates required memory for the cpufreq table. It is
* expected that the caller does the required maintenance such as freeing
@@ -44,7 +44,7 @@
* WARNING: It is important for the callers to ensure refreshing their copy of
* the table if any of the mentioned functions have been invoked in the interim.
*
- * Locking: The internal device_opp and opp structures are RCU protected.
+ * Locking: The internal opp_table and opp structures are RCU protected.
* Since we just use the regular accessor functions to access the internal data
* structures, we use RCU read lock inside this function. As a result, users of
* this function DONOT need to use explicit locks for invoking.
@@ -122,15 +122,15 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
/* Required only for V1 bindings, as v2 can manage it from DT itself */
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
{
- struct device_list_opp *list_dev;
- struct device_opp *dev_opp;
+ struct opp_device *opp_dev;
+ struct opp_table *opp_table;
struct device *dev;
int cpu, ret = 0;
- mutex_lock(&dev_opp_list_lock);
+ mutex_lock(&opp_table_lock);
- dev_opp = _find_device_opp(cpu_dev);
- if (IS_ERR(dev_opp)) {
+ opp_table = _find_opp_table(cpu_dev);
+ if (IS_ERR(opp_table)) {
ret = -EINVAL;
goto unlock;
}
@@ -146,15 +146,15 @@ int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
continue;
}
- list_dev = _add_list_dev(dev, dev_opp);
- if (!list_dev) {
- dev_err(dev, "%s: failed to add list-dev for cpu%d device\n",
+ opp_dev = _add_opp_dev(dev, opp_table);
+ if (!opp_dev) {
+ dev_err(dev, "%s: failed to add opp-dev for cpu%d device\n",
__func__, cpu);
continue;
}
}
unlock:
- mutex_unlock(&dev_opp_list_lock);
+ mutex_unlock(&opp_table_lock);
return ret;
}
diff --git a/drivers/base/power/opp/debugfs.c b/drivers/base/power/opp/debugfs.c
index ddfe4773e922..ef1ae6b52042 100644
--- a/drivers/base/power/opp/debugfs.c
+++ b/drivers/base/power/opp/debugfs.c
@@ -34,9 +34,9 @@ void opp_debug_remove_one(struct dev_pm_opp *opp)
debugfs_remove_recursive(opp->dentry);
}
-int opp_debug_create_one(struct dev_pm_opp *opp, struct device_opp *dev_opp)
+int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
{
- struct dentry *pdentry = dev_opp->dentry;
+ struct dentry *pdentry = opp_table->dentry;
struct dentry *d;
char name[25]; /* 20 chars for 64 bit value + 5 (opp:\0) */
@@ -83,52 +83,52 @@ int opp_debug_create_one(struct dev_pm_opp *opp, struct device_opp *dev_opp)
return 0;
}
-static int device_opp_debug_create_dir(struct device_list_opp *list_dev,
- struct device_opp *dev_opp)
+static int opp_list_debug_create_dir(struct opp_device *opp_dev,
+ struct opp_table *opp_table)
{
- const struct device *dev = list_dev->dev;
+ const struct device *dev = opp_dev->dev;
struct dentry *d;
- opp_set_dev_name(dev, dev_opp->dentry_name);
+ opp_set_dev_name(dev, opp_table->dentry_name);
/* Create device specific directory */
- d = debugfs_create_dir(dev_opp->dentry_name, rootdir);
+ d = debugfs_create_dir(opp_table->dentry_name, rootdir);
if (!d) {
dev_err(dev, "%s: Failed to create debugfs dir\n", __func__);
return -ENOMEM;
}
- list_dev->dentry = d;
- dev_opp->dentry = d;
+ opp_dev->dentry = d;
+ opp_table->dentry = d;
return 0;
}
-static int device_opp_debug_create_link(struct device_list_opp *list_dev,
- struct device_opp *dev_opp)
+static int opp_list_debug_create_link(struct opp_device *opp_dev,
+ struct opp_table *opp_table)
{
- const struct device *dev = list_dev->dev;
+ const struct device *dev = opp_dev->dev;
char name[NAME_MAX];
struct dentry *d;
- opp_set_dev_name(list_dev->dev, name);
+ opp_set_dev_name(opp_dev->dev, name);
/* Create device specific directory link */
- d = debugfs_create_symlink(name, rootdir, dev_opp->dentry_name);
+ d = debugfs_create_symlink(name, rootdir, opp_table->dentry_name);
if (!d) {
dev_err(dev, "%s: Failed to create link\n", __func__);
return -ENOMEM;
}
- list_dev->dentry = d;
+ opp_dev->dentry = d;
return 0;
}
/**
* opp_debug_register - add a device opp node to the debugfs 'opp' directory
- * @list_dev: list-dev pointer for device
- * @dev_opp: the device-opp being added
+ * @opp_dev: opp-dev pointer for device
+ * @opp_table: the device-opp being added
*
* Dynamically adds device specific directory in debugfs 'opp' directory. If the
* device-opp is shared with other devices, then links will be created for all
@@ -136,73 +136,72 @@ static int device_opp_debug_create_link(struct device_list_opp *list_dev,
*
* Return: 0 on success, otherwise negative error.
*/
-int opp_debug_register(struct device_list_opp *list_dev,
- struct device_opp *dev_opp)
+int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table)
{
if (!rootdir) {
pr_debug("%s: Uninitialized rootdir\n", __func__);
return -EINVAL;
}
- if (dev_opp->dentry)
- return device_opp_debug_create_link(list_dev, dev_opp);
+ if (opp_table->dentry)
+ return opp_list_debug_create_link(opp_dev, opp_table);
- return device_opp_debug_create_dir(list_dev, dev_opp);
+ return opp_list_debug_create_dir(opp_dev, opp_table);
}
-static void opp_migrate_dentry(struct device_list_opp *list_dev,
- struct device_opp *dev_opp)
+static void opp_migrate_dentry(struct opp_device *opp_dev,
+ struct opp_table *opp_table)
{
- struct device_list_opp *new_dev;
+ struct opp_device *new_dev;
const struct device *dev;
struct dentry *dentry;
- /* Look for next list-dev */
- list_for_each_entry(new_dev, &dev_opp->dev_list, node)
- if (new_dev != list_dev)
+ /* Look for next opp-dev */
+ list_for_each_entry(new_dev, &opp_table->dev_list, node)
+ if (new_dev != opp_dev)
break;
/* new_dev is guaranteed to be valid here */
dev = new_dev->dev;
debugfs_remove_recursive(new_dev->dentry);
- opp_set_dev_name(dev, dev_opp->dentry_name);
+ opp_set_dev_name(dev, opp_table->dentry_name);
- dentry = debugfs_rename(rootdir, list_dev->dentry, rootdir,
- dev_opp->dentry_name);
+ dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir,
+ opp_table->dentry_name);
if (!dentry) {
dev_err(dev, "%s: Failed to rename link from: %s to %s\n",
- __func__, dev_name(list_dev->dev), dev_name(dev));
+ __func__, dev_name(opp_dev->dev), dev_name(dev));
return;
}
new_dev->dentry = dentry;
- dev_opp->dentry = dentry;
+ opp_table->dentry = dentry;
}
/**
* opp_debug_unregister - remove a device opp node from debugfs opp directory
- * @list_dev: list-dev pointer for device
- * @dev_opp: the device-opp being removed
+ * @opp_dev: opp-dev pointer for device
+ * @opp_table: the device-opp being removed
*
* Dynamically removes device specific directory from debugfs 'opp' directory.
*/
-void opp_debug_unregister(struct device_list_opp *list_dev,
- struct device_opp *dev_opp)
+void opp_debug_unregister(struct opp_device *opp_dev,
+ struct opp_table *opp_table)
{
- if (list_dev->dentry == dev_opp->dentry) {
+ if (opp_dev->dentry == opp_table->dentry) {
/* Move the real dentry object under another device */
- if (!list_is_singular(&dev_opp->dev_list)) {
- opp_migrate_dentry(list_dev, dev_opp);
+ if (!list_is_singular(&opp_table->dev_list)) {
+ opp_migrate_dentry(opp_dev, opp_table);
goto out;
}
- dev_opp->dentry = NULL;
+ opp_table->dentry = NULL;
}
- debugfs_remove_recursive(list_dev->dentry);
+ debugfs_remove_recursive(opp_dev->dentry);
out:
- list_dev->dentry = NULL;
+ opp_dev->dentry = NULL;
}
static int __init opp_debug_init(void)
diff --git a/drivers/base/power/opp/opp.h b/drivers/base/power/opp/opp.h
index 690638ef36ee..f67f806fcf3a 100644
--- a/drivers/base/power/opp/opp.h
+++ b/drivers/base/power/opp/opp.h
@@ -22,13 +22,16 @@
#include <linux/rculist.h>
#include <linux/rcupdate.h>
+struct clk;
+struct regulator;
+
/* Lock to allow exclusive modification to the device and opp lists */
-extern struct mutex dev_opp_list_lock;
+extern struct mutex opp_table_lock;
/*
* Internal data structure organization with the OPP layer library is as
* follows:
- * dev_opp_list (root)
+ * opp_tables (root)
* |- device 1 (represents voltage domain 1)
* | |- opp 1 (availability, freq, voltage)
* | |- opp 2 ..
@@ -37,18 +40,18 @@ extern struct mutex dev_opp_list_lock;
* |- device 2 (represents the next voltage domain)
* ...
* `- device m (represents mth voltage domain)
- * device 1, 2.. are represented by dev_opp structure while each opp
+ * device 1, 2.. are represented by opp_table structure while each opp
* is represented by the opp structure.
*/
/**
* struct dev_pm_opp - Generic OPP description structure
- * @node: opp list node. The nodes are maintained throughout the lifetime
+ * @node: opp table node. The nodes are maintained throughout the lifetime
* of boot. It is expected only an optimal set of OPPs are
* added to the library by the SoC framework.
- * RCU usage: opp list is traversed with RCU locks. node
+ * RCU usage: opp table is traversed with RCU locks. node
* modification is possible realtime, hence the modifications
- * are protected by the dev_opp_list_lock for integrity.
+ * are protected by the opp_table_lock for integrity.
* IMPORTANT: the opp nodes should be maintained in increasing
* order.
* @available: true/false - marks if this OPP as available or not
@@ -62,7 +65,7 @@ extern struct mutex dev_opp_list_lock;
* @u_amp: Maximum current drawn by the device in microamperes
* @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
* frequency from any other OPP's frequency.
- * @dev_opp: points back to the device_opp struct this opp belongs to
+ * @opp_table: points back to the opp_table struct this opp belongs to
* @rcu_head: RCU callback head used for deferred freeing
* @np: OPP's device node.
* @dentry: debugfs dentry pointer (per opp)
@@ -84,7 +87,7 @@ struct dev_pm_opp {
unsigned long u_amp;
unsigned long clock_latency_ns;
- struct device_opp *dev_opp;
+ struct opp_table *opp_table;
struct rcu_head rcu_head;
struct device_node *np;
@@ -95,16 +98,16 @@ struct dev_pm_opp {
};
/**
- * struct device_list_opp - devices managed by 'struct device_opp'
+ * struct opp_device - devices managed by 'struct opp_table'
* @node: list node
* @dev: device to which the struct object belongs
* @rcu_head: RCU callback head used for deferred freeing
* @dentry: debugfs dentry pointer (per device)
*
- * This is an internal data structure maintaining the list of devices that are
- * managed by 'struct device_opp'.
+ * This is an internal data structure maintaining the devices that are managed
+ * by 'struct opp_table'.
*/
-struct device_list_opp {
+struct opp_device {
struct list_head node;
const struct device *dev;
struct rcu_head rcu_head;
@@ -115,16 +118,16 @@ struct device_list_opp {
};
/**
- * struct device_opp - Device opp structure
- * @node: list node - contains the devices with OPPs that
+ * struct opp_table - Device opp structure
+ * @node: table node - contains the devices with OPPs that
* have been registered. Nodes once added are not modified in this
- * list.
- * RCU usage: nodes are not modified in the list of device_opp,
- * however addition is possible and is secured by dev_opp_list_lock
+ * table.
+ * RCU usage: nodes are not modified in the table of opp_table,
+ * however addition is possible and is secured by opp_table_lock
* @srcu_head: notifier head to notify the OPP availability changes.
* @rcu_head: RCU callback head used for deferred freeing
* @dev_list: list of devices that share these OPPs
- * @opp_list: list of opps
+ * @opp_list: table of opps
* @np: struct device_node pointer for opp's DT node.
* @clock_latency_ns_max: Max clock latency in nanoseconds.
* @shared_opp: OPP is shared between multiple devices.
@@ -132,9 +135,13 @@ struct device_list_opp {
* @supported_hw: Array of version number to support.
* @supported_hw_count: Number of elements in supported_hw array.
* @prop_name: A name to postfix to many DT properties, while parsing them.
+ * @clk: Device's clock handle
+ * @regulator: Supply regulator
* @dentry: debugfs dentry pointer of the real device directory (not links).
* @dentry_name: Name of the real dentry.
*
+ * @voltage_tolerance_v1: In percentage, for v1 bindings only.
+ *
* This is an internal data structure maintaining the link to opps attached to
* a device. This structure is not meant to be shared to users as it is
* meant for book keeping and private to OPP library.
@@ -143,7 +150,7 @@ struct device_list_opp {
* need to wait for the grace period of both of them before freeing any
* resources. And so we have used kfree_rcu() from within call_srcu() handlers.
*/
-struct device_opp {
+struct opp_table {
struct list_head node;
struct srcu_notifier_head srcu_head;
@@ -153,12 +160,18 @@ struct device_opp {
struct device_node *np;
unsigned long clock_latency_ns_max;
+
+ /* For backward compatibility with v1 bindings */
+ unsigned int voltage_tolerance_v1;
+
bool shared_opp;
struct dev_pm_opp *suspend_opp;
unsigned int *supported_hw;
unsigned int supported_hw_count;
const char *prop_name;
+ struct clk *clk;
+ struct regulator *regulator;
#ifdef CONFIG_DEBUG_FS
struct dentry *dentry;
@@ -167,30 +180,27 @@ struct device_opp {
};
/* Routines internal to opp core */
-struct device_opp *_find_device_opp(struct device *dev);
-struct device_list_opp *_add_list_dev(const struct device *dev,
- struct device_opp *dev_opp);
+struct opp_table *_find_opp_table(struct device *dev);
+struct opp_device *_add_opp_dev(const struct device *dev, struct opp_table *opp_table);
struct device_node *_of_get_opp_desc_node(struct device *dev);
#ifdef CONFIG_DEBUG_FS
void opp_debug_remove_one(struct dev_pm_opp *opp);
-int opp_debug_create_one(struct dev_pm_opp *opp, struct device_opp *dev_opp);
-int opp_debug_register(struct device_list_opp *list_dev,
- struct device_opp *dev_opp);
-void opp_debug_unregister(struct device_list_opp *list_dev,
- struct device_opp *dev_opp);
+int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table);
+int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table);
+void opp_debug_unregister(struct opp_device *opp_dev, struct opp_table *opp_table);
#else
static inline void opp_debug_remove_one(struct dev_pm_opp *opp) {}
static inline int opp_debug_create_one(struct dev_pm_opp *opp,
- struct device_opp *dev_opp)
+ struct opp_table *opp_table)
{ return 0; }
-static inline int opp_debug_register(struct device_list_opp *list_dev,
- struct device_opp *dev_opp)
+static inline int opp_debug_register(struct opp_device *opp_dev,
+ struct opp_table *opp_table)
{ return 0; }
-static inline void opp_debug_unregister(struct device_list_opp *list_dev,
- struct device_opp *dev_opp)
+static inline void opp_debug_unregister(struct opp_device *opp_dev,
+ struct opp_table *opp_table)
{ }
#endif /* DEBUG_FS */
diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c
index a311cfa4c5bd..a6975795e7f3 100644
--- a/drivers/base/power/trace.c
+++ b/drivers/base/power/trace.c
@@ -166,14 +166,14 @@ void generate_pm_trace(const void *tracedata, unsigned int user)
}
EXPORT_SYMBOL(generate_pm_trace);
-extern char __tracedata_start, __tracedata_end;
+extern char __tracedata_start[], __tracedata_end[];
static int show_file_hash(unsigned int value)
{
int match;
char *tracedata;
match = 0;
- for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ;
+ for (tracedata = __tracedata_start ; tracedata < __tracedata_end ;
tracedata += 2 + sizeof(unsigned long)) {
unsigned short lineno = *(unsigned short *)tracedata;
const char *file = *(const char **)(tracedata + 2);
diff --git a/drivers/base/property.c b/drivers/base/property.c
index c359351d50f1..9b1a65debd49 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -218,7 +218,8 @@ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname)
bool ret;
ret = __fwnode_property_present(fwnode, propname);
- if (ret == false && fwnode && fwnode->secondary)
+ if (ret == false && !IS_ERR_OR_NULL(fwnode) &&
+ !IS_ERR_OR_NULL(fwnode->secondary))
ret = __fwnode_property_present(fwnode->secondary, propname);
return ret;
}
@@ -423,7 +424,8 @@ EXPORT_SYMBOL_GPL(device_property_match_string);
int _ret_; \
_ret_ = FWNODE_PROP_READ(_fwnode_, _propname_, _type_, _proptype_, \
_val_, _nval_); \
- if (_ret_ == -EINVAL && _fwnode_ && _fwnode_->secondary) \
+ if (_ret_ == -EINVAL && !IS_ERR_OR_NULL(_fwnode_) && \
+ !IS_ERR_OR_NULL(_fwnode_->secondary)) \
_ret_ = FWNODE_PROP_READ(_fwnode_->secondary, _propname_, _type_, \
_proptype_, _val_, _nval_); \
_ret_; \
@@ -593,7 +595,8 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
int ret;
ret = __fwnode_property_read_string_array(fwnode, propname, val, nval);
- if (ret == -EINVAL && fwnode && fwnode->secondary)
+ if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) &&
+ !IS_ERR_OR_NULL(fwnode->secondary))
ret = __fwnode_property_read_string_array(fwnode->secondary,
propname, val, nval);
return ret;
@@ -621,7 +624,8 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode,
int ret;
ret = __fwnode_property_read_string(fwnode, propname, val);
- if (ret == -EINVAL && fwnode && fwnode->secondary)
+ if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) &&
+ !IS_ERR_OR_NULL(fwnode->secondary))
ret = __fwnode_property_read_string(fwnode->secondary,
propname, val);
return ret;
@@ -647,7 +651,7 @@ int fwnode_property_match_string(struct fwnode_handle *fwnode,
const char *propname, const char *string)
{
const char **values;
- int nval, ret, i;
+ int nval, ret;
nval = fwnode_property_read_string_array(fwnode, propname, NULL, 0);
if (nval < 0)
@@ -664,13 +668,9 @@ int fwnode_property_match_string(struct fwnode_handle *fwnode,
if (ret < 0)
goto out;
- ret = -ENODATA;
- for (i = 0; i < nval; i++) {
- if (!strcmp(values[i], string)) {
- ret = i;
- break;
- }
- }
+ ret = match_string(values, nval, string);
+ if (ret < 0)
+ ret = -ENODATA;
out:
kfree(values);
return ret;
@@ -820,11 +820,16 @@ void device_remove_property_set(struct device *dev)
* the pset. If there is no real firmware node (ACPI/DT) primary
* will hold the pset.
*/
- if (!is_pset_node(fwnode))
- fwnode = fwnode->secondary;
- if (!IS_ERR(fwnode) && is_pset_node(fwnode))
+ if (is_pset_node(fwnode)) {
+ set_primary_fwnode(dev, NULL);
pset_free_set(to_pset_node(fwnode));
- set_secondary_fwnode(dev, NULL);
+ } else {
+ fwnode = fwnode->secondary;
+ if (!IS_ERR(fwnode) && is_pset_node(fwnode)) {
+ set_secondary_fwnode(dev, NULL);
+ pset_free_set(to_pset_node(fwnode));
+ }
+ }
}
EXPORT_SYMBOL_GPL(device_remove_property_set);
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 3df977054781..5c79526245c2 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -110,6 +110,7 @@ struct regmap {
/* number of bits to (left) shift the reg value when formatting*/
int reg_shift;
int reg_stride;
+ int reg_stride_order;
/* regcache specific members */
const struct regcache_ops *cache_ops;
@@ -263,4 +264,19 @@ static inline const char *regmap_name(const struct regmap *map)
return map->name;
}
+static inline unsigned int regmap_get_offset(const struct regmap *map,
+ unsigned int index)
+{
+ if (map->reg_stride_order >= 0)
+ return index << map->reg_stride_order;
+ else
+ return index * map->reg_stride;
+}
+
+static inline unsigned int regcache_get_index_by_order(const struct regmap *map,
+ unsigned int reg)
+{
+ return reg >> map->reg_stride_order;
+}
+
#endif
diff --git a/drivers/base/regmap/regcache-flat.c b/drivers/base/regmap/regcache-flat.c
index 686c9e0b930e..3ee72550b1e3 100644
--- a/drivers/base/regmap/regcache-flat.c
+++ b/drivers/base/regmap/regcache-flat.c
@@ -16,20 +16,30 @@
#include "internal.h"
+static inline unsigned int regcache_flat_get_index(const struct regmap *map,
+ unsigned int reg)
+{
+ return regcache_get_index_by_order(map, reg);
+}
+
static int regcache_flat_init(struct regmap *map)
{
int i;
unsigned int *cache;
- map->cache = kcalloc(map->max_register + 1, sizeof(unsigned int),
- GFP_KERNEL);
+ if (!map || map->reg_stride_order < 0)
+ return -EINVAL;
+
+ map->cache = kcalloc(regcache_flat_get_index(map, map->max_register)
+ + 1, sizeof(unsigned int), GFP_KERNEL);
if (!map->cache)
return -ENOMEM;
cache = map->cache;
for (i = 0; i < map->num_reg_defaults; i++)
- cache[map->reg_defaults[i].reg] = map->reg_defaults[i].def;
+ cache[regcache_flat_get_index(map, map->reg_defaults[i].reg)] =
+ map->reg_defaults[i].def;
return 0;
}
@@ -47,7 +57,7 @@ static int regcache_flat_read(struct regmap *map,
{
unsigned int *cache = map->cache;
- *value = cache[reg];
+ *value = cache[regcache_flat_get_index(map, reg)];
return 0;
}
@@ -57,7 +67,7 @@ static int regcache_flat_write(struct regmap *map, unsigned int reg,
{
unsigned int *cache = map->cache;
- cache[reg] = value;
+ cache[regcache_flat_get_index(map, reg)] = value;
return 0;
}
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 348be3a35410..4170b7d95276 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -30,7 +30,7 @@ static int regcache_hw_init(struct regmap *map)
int i, j;
int ret;
int count;
- unsigned int val;
+ unsigned int reg, val;
void *tmp_buf;
if (!map->num_reg_defaults_raw)
@@ -57,7 +57,7 @@ static int regcache_hw_init(struct regmap *map)
bool cache_bypass = map->cache_bypass;
dev_warn(map->dev, "No cache defaults, reading back from HW\n");
- /* Bypass the cache access till data read from HW*/
+ /* Bypass the cache access till data read from HW */
map->cache_bypass = true;
tmp_buf = kmalloc(map->cache_size_raw, GFP_KERNEL);
if (!tmp_buf) {
@@ -65,29 +65,48 @@ static int regcache_hw_init(struct regmap *map)
goto err_free;
}
ret = regmap_raw_read(map, 0, tmp_buf,
- map->num_reg_defaults_raw);
+ map->cache_size_raw);
map->cache_bypass = cache_bypass;
- if (ret < 0)
- goto err_cache_free;
-
- map->reg_defaults_raw = tmp_buf;
- map->cache_free = 1;
+ if (ret == 0) {
+ map->reg_defaults_raw = tmp_buf;
+ map->cache_free = 1;
+ } else {
+ kfree(tmp_buf);
+ }
}
/* fill the reg_defaults */
for (i = 0, j = 0; i < map->num_reg_defaults_raw; i++) {
- if (regmap_volatile(map, i * map->reg_stride))
+ reg = i * map->reg_stride;
+
+ if (!regmap_readable(map, reg))
continue;
- val = regcache_get_val(map, map->reg_defaults_raw, i);
- map->reg_defaults[j].reg = i * map->reg_stride;
+
+ if (regmap_volatile(map, reg))
+ continue;
+
+ if (map->reg_defaults_raw) {
+ val = regcache_get_val(map, map->reg_defaults_raw, i);
+ } else {
+ bool cache_bypass = map->cache_bypass;
+
+ map->cache_bypass = true;
+ ret = regmap_read(map, reg, &val);
+ map->cache_bypass = cache_bypass;
+ if (ret != 0) {
+ dev_err(map->dev, "Failed to read %d: %d\n",
+ reg, ret);
+ goto err_free;
+ }
+ }
+
+ map->reg_defaults[j].reg = reg;
map->reg_defaults[j].def = val;
j++;
}
return 0;
-err_cache_free:
- kfree(tmp_buf);
err_free:
kfree(map->reg_defaults);
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 9b0d202414d0..26f799e71c82 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -379,6 +379,7 @@ static int regmap_irq_map(struct irq_domain *h, unsigned int virq,
irq_set_chip_data(virq, data);
irq_set_chip(virq, &data->irq_chip);
irq_set_nested_thread(virq, 1);
+ irq_set_parent(virq, data->irq);
irq_set_noprobe(virq);
return 0;
@@ -655,13 +656,34 @@ EXPORT_SYMBOL_GPL(regmap_add_irq_chip);
*
* @irq: Primary IRQ for the device
* @d: regmap_irq_chip_data allocated by regmap_add_irq_chip()
+ *
+ * This function also dispose all mapped irq on chip.
*/
void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *d)
{
+ unsigned int virq;
+ int hwirq;
+
if (!d)
return;
free_irq(irq, d);
+
+ /* Dispose all virtual irq from irq domain before removing it */
+ for (hwirq = 0; hwirq < d->chip->num_irqs; hwirq++) {
+ /* Ignore hwirq if holes in the IRQ list */
+ if (!d->chip->irqs[hwirq].mask)
+ continue;
+
+ /*
+ * Find the virtual irq of hwirq on chip and if it is
+ * there then dispose it
+ */
+ virq = irq_find_mapping(d->domain, hwirq);
+ if (virq)
+ irq_dispose_mapping(virq);
+ }
+
irq_domain_remove(d->domain);
kfree(d->type_buf);
kfree(d->type_buf_def);
@@ -674,6 +696,88 @@ void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *d)
}
EXPORT_SYMBOL_GPL(regmap_del_irq_chip);
+static void devm_regmap_irq_chip_release(struct device *dev, void *res)
+{
+ struct regmap_irq_chip_data *d = *(struct regmap_irq_chip_data **)res;
+
+ regmap_del_irq_chip(d->irq, d);
+}
+
+static int devm_regmap_irq_chip_match(struct device *dev, void *res, void *data)
+
+{
+ struct regmap_irq_chip_data **r = res;
+
+ if (!r || !*r) {
+ WARN_ON(!r || !*r);
+ return 0;
+ }
+ return *r == data;
+}
+
+/**
+ * devm_regmap_add_irq_chip(): Resource manager regmap_add_irq_chip()
+ *
+ * @dev: The device pointer on which irq_chip belongs to.
+ * @map: The regmap for the device.
+ * @irq: The IRQ the device uses to signal interrupts
+ * @irq_flags: The IRQF_ flags to use for the primary interrupt.
+ * @chip: Configuration for the interrupt controller.
+ * @data: Runtime data structure for the controller, allocated on success
+ *
+ * Returns 0 on success or an errno on failure.
+ *
+ * The regmap_irq_chip data automatically be released when the device is
+ * unbound.
+ */
+int devm_regmap_add_irq_chip(struct device *dev, struct regmap *map, int irq,
+ int irq_flags, int irq_base,
+ const struct regmap_irq_chip *chip,
+ struct regmap_irq_chip_data **data)
+{
+ struct regmap_irq_chip_data **ptr, *d;
+ int ret;
+
+ ptr = devres_alloc(devm_regmap_irq_chip_release, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return -ENOMEM;
+
+ ret = regmap_add_irq_chip(map, irq, irq_flags, irq_base,
+ chip, &d);
+ if (ret < 0) {
+ devres_free(ptr);
+ return ret;
+ }
+
+ *ptr = d;
+ devres_add(dev, ptr);
+ *data = d;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_regmap_add_irq_chip);
+
+/**
+ * devm_regmap_del_irq_chip(): Resource managed regmap_del_irq_chip()
+ *
+ * @dev: Device for which which resource was allocated.
+ * @irq: Primary IRQ for the device
+ * @d: regmap_irq_chip_data allocated by regmap_add_irq_chip()
+ */
+void devm_regmap_del_irq_chip(struct device *dev, int irq,
+ struct regmap_irq_chip_data *data)
+{
+ int rc;
+
+ WARN_ON(irq != data->irq);
+ rc = devres_release(dev, devm_regmap_irq_chip_release,
+ devm_regmap_irq_chip_match, data);
+
+ if (rc != 0)
+ WARN_ON(rc);
+}
+EXPORT_SYMBOL_GPL(devm_regmap_del_irq_chip);
+
/**
* regmap_irq_chip_get_base(): Retrieve interrupt base for a regmap IRQ chip
*
diff --git a/drivers/base/regmap/regmap-mmio.c b/drivers/base/regmap/regmap-mmio.c
index eea51569f0eb..7526906ca080 100644
--- a/drivers/base/regmap/regmap-mmio.c
+++ b/drivers/base/regmap/regmap-mmio.c
@@ -25,26 +25,14 @@
struct regmap_mmio_context {
void __iomem *regs;
- unsigned reg_bytes;
unsigned val_bytes;
- unsigned pad_bytes;
struct clk *clk;
-};
-static inline void regmap_mmio_regsize_check(size_t reg_size)
-{
- switch (reg_size) {
- case 1:
- case 2:
- case 4:
-#ifdef CONFIG_64BIT
- case 8:
-#endif
- break;
- default:
- BUG();
- }
-}
+ void (*reg_write)(struct regmap_mmio_context *ctx,
+ unsigned int reg, unsigned int val);
+ unsigned int (*reg_read)(struct regmap_mmio_context *ctx,
+ unsigned int reg);
+};
static int regmap_mmio_regbits_check(size_t reg_bits)
{
@@ -88,72 +76,62 @@ static int regmap_mmio_get_min_stride(size_t val_bits)
return min_stride;
}
-static inline void regmap_mmio_count_check(size_t count, u32 offset)
+static void regmap_mmio_write8(struct regmap_mmio_context *ctx,
+ unsigned int reg,
+ unsigned int val)
+{
+ writeb(val, ctx->regs + reg);
+}
+
+static void regmap_mmio_write16le(struct regmap_mmio_context *ctx,
+ unsigned int reg,
+ unsigned int val)
{
- BUG_ON(count <= offset);
+ writew(val, ctx->regs + reg);
}
-static inline unsigned int
-regmap_mmio_get_offset(const void *reg, size_t reg_size)
+static void regmap_mmio_write16be(struct regmap_mmio_context *ctx,
+ unsigned int reg,
+ unsigned int val)
{
- switch (reg_size) {
- case 1:
- return *(u8 *)reg;
- case 2:
- return *(u16 *)reg;
- case 4:
- return *(u32 *)reg;
+ iowrite16be(val, ctx->regs + reg);
+}
+
+static void regmap_mmio_write32le(struct regmap_mmio_context *ctx,
+ unsigned int reg,
+ unsigned int val)
+{
+ writel(val, ctx->regs + reg);
+}
+
+static void regmap_mmio_write32be(struct regmap_mmio_context *ctx,
+ unsigned int reg,
+ unsigned int val)
+{
+ iowrite32be(val, ctx->regs + reg);
+}
+
#ifdef CONFIG_64BIT
- case 8:
- return *(u64 *)reg;
-#endif
- default:
- BUG();
- }
+static void regmap_mmio_write64le(struct regmap_mmio_context *ctx,
+ unsigned int reg,
+ unsigned int val)
+{
+ writeq(val, ctx->regs + reg);
}
+#endif
-static int regmap_mmio_gather_write(void *context,
- const void *reg, size_t reg_size,
- const void *val, size_t val_size)
+static int regmap_mmio_write(void *context, unsigned int reg, unsigned int val)
{
struct regmap_mmio_context *ctx = context;
- unsigned int offset;
int ret;
- regmap_mmio_regsize_check(reg_size);
-
if (!IS_ERR(ctx->clk)) {
ret = clk_enable(ctx->clk);
if (ret < 0)
return ret;
}
- offset = regmap_mmio_get_offset(reg, reg_size);
-
- while (val_size) {
- switch (ctx->val_bytes) {
- case 1:
- writeb(*(u8 *)val, ctx->regs + offset);
- break;
- case 2:
- writew(*(u16 *)val, ctx->regs + offset);
- break;
- case 4:
- writel(*(u32 *)val, ctx->regs + offset);
- break;
-#ifdef CONFIG_64BIT
- case 8:
- writeq(*(u64 *)val, ctx->regs + offset);
- break;
-#endif
- default:
- /* Should be caught by regmap_mmio_check_config */
- BUG();
- }
- val_size -= ctx->val_bytes;
- val += ctx->val_bytes;
- offset += ctx->val_bytes;
- }
+ ctx->reg_write(ctx, reg, val);
if (!IS_ERR(ctx->clk))
clk_disable(ctx->clk);
@@ -161,59 +139,56 @@ static int regmap_mmio_gather_write(void *context,
return 0;
}
-static int regmap_mmio_write(void *context, const void *data, size_t count)
+static unsigned int regmap_mmio_read8(struct regmap_mmio_context *ctx,
+ unsigned int reg)
{
- struct regmap_mmio_context *ctx = context;
- unsigned int offset = ctx->reg_bytes + ctx->pad_bytes;
+ return readb(ctx->regs + reg);
+}
+
+static unsigned int regmap_mmio_read16le(struct regmap_mmio_context *ctx,
+ unsigned int reg)
+{
+ return readw(ctx->regs + reg);
+}
+
+static unsigned int regmap_mmio_read16be(struct regmap_mmio_context *ctx,
+ unsigned int reg)
+{
+ return ioread16be(ctx->regs + reg);
+}
+
+static unsigned int regmap_mmio_read32le(struct regmap_mmio_context *ctx,
+ unsigned int reg)
+{
+ return readl(ctx->regs + reg);
+}
- regmap_mmio_count_check(count, offset);
+static unsigned int regmap_mmio_read32be(struct regmap_mmio_context *ctx,
+ unsigned int reg)
+{
+ return ioread32be(ctx->regs + reg);
+}
- return regmap_mmio_gather_write(context, data, ctx->reg_bytes,
- data + offset, count - offset);
+#ifdef CONFIG_64BIT
+static unsigned int regmap_mmio_read64le(struct regmap_mmio_context *ctx,
+ unsigned int reg)
+{
+ return readq(ctx->regs + reg);
}
+#endif
-static int regmap_mmio_read(void *context,
- const void *reg, size_t reg_size,
- void *val, size_t val_size)
+static int regmap_mmio_read(void *context, unsigned int reg, unsigned int *val)
{
struct regmap_mmio_context *ctx = context;
- unsigned int offset;
int ret;
- regmap_mmio_regsize_check(reg_size);
-
if (!IS_ERR(ctx->clk)) {
ret = clk_enable(ctx->clk);
if (ret < 0)
return ret;
}
- offset = regmap_mmio_get_offset(reg, reg_size);
-
- while (val_size) {
- switch (ctx->val_bytes) {
- case 1:
- *(u8 *)val = readb(ctx->regs + offset);
- break;
- case 2:
- *(u16 *)val = readw(ctx->regs + offset);
- break;
- case 4:
- *(u32 *)val = readl(ctx->regs + offset);
- break;
-#ifdef CONFIG_64BIT
- case 8:
- *(u64 *)val = readq(ctx->regs + offset);
- break;
-#endif
- default:
- /* Should be caught by regmap_mmio_check_config */
- BUG();
- }
- val_size -= ctx->val_bytes;
- val += ctx->val_bytes;
- offset += ctx->val_bytes;
- }
+ *val = ctx->reg_read(ctx, reg);
if (!IS_ERR(ctx->clk))
clk_disable(ctx->clk);
@@ -232,14 +207,11 @@ static void regmap_mmio_free_context(void *context)
kfree(context);
}
-static struct regmap_bus regmap_mmio = {
+static const struct regmap_bus regmap_mmio = {
.fast_io = true,
- .write = regmap_mmio_write,
- .gather_write = regmap_mmio_gather_write,
- .read = regmap_mmio_read,
+ .reg_write = regmap_mmio_write,
+ .reg_read = regmap_mmio_read,
.free_context = regmap_mmio_free_context,
- .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
- .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
};
static struct regmap_mmio_context *regmap_mmio_gen_context(struct device *dev,
@@ -265,24 +237,71 @@ static struct regmap_mmio_context *regmap_mmio_gen_context(struct device *dev,
if (config->reg_stride < min_stride)
return ERR_PTR(-EINVAL);
- switch (config->reg_format_endian) {
- case REGMAP_ENDIAN_DEFAULT:
- case REGMAP_ENDIAN_NATIVE:
- break;
- default:
- return ERR_PTR(-EINVAL);
- }
-
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return ERR_PTR(-ENOMEM);
ctx->regs = regs;
ctx->val_bytes = config->val_bits / 8;
- ctx->reg_bytes = config->reg_bits / 8;
- ctx->pad_bytes = config->pad_bits / 8;
ctx->clk = ERR_PTR(-ENODEV);
+ switch (config->reg_format_endian) {
+ case REGMAP_ENDIAN_DEFAULT:
+ case REGMAP_ENDIAN_LITTLE:
+#ifdef __LITTLE_ENDIAN
+ case REGMAP_ENDIAN_NATIVE:
+#endif
+ switch (config->val_bits) {
+ case 8:
+ ctx->reg_read = regmap_mmio_read8;
+ ctx->reg_write = regmap_mmio_write8;
+ break;
+ case 16:
+ ctx->reg_read = regmap_mmio_read16le;
+ ctx->reg_write = regmap_mmio_write16le;
+ break;
+ case 32:
+ ctx->reg_read = regmap_mmio_read32le;
+ ctx->reg_write = regmap_mmio_write32le;
+ break;
+#ifdef CONFIG_64BIT
+ case 64:
+ ctx->reg_read = regmap_mmio_read64le;
+ ctx->reg_write = regmap_mmio_write64le;
+ break;
+#endif
+ default:
+ ret = -EINVAL;
+ goto err_free;
+ }
+ break;
+ case REGMAP_ENDIAN_BIG:
+#ifdef __BIG_ENDIAN
+ case REGMAP_ENDIAN_NATIVE:
+#endif
+ switch (config->val_bits) {
+ case 8:
+ ctx->reg_read = regmap_mmio_read8;
+ ctx->reg_write = regmap_mmio_write8;
+ break;
+ case 16:
+ ctx->reg_read = regmap_mmio_read16be;
+ ctx->reg_write = regmap_mmio_write16be;
+ break;
+ case 32:
+ ctx->reg_read = regmap_mmio_read32be;
+ ctx->reg_write = regmap_mmio_write32be;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_free;
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_free;
+ }
+
if (clk_id == NULL)
return ctx;
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ee54e841de4a..df2d2ef5d6b3 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -19,6 +19,7 @@
#include <linux/rbtree.h>
#include <linux/sched.h>
#include <linux/delay.h>
+#include <linux/log2.h>
#define CREATE_TRACE_POINTS
#include "trace.h"
@@ -557,6 +558,8 @@ enum regmap_endian regmap_get_val_endian(struct device *dev,
endian = REGMAP_ENDIAN_BIG;
else if (of_property_read_bool(np, "little-endian"))
endian = REGMAP_ENDIAN_LITTLE;
+ else if (of_property_read_bool(np, "native-endian"))
+ endian = REGMAP_ENDIAN_NATIVE;
/* If the endianness was specified in DT, use that */
if (endian != REGMAP_ENDIAN_DEFAULT)
@@ -638,6 +641,10 @@ struct regmap *__regmap_init(struct device *dev,
map->reg_stride = config->reg_stride;
else
map->reg_stride = 1;
+ if (is_power_of_2(map->reg_stride))
+ map->reg_stride_order = ilog2(map->reg_stride);
+ else
+ map->reg_stride_order = -1;
map->use_single_read = config->use_single_rw || !bus || !bus->read;
map->use_single_write = config->use_single_rw || !bus || !bus->write;
map->can_multi_write = config->can_multi_write && bus && bus->write;
@@ -1308,7 +1315,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
if (map->writeable_reg)
for (i = 0; i < val_len / map->format.val_bytes; i++)
if (!map->writeable_reg(map->dev,
- reg + (i * map->reg_stride)))
+ reg + regmap_get_offset(map, i)))
return -EINVAL;
if (!map->cache_bypass && map->format.parse_val) {
@@ -1316,7 +1323,8 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
int val_bytes = map->format.val_bytes;
for (i = 0; i < val_len / val_bytes; i++) {
ival = map->format.parse_val(val + (i * val_bytes));
- ret = regcache_write(map, reg + (i * map->reg_stride),
+ ret = regcache_write(map,
+ reg + regmap_get_offset(map, i),
ival);
if (ret) {
dev_err(map->dev,
@@ -1690,100 +1698,63 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
EXPORT_SYMBOL_GPL(regmap_raw_write);
/**
- * regmap_field_write(): Write a value to a single register field
- *
- * @field: Register field to write to
- * @val: Value to be written
- *
- * A value of zero will be returned on success, a negative errno will
- * be returned in error cases.
- */
-int regmap_field_write(struct regmap_field *field, unsigned int val)
-{
- return regmap_update_bits(field->regmap, field->reg,
- field->mask, val << field->shift);
-}
-EXPORT_SYMBOL_GPL(regmap_field_write);
-
-/**
- * regmap_field_update_bits(): Perform a read/modify/write cycle
- * on the register field
+ * regmap_field_update_bits_base():
+ * Perform a read/modify/write cycle on the register field
+ * with change, async, force option
*
* @field: Register field to write to
* @mask: Bitmask to change
* @val: Value to be written
+ * @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
*
* A value of zero will be returned on success, a negative errno will
* be returned in error cases.
*/
-int regmap_field_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val)
+int regmap_field_update_bits_base(struct regmap_field *field,
+ unsigned int mask, unsigned int val,
+ bool *change, bool async, bool force)
{
mask = (mask << field->shift) & field->mask;
- return regmap_update_bits(field->regmap, field->reg,
- mask, val << field->shift);
+ return regmap_update_bits_base(field->regmap, field->reg,
+ mask, val << field->shift,
+ change, async, force);
}
-EXPORT_SYMBOL_GPL(regmap_field_update_bits);
+EXPORT_SYMBOL_GPL(regmap_field_update_bits_base);
/**
- * regmap_fields_write(): Write a value to a single register field with port ID
- *
- * @field: Register field to write to
- * @id: port ID
- * @val: Value to be written
- *
- * A value of zero will be returned on success, a negative errno will
- * be returned in error cases.
- */
-int regmap_fields_write(struct regmap_field *field, unsigned int id,
- unsigned int val)
-{
- if (id >= field->id_size)
- return -EINVAL;
-
- return regmap_update_bits(field->regmap,
- field->reg + (field->id_offset * id),
- field->mask, val << field->shift);
-}
-EXPORT_SYMBOL_GPL(regmap_fields_write);
-
-int regmap_fields_force_write(struct regmap_field *field, unsigned int id,
- unsigned int val)
-{
- if (id >= field->id_size)
- return -EINVAL;
-
- return regmap_write_bits(field->regmap,
- field->reg + (field->id_offset * id),
- field->mask, val << field->shift);
-}
-EXPORT_SYMBOL_GPL(regmap_fields_force_write);
-
-/**
- * regmap_fields_update_bits(): Perform a read/modify/write cycle
- * on the register field
+ * regmap_fields_update_bits_base():
+ * Perform a read/modify/write cycle on the register field
+ * with change, async, force option
*
* @field: Register field to write to
* @id: port ID
* @mask: Bitmask to change
* @val: Value to be written
+ * @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
*
* A value of zero will be returned on success, a negative errno will
* be returned in error cases.
*/
-int regmap_fields_update_bits(struct regmap_field *field, unsigned int id,
- unsigned int mask, unsigned int val)
+int regmap_fields_update_bits_base(struct regmap_field *field, unsigned int id,
+ unsigned int mask, unsigned int val,
+ bool *change, bool async, bool force)
{
if (id >= field->id_size)
return -EINVAL;
mask = (mask << field->shift) & field->mask;
- return regmap_update_bits(field->regmap,
- field->reg + (field->id_offset * id),
- mask, val << field->shift);
+ return regmap_update_bits_base(field->regmap,
+ field->reg + (field->id_offset * id),
+ mask, val << field->shift,
+ change, async, force);
}
-EXPORT_SYMBOL_GPL(regmap_fields_update_bits);
+EXPORT_SYMBOL_GPL(regmap_fields_update_bits_base);
/*
* regmap_bulk_write(): Write multiple registers to the device
@@ -1846,8 +1817,9 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
goto out;
}
- ret = _regmap_write(map, reg + (i * map->reg_stride),
- ival);
+ ret = _regmap_write(map,
+ reg + regmap_get_offset(map, i),
+ ival);
if (ret != 0)
goto out;
}
@@ -2253,6 +2225,9 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
WARN_ON(!map->bus);
+ if (!map->bus || !map->bus->read)
+ return -EINVAL;
+
range = _regmap_range_lookup(map, reg);
if (range) {
ret = _regmap_select_page(map, &reg, range,
@@ -2416,7 +2391,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
* cost as we expect to hit the cache.
*/
for (i = 0; i < val_count; i++) {
- ret = _regmap_read(map, reg + (i * map->reg_stride),
+ ret = _regmap_read(map, reg + regmap_get_offset(map, i),
&v);
if (ret != 0)
goto out;
@@ -2568,7 +2543,7 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
} else {
for (i = 0; i < val_count; i++) {
unsigned int ival;
- ret = regmap_read(map, reg + (i * map->reg_stride),
+ ret = regmap_read(map, reg + regmap_get_offset(map, i),
&ival);
if (ret != 0)
return ret;
@@ -2648,138 +2623,36 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
}
/**
- * regmap_update_bits: Perform a read/modify/write cycle on the register map
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_update_bits(struct regmap *map, unsigned int reg,
- unsigned int mask, unsigned int val)
-{
- int ret;
-
- map->lock(map->lock_arg);
- ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
- map->unlock(map->lock_arg);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_update_bits);
-
-/**
- * regmap_write_bits: Perform a read/modify/write cycle on the register map
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_write_bits(struct regmap *map, unsigned int reg,
- unsigned int mask, unsigned int val)
-{
- int ret;
-
- map->lock(map->lock_arg);
- ret = _regmap_update_bits(map, reg, mask, val, NULL, true);
- map->unlock(map->lock_arg);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_write_bits);
-
-/**
- * regmap_update_bits_async: Perform a read/modify/write cycle on the register
- * map asynchronously
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- *
- * With most buses the read must be done synchronously so this is most
- * useful for devices with a cache which do not need to interact with
- * the hardware to determine the current register value.
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_update_bits_async(struct regmap *map, unsigned int reg,
- unsigned int mask, unsigned int val)
-{
- int ret;
-
- map->lock(map->lock_arg);
-
- map->async = true;
-
- ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
-
- map->async = false;
-
- map->unlock(map->lock_arg);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_update_bits_async);
-
-/**
- * regmap_update_bits_check: Perform a read/modify/write cycle on the
- * register map and report if updated
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- * @change: Boolean indicating if a write was done
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_update_bits_check(struct regmap *map, unsigned int reg,
- unsigned int mask, unsigned int val,
- bool *change)
-{
- int ret;
-
- map->lock(map->lock_arg);
- ret = _regmap_update_bits(map, reg, mask, val, change, false);
- map->unlock(map->lock_arg);
- return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_update_bits_check);
-
-/**
- * regmap_update_bits_check_async: Perform a read/modify/write cycle on the
- * register map asynchronously and report if
- * updated
+ * regmap_update_bits_base:
+ * Perform a read/modify/write cycle on the
+ * register map with change, async, force option
*
* @map: Register map to update
* @reg: Register to update
* @mask: Bitmask to change
* @val: New value for bitmask
* @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
*
+ * if async was true,
* With most buses the read must be done synchronously so this is most
* useful for devices with a cache which do not need to interact with
* the hardware to determine the current register value.
*
* Returns zero for success, a negative number on error.
*/
-int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
- unsigned int mask, unsigned int val,
- bool *change)
+int regmap_update_bits_base(struct regmap *map, unsigned int reg,
+ unsigned int mask, unsigned int val,
+ bool *change, bool async, bool force)
{
int ret;
map->lock(map->lock_arg);
- map->async = true;
+ map->async = async;
- ret = _regmap_update_bits(map, reg, mask, val, change, false);
+ ret = _regmap_update_bits(map, reg, mask, val, change, force);
map->async = false;
@@ -2787,7 +2660,7 @@ int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
return ret;
}
-EXPORT_SYMBOL_GPL(regmap_update_bits_check_async);
+EXPORT_SYMBOL_GPL(regmap_update_bits_base);
void regmap_async_complete_cb(struct regmap_async *async, int ret)
{
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.