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-rw-r--r--drivers/base/bus.c82
-rw-r--r--drivers/base/class.c29
-rw-r--r--drivers/base/core.c102
-rw-r--r--drivers/base/cpu.c39
-rw-r--r--drivers/base/dd.c2
-rw-r--r--drivers/base/devres.c31
-rw-r--r--drivers/base/devtmpfs.c6
-rw-r--r--drivers/base/dma-buf.c32
-rw-r--r--drivers/base/dma-contiguous.c119
-rw-r--r--drivers/base/firmware_class.c38
-rw-r--r--drivers/base/memory.c7
-rw-r--r--drivers/base/node.c6
-rw-r--r--drivers/base/platform.c17
-rw-r--r--drivers/base/power/main.c77
-rw-r--r--drivers/base/power/opp.c115
-rw-r--r--drivers/base/power/runtime.c5
-rw-r--r--drivers/base/regmap/Kconfig5
-rw-r--r--drivers/base/regmap/Makefile1
-rw-r--r--drivers/base/regmap/internal.h8
-rw-r--r--drivers/base/regmap/regcache.c19
-rw-r--r--drivers/base/regmap/regmap-debugfs.c57
-rw-r--r--drivers/base/regmap/regmap-irq.c16
-rw-r--r--drivers/base/regmap/regmap-spi.c3
-rw-r--r--drivers/base/regmap/regmap-spmi.c90
-rw-r--r--drivers/base/regmap/regmap.c366
25 files changed, 836 insertions, 436 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 4c289ab91357..73f6c2925281 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -591,37 +591,6 @@ void bus_remove_device(struct device *dev)
bus_put(dev->bus);
}
-static int driver_add_attrs(struct bus_type *bus, struct device_driver *drv)
-{
- int error = 0;
- int i;
-
- if (bus->drv_attrs) {
- for (i = 0; bus->drv_attrs[i].attr.name; i++) {
- error = driver_create_file(drv, &bus->drv_attrs[i]);
- if (error)
- goto err;
- }
- }
-done:
- return error;
-err:
- while (--i >= 0)
- driver_remove_file(drv, &bus->drv_attrs[i]);
- goto done;
-}
-
-static void driver_remove_attrs(struct bus_type *bus,
- struct device_driver *drv)
-{
- int i;
-
- if (bus->drv_attrs) {
- for (i = 0; bus->drv_attrs[i].attr.name; i++)
- driver_remove_file(drv, &bus->drv_attrs[i]);
- }
-}
-
static int __must_check add_bind_files(struct device_driver *drv)
{
int ret;
@@ -720,16 +689,12 @@ int bus_add_driver(struct device_driver *drv)
printk(KERN_ERR "%s: uevent attr (%s) failed\n",
__func__, drv->name);
}
- error = driver_add_attrs(bus, drv);
+ error = driver_add_groups(drv, bus->drv_groups);
if (error) {
/* How the hell do we get out of this pickle? Give up */
- printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
- __func__, drv->name);
- }
- error = driver_add_groups(drv, bus->drv_groups);
- if (error)
printk(KERN_ERR "%s: driver_create_groups(%s) failed\n",
__func__, drv->name);
+ }
if (!drv->suppress_bind_attrs) {
error = add_bind_files(drv);
@@ -766,7 +731,6 @@ void bus_remove_driver(struct device_driver *drv)
if (!drv->suppress_bind_attrs)
remove_bind_files(drv);
- driver_remove_attrs(drv->bus, drv);
driver_remove_groups(drv, drv->bus->drv_groups);
driver_remove_file(drv, &driver_attr_uevent);
klist_remove(&drv->p->knode_bus);
@@ -846,42 +810,6 @@ struct bus_type *find_bus(char *name)
}
#endif /* 0 */
-
-/**
- * bus_add_attrs - Add default attributes for this bus.
- * @bus: Bus that has just been registered.
- */
-
-static int bus_add_attrs(struct bus_type *bus)
-{
- int error = 0;
- int i;
-
- if (bus->bus_attrs) {
- for (i = 0; bus->bus_attrs[i].attr.name; i++) {
- error = bus_create_file(bus, &bus->bus_attrs[i]);
- if (error)
- goto err;
- }
- }
-done:
- return error;
-err:
- while (--i >= 0)
- bus_remove_file(bus, &bus->bus_attrs[i]);
- goto done;
-}
-
-static void bus_remove_attrs(struct bus_type *bus)
-{
- int i;
-
- if (bus->bus_attrs) {
- for (i = 0; bus->bus_attrs[i].attr.name; i++)
- bus_remove_file(bus, &bus->bus_attrs[i]);
- }
-}
-
static int bus_add_groups(struct bus_type *bus,
const struct attribute_group **groups)
{
@@ -983,9 +911,6 @@ int bus_register(struct bus_type *bus)
if (retval)
goto bus_probe_files_fail;
- retval = bus_add_attrs(bus);
- if (retval)
- goto bus_attrs_fail;
retval = bus_add_groups(bus, bus->bus_groups);
if (retval)
goto bus_groups_fail;
@@ -994,8 +919,6 @@ int bus_register(struct bus_type *bus)
return 0;
bus_groups_fail:
- bus_remove_attrs(bus);
-bus_attrs_fail:
remove_probe_files(bus);
bus_probe_files_fail:
kset_unregister(bus->p->drivers_kset);
@@ -1024,7 +947,6 @@ void bus_unregister(struct bus_type *bus)
pr_debug("bus: '%s': unregistering\n", bus->name);
if (bus->dev_root)
device_unregister(bus->dev_root);
- bus_remove_attrs(bus);
bus_remove_groups(bus, bus->bus_groups);
remove_probe_files(bus);
kset_unregister(bus->p->drivers_kset);
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 8b7818b80056..f96f70419a78 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -47,18 +47,6 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
return ret;
}
-static const void *class_attr_namespace(struct kobject *kobj,
- const struct attribute *attr)
-{
- struct class_attribute *class_attr = to_class_attr(attr);
- struct subsys_private *cp = to_subsys_private(kobj);
- const void *ns = NULL;
-
- if (class_attr->namespace)
- ns = class_attr->namespace(cp->class, class_attr);
- return ns;
-}
-
static void class_release(struct kobject *kobj)
{
struct subsys_private *cp = to_subsys_private(kobj);
@@ -86,7 +74,6 @@ static const struct kobj_ns_type_operations *class_child_ns_type(struct kobject
static const struct sysfs_ops class_sysfs_ops = {
.show = class_attr_show,
.store = class_attr_store,
- .namespace = class_attr_namespace,
};
static struct kobj_type class_ktype = {
@@ -99,21 +86,23 @@ static struct kobj_type class_ktype = {
static struct kset *class_kset;
-int class_create_file(struct class *cls, const struct class_attribute *attr)
+int class_create_file_ns(struct class *cls, const struct class_attribute *attr,
+ const void *ns)
{
int error;
if (cls)
- error = sysfs_create_file(&cls->p->subsys.kobj,
- &attr->attr);
+ error = sysfs_create_file_ns(&cls->p->subsys.kobj,
+ &attr->attr, ns);
else
error = -EINVAL;
return error;
}
-void class_remove_file(struct class *cls, const struct class_attribute *attr)
+void class_remove_file_ns(struct class *cls, const struct class_attribute *attr,
+ const void *ns)
{
if (cls)
- sysfs_remove_file(&cls->p->subsys.kobj, &attr->attr);
+ sysfs_remove_file_ns(&cls->p->subsys.kobj, &attr->attr, ns);
}
static struct class *class_get(struct class *cls)
@@ -600,8 +589,8 @@ int __init classes_init(void)
return 0;
}
-EXPORT_SYMBOL_GPL(class_create_file);
-EXPORT_SYMBOL_GPL(class_remove_file);
+EXPORT_SYMBOL_GPL(class_create_file_ns);
+EXPORT_SYMBOL_GPL(class_remove_file_ns);
EXPORT_SYMBOL_GPL(class_unregister);
EXPORT_SYMBOL_GPL(class_destroy);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index c7cfadcf6752..67b180d855b2 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -455,64 +455,6 @@ static ssize_t online_store(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RW(online);
-static int device_add_attributes(struct device *dev,
- struct device_attribute *attrs)
-{
- int error = 0;
- int i;
-
- if (attrs) {
- for (i = 0; attrs[i].attr.name; i++) {
- error = device_create_file(dev, &attrs[i]);
- if (error)
- break;
- }
- if (error)
- while (--i >= 0)
- device_remove_file(dev, &attrs[i]);
- }
- return error;
-}
-
-static void device_remove_attributes(struct device *dev,
- struct device_attribute *attrs)
-{
- int i;
-
- if (attrs)
- for (i = 0; attrs[i].attr.name; i++)
- device_remove_file(dev, &attrs[i]);
-}
-
-static int device_add_bin_attributes(struct device *dev,
- struct bin_attribute *attrs)
-{
- int error = 0;
- int i;
-
- if (attrs) {
- for (i = 0; attrs[i].attr.name; i++) {
- error = device_create_bin_file(dev, &attrs[i]);
- if (error)
- break;
- }
- if (error)
- while (--i >= 0)
- device_remove_bin_file(dev, &attrs[i]);
- }
- return error;
-}
-
-static void device_remove_bin_attributes(struct device *dev,
- struct bin_attribute *attrs)
-{
- int i;
-
- if (attrs)
- for (i = 0; attrs[i].attr.name; i++)
- device_remove_bin_file(dev, &attrs[i]);
-}
-
int device_add_groups(struct device *dev, const struct attribute_group **groups)
{
return sysfs_create_groups(&dev->kobj, groups);
@@ -534,18 +476,12 @@ static int device_add_attrs(struct device *dev)
error = device_add_groups(dev, class->dev_groups);
if (error)
return error;
- error = device_add_attributes(dev, class->dev_attrs);
- if (error)
- goto err_remove_class_groups;
- error = device_add_bin_attributes(dev, class->dev_bin_attrs);
- if (error)
- goto err_remove_class_attrs;
}
if (type) {
error = device_add_groups(dev, type->groups);
if (error)
- goto err_remove_class_bin_attrs;
+ goto err_remove_class_groups;
}
error = device_add_groups(dev, dev->groups);
@@ -563,12 +499,6 @@ static int device_add_attrs(struct device *dev)
err_remove_type_groups:
if (type)
device_remove_groups(dev, type->groups);
- err_remove_class_bin_attrs:
- if (class)
- device_remove_bin_attributes(dev, class->dev_bin_attrs);
- err_remove_class_attrs:
- if (class)
- device_remove_attributes(dev, class->dev_attrs);
err_remove_class_groups:
if (class)
device_remove_groups(dev, class->dev_groups);
@@ -587,11 +517,8 @@ static void device_remove_attrs(struct device *dev)
if (type)
device_remove_groups(dev, type->groups);
- if (class) {
- device_remove_attributes(dev, class->dev_attrs);
- device_remove_bin_attributes(dev, class->dev_bin_attrs);
+ if (class)
device_remove_groups(dev, class->dev_groups);
- }
}
static ssize_t dev_show(struct device *dev, struct device_attribute *attr,
@@ -1881,6 +1808,7 @@ EXPORT_SYMBOL_GPL(device_destroy);
*/
int device_rename(struct device *dev, const char *new_name)
{
+ struct kobject *kobj = &dev->kobj;
char *old_device_name = NULL;
int error;
@@ -1888,8 +1816,7 @@ int device_rename(struct device *dev, const char *new_name)
if (!dev)
return -EINVAL;
- pr_debug("device: '%s': %s: renaming to '%s'\n", dev_name(dev),
- __func__, new_name);
+ dev_dbg(dev, "renaming to %s\n", new_name);
old_device_name = kstrdup(dev_name(dev), GFP_KERNEL);
if (!old_device_name) {
@@ -1898,13 +1825,14 @@ int device_rename(struct device *dev, const char *new_name)
}
if (dev->class) {
- error = sysfs_rename_link(&dev->class->p->subsys.kobj,
- &dev->kobj, old_device_name, new_name);
+ error = sysfs_rename_link_ns(&dev->class->p->subsys.kobj,
+ kobj, old_device_name,
+ new_name, kobject_namespace(kobj));
if (error)
goto out;
}
- error = kobject_rename(&dev->kobj, new_name);
+ error = kobject_rename(kobj, new_name);
if (error)
goto out;
@@ -2017,7 +1945,7 @@ EXPORT_SYMBOL_GPL(device_move);
*/
void device_shutdown(void)
{
- struct device *dev;
+ struct device *dev, *parent;
spin_lock(&devices_kset->list_lock);
/*
@@ -2034,7 +1962,7 @@ void device_shutdown(void)
* prevent it from being freed because parent's
* lock is to be held
*/
- get_device(dev->parent);
+ parent = get_device(dev->parent);
get_device(dev);
/*
* Make sure the device is off the kset list, in the
@@ -2044,8 +1972,8 @@ void device_shutdown(void)
spin_unlock(&devices_kset->list_lock);
/* hold lock to avoid race with probe/release */
- if (dev->parent)
- device_lock(dev->parent);
+ if (parent)
+ device_lock(parent);
device_lock(dev);
/* Don't allow any more runtime suspends */
@@ -2063,11 +1991,11 @@ void device_shutdown(void)
}
device_unlock(dev);
- if (dev->parent)
- device_unlock(dev->parent);
+ if (parent)
+ device_unlock(parent);
put_device(dev);
- put_device(dev->parent);
+ put_device(parent);
spin_lock(&devices_kset->list_lock);
}
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 848ebbd25717..f48370dfc908 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -44,13 +44,11 @@ static int __ref cpu_subsys_online(struct device *dev)
struct cpu *cpu = container_of(dev, struct cpu, dev);
int cpuid = dev->id;
int from_nid, to_nid;
- int ret = -ENODEV;
-
- cpu_hotplug_driver_lock();
+ int ret;
from_nid = cpu_to_node(cpuid);
if (from_nid == NUMA_NO_NODE)
- goto out;
+ return -ENODEV;
ret = cpu_up(cpuid);
/*
@@ -61,19 +59,12 @@ static int __ref cpu_subsys_online(struct device *dev)
if (from_nid != to_nid)
change_cpu_under_node(cpu, from_nid, to_nid);
- out:
- cpu_hotplug_driver_unlock();
return ret;
}
static int cpu_subsys_offline(struct device *dev)
{
- int ret;
-
- cpu_hotplug_driver_lock();
- ret = cpu_down(dev->id);
- cpu_hotplug_driver_unlock();
- return ret;
+ return cpu_down(dev->id);
}
void unregister_cpu(struct cpu *cpu)
@@ -93,7 +84,17 @@ static ssize_t cpu_probe_store(struct device *dev,
const char *buf,
size_t count)
{
- return arch_cpu_probe(buf, count);
+ ssize_t cnt;
+ int ret;
+
+ ret = lock_device_hotplug_sysfs();
+ if (ret)
+ return ret;
+
+ cnt = arch_cpu_probe(buf, count);
+
+ unlock_device_hotplug();
+ return cnt;
}
static ssize_t cpu_release_store(struct device *dev,
@@ -101,7 +102,17 @@ static ssize_t cpu_release_store(struct device *dev,
const char *buf,
size_t count)
{
- return arch_cpu_release(buf, count);
+ ssize_t cnt;
+ int ret;
+
+ ret = lock_device_hotplug_sysfs();
+ if (ret)
+ return ret;
+
+ cnt = arch_cpu_release(buf, count);
+
+ unlock_device_hotplug();
+ return cnt;
}
static DEVICE_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 35fa36898916..06051767393f 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -499,7 +499,7 @@ static void __device_release_driver(struct device *dev)
BUS_NOTIFY_UNBIND_DRIVER,
dev);
- pm_runtime_put(dev);
+ pm_runtime_put_sync(dev);
if (dev->bus && dev->bus->remove)
dev->bus->remove(dev);
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 507379e7b763..545c4de412c3 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -91,7 +91,8 @@ static __always_inline struct devres * alloc_dr(dr_release_t release,
if (unlikely(!dr))
return NULL;
- memset(dr, 0, tot_size);
+ memset(dr, 0, offsetof(struct devres, data));
+
INIT_LIST_HEAD(&dr->node.entry);
dr->node.release = release;
return dr;
@@ -110,7 +111,7 @@ void * __devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
{
struct devres *dr;
- dr = alloc_dr(release, size, gfp);
+ dr = alloc_dr(release, size, gfp | __GFP_ZERO);
if (unlikely(!dr))
return NULL;
set_node_dbginfo(&dr->node, name, size);
@@ -135,7 +136,7 @@ void * devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
{
struct devres *dr;
- dr = alloc_dr(release, size, gfp);
+ dr = alloc_dr(release, size, gfp | __GFP_ZERO);
if (unlikely(!dr))
return NULL;
return dr->data;
@@ -745,58 +746,62 @@ void devm_remove_action(struct device *dev, void (*action)(void *), void *data)
EXPORT_SYMBOL_GPL(devm_remove_action);
/*
- * Managed kzalloc/kfree
+ * Managed kmalloc/kfree
*/
-static void devm_kzalloc_release(struct device *dev, void *res)
+static void devm_kmalloc_release(struct device *dev, void *res)
{
/* noop */
}
-static int devm_kzalloc_match(struct device *dev, void *res, void *data)
+static int devm_kmalloc_match(struct device *dev, void *res, void *data)
{
return res == data;
}
/**
- * devm_kzalloc - Resource-managed kzalloc
+ * devm_kmalloc - Resource-managed kmalloc
* @dev: Device to allocate memory for
* @size: Allocation size
* @gfp: Allocation gfp flags
*
- * Managed kzalloc. Memory allocated with this function is
+ * Managed kmalloc. Memory allocated with this function is
* automatically freed on driver detach. Like all other devres
* resources, guaranteed alignment is unsigned long long.
*
* RETURNS:
* Pointer to allocated memory on success, NULL on failure.
*/
-void * devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)
+void * devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
{
struct devres *dr;
/* use raw alloc_dr for kmalloc caller tracing */
- dr = alloc_dr(devm_kzalloc_release, size, gfp);
+ dr = alloc_dr(devm_kmalloc_release, size, gfp);
if (unlikely(!dr))
return NULL;
+ /*
+ * This is named devm_kzalloc_release for historical reasons
+ * The initial implementation did not support kmalloc, only kzalloc
+ */
set_node_dbginfo(&dr->node, "devm_kzalloc_release", size);
devres_add(dev, dr->data);
return dr->data;
}
-EXPORT_SYMBOL_GPL(devm_kzalloc);
+EXPORT_SYMBOL_GPL(devm_kmalloc);
/**
* devm_kfree - Resource-managed kfree
* @dev: Device this memory belongs to
* @p: Memory to free
*
- * Free memory allocated with devm_kzalloc().
+ * Free memory allocated with devm_kmalloc().
*/
void devm_kfree(struct device *dev, void *p)
{
int rc;
- rc = devres_destroy(dev, devm_kzalloc_release, devm_kzalloc_match, p);
+ rc = devres_destroy(dev, devm_kmalloc_release, devm_kmalloc_match, p);
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_kfree);
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 7413d065906b..0f3820121e02 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -216,7 +216,7 @@ static int handle_create(const char *nodename, umode_t mode, kuid_t uid,
newattrs.ia_gid = gid;
newattrs.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID;
mutex_lock(&dentry->d_inode->i_mutex);
- notify_change(dentry, &newattrs);
+ notify_change(dentry, &newattrs, NULL);
mutex_unlock(&dentry->d_inode->i_mutex);
/* mark as kernel-created inode */
@@ -322,9 +322,9 @@ static int handle_remove(const char *nodename, struct device *dev)
newattrs.ia_valid =
ATTR_UID|ATTR_GID|ATTR_MODE;
mutex_lock(&dentry->d_inode->i_mutex);
- notify_change(dentry, &newattrs);
+ notify_change(dentry, &newattrs, NULL);
mutex_unlock(&dentry->d_inode->i_mutex);
- err = vfs_unlink(parent.dentry->d_inode, dentry);
+ err = vfs_unlink(parent.dentry->d_inode, dentry, NULL);
if (!err || err == -ENOENT)
deleted = 1;
}
diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
index 1219ab7c3107..1e16cbd61da2 100644
--- a/drivers/base/dma-buf.c
+++ b/drivers/base/dma-buf.c
@@ -77,9 +77,36 @@ static int dma_buf_mmap_internal(struct file *file, struct vm_area_struct *vma)
return dmabuf->ops->mmap(dmabuf, vma);
}
+static loff_t dma_buf_llseek(struct file *file, loff_t offset, int whence)
+{
+ struct dma_buf *dmabuf;
+ loff_t base;
+
+ if (!is_dma_buf_file(file))
+ return -EBADF;
+
+ dmabuf = file->private_data;
+
+ /* only support discovering the end of the buffer,
+ but also allow SEEK_SET to maintain the idiomatic
+ SEEK_END(0), SEEK_CUR(0) pattern */
+ if (whence == SEEK_END)
+ base = dmabuf->size;
+ else if (whence == SEEK_SET)
+ base = 0;
+ else
+ return -EINVAL;
+
+ if (offset != 0)
+ return -EINVAL;
+
+ return base + offset;
+}
+
static const struct file_operations dma_buf_fops = {
.release = dma_buf_release,
.mmap = dma_buf_mmap_internal,
+ .llseek = dma_buf_llseek,
};
/*
@@ -133,7 +160,12 @@ struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops,
dmabuf->exp_name = exp_name;
file = anon_inode_getfile("dmabuf", &dma_buf_fops, dmabuf, flags);
+ if (IS_ERR(file)) {
+ kfree(dmabuf);
+ return ERR_CAST(file);
+ }
+ file->f_mode |= FMODE_LSEEK;
dmabuf->file = file;
mutex_init(&dmabuf->lock);
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 2d730fdad7a3..165c2c299e57 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -96,7 +96,7 @@ static inline __maybe_unused phys_addr_t cma_early_percent_memory(void)
#endif
/**
- * dma_contiguous_reserve() - reserve area for contiguous memory handling
+ * dma_contiguous_reserve() - reserve area(s) for contiguous memory handling
* @limit: End address of the reserved memory (optional, 0 for any).
*
* This function reserves memory from early allocator. It should be
@@ -124,22 +124,29 @@ void __init dma_contiguous_reserve(phys_addr_t limit)
#endif
}
- if (selected_size) {
+ if (selected_size && !dma_contiguous_default_area) {
pr_debug("%s: reserving %ld MiB for global area\n", __func__,
(unsigned long)selected_size / SZ_1M);
- dma_declare_contiguous(NULL, selected_size, 0, limit);
+ dma_contiguous_reserve_area(selected_size, 0, limit,
+ &dma_contiguous_default_area);
}
};
static DEFINE_MUTEX(cma_mutex);
-static int __init cma_activate_area(unsigned long base_pfn, unsigned long count)
+static int __init cma_activate_area(struct cma *cma)
{
- unsigned long pfn = base_pfn;
- unsigned i = count >> pageblock_order;
+ int bitmap_size = BITS_TO_LONGS(cma->count) * sizeof(long);
+ unsigned long base_pfn = cma->base_pfn, pfn = base_pfn;
+ unsigned i = cma->count >> pageblock_order;
struct zone *zone;
+ cma->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+
+ if (!cma->bitmap)
+ return -ENOMEM;
+
WARN_ON_ONCE(!pfn_valid(pfn));
zone = page_zone(pfn_to_page(pfn));
@@ -153,92 +160,53 @@ static int __init cma_activate_area(unsigned long base_pfn, unsigned long count)
}
init_cma_reserved_pageblock(pfn_to_page(base_pfn));
} while (--i);
- return 0;
-}
-
-static struct cma * __init cma_create_area(unsigned long base_pfn,
- unsigned long count)
-{
- int bitmap_size = BITS_TO_LONGS(count) * sizeof(long);
- struct cma *cma;
- int ret = -ENOMEM;
-
- pr_debug("%s(base %08lx, count %lx)\n", __func__, base_pfn, count);
-
- cma = kmalloc(sizeof *cma, GFP_KERNEL);
- if (!cma)
- return ERR_PTR(-ENOMEM);
-
- cma->base_pfn = base_pfn;
- cma->count = count;
- cma->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
- if (!cma->bitmap)
- goto no_mem;
-
- ret = cma_activate_area(base_pfn, count);
- if (ret)
- goto error;
-
- pr_debug("%s: returned %p\n", __func__, (void *)cma);
- return cma;
-
-error:
- kfree(cma->bitmap);
-no_mem:
- kfree(cma);
- return ERR_PTR(ret);
+ return 0;
}
-static struct cma_reserved {
- phys_addr_t start;
- unsigned long size;
- struct device *dev;
-} cma_reserved[MAX_CMA_AREAS] __initdata;
-static unsigned cma_reserved_count __initdata;
+static struct cma cma_areas[MAX_CMA_AREAS];
+static unsigned cma_area_count;
static int __init cma_init_reserved_areas(void)
{
- struct cma_reserved *r = cma_reserved;
- unsigned i = cma_reserved_count;
-
- pr_debug("%s()\n", __func__);
+ int i;
- for (; i; --i, ++r) {
- struct cma *cma;
- cma = cma_create_area(PFN_DOWN(r->start),
- r->size >> PAGE_SHIFT);
- if (!IS_ERR(cma))
- dev_set_cma_area(r->dev, cma);
+ for (i = 0; i < cma_area_count; i++) {
+ int ret = cma_activate_area(&cma_areas[i]);
+ if (ret)
+ return ret;
}
+
return 0;
}
core_initcall(cma_init_reserved_areas);
/**
- * dma_declare_contiguous() - reserve area for contiguous memory handling
- * for particular device
- * @dev: Pointer to device structure.
- * @size: Size of the reserved memory.
- * @base: Start address of the reserved memory (optional, 0 for any).
+ * dma_contiguous_reserve_area() - reserve custom contiguous area
+ * @size: Size of the reserved area (in bytes),
+ * @base: Base address of the reserved area optional, use 0 for any
* @limit: End address of the reserved memory (optional, 0 for any).
+ * @res_cma: Pointer to store the created cma region.
*
- * This function reserves memory for specified device. It should be
- * called by board specific code when early allocator (memblock or bootmem)
- * is still activate.
+ * This function reserves memory from early allocator. It should be
+ * called by arch specific code once the early allocator (memblock or bootmem)
+ * has been activated and all other subsystems have already allocated/reserved
+ * memory. This function allows to create custom reserved areas for specific
+ * devices.
*/
-int __init dma_declare_contiguous(struct device *dev, phys_addr_t size,
- phys_addr_t base, phys_addr_t limit)
+int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base,
+ phys_addr_t limit, struct cma **res_cma)
{
- struct cma_reserved *r = &cma_reserved[cma_reserved_count];
+ struct cma *cma = &cma_areas[cma_area_count];
phys_addr_t alignment;
+ int ret = 0;
pr_debug("%s(size %lx, base %08lx, limit %08lx)\n", __func__,
(unsigned long)size, (unsigned long)base,
(unsigned long)limit);
/* Sanity checks */
- if (cma_reserved_count == ARRAY_SIZE(cma_reserved)) {
+ if (cma_area_count == ARRAY_SIZE(cma_areas)) {
pr_err("Not enough slots for CMA reserved regions!\n");
return -ENOSPC;
}
@@ -256,7 +224,7 @@ int __init dma_declare_contiguous(struct device *dev, phys_addr_t size,
if (base) {
if (memblock_is_region_reserved(base, size) ||
memblock_reserve(base, size) < 0) {
- base = -EBUSY;
+ ret = -EBUSY;
goto err;
}
} else {
@@ -266,7 +234,7 @@ int __init dma_declare_contiguous(struct device *dev, phys_addr_t size,
*/
phys_addr_t addr = __memblock_alloc_base(size, alignment, limit);
if (!addr) {
- base = -ENOMEM;
+ ret = -ENOMEM;
goto err;
} else {
base = addr;
@@ -277,10 +245,11 @@ int __init dma_declare_contiguous(struct device *dev, phys_addr_t size,
* Each reserved area must be initialised later, when more kernel
* subsystems (like slab allocator) are available.
*/
- r->start = base;
- r->size = size;
- r->dev = dev;
- cma_reserved_count++;
+ cma->base_pfn = PFN_DOWN(base);
+ cma->count = size >> PAGE_SHIFT;
+ *res_cma = cma;
+ cma_area_count++;
+
pr_info("CMA: reserved %ld MiB at %08lx\n", (unsigned long)size / SZ_1M,
(unsigned long)base);
@@ -289,7 +258,7 @@ int __init dma_declare_contiguous(struct device *dev, phys_addr_t size,
return 0;
err:
pr_err("CMA: failed to reserve %ld MiB\n", (unsigned long)size / SZ_1M);
- return base;
+ return ret;
}
/**
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 10a4467c63f1..eb8fb94ae2c5 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -282,31 +282,35 @@ static noinline_for_stack long fw_file_size(struct file *file)
return st.size;
}
-static bool fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
+static int fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
{
long size;
char *buf;
+ int rc;
size = fw_file_size(file);
if (size <= 0)
- return false;
+ return -EINVAL;
buf = vmalloc(size);
if (!buf)
- return false;
- if (kernel_read(file, 0, buf, size) != size) {
+ return -ENOMEM;
+ rc = kernel_read(file, 0, buf, size);
+ if (rc != size) {
+ if (rc > 0)
+ rc = -EIO;
vfree(buf);
- return false;
+ return rc;
}
fw_buf->data = buf;
fw_buf->size = size;
- return true;
+ return 0;
}
-static bool fw_get_filesystem_firmware(struct device *device,
+static int fw_get_filesystem_firmware(struct device *device,
struct firmware_buf *buf)
{
int i;
- bool success = false;
+ int rc = -ENOENT;
char *path = __getname();
for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
@@ -321,14 +325,17 @@ static bool fw_get_filesystem_firmware(struct device *device,
file = filp_open(path, O_RDONLY, 0);
if (IS_ERR(file))
continue;
- success = fw_read_file_contents(file, buf);
+ rc = fw_read_file_contents(file, buf);
fput(file);
- if (success)
+ if (rc)
+ dev_warn(device, "firmware, attempted to load %s, but failed with error %d\n",
+ path, rc);
+ else
break;
}
__putname(path);
- if (success) {
+ if (!rc) {
dev_dbg(device, "firmware: direct-loading firmware %s\n",
buf->fw_id);
mutex_lock(&fw_lock);
@@ -337,7 +344,7 @@ static bool fw_get_filesystem_firmware(struct device *device,
mutex_unlock(&fw_lock);
}
- return success;
+ return rc;
}
/* firmware holds the ownership of pages */
@@ -1086,9 +1093,14 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
}
}
- if (!fw_get_filesystem_firmware(device, fw->priv))
+ ret = fw_get_filesystem_firmware(device, fw->priv);
+ if (ret) {
+ dev_warn(device, "Direct firmware load failed with error %d\n",
+ ret);
+ dev_warn(device, "Falling back to user helper\n");
ret = fw_load_from_user_helper(fw, name, device,
uevent, nowait, timeout);
+ }
/* don't cache firmware handled without uevent */
if (!ret)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 9e59f6535c44..bece691cb5d9 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -333,8 +333,10 @@ store_mem_state(struct device *dev,
online_type = ONLINE_KEEP;
else if (!strncmp(buf, "offline", min_t(int, count, 7)))
online_type = -1;
- else
- return -EINVAL;
+ else {
+ ret = -EINVAL;
+ goto err;
+ }
switch (online_type) {
case ONLINE_KERNEL:
@@ -357,6 +359,7 @@ store_mem_state(struct device *dev,
ret = -EINVAL; /* should never happen */
}
+err:
unlock_device_hotplug();
if (ret)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 7616a77ca322..bc9f43bf7e29 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -125,13 +125,7 @@ static ssize_t node_read_meminfo(struct device *dev,
nid, K(node_page_state(nid, NR_WRITEBACK)),
nid, K(node_page_state(nid, NR_FILE_PAGES)),
nid, K(node_page_state(nid, NR_FILE_MAPPED)),
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- nid, K(node_page_state(nid, NR_ANON_PAGES)
- + node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) *
- HPAGE_PMD_NR),
-#else
nid, K(node_page_state(nid, NR_ANON_PAGES)),
-#endif
nid, K(node_page_state(nid, NR_SHMEM)),
nid, node_page_state(nid, NR_KERNEL_STACK) *
THREAD_SIZE / 1024,
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 4f8bef3eb5a8..47051cd25113 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -488,6 +488,11 @@ static int platform_drv_probe(struct device *_dev)
if (ret && ACPI_HANDLE(_dev))
acpi_dev_pm_detach(_dev, true);
+ if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) {
+ dev_warn(_dev, "probe deferral not supported\n");
+ ret = -ENXIO;
+ }
+
return ret;
}
@@ -553,8 +558,7 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
/**
* platform_driver_probe - register driver for non-hotpluggable device
* @drv: platform driver structure
- * @probe: the driver probe routine, probably from an __init section,
- * must not return -EPROBE_DEFER.
+ * @probe: the driver probe routine, probably from an __init section
*
* Use this instead of platform_driver_register() when you know the device
* is not hotpluggable and has already been registered, and you want to
@@ -565,8 +569,7 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
* into system-on-chip processors, where the controller devices have been
* configured as part of board setup.
*
- * This is incompatible with deferred probing so probe() must not
- * return -EPROBE_DEFER.
+ * Note that this is incompatible with deferred probing.
*
* Returns zero if the driver registered and bound to a device, else returns
* a negative error code and with the driver not registered.
@@ -576,6 +579,12 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv,
{
int retval, code;
+ /*
+ * Prevent driver from requesting probe deferral to avoid further
+ * futile probe attempts.
+ */
+ drv->prevent_deferred_probe = true;
+
/* make sure driver won't have bind/unbind attributes */
drv->driver.suppress_bind_attrs = true;
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 9f098a82cf04..c12e9b9556be 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -30,6 +30,8 @@
#include <linux/suspend.h>
#include <trace/events/power.h>
#include <linux/cpuidle.h>
+#include <linux/timer.h>
+
#include "../base.h"
#include "power.h"
@@ -390,6 +392,71 @@ static int dpm_run_callback(pm_callback_t cb, struct device *dev,
return error;
}
+#ifdef CONFIG_DPM_WATCHDOG
+struct dpm_watchdog {
+ struct device *dev;
+ struct task_struct *tsk;
+ struct timer_list timer;
+};
+
+#define DECLARE_DPM_WATCHDOG_ON_STACK(wd) \
+ struct dpm_watchdog wd
+
+/**
+ * dpm_watchdog_handler - Driver suspend / resume watchdog handler.
+ * @data: Watchdog object address.
+ *
+ * Called when a driver has timed out suspending or resuming.
+ * There's not much we can do here to recover so panic() to
+ * capture a crash-dump in pstore.
+ */
+static void dpm_watchdog_handler(unsigned long data)
+{
+ struct dpm_watchdog *wd = (void *)data;
+
+ dev_emerg(wd->dev, "**** DPM device timeout ****\n");
+ show_stack(wd->tsk, NULL);
+ panic("%s %s: unrecoverable failure\n",
+ dev_driver_string(wd->dev), dev_name(wd->dev));
+}
+
+/**
+ * dpm_watchdog_set - Enable pm watchdog for given device.
+ * @wd: Watchdog. Must be allocated on the stack.
+ * @dev: Device to handle.
+ */
+static void dpm_watchdog_set(struct dpm_watchdog *wd, struct device *dev)
+{
+ struct timer_list *timer = &wd->timer;
+
+ wd->dev = dev;
+ wd->tsk = current;
+
+ init_timer_on_stack(timer);
+ /* use same timeout value for both suspend and resume */
+ timer->expires = jiffies + HZ * CONFIG_DPM_WATCHDOG_TIMEOUT;
+ timer->function = dpm_watchdog_handler;
+ timer->data = (unsigned long)wd;
+ add_timer(timer);
+}
+
+/**
+ * dpm_watchdog_clear - Disable suspend/resume watchdog.
+ * @wd: Watchdog to disable.
+ */
+static void dpm_watchdog_clear(struct dpm_watchdog *wd)
+{
+ struct timer_list *timer = &wd->timer;
+
+ del_timer_sync(timer);
+ destroy_timer_on_stack(timer);
+}
+#else
+#define DECLARE_DPM_WATCHDOG_ON_STACK(wd)
+#define dpm_watchdog_set(x, y)
+#define dpm_watchdog_clear(x)
+#endif
+
/*------------------------- Resume routines -------------------------*/
/**
@@ -576,6 +643,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
pm_callback_t callback = NULL;
char *info = NULL;
int error = 0;
+ DECLARE_DPM_WATCHDOG_ON_STACK(wd);
TRACE_DEVICE(dev);
TRACE_RESUME(0);
@@ -584,6 +652,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
goto Complete;
dpm_wait(dev->parent, async);
+ dpm_watchdog_set(&wd, dev);
device_lock(dev);
/*
@@ -642,6 +711,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
Unlock:
device_unlock(dev);
+ dpm_watchdog_clear(&wd);
Complete:
complete_all(&dev->power.completion);
@@ -687,7 +757,7 @@ void dpm_resume(pm_message_t state)
async_error = 0;
list_for_each_entry(dev, &dpm_suspended_list, power.entry) {
- INIT_COMPLETION(dev->power.completion);
+ reinit_completion(&dev->power.completion);
if (is_async(dev)) {
get_device(dev);
async_schedule(async_resume, dev);
@@ -1060,6 +1130,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
pm_callback_t callback = NULL;
char *info = NULL;
int error = 0;
+ DECLARE_DPM_WATCHDOG_ON_STACK(wd);
dpm_wait_for_children(dev, async);
@@ -1083,6 +1154,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
if (dev->power.syscore)
goto Complete;
+ dpm_watchdog_set(&wd, dev);
device_lock(dev);
if (dev->pm_domain) {
@@ -1139,6 +1211,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
}
device_unlock(dev);
+ dpm_watchdog_clear(&wd);
Complete:
complete_all(&dev->power.completion);
@@ -1164,7 +1237,7 @@ static void async_suspend(void *data, async_cookie_t cookie)
static int device_suspend(struct device *dev)
{
- INIT_COMPLETION(dev->power.completion);
+ reinit_completion(&dev->power.completion);
if (pm_async_enabled && dev->power.async_suspend) {
get_device(dev);
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index ef89897c6043..fa4187418440 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -21,7 +21,7 @@
#include <linux/list.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
-#include <linux/opp.h>
+#include <linux/pm_opp.h>
#include <linux/of.h>
#include <linux/export.h>
@@ -42,7 +42,7 @@
*/
/**
- * struct opp - Generic OPP description structure
+ * struct dev_pm_opp - Generic OPP description structure
* @node: opp list 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.
@@ -59,7 +59,7 @@
*
* This structure stores the OPP information for a given device.
*/
-struct opp {
+struct dev_pm_opp {
struct list_head node;
bool available;
@@ -136,7 +136,7 @@ static struct device_opp *find_device_opp(struct device *dev)
}
/**
- * opp_get_voltage() - Gets the voltage corresponding to an available opp
+ * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an available opp
* @opp: opp for which voltage has to be returned for
*
* Return voltage in micro volt corresponding to the opp, else
@@ -150,9 +150,9 @@ static struct device_opp *find_device_opp(struct device *dev)
* prior to unlocking with rcu_read_unlock() to maintain the integrity of the
* pointer.
*/
-unsigned long opp_get_voltage(struct opp *opp)
+unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
{
- struct opp *tmp_opp;
+ struct dev_pm_opp *tmp_opp;
unsigned long v = 0;
tmp_opp = rcu_dereference(opp);
@@ -163,10 +163,10 @@ unsigned long opp_get_voltage(struct opp *opp)
return v;
}
-EXPORT_SYMBOL_GPL(opp_get_voltage);
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage);
/**
- * opp_get_freq() - Gets the frequency corresponding to an available opp
+ * dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp
* @opp: opp for which frequency has to be returned for
*
* Return frequency in hertz corresponding to the opp, else
@@ -180,9 +180,9 @@ EXPORT_SYMBOL_GPL(opp_get_voltage);
* prior to unlocking with rcu_read_unlock() to maintain the integrity of the
* pointer.
*/
-unsigned long opp_get_freq(struct opp *opp)
+unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
{
- struct opp *tmp_opp;
+ struct dev_pm_opp *tmp_opp;
unsigned long f = 0;
tmp_opp = rcu_dereference(opp);
@@ -193,10 +193,10 @@ unsigned long opp_get_freq(struct opp *opp)
return f;
}
-EXPORT_SYMBOL_GPL(opp_get_freq);
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
/**
- * 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 list
* @dev: device for which we do this operation
*
* This function returns the number of available opps if there are any,
@@ -206,10 +206,10 @@ EXPORT_SYMBOL_GPL(opp_get_freq);
* internally references two RCU protected structures: device_opp and opp which
* are safe as long as we are under a common RCU locked section.
*/
-int opp_get_opp_count(struct device *dev)
+int dev_pm_opp_get_opp_count(struct device *dev)
{
struct device_opp *dev_opp;
- struct opp *temp_opp;
+ struct dev_pm_opp *temp_opp;
int count = 0;
dev_opp = find_device_opp(dev);
@@ -226,10 +226,10 @@ int opp_get_opp_count(struct device *dev)
return count;
}
-EXPORT_SYMBOL_GPL(opp_get_opp_count);
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
/**
- * opp_find_freq_exact() - search for an exact frequency
+ * dev_pm_opp_find_freq_exact() - search for an exact frequency
* @dev: device for which we do this operation
* @freq: frequency to search for
* @available: true/false - match for available opp
@@ -254,11 +254,12 @@ EXPORT_SYMBOL_GPL(opp_get_opp_count);
* 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 opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
- bool available)
+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 *temp_opp, *opp = ERR_PTR(-ERANGE);
+ struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
dev_opp = find_device_opp(dev);
if (IS_ERR(dev_opp)) {
@@ -277,10 +278,10 @@ struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
return opp;
}
-EXPORT_SYMBOL_GPL(opp_find_freq_exact);
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact);
/**
- * opp_find_freq_ceil() - Search for an rounded ceil freq
+ * dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq
* @dev: device for which we do this operation
* @freq: Start frequency
*
@@ -300,10 +301,11 @@ EXPORT_SYMBOL_GPL(opp_find_freq_exact);
* 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 opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq)
+struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
+ unsigned long *freq)
{
struct device_opp *dev_opp;
- struct opp *temp_opp, *opp = ERR_PTR(-ERANGE);
+ struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
if (!dev || !freq) {
dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
@@ -324,10 +326,10 @@ struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq)
return opp;
}
-EXPORT_SYMBOL_GPL(opp_find_freq_ceil);
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
/**
- * opp_find_freq_floor() - Search for a rounded floor freq
+ * dev_pm_opp_find_freq_floor() - Search for a rounded floor freq
* @dev: device for which we do this operation
* @freq: Start frequency
*
@@ -347,10 +349,11 @@ EXPORT_SYMBOL_GPL(opp_find_freq_ceil);
* 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 opp *opp_find_freq_floor(struct device *dev, unsigned long *freq)
+struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
+ unsigned long *freq)
{
struct device_opp *dev_opp;
- struct opp *temp_opp, *opp = ERR_PTR(-ERANGE);
+ struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
if (!dev || !freq) {
dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
@@ -375,17 +378,17 @@ struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq)
return opp;
}
-EXPORT_SYMBOL_GPL(opp_find_freq_floor);
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
/**
- * opp_add() - Add an OPP table from a table definitions
+ * dev_pm_opp_add() - Add an OPP table from a table definitions
* @dev: device for which we do this operation
* @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.
* The opp is made available by default and it can be controlled using
- * opp_enable/disable functions.
+ * dev_pm_opp_enable/disable functions.
*
* Locking: The internal device_opp and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
@@ -393,14 +396,14 @@ EXPORT_SYMBOL_GPL(opp_find_freq_floor);
* that this function is *NOT* called under RCU protection or in contexts where
* mutex cannot be locked.
*/
-int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
+int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
{
struct device_opp *dev_opp = NULL;
- struct opp *opp, *new_opp;
+ struct dev_pm_opp *opp, *new_opp;
struct list_head *head;
/* allocate new OPP node */
- new_opp = kzalloc(sizeof(struct opp), GFP_KERNEL);
+ new_opp = kzalloc(sizeof(*new_opp), GFP_KERNEL);
if (!new_opp) {
dev_warn(dev, "%s: Unable to create new OPP node\n", __func__);
return -ENOMEM;
@@ -460,7 +463,7 @@ int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
srcu_notifier_call_chain(&dev_opp->head, OPP_EVENT_ADD, new_opp);
return 0;
}
-EXPORT_SYMBOL_GPL(opp_add);
+EXPORT_SYMBOL_GPL(dev_pm_opp_add);
/**
* opp_set_availability() - helper to set the availability of an opp
@@ -485,11 +488,11 @@ static int opp_set_availability(struct device *dev, unsigned long freq,
bool availability_req)
{
struct device_opp *tmp_dev_opp, *dev_opp = ERR_PTR(-ENODEV);
- struct opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV);
+ struct dev_pm_opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV);
int r = 0;
/* keep the node allocated */
- new_opp = kmalloc(sizeof(struct opp), GFP_KERNEL);
+ new_opp = kmalloc(sizeof(*new_opp), GFP_KERNEL);
if (!new_opp) {
dev_warn(dev, "%s: Unable to create OPP\n", __func__);
return -ENOMEM;
@@ -552,13 +555,13 @@ unlock:
}
/**
- * opp_enable() - Enable a specific OPP
+ * dev_pm_opp_enable() - Enable a specific OPP
* @dev: device for which we do this operation
* @freq: OPP frequency to enable
*
* Enables a provided opp. If the operation is valid, this returns 0, else the
* corresponding error value. It is meant to be used for users an OPP available
- * after being temporarily made unavailable with opp_disable.
+ * after being temporarily made unavailable with dev_pm_opp_disable.
*
* Locking: The internal device_opp and opp structures are RCU protected.
* Hence this function indirectly uses RCU and mutex locks to keep the
@@ -566,21 +569,21 @@ unlock:
* this function is *NOT* called under RCU protection or in contexts where
* mutex locking or synchronize_rcu() blocking calls cannot be used.
*/
-int opp_enable(struct device *dev, unsigned long freq)
+int dev_pm_opp_enable(struct device *dev, unsigned long freq)
{
return opp_set_availability(dev, freq, true);
}
-EXPORT_SYMBOL_GPL(opp_enable);
+EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
/**
- * opp_disable() - Disable a specific OPP
+ * dev_pm_opp_disable() - Disable a specific OPP
* @dev: device for which we do this operation
* @freq: OPP frequency to disable
*
* Disables a provided opp. If the operation is valid, this returns
* 0, else the corresponding error value. It is meant to be a temporary
* control by users to make this OPP not available until the circumstances are
- * right to make it available again (with a call to opp_enable).
+ * 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.
* Hence this function indirectly uses RCU and mutex locks to keep the
@@ -588,15 +591,15 @@ EXPORT_SYMBOL_GPL(opp_enable);
* this function is *NOT* called under RCU protection or in contexts where
* mutex locking or synchronize_rcu() blocking calls cannot be used.
*/
-int opp_disable(struct device *dev, unsigned long freq)
+int dev_pm_opp_disable(struct device *dev, unsigned long freq)
{
return opp_set_availability(dev, freq, false);
}
-EXPORT_SYMBOL_GPL(opp_disable);
+EXPORT_SYMBOL_GPL(dev_pm_opp_disable);
#ifdef CONFIG_CPU_FREQ
/**
- * opp_init_cpufreq_table() - create a cpufreq table for a device
+ * dev_pm_opp_init_cpufreq_table() - create a cpufreq table for a device
* @dev: device for which we do this operation
* @table: Cpufreq table returned back to caller
*
@@ -619,11 +622,11 @@ EXPORT_SYMBOL_GPL(opp_disable);
* Callers should ensure that this function is *NOT* called under RCU protection
* or in contexts where mutex locking cannot be used.
*/
-int opp_init_cpufreq_table(struct device *dev,
+int dev_pm_opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
struct device_opp *dev_opp;
- struct opp *opp;
+ struct dev_pm_opp *opp;
struct cpufreq_frequency_table *freq_table;
int i = 0;
@@ -639,7 +642,7 @@ int opp_init_cpufreq_table(struct device *dev,
}
freq_table = kzalloc(sizeof(struct cpufreq_frequency_table) *
- (opp_get_opp_count(dev) + 1), GFP_KERNEL);
+ (dev_pm_opp_get_opp_count(dev) + 1), GFP_KERNEL);
if (!freq_table) {
mutex_unlock(&dev_opp_list_lock);
dev_warn(dev, "%s: Unable to allocate frequency table\n",
@@ -663,16 +666,16 @@ int opp_init_cpufreq_table(struct device *dev,
return 0;
}
-EXPORT_SYMBOL_GPL(opp_init_cpufreq_table);
+EXPORT_SYMBOL_GPL(dev_pm_opp_init_cpufreq_table);
/**
- * opp_free_cpufreq_table() - free the cpufreq table
+ * dev_pm_opp_free_cpufreq_table() - free the cpufreq table
* @dev: device for which we do this operation
* @table: table to free
*
- * Free up the table allocated by opp_init_cpufreq_table
+ * Free up the table allocated by dev_pm_opp_init_cpufreq_table
*/
-void opp_free_cpufreq_table(struct device *dev,
+void dev_pm_opp_free_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
if (!table)
@@ -681,14 +684,14 @@ void opp_free_cpufreq_table(struct device *dev,
kfree(*table);
*table = NULL;
}
-EXPORT_SYMBOL_GPL(opp_free_cpufreq_table);
+EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
#endif /* CONFIG_CPU_FREQ */
/**
- * opp_get_notifier() - find notifier_head of the device with opp
+ * dev_pm_opp_get_notifier() - find notifier_head of the device with opp
* @dev: device pointer used to lookup device OPPs.
*/
-struct srcu_notifier_head *opp_get_notifier(struct device *dev)
+struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev)
{
struct device_opp *dev_opp = find_device_opp(dev);
@@ -732,7 +735,7 @@ int of_init_opp_table(struct device *dev)
unsigned long freq = be32_to_cpup(val++) * 1000;
unsigned long volt = be32_to_cpup(val++);
- if (opp_add(dev, freq, volt)) {
+ if (dev_pm_opp_add(dev, freq, volt)) {
dev_warn(dev, "%s: Failed to add OPP %ld\n",
__func__, freq);
continue;
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 268a35097578..72e00e66ecc5 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -258,7 +258,8 @@ static int __rpm_callback(int (*cb)(struct device *), struct device *dev)
* Check if the device's runtime PM status allows it to be suspended. If
* another idle notification has been started earlier, return immediately. If
* the RPM_ASYNC flag is set then queue an idle-notification request; otherwise
- * run the ->runtime_idle() callback directly.
+ * run the ->runtime_idle() callback directly. If the ->runtime_idle callback
+ * doesn't exist or if it returns 0, call rpm_suspend with the RPM_AUTO flag.
*
* This function must be called under dev->power.lock with interrupts disabled.
*/
@@ -331,7 +332,7 @@ static int rpm_idle(struct device *dev, int rpmflags)
out:
trace_rpm_return_int(dev, _THIS_IP_, retval);
- return retval ? retval : rpm_suspend(dev, rpmflags);
+ return retval ? retval : rpm_suspend(dev, rpmflags | RPM_AUTO);
}
/**
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index f0d30543fcce..4251570610c9 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -3,7 +3,7 @@
# subsystems should select the appropriate symbols.
config REGMAP
- default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_MMIO || REGMAP_IRQ)
+ default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_MMIO || REGMAP_IRQ)
select LZO_COMPRESS
select LZO_DECOMPRESS
select IRQ_DOMAIN if REGMAP_IRQ
@@ -15,6 +15,9 @@ config REGMAP_I2C
config REGMAP_SPI
tristate
+config REGMAP_SPMI
+ tristate
+
config REGMAP_MMIO
tristate
diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile
index cf129980abd0..a7c670b4123a 100644
--- a/drivers/base/regmap/Makefile
+++ b/drivers/base/regmap/Makefile
@@ -3,5 +3,6 @@ obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o
obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o
obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o
obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o
+obj-$(CONFIG_REGMAP_SPMI) += regmap-spmi.o
obj-$(CONFIG_REGMAP_MMIO) += regmap-mmio.o
obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 57f777835d97..33414b1de201 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -44,7 +44,6 @@ struct regmap_format {
struct regmap_async {
struct list_head list;
- struct work_struct cleanup;
struct regmap *map;
void *work_buf;
};
@@ -64,9 +63,11 @@ struct regmap {
void *bus_context;
const char *name;
+ bool async;
spinlock_t async_lock;
wait_queue_head_t async_waitq;
struct list_head async_list;
+ struct list_head async_free;
int async_ret;
#ifdef CONFIG_DEBUG_FS
@@ -179,6 +180,9 @@ struct regmap_field {
/* lsb */
unsigned int shift;
unsigned int reg;
+
+ unsigned int id_size;
+ unsigned int id_offset;
};
#ifdef CONFIG_DEBUG_FS
@@ -218,7 +222,7 @@ bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
int regcache_lookup_reg(struct regmap *map, unsigned int reg);
int _regmap_raw_write(struct regmap *map, unsigned int reg,
- const void *val, size_t val_len, bool async);
+ const void *val, size_t val_len);
void regmap_async_complete_cb(struct regmap_async *async, int ret);
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index d6c2d691b6e8..d4dd77134814 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -307,6 +307,8 @@ int regcache_sync(struct regmap *map)
if (!map->cache_dirty)
goto out;
+ map->async = true;
+
/* Apply any patch first */
map->cache_bypass = 1;
for (i = 0; i < map->patch_regs; i++) {
@@ -332,11 +334,15 @@ int regcache_sync(struct regmap *map)
map->cache_dirty = false;
out:
- trace_regcache_sync(map->dev, name, "stop");
/* Restore the bypass state */
+ map->async = false;
map->cache_bypass = bypass;
map->unlock(map->lock_arg);
+ regmap_async_complete(map);
+
+ trace_regcache_sync(map->dev, name, "stop");
+
return ret;
}
EXPORT_SYMBOL_GPL(regcache_sync);
@@ -375,17 +381,23 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
if (!map->cache_dirty)
goto out;
+ map->async = true;
+
if (map->cache_ops->sync)
ret = map->cache_ops->sync(map, min, max);
else
ret = regcache_default_sync(map, min, max);
out:
- trace_regcache_sync(map->dev, name, "stop region");
/* Restore the bypass state */
map->cache_bypass = bypass;
+ map->async = false;
map->unlock(map->lock_arg);
+ regmap_async_complete(map);
+
+ trace_regcache_sync(map->dev, name, "stop region");
+
return ret;
}
EXPORT_SYMBOL_GPL(regcache_sync_region);
@@ -631,8 +643,7 @@ static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,
map->cache_bypass = 1;
- ret = _regmap_raw_write(map, base, *data, count * val_bytes,
- false);
+ ret = _regmap_raw_write(map, base, *data, count * val_bytes);
map->cache_bypass = 0;
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index de11ecaf3833..c5471cd6ebb7 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -15,10 +15,19 @@
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/device.h>
+#include <linux/list.h>
#include "internal.h"
+struct regmap_debugfs_node {
+ struct regmap *map;
+ const char *name;
+ struct list_head link;
+};
+
static struct dentry *regmap_debugfs_root;
+static LIST_HEAD(regmap_debugfs_early_list);
+static DEFINE_MUTEX(regmap_debugfs_early_lock);
/* Calculate the length of a fixed format */
static size_t regmap_calc_reg_len(int max_val, char *buf, size_t buf_size)
@@ -465,6 +474,20 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
struct rb_node *next;
struct regmap_range_node *range_node;
+ /* If we don't have the debugfs root yet, postpone init */
+ if (!regmap_debugfs_root) {
+ struct regmap_debugfs_node *node;
+ node = kzalloc(sizeof(*node), GFP_KERNEL);
+ if (!node)
+ return;
+ node->map = map;
+ node->name = name;
+ mutex_lock(&regmap_debugfs_early_lock);
+ list_add(&node->link, &regmap_debugfs_early_list);
+ mutex_unlock(&regmap_debugfs_early_lock);
+ return;
+ }
+
INIT_LIST_HEAD(&map->debugfs_off_cache);
mutex_init(&map->cache_lock);
@@ -519,18 +542,42 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
void regmap_debugfs_exit(struct regmap *map)
{
- debugfs_remove_recursive(map->debugfs);
- mutex_lock(&map->cache_lock);
- regmap_debugfs_free_dump_cache(map);
- mutex_unlock(&map->cache_lock);
- kfree(map->debugfs_name);
+ if (map->debugfs) {
+ debugfs_remove_recursive(map->debugfs);
+ mutex_lock(&map->cache_lock);
+ regmap_debugfs_free_dump_cache(map);
+ mutex_unlock(&map->cache_lock);
+ kfree(map->debugfs_name);
+ } else {
+ struct regmap_debugfs_node *node, *tmp;
+
+ mutex_lock(&regmap_debugfs_early_lock);
+ list_for_each_entry_safe(node, tmp, &regmap_debugfs_early_list,
+ link) {
+ if (node->map == map) {
+ list_del(&node->link);
+ kfree(node);
+ }
+ }
+ mutex_unlock(&regmap_debugfs_early_lock);
+ }
}
void regmap_debugfs_initcall(void)
{
+ struct regmap_debugfs_node *node, *tmp;
+
regmap_debugfs_root = debugfs_create_dir("regmap", NULL);
if (!regmap_debugfs_root) {
pr_warn("regmap: Failed to create debugfs root\n");
return;
}
+
+ mutex_lock(&regmap_debugfs_early_lock);
+ list_for_each_entry_safe(node, tmp, &regmap_debugfs_early_list, link) {
+ regmap_debugfs_init(node->map, node->name);
+ list_del(&node->link);
+ kfree(node);
+ }
+ mutex_unlock(&regmap_debugfs_early_lock);
}
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index d10456ffd811..763c60d3d277 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -105,6 +105,22 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
"Failed to sync wakes in %x: %d\n",
reg, ret);
}
+
+ if (!d->chip->init_ack_masked)
+ continue;
+ /*
+ * Ack all the masked interrupts uncondictionly,
+ * OR if there is masked interrupt which hasn't been Acked,
+ * it'll be ignored in irq handler, then may introduce irq storm
+ */
+ if (d->mask_buf[i] && d->chip->ack_base) {
+ reg = d->chip->ack_base +
+ (i * map->reg_stride * d->irq_reg_stride);
+ ret = regmap_write(map, reg, d->mask_buf[i]);
+ if (ret != 0)
+ dev_err(d->map->dev, "Failed to ack 0x%x: %d\n",
+ reg, ret);
+ }
}
if (d->chip->runtime_pm)
diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c
index 4c506bd940f3..37f12ae7aada 100644
--- a/drivers/base/regmap/regmap-spi.c
+++ b/drivers/base/regmap/regmap-spi.c
@@ -73,7 +73,8 @@ static int regmap_spi_async_write(void *context,
spi_message_init(&async->m);
spi_message_add_tail(&async->t[0], &async->m);
- spi_message_add_tail(&async->t[1], &async->m);
+ if (val)
+ spi_message_add_tail(&async->t[1], &async->m);
async->m.complete = regmap_spi_complete;
async->m.context = async;
diff --git a/drivers/base/regmap/regmap-spmi.c b/drivers/base/regmap/regmap-spmi.c
new file mode 100644
index 000000000000..ac2391013db1
--- /dev/null
+++ b/drivers/base/regmap/regmap-spmi.c
@@ -0,0 +1,90 @@
+/*
+ * Register map access API - SPMI support
+ *
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * Based on regmap-i2c.c:
+ * Copyright 2011 Wolfson Microelectronics plc
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/regmap.h>
+#include <linux/spmi.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+static int regmap_spmi_read(void *context,
+ const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ BUG_ON(reg_size != 2);
+ return spmi_ext_register_readl(context, *(u16 *)reg,
+ val, val_size);
+}
+
+static int regmap_spmi_gather_write(void *context,
+ const void *reg, size_t reg_size,
+ const void *val, size_t val_size)
+{
+ BUG_ON(reg_size != 2);
+ return spmi_ext_register_writel(context, *(u16 *)reg, val, val_size);
+}
+
+static int regmap_spmi_write(void *context, const void *data,
+ size_t count)
+{
+ BUG_ON(count < 2);
+ return regmap_spmi_gather_write(context, data, 2, data + 2, count - 2);
+}
+
+static struct regmap_bus regmap_spmi = {
+ .read = regmap_spmi_read,
+ .write = regmap_spmi_write,
+ .gather_write = regmap_spmi_gather_write,
+ .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
+ .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
+};
+
+/**
+ * regmap_init_spmi(): Initialize register map
+ *
+ * @sdev: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+struct regmap *regmap_init_spmi(struct spmi_device *sdev,
+ const struct regmap_config *config)
+{
+ return regmap_init(&sdev->dev, &regmap_spmi, sdev, config);
+}
+EXPORT_SYMBOL_GPL(regmap_init_spmi);
+
+/**
+ * devm_regmap_init_spmi(): Initialise managed register map
+ *
+ * @sdev: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct regmap. The regmap will be automatically freed by the
+ * device management code.
+ */
+struct regmap *devm_regmap_init_spmi(struct spmi_device *sdev,
+ const struct regmap_config *config)
+{
+ return devm_regmap_init(&sdev->dev, &regmap_spmi, sdev, config);
+}
+EXPORT_SYMBOL_GPL(devm_regmap_init_spmi);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 7d689a15c500..9c021d9cace0 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -42,15 +42,6 @@ static int _regmap_bus_formatted_write(void *context, unsigned int reg,
static int _regmap_bus_raw_write(void *context, unsigned int reg,
unsigned int val);
-static void async_cleanup(struct work_struct *work)
-{
- struct regmap_async *async = container_of(work, struct regmap_async,
- cleanup);
-
- kfree(async->work_buf);
- kfree(async);
-}
-
bool regmap_reg_in_ranges(unsigned int reg,
const struct regmap_range *ranges,
unsigned int nranges)
@@ -465,6 +456,7 @@ struct regmap *regmap_init(struct device *dev,
spin_lock_init(&map->async_lock);
INIT_LIST_HEAD(&map->async_list);
+ INIT_LIST_HEAD(&map->async_free);
init_waitqueue_head(&map->async_waitq);
if (config->read_flag_mask || config->write_flag_mask) {
@@ -821,6 +813,8 @@ static void regmap_field_init(struct regmap_field *rm_field,
rm_field->reg = reg_field.reg;
rm_field->shift = reg_field.lsb;
rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb);
+ rm_field->id_size = reg_field.id_size;
+ rm_field->id_offset = reg_field.id_offset;
}
/**
@@ -942,12 +936,22 @@ EXPORT_SYMBOL_GPL(regmap_reinit_cache);
*/
void regmap_exit(struct regmap *map)
{
+ struct regmap_async *async;
+
regcache_exit(map);
regmap_debugfs_exit(map);
regmap_range_exit(map);
if (map->bus && map->bus->free_context)
map->bus->free_context(map->bus_context);
kfree(map->work_buf);
+ while (!list_empty(&map->async_free)) {
+ async = list_first_entry_or_null(&map->async_free,
+ struct regmap_async,
+ list);
+ list_del(&async->list);
+ kfree(async->work_buf);
+ kfree(async);
+ }
kfree(map);
}
EXPORT_SYMBOL_GPL(regmap_exit);
@@ -1039,7 +1043,7 @@ static int _regmap_select_page(struct regmap *map, unsigned int *reg,
}
int _regmap_raw_write(struct regmap *map, unsigned int reg,
- const void *val, size_t val_len, bool async)
+ const void *val, size_t val_len)
{
struct regmap_range_node *range;
unsigned long flags;
@@ -1091,7 +1095,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
dev_dbg(map->dev, "Writing window %d/%zu\n",
win_residue, val_len / map->format.val_bytes);
ret = _regmap_raw_write(map, reg, val, win_residue *
- map->format.val_bytes, async);
+ map->format.val_bytes);
if (ret != 0)
return ret;
@@ -1114,49 +1118,72 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
u8[0] |= map->write_flag_mask;
- if (async && map->bus->async_write) {
- struct regmap_async *async = map->bus->async_alloc();
- if (!async)
- return -ENOMEM;
+ /*
+ * Essentially all I/O mechanisms will be faster with a single
+ * buffer to write. Since register syncs often generate raw
+ * writes of single registers optimise that case.
+ */
+ if (val != work_val && val_len == map->format.val_bytes) {
+ memcpy(work_val, val, map->format.val_bytes);
+ val = work_val;
+ }
+
+ if (map->async && map->bus->async_write) {
+ struct regmap_async *async;
trace_regmap_async_write_start(map->dev, reg, val_len);
- async->work_buf = kzalloc(map->format.buf_size,
- GFP_KERNEL | GFP_DMA);
- if (!async->work_buf) {
- kfree(async);
- return -ENOMEM;
+ spin_lock_irqsave(&map->async_lock, flags);
+ async = list_first_entry_or_null(&map->async_free,
+ struct regmap_async,
+ list);
+ if (async)
+ list_del(&async->list);
+ spin_unlock_irqrestore(&map->async_lock, flags);
+
+ if (!async) {
+ async = map->bus->async_alloc();
+ if (!async)
+ return -ENOMEM;
+
+ async->work_buf = kzalloc(map->format.buf_size,
+ GFP_KERNEL | GFP_DMA);
+ if (!async->work_buf) {
+ kfree(async);
+ return -ENOMEM;
+ }
}
- INIT_WORK(&async->cleanup, async_cleanup);
async->map = map;
/* If the caller supplied the value we can use it safely. */
memcpy(async->work_buf, map->work_buf, map->format.pad_bytes +
map->format.reg_bytes + map->format.val_bytes);
- if (val == work_val)
- val = async->work_buf + map->format.pad_bytes +
- map->format.reg_bytes;
spin_lock_irqsave(&map->async_lock, flags);
list_add_tail(&async->list, &map->async_list);
spin_unlock_irqrestore(&map->async_lock, flags);
- ret = map->bus->async_write(map->bus_context, async->work_buf,
- map->format.reg_bytes +
- map->format.pad_bytes,
- val, val_len, async);
+ if (val != work_val)
+ ret = map->bus->async_write(map->bus_context,
+ async->work_buf,
+ map->format.reg_bytes +
+ map->format.pad_bytes,
+ val, val_len, async);
+ else
+ ret = map->bus->async_write(map->bus_context,
+ async->work_buf,
+ map->format.reg_bytes +
+ map->format.pad_bytes +
+ val_len, NULL, 0, async);
if (ret != 0) {
dev_err(map->dev, "Failed to schedule write: %d\n",
ret);
spin_lock_irqsave(&map->async_lock, flags);
- list_del(&async->list);
+ list_move(&async->list, &map->async_free);
spin_unlock_irqrestore(&map->async_lock, flags);
-
- kfree(async->work_buf);
- kfree(async);
}
return ret;
@@ -1253,7 +1280,7 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg,
map->work_buf +
map->format.reg_bytes +
map->format.pad_bytes,
- map->format.val_bytes, false);
+ map->format.val_bytes);
}
static inline void *_regmap_map_get_context(struct regmap *map)
@@ -1318,6 +1345,37 @@ int regmap_write(struct regmap *map, unsigned int reg, unsigned int val)
EXPORT_SYMBOL_GPL(regmap_write);
/**
+ * regmap_write_async(): Write a value to a single register asynchronously
+ *
+ * @map: Register map to write to
+ * @reg: Register 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_write_async(struct regmap *map, unsigned int reg, unsigned int val)
+{
+ int ret;
+
+ if (reg % map->reg_stride)
+ return -EINVAL;
+
+ map->lock(map->lock_arg);
+
+ map->async = true;
+
+ ret = _regmap_write(map, reg, val);
+
+ map->async = false;
+
+ map->unlock(map->lock_arg);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_write_async);
+
+/**
* regmap_raw_write(): Write raw values to one or more registers
*
* @map: Register map to write to
@@ -1345,7 +1403,7 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
map->lock(map->lock_arg);
- ret = _regmap_raw_write(map, reg, val, val_len, false);
+ ret = _regmap_raw_write(map, reg, val, val_len);
map->unlock(map->lock_arg);
@@ -1369,6 +1427,74 @@ int regmap_field_write(struct regmap_field *field, unsigned int val)
}
EXPORT_SYMBOL_GPL(regmap_field_write);
+/**
+ * regmap_field_update_bits(): Perform a read/modify/write cycle
+ * on the register field
+ *
+ * @field: Register field to write to
+ * @mask: Bitmask to change
+ * @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_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val)
+{
+ mask = (mask << field->shift) & field->mask;
+
+ return regmap_update_bits(field->regmap, field->reg,
+ mask, val << field->shift);
+}
+EXPORT_SYMBOL_GPL(regmap_field_update_bits);
+
+/**
+ * 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);
+
+/**
+ * regmap_fields_update_bits(): Perform a read/modify/write cycle
+ * on the register field
+ *
+ * @field: Register field to write to
+ * @id: port ID
+ * @mask: Bitmask to change
+ * @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_update_bits(struct regmap_field *field, unsigned int id,
+ unsigned int mask, unsigned int val)
+{
+ 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);
+}
+EXPORT_SYMBOL_GPL(regmap_fields_update_bits);
+
/*
* regmap_bulk_write(): Write multiple registers to the device
*
@@ -1418,16 +1544,15 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
*/
if (map->use_single_rw) {
for (i = 0; i < val_count; i++) {
- ret = regmap_raw_write(map,
- reg + (i * map->reg_stride),
- val + (i * val_bytes),
- val_bytes);
+ ret = _regmap_raw_write(map,
+ reg + (i * map->reg_stride),
+ val + (i * val_bytes),
+ val_bytes);
if (ret != 0)
return ret;
}
} else {
- ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count,
- false);
+ ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count);
}
if (val_bytes != 1)
@@ -1439,6 +1564,47 @@ out:
}
EXPORT_SYMBOL_GPL(regmap_bulk_write);
+/*
+ * regmap_multi_reg_write(): Write multiple registers to the device
+ *
+ * where the set of register are supplied in any order
+ *
+ * @map: Register map to write to
+ * @regs: Array of structures containing register,value to be written
+ * @num_regs: Number of registers to write
+ *
+ * This function is intended to be used for writing a large block of data
+ * atomically to the device in single transfer for those I2C client devices
+ * that implement this alternative block write mode.
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_multi_reg_write(struct regmap *map, struct reg_default *regs,
+ int num_regs)
+{
+ int ret = 0, i;
+
+ for (i = 0; i < num_regs; i++) {
+ int reg = regs[i].reg;
+ if (reg % map->reg_stride)
+ return -EINVAL;
+ }
+
+ map->lock(map->lock_arg);
+
+ for (i = 0; i < num_regs; i++) {
+ ret = _regmap_write(map, regs[i].reg, regs[i].def);
+ if (ret != 0)
+ goto out;
+ }
+out:
+ map->unlock(map->lock_arg);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_multi_reg_write);
+
/**
* regmap_raw_write_async(): Write raw values to one or more registers
* asynchronously
@@ -1473,7 +1639,11 @@ int regmap_raw_write_async(struct regmap *map, unsigned int reg,
map->lock(map->lock_arg);
- ret = _regmap_raw_write(map, reg, val, val_len, true);
+ map->async = true;
+
+ ret = _regmap_raw_write(map, reg, val, val_len);
+
+ map->async = false;
map->unlock(map->lock_arg);
@@ -1677,6 +1847,39 @@ int regmap_field_read(struct regmap_field *field, unsigned int *val)
EXPORT_SYMBOL_GPL(regmap_field_read);
/**
+ * regmap_fields_read(): Read a value to a single register field with port ID
+ *
+ * @field: Register field to read from
+ * @id: port ID
+ * @val: Pointer to store read value
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_fields_read(struct regmap_field *field, unsigned int id,
+ unsigned int *val)
+{
+ int ret;
+ unsigned int reg_val;
+
+ if (id >= field->id_size)
+ return -EINVAL;
+
+ ret = regmap_read(field->regmap,
+ field->reg + (field->id_offset * id),
+ &reg_val);
+ if (ret != 0)
+ return ret;
+
+ reg_val &= field->mask;
+ reg_val >>= field->shift;
+ *val = reg_val;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_fields_read);
+
+/**
* regmap_bulk_read(): Read multiple registers from the device
*
* @map: Register map to write to
@@ -1788,6 +1991,41 @@ int regmap_update_bits(struct regmap *map, unsigned int reg,
EXPORT_SYMBOL_GPL(regmap_update_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)
+{
+ bool change;
+ int ret;
+
+ map->lock(map->lock_arg);
+
+ map->async = true;
+
+ ret = _regmap_update_bits(map, reg, mask, val, &change);
+
+ 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
*
@@ -1812,6 +2050,43 @@ int regmap_update_bits_check(struct regmap *map, unsigned int reg,
}
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
+ *
+ * @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
+ *
+ * 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 ret;
+
+ map->lock(map->lock_arg);
+
+ map->async = true;
+
+ ret = _regmap_update_bits(map, reg, mask, val, change);
+
+ map->async = false;
+
+ map->unlock(map->lock_arg);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_update_bits_check_async);
+
void regmap_async_complete_cb(struct regmap_async *async, int ret)
{
struct regmap *map = async->map;
@@ -1820,8 +2095,7 @@ void regmap_async_complete_cb(struct regmap_async *async, int ret)
trace_regmap_async_io_complete(map->dev);
spin_lock(&map->async_lock);
-
- list_del(&async->list);
+ list_move(&async->list, &map->async_free);
wake = list_empty(&map->async_list);
if (ret != 0)
@@ -1829,8 +2103,6 @@ void regmap_async_complete_cb(struct regmap_async *async, int ret)
spin_unlock(&map->async_lock);
- schedule_work(&async->cleanup);
-
if (wake)
wake_up(&map->async_waitq);
}
@@ -1906,6 +2178,7 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
bypass = map->cache_bypass;
map->cache_bypass = true;
+ map->async = true;
/* Write out first; it's useful to apply even if we fail later. */
for (i = 0; i < num_regs; i++) {
@@ -1929,10 +2202,13 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
}
out:
+ map->async = false;
map->cache_bypass = bypass;
map->unlock(map->lock_arg);
+ regmap_async_complete(map);
+
return ret;
}
EXPORT_SYMBOL_GPL(regmap_register_patch);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.