diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/core.c | 95 | ||||
| -rw-r--r-- | drivers/base/memory.c | 44 | ||||
| -rw-r--r-- | drivers/base/node.c | 8 | ||||
| -rw-r--r-- | drivers/base/platform-msi.c | 2 | ||||
| -rw-r--r-- | drivers/base/platform.c | 46 | ||||
| -rw-r--r-- | drivers/base/power/main.c | 348 | ||||
| -rw-r--r-- | drivers/base/power/runtime.c | 6 | ||||
| -rw-r--r-- | drivers/base/power/sysfs.c | 4 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-debugfs.c | 6 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-i2c.c | 61 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-irq.c | 84 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap.c | 23 | ||||
| -rw-r--r-- | drivers/base/swnode.c | 48 |
13 files changed, 431 insertions, 344 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 073045cb214e..de808c5a187b 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -365,6 +365,7 @@ struct device_link *device_link_add(struct device *consumer, link->flags |= DL_FLAG_STATELESS; goto reorder; } else { + link->flags |= DL_FLAG_STATELESS; goto out; } } @@ -433,12 +434,16 @@ struct device_link *device_link_add(struct device *consumer, flags & DL_FLAG_PM_RUNTIME) pm_runtime_resume(supplier); + list_add_tail_rcu(&link->s_node, &supplier->links.consumers); + list_add_tail_rcu(&link->c_node, &consumer->links.suppliers); + if (flags & DL_FLAG_SYNC_STATE_ONLY) { dev_dbg(consumer, "Linked as a sync state only consumer to %s\n", dev_name(supplier)); goto out; } + reorder: /* * Move the consumer and all of the devices depending on it to the end @@ -449,12 +454,9 @@ reorder: */ device_reorder_to_tail(consumer, NULL); - list_add_tail_rcu(&link->s_node, &supplier->links.consumers); - list_add_tail_rcu(&link->c_node, &consumer->links.suppliers); - dev_dbg(consumer, "Linked as a consumer to %s\n", dev_name(supplier)); - out: +out: device_pm_unlock(); device_links_write_unlock(); @@ -829,6 +831,13 @@ static void __device_links_supplier_defer_sync(struct device *sup) list_add_tail(&sup->links.defer_sync, &deferred_sync); } +static void device_link_drop_managed(struct device_link *link) +{ + link->flags &= ~DL_FLAG_MANAGED; + WRITE_ONCE(link->status, DL_STATE_NONE); + kref_put(&link->kref, __device_link_del); +} + /** * device_links_driver_bound - Update device links after probing its driver. * @dev: Device to update the links for. @@ -842,7 +851,7 @@ static void __device_links_supplier_defer_sync(struct device *sup) */ void device_links_driver_bound(struct device *dev) { - struct device_link *link; + struct device_link *link, *ln; LIST_HEAD(sync_list); /* @@ -882,18 +891,35 @@ void device_links_driver_bound(struct device *dev) else __device_links_queue_sync_state(dev, &sync_list); - list_for_each_entry(link, &dev->links.suppliers, c_node) { + list_for_each_entry_safe(link, ln, &dev->links.suppliers, c_node) { + struct device *supplier; + if (!(link->flags & DL_FLAG_MANAGED)) continue; - WARN_ON(link->status != DL_STATE_CONSUMER_PROBE); - WRITE_ONCE(link->status, DL_STATE_ACTIVE); + supplier = link->supplier; + if (link->flags & DL_FLAG_SYNC_STATE_ONLY) { + /* + * When DL_FLAG_SYNC_STATE_ONLY is set, it means no + * other DL_MANAGED_LINK_FLAGS have been set. So, it's + * save to drop the managed link completely. + */ + device_link_drop_managed(link); + } else { + WARN_ON(link->status != DL_STATE_CONSUMER_PROBE); + WRITE_ONCE(link->status, DL_STATE_ACTIVE); + } + /* + * This needs to be done even for the deleted + * DL_FLAG_SYNC_STATE_ONLY device link in case it was the last + * device link that was preventing the supplier from getting a + * sync_state() call. + */ if (defer_sync_state_count) - __device_links_supplier_defer_sync(link->supplier); + __device_links_supplier_defer_sync(supplier); else - __device_links_queue_sync_state(link->supplier, - &sync_list); + __device_links_queue_sync_state(supplier, &sync_list); } dev->links.status = DL_DEV_DRIVER_BOUND; @@ -903,13 +929,6 @@ void device_links_driver_bound(struct device *dev) device_links_flush_sync_list(&sync_list, dev); } -static void device_link_drop_managed(struct device_link *link) -{ - link->flags &= ~DL_FLAG_MANAGED; - WRITE_ONCE(link->status, DL_STATE_NONE); - kref_put(&link->kref, __device_link_del); -} - /** * __device_links_no_driver - Update links of a device without a driver. * @dev: Device without a drvier. @@ -1374,7 +1393,7 @@ static void device_release(struct kobject *kobj) else if (dev->class && dev->class->dev_release) dev->class->dev_release(dev); else - WARN(1, KERN_ERR "Device '%s' does not have a release() function, it is broken and must be fixed. See Documentation/kobject.txt.\n", + WARN(1, KERN_ERR "Device '%s' does not have a release() function, it is broken and must be fixed. See Documentation/core-api/kobject.rst.\n", dev_name(dev)); kfree(p); } @@ -3194,40 +3213,6 @@ error: } /** - * device_create_vargs - creates a device and registers it with sysfs - * @class: pointer to the struct class that this device should be registered to - * @parent: pointer to the parent struct device of this new device, if any - * @devt: the dev_t for the char device to be added - * @drvdata: the data to be added to the device for callbacks - * @fmt: string for the device's name - * @args: va_list for the device's name - * - * This function can be used by char device classes. A struct device - * will be created in sysfs, registered to the specified class. - * - * A "dev" file will be created, showing the dev_t for the device, if - * the dev_t is not 0,0. - * If a pointer to a parent struct device is passed in, the newly created - * struct device will be a child of that device in sysfs. - * The pointer to the struct device will be returned from the call. - * Any further sysfs files that might be required can be created using this - * pointer. - * - * Returns &struct device pointer on success, or ERR_PTR() on error. - * - * Note: the struct class passed to this function must have previously - * been created with a call to class_create(). - */ -struct device *device_create_vargs(struct class *class, struct device *parent, - dev_t devt, void *drvdata, const char *fmt, - va_list args) -{ - return device_create_groups_vargs(class, parent, devt, drvdata, NULL, - fmt, args); -} -EXPORT_SYMBOL_GPL(device_create_vargs); - -/** * device_create - creates a device and registers it with sysfs * @class: pointer to the struct class that this device should be registered to * @parent: pointer to the parent struct device of this new device, if any @@ -3258,7 +3243,8 @@ struct device *device_create(struct class *class, struct device *parent, struct device *dev; va_start(vargs, fmt); - dev = device_create_vargs(class, parent, devt, drvdata, fmt, vargs); + dev = device_create_groups_vargs(class, parent, devt, drvdata, NULL, + fmt, vargs); va_end(vargs); return dev; } @@ -3896,6 +3882,7 @@ void set_secondary_fwnode(struct device *dev, struct fwnode_handle *fwnode) else dev->fwnode = fwnode; } +EXPORT_SYMBOL_GPL(set_secondary_fwnode); /** * device_set_of_node_from_dev - reuse device-tree node of another device diff --git a/drivers/base/memory.c b/drivers/base/memory.c index dbec3a05590a..2b09b68b9f78 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -21,6 +21,7 @@ #include <linux/mm.h> #include <linux/stat.h> #include <linux/slab.h> +#include <linux/xarray.h> #include <linux/atomic.h> #include <linux/uaccess.h> @@ -74,6 +75,13 @@ static struct bus_type memory_subsys = { .offline = memory_subsys_offline, }; +/* + * Memory blocks are cached in a local radix tree to avoid + * a costly linear search for the corresponding device on + * the subsystem bus. + */ +static DEFINE_XARRAY(memory_blocks); + static BLOCKING_NOTIFIER_HEAD(memory_chain); int register_memory_notifier(struct notifier_block *nb) @@ -489,22 +497,23 @@ int __weak arch_get_memory_phys_device(unsigned long start_pfn) return 0; } -/* A reference for the returned memory block device is acquired. */ +/* + * A reference for the returned memory block device is acquired. + * + * Called under device_hotplug_lock. + */ static struct memory_block *find_memory_block_by_id(unsigned long block_id) { - struct device *dev; + struct memory_block *mem; - dev = subsys_find_device_by_id(&memory_subsys, block_id, NULL); - return dev ? to_memory_block(dev) : NULL; + mem = xa_load(&memory_blocks, block_id); + if (mem) + get_device(&mem->dev); + return mem; } /* - * For now, we have a linear search to go find the appropriate - * memory_block corresponding to a particular phys_index. If - * this gets to be a real problem, we can always use a radix - * tree or something here. - * - * This could be made generic for all device subsystems. + * Called under device_hotplug_lock. */ struct memory_block *find_memory_block(struct mem_section *section) { @@ -548,9 +557,16 @@ int register_memory(struct memory_block *memory) memory->dev.offline = memory->state == MEM_OFFLINE; ret = device_register(&memory->dev); - if (ret) + if (ret) { put_device(&memory->dev); - + return ret; + } + ret = xa_err(xa_store(&memory_blocks, memory->dev.id, memory, + GFP_KERNEL)); + if (ret) { + put_device(&memory->dev); + device_unregister(&memory->dev); + } return ret; } @@ -604,6 +620,8 @@ static void unregister_memory(struct memory_block *memory) if (WARN_ON_ONCE(memory->dev.bus != &memory_subsys)) return; + WARN_ON(xa_erase(&memory_blocks, memory->dev.id) == NULL); + /* drop the ref. we got via find_memory_block() */ put_device(&memory->dev); device_unregister(&memory->dev); @@ -750,6 +768,8 @@ void __init memory_dev_init(void) * * In case func() returns an error, walking is aborted and the error is * returned. + * + * Called under device_hotplug_lock. */ int walk_memory_blocks(unsigned long start, unsigned long size, void *arg, walk_memory_blocks_func_t func) diff --git a/drivers/base/node.c b/drivers/base/node.c index 10d7e818e118..5b02f69769e8 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -415,6 +415,9 @@ static ssize_t node_read_meminfo(struct device *dev, "Node %d AnonPages: %8lu kB\n" "Node %d Shmem: %8lu kB\n" "Node %d KernelStack: %8lu kB\n" +#ifdef CONFIG_SHADOW_CALL_STACK + "Node %d ShadowCallStack:%8lu kB\n" +#endif "Node %d PageTables: %8lu kB\n" "Node %d NFS_Unstable: %8lu kB\n" "Node %d Bounce: %8lu kB\n" @@ -438,8 +441,11 @@ static ssize_t node_read_meminfo(struct device *dev, nid, K(node_page_state(pgdat, NR_ANON_MAPPED)), nid, K(i.sharedram), nid, sum_zone_node_page_state(nid, NR_KERNEL_STACK_KB), +#ifdef CONFIG_SHADOW_CALL_STACK + nid, sum_zone_node_page_state(nid, NR_KERNEL_SCS_KB), +#endif nid, K(sum_zone_node_page_state(nid, NR_PAGETABLE)), - nid, K(node_page_state(pgdat, NR_UNSTABLE_NFS)), + nid, 0UL, nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)), nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)), nid, K(sreclaimable + diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c index 8da314b81eab..c4a17e5edf8b 100644 --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -387,7 +387,7 @@ void platform_msi_domain_free(struct irq_domain *domain, unsigned int virq, * * @domain: The platform-msi domain * @virq: The base irq from which to perform the allocate operation - * @nvec: How many interrupts to free from @virq + * @nr_irqs: How many interrupts to free from @virq * * Return 0 on success, or an error code on failure. Must be called * with irq_domain_mutex held (which can only be done as part of a diff --git a/drivers/base/platform.c b/drivers/base/platform.c index b27d0f6c18c9..4b49641effa1 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -147,28 +147,30 @@ EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname); * request_irq() APIs. This is the same as platform_get_irq(), except that it * does not print an error message if an IRQ can not be obtained. * - * Example: + * For example:: + * * int irq = platform_get_irq_optional(pdev, 0); * if (irq < 0) * return irq; * - * Return: IRQ number on success, negative error number on failure. + * Return: non-zero IRQ number on success, negative error number on failure. */ int platform_get_irq_optional(struct platform_device *dev, unsigned int num) { + int ret; #ifdef CONFIG_SPARC /* sparc does not have irqs represented as IORESOURCE_IRQ resources */ if (!dev || num >= dev->archdata.num_irqs) return -ENXIO; - return dev->archdata.irqs[num]; + ret = dev->archdata.irqs[num]; + goto out; #else struct resource *r; - int ret; if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) { ret = of_irq_get(dev->dev.of_node, num); if (ret > 0 || ret == -EPROBE_DEFER) - return ret; + goto out; } r = platform_get_resource(dev, IORESOURCE_IRQ, num); @@ -176,7 +178,7 @@ int platform_get_irq_optional(struct platform_device *dev, unsigned int num) if (r && r->flags & IORESOURCE_DISABLED) { ret = acpi_irq_get(ACPI_HANDLE(&dev->dev), num, r); if (ret) - return ret; + goto out; } } @@ -190,13 +192,17 @@ int platform_get_irq_optional(struct platform_device *dev, unsigned int num) struct irq_data *irqd; irqd = irq_get_irq_data(r->start); - if (!irqd) - return -ENXIO; + if (!irqd) { + ret = -ENXIO; + goto out; + } irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS); } - if (r) - return r->start; + if (r) { + ret = r->start; + goto out; + } /* * For the index 0 interrupt, allow falling back to GpioInt @@ -209,11 +215,14 @@ int platform_get_irq_optional(struct platform_device *dev, unsigned int num) ret = acpi_dev_gpio_irq_get(ACPI_COMPANION(&dev->dev), num); /* Our callers expect -ENXIO for missing IRQs. */ if (ret >= 0 || ret == -EPROBE_DEFER) - return ret; + goto out; } - return -ENXIO; + ret = -ENXIO; #endif +out: + WARN(ret == 0, "0 is an invalid IRQ number\n"); + return ret; } EXPORT_SYMBOL_GPL(platform_get_irq_optional); @@ -226,12 +235,13 @@ EXPORT_SYMBOL_GPL(platform_get_irq_optional); * IRQ fails. Device drivers should check the return value for errors so as to * not pass a negative integer value to the request_irq() APIs. * - * Example: + * For example:: + * * int irq = platform_get_irq(pdev, 0); * if (irq < 0) * return irq; * - * Return: IRQ number on success, negative error number on failure. + * Return: non-zero IRQ number on success, negative error number on failure. */ int platform_get_irq(struct platform_device *dev, unsigned int num) { @@ -303,8 +313,10 @@ static int __platform_get_irq_byname(struct platform_device *dev, } r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name); - if (r) + if (r) { + WARN(r->start == 0, "0 is an invalid IRQ number\n"); return r->start; + } return -ENXIO; } @@ -316,7 +328,7 @@ static int __platform_get_irq_byname(struct platform_device *dev, * * Get an IRQ like platform_get_irq(), but then by name rather then by index. * - * Return: IRQ number on success, negative error number on failure. + * Return: non-zero IRQ number on success, negative error number on failure. */ int platform_get_irq_byname(struct platform_device *dev, const char *name) { @@ -338,7 +350,7 @@ EXPORT_SYMBOL_GPL(platform_get_irq_byname); * Get an optional IRQ by name like platform_get_irq_byname(). Except that it * does not print an error message if an IRQ can not be obtained. * - * Return: IRQ number on success, negative error number on failure. + * Return: non-zero IRQ number on success, negative error number on failure. */ int platform_get_irq_byname_optional(struct platform_device *dev, const char *name) diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 0e07e17c2def..bb98b813554f 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -562,72 +562,26 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd) /*------------------------- Resume routines -------------------------*/ /** - * suspend_event - Return a "suspend" message for given "resume" one. - * @resume_msg: PM message representing a system-wide resume transition. - */ -static pm_message_t suspend_event(pm_message_t resume_msg) -{ - switch (resume_msg.event) { - case PM_EVENT_RESUME: - return PMSG_SUSPEND; - case PM_EVENT_THAW: - case PM_EVENT_RESTORE: - return PMSG_FREEZE; - case PM_EVENT_RECOVER: - return PMSG_HIBERNATE; - } - return PMSG_ON; -} - -/** - * dev_pm_may_skip_resume - System-wide device resume optimization check. + * dev_pm_skip_resume - System-wide device resume optimization check. * @dev: Target device. * - * Checks whether or not the device may be left in suspend after a system-wide - * transition to the working state. + * Return: + * - %false if the transition under way is RESTORE. + * - Return value of dev_pm_skip_suspend() if the transition under way is THAW. + * - The logical negation of %power.must_resume otherwise (that is, when the + * transition under way is RESUME). */ -bool dev_pm_may_skip_resume(struct device *dev) +bool dev_pm_skip_resume(struct device *dev) { - return !dev->power.must_resume && pm_transition.event != PM_EVENT_RESTORE; -} - -static pm_callback_t dpm_subsys_resume_noirq_cb(struct device *dev, - pm_message_t state, - const char **info_p) -{ - pm_callback_t callback; - const char *info; - - if (dev->pm_domain) { - info = "noirq power domain "; - callback = pm_noirq_op(&dev->pm_domain->ops, state); - } else if (dev->type && dev->type->pm) { - info = "noirq type "; - callback = pm_noirq_op(dev->type->pm, state); - } else if (dev->class && dev->class->pm) { - info = "noirq class "; - callback = pm_noirq_op(dev->class->pm, state); - } else if (dev->bus && dev->bus->pm) { - info = "noirq bus "; - callback = pm_noirq_op(dev->bus->pm, state); - } else { - return NULL; - } + if (pm_transition.event == PM_EVENT_RESTORE) + return false; - if (info_p) - *info_p = info; + if (pm_transition.event == PM_EVENT_THAW) + return dev_pm_skip_suspend(dev); - return callback; + return !dev->power.must_resume; } -static pm_callback_t dpm_subsys_suspend_noirq_cb(struct device *dev, - pm_message_t state, - const char **info_p); - -static pm_callback_t dpm_subsys_suspend_late_cb(struct device *dev, - pm_message_t state, - const char **info_p); - /** * device_resume_noirq - Execute a "noirq resume" callback for given device. * @dev: Device to handle. @@ -639,8 +593,8 @@ static pm_callback_t dpm_subsys_suspend_late_cb(struct device *dev, */ static int device_resume_noirq(struct device *dev, pm_message_t state, bool async) { - pm_callback_t callback; - const char *info; + pm_callback_t callback = NULL; + const char *info = NULL; bool skip_resume; int error = 0; @@ -656,37 +610,41 @@ static int device_resume_noirq(struct device *dev, pm_message_t state, bool asyn if (!dpm_wait_for_superior(dev, async)) goto Out; - skip_resume = dev_pm_may_skip_resume(dev); + skip_resume = dev_pm_skip_resume(dev); + /* + * If the driver callback is skipped below or by the middle layer + * callback and device_resume_early() also skips the driver callback for + * this device later, it needs to appear as "suspended" to PM-runtime, + * so change its status accordingly. + * + * Otherwise, the device is going to be resumed, so set its PM-runtime + * status to "active", but do that only if DPM_FLAG_SMART_SUSPEND is set + * to avoid confusing drivers that don't use it. + */ + if (skip_resume) + pm_runtime_set_suspended(dev); + else if (dev_pm_skip_suspend(dev)) + pm_runtime_set_active(dev); - callback = dpm_subsys_resume_noirq_cb(dev, state, &info); + if (dev->pm_domain) { + info = "noirq power domain "; + callback = pm_noirq_op(&dev->pm_domain->ops, state); + } else if (dev->type && dev->type->pm) { + info = "noirq type "; + callback = pm_noirq_op(dev->type->pm, state); + } else if (dev->class && dev->class->pm) { + info = "noirq class "; + callback = pm_noirq_op(dev->class->pm, state); + } else if (dev->bus && dev->bus->pm) { + info = "noirq bus "; + callback = pm_noirq_op(dev->bus->pm, state); + } if (callback) goto Run; if (skip_resume) goto Skip; - if (dev_pm_smart_suspend_and_suspended(dev)) { - pm_message_t suspend_msg = suspend_event(state); - - /* - * If "freeze" callbacks have been skipped during a transition - * related to hibernation, the subsequent "thaw" callbacks must - * be skipped too or bad things may happen. Otherwise, resume - * callbacks are going to be run for the device, so its runtime - * PM status must be changed to reflect the new state after the - * transition under way. - */ - if (!dpm_subsys_suspend_late_cb(dev, suspend_msg, NULL) && - !dpm_subsys_suspend_noirq_cb(dev, suspend_msg, NULL)) { - if (state.event == PM_EVENT_THAW) { - skip_resume = true; - goto Skip; - } else { - pm_runtime_set_active(dev); - } - } - } - if (dev->driver && dev->driver->pm) { info = "noirq driver "; callback = pm_noirq_op(dev->driver->pm, state); @@ -698,20 +656,6 @@ Run: Skip: dev->power.is_noirq_suspended = false; - if (skip_resume) { - /* Make the next phases of resume skip the device. */ - dev->power.is_late_suspended = false; - dev->power.is_suspended = false; - /* - * The device is going to be left in suspend, but it might not - * have been in runtime suspend before the system suspended, so - * its runtime PM status needs to be updated to avoid confusing - * the runtime PM framework when runtime PM is enabled for the - * device again. - */ - pm_runtime_set_suspended(dev); - } - Out: complete_all(&dev->power.completion); TRACE_RESUME(error); @@ -810,35 +754,6 @@ void dpm_resume_noirq(pm_message_t state) cpuidle_resume(); } -static pm_callback_t dpm_subsys_resume_early_cb(struct device *dev, - pm_message_t state, - const char **info_p) -{ - pm_callback_t callback; - const char *info; - - if (dev->pm_domain) { - info = "early power domain "; - callback = pm_late_early_op(&dev->pm_domain->ops, state); - } else if (dev->type && dev->type->pm) { - info = "early type "; - callback = pm_late_early_op(dev->type->pm, state); - } else if (dev->class && dev->class->pm) { - info = "early class "; - callback = pm_late_early_op(dev->class->pm, state); - } else if (dev->bus && dev->bus->pm) { - info = "early bus "; - callback = pm_late_early_op(dev->bus->pm, state); - } else { - return NULL; - } - - if (info_p) - *info_p = info; - - return callback; -} - /** * device_resume_early - Execute an "early resume" callback for given device. * @dev: Device to handle. @@ -849,8 +764,8 @@ static pm_callback_t dpm_subsys_resume_early_cb(struct device *dev, */ static int device_resume_early(struct device *dev, pm_message_t state, bool async) { - pm_callback_t callback; - const char *info; + pm_callback_t callback = NULL; + const char *info = NULL; int error = 0; TRACE_DEVICE(dev); @@ -865,17 +780,37 @@ static int device_resume_early(struct device *dev, pm_message_t state, bool asyn if (!dpm_wait_for_superior(dev, async)) goto Out; - callback = dpm_subsys_resume_early_cb(dev, state, &info); + if (dev->pm_domain) { + info = "early power domain "; + callback = pm_late_early_op(&dev->pm_domain->ops, state); + } else if (dev->type && dev->type->pm) { + info = "early type "; + callback = pm_late_early_op(dev->type->pm, state); + } else if (dev->class && dev->class->pm) { + info = "early class "; + callback = pm_late_early_op(dev->class->pm, state); + } else if (dev->bus && dev->bus->pm) { + info = "early bus "; + callback = pm_late_early_op(dev->bus->pm, state); + } + if (callback) + goto Run; + + if (dev_pm_skip_resume(dev)) + goto Skip; - if (!callback && dev->driver && dev->driver->pm) { + if (dev->driver && dev->driver->pm) { info = "early driver "; callback = pm_late_early_op(dev->driver->pm, state); } +Run: error = dpm_run_callback(callback, dev, state, info); + +Skip: dev->power.is_late_suspended = false; - Out: +Out: TRACE_RESUME(error); pm_runtime_enable(dev); @@ -1245,61 +1180,6 @@ static void dpm_superior_set_must_resume(struct device *dev) device_links_read_unlock(idx); } -static pm_callback_t dpm_subsys_suspend_noirq_cb(struct device *dev, - pm_message_t state, - const char **info_p) -{ - pm_callback_t callback; - const char *info; - - if (dev->pm_domain) { - info = "noirq power domain "; - callback = pm_noirq_op(&dev->pm_domain->ops, state); - } else if (dev->type && dev->type->pm) { - info = "noirq type "; - callback = pm_noirq_op(dev->type->pm, state); - } else if (dev->class && dev->class->pm) { - info = "noirq class "; - callback = pm_noirq_op(dev->class->pm, state); - } else if (dev->bus && dev->bus->pm) { - info = "noirq bus "; - callback = pm_noirq_op(dev->bus->pm, state); - } else { - return NULL; - } - - if (info_p) - *info_p = info; - - return callback; -} - -static bool device_must_resume(struct device *dev, pm_message_t state, - bool no_subsys_suspend_noirq) -{ - pm_message_t resume_msg = resume_event(state); - - /* - * If all of the device driver's "noirq", "late" and "early" callbacks - * are invoked directly by the core, the decision to allow the device to - * stay in suspend can be based on its current runtime PM status and its - * wakeup settings. - */ - if (no_subsys_suspend_noirq && - !dpm_subsys_suspend_late_cb(dev, state, NULL) && - !dpm_subsys_resume_early_cb(dev, resume_msg, NULL) && - !dpm_subsys_resume_noirq_cb(dev, resume_msg, NULL)) - return !pm_runtime_status_suspended(dev) && - (resume_msg.event != PM_EVENT_RESUME || - (device_can_wakeup(dev) && !device_may_wakeup(dev))); - - /* - * The only safe strategy here is to require that if the device may not - * be left in suspend, resume callbacks must be invoked for it. - */ - return !dev->power.may_skip_resume; -} - /** * __device_suspend_noirq - Execute a "noirq suspend" callback for given device. * @dev: Device to handle. @@ -1311,9 +1191,8 @@ static bool device_must_resume(struct device *dev, pm_message_t state, */ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool async) { - pm_callback_t callback; - const char *info; - bool no_subsys_cb = false; + pm_callback_t callback = NULL; + const char *info = NULL; int error = 0; TRACE_DEVICE(dev); @@ -1327,13 +1206,23 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a if (dev->power.syscore || dev->power.direct_complete) goto Complete; - callback = dpm_subsys_suspend_noirq_cb(dev, state, &info); + if (dev->pm_domain) { + info = "noirq power domain "; + callback = pm_noirq_op(&dev->pm_domain->ops, state); + } else if (dev->type && dev->type->pm) { + info = "noirq type "; + callback = pm_noirq_op(dev->type->pm, state); + } else if (dev->class && dev->class->pm) { + info = "noirq class "; + callback = pm_noirq_op(dev->class->pm, state); + } else if (dev->bus && dev->bus->pm) { + info = "noirq bus "; + callback = pm_noirq_op(dev->bus->pm, state); + } if (callback) goto Run; - no_subsys_cb = !dpm_subsys_suspend_late_cb(dev, state, NULL); - - if (dev_pm_smart_suspend_and_suspended(dev) && no_subsys_cb) + if (dev_pm_skip_suspend(dev)) goto Skip; if (dev->driver && dev->driver->pm) { @@ -1351,13 +1240,16 @@ Run: Skip: dev->power.is_noirq_suspended = true; - if (dev_pm_test_driver_flags(dev, DPM_FLAG_LEAVE_SUSPENDED)) { - dev->power.must_resume = dev->power.must_resume || - atomic_read(&dev->power.usage_count) > 1 || - device_must_resume(dev, state, no_subsys_cb); - } else { + /* + * Skipping the resume of devices that were in use right before the + * system suspend (as indicated by their PM-runtime usage counters) + * would be suboptimal. Also resume them if doing that is not allowed + * to be skipped. + */ + if (atomic_read(&dev->power.usage_count) > 1 || + !(dev_pm_test_driver_flags(dev, DPM_FLAG_MAY_SKIP_RESUME) && + dev->power.may_skip_resume)) dev->power.must_resume = true; - } if (dev->power.must_resume) dpm_superior_set_must_resume(dev); @@ -1474,35 +1366,6 @@ static void dpm_propagate_wakeup_to_parent(struct device *dev) spin_unlock_irq(&parent->power.lock); } -static pm_callback_t dpm_subsys_suspend_late_cb(struct device *dev, - pm_message_t state, - const char **info_p) -{ - pm_callback_t callback; - const char *info; - - if (dev->pm_domain) { - info = "late power domain "; - callback = pm_late_early_op(&dev->pm_domain->ops, state); - } else if (dev->type && dev->type->pm) { - info = "late type "; - callback = pm_late_early_op(dev->type->pm, state); - } else if (dev->class && dev->class->pm) { - info = "late class "; - callback = pm_late_early_op(dev->class->pm, state); - } else if (dev->bus && dev->bus->pm) { - info = "late bus "; - callback = pm_late_early_op(dev->bus->pm, state); - } else { - return NULL; - } - - if (info_p) - *info_p = info; - - return callback; -} - /** * __device_suspend_late - Execute a "late suspend" callback for given device. * @dev: Device to handle. @@ -1513,8 +1376,8 @@ static pm_callback_t dpm_subsys_suspend_late_cb(struct device *dev, */ static int __device_suspend_late(struct device *dev, pm_message_t state, bool async) { - pm_callback_t callback; - const char *info; + pm_callback_t callback = NULL; + const char *info = NULL; int error = 0; TRACE_DEVICE(dev); @@ -1535,12 +1398,23 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as if (dev->power.syscore || dev->power.direct_complete) goto Complete; - callback = dpm_subsys_suspend_late_cb(dev, state, &info); + if (dev->pm_domain) { + info = "late power domain "; + callback = pm_late_early_op(&dev->pm_domain->ops, state); + } else if (dev->type && dev->type->pm) { + info = "late type "; + callback = pm_late_early_op(dev->type->pm, state); + } else if (dev->class && dev->class->pm) { + info = "late class "; + callback = pm_late_early_op(dev->class->pm, state); + } else if (dev->bus && dev->bus->pm) { + info = "late bus "; + callback = pm_late_early_op(dev->bus->pm, state); + } if (callback) goto Run; - if (dev_pm_smart_suspend_and_suspended(dev) && - !dpm_subsys_suspend_noirq_cb(dev, state, NULL)) + if (dev_pm_skip_suspend(dev)) goto Skip; if (dev->driver && dev->driver->pm) { @@ -1766,7 +1640,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async) dev->power.direct_complete = false; } - dev->power.may_skip_resume = false; + dev->power.may_skip_resume = true; dev->power.must_resume = false; dpm_watchdog_set(&wd, dev); @@ -1970,7 +1844,7 @@ unlock: spin_lock_irq(&dev->power.lock); dev->power.direct_complete = state.event == PM_EVENT_SUSPEND && (ret > 0 || dev->power.no_pm_callbacks) && - !dev_pm_test_driver_flags(dev, DPM_FLAG_NEVER_SKIP); + !dev_pm_test_driver_flags(dev, DPM_FLAG_NO_DIRECT_COMPLETE); spin_unlock_irq(&dev->power.lock); return 0; } @@ -2128,7 +2002,7 @@ void device_pm_check_callbacks(struct device *dev) spin_unlock_irq(&dev->power.lock); } -bool dev_pm_smart_suspend_and_suspended(struct device *dev) +bool dev_pm_skip_suspend(struct device *dev) { return dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) && pm_runtime_status_suspended(dev); diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 99c7da112c95..9f62790f644c 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -523,13 +523,11 @@ static int rpm_suspend(struct device *dev, int rpmflags) repeat: retval = rpm_check_suspend_allowed(dev); - if (retval < 0) - ; /* Conditions are wrong. */ + goto out; /* Conditions are wrong. */ /* Synchronous suspends are not allowed in the RPM_RESUMING state. */ - else if (dev->power.runtime_status == RPM_RESUMING && - !(rpmflags & RPM_ASYNC)) + if (dev->power.runtime_status == RPM_RESUMING && !(rpmflags & RPM_ASYNC)) retval = -EAGAIN; if (retval) goto out; diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index 2b99fe1eb207..24d25cf8ab14 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -666,7 +666,7 @@ int dpm_sysfs_add(struct device *dev) if (rc) return rc; - if (pm_runtime_callbacks_present(dev)) { + if (!pm_runtime_has_no_callbacks(dev)) { rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group); if (rc) goto err_out; @@ -709,7 +709,7 @@ int dpm_sysfs_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid) if (rc) return rc; - if (pm_runtime_callbacks_present(dev)) { + if (!pm_runtime_has_no_callbacks(dev)) { rc = sysfs_group_change_owner( &dev->kobj, &pm_runtime_attr_group, kuid, kgid); if (rc) diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index e72843fe41df..089e5dc7144a 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -227,6 +227,9 @@ static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from, if (*ppos < 0 || !count) return -EINVAL; + if (count > (PAGE_SIZE << (MAX_ORDER - 1))) + count = PAGE_SIZE << (MAX_ORDER - 1); + buf = kmalloc(count, GFP_KERNEL); if (!buf) return -ENOMEM; @@ -371,6 +374,9 @@ static ssize_t regmap_reg_ranges_read_file(struct file *file, if (*ppos < 0 || !count) return -EINVAL; + if (count > (PAGE_SIZE << (MAX_ORDER - 1))) + count = PAGE_SIZE << (MAX_ORDER - 1); + buf = kmalloc(count, GFP_KERNEL); if (!buf) return -ENOMEM; diff --git a/drivers/base/regmap/regmap-i2c.c b/drivers/base/regmap/regmap-i2c.c index 008f8da69d97..62b95a9212ae 100644 --- a/drivers/base/regmap/regmap-i2c.c +++ b/drivers/base/regmap/regmap-i2c.c @@ -246,6 +246,63 @@ static const struct regmap_bus regmap_i2c_smbus_i2c_block = { .max_raw_write = I2C_SMBUS_BLOCK_MAX, }; +static int regmap_i2c_smbus_i2c_write_reg16(void *context, const void *data, + size_t count) +{ + struct device *dev = context; + struct i2c_client *i2c = to_i2c_client(dev); + + if (count < 2) + return -EINVAL; + + count--; + return i2c_smbus_write_i2c_block_data(i2c, ((u8 *)data)[0], count, + (u8 *)data + 1); +} + +static int regmap_i2c_smbus_i2c_read_reg16(void *context, const void *reg, + size_t reg_size, void *val, + size_t val_size) +{ + struct device *dev = context; + struct i2c_client *i2c = to_i2c_client(dev); + int ret, count, len = val_size; + + if (reg_size != 2) + return -EINVAL; + + ret = i2c_smbus_write_byte_data(i2c, ((u16 *)reg)[0] & 0xff, + ((u16 *)reg)[0] >> 8); + if (ret < 0) + return ret; + + count = 0; + do { + /* Current Address Read */ + ret = i2c_smbus_read_byte(i2c); + if (ret < 0) + break; + + *((u8 *)val++) = ret; + count++; + len--; + } while (len > 0); + + if (count == val_size) + return 0; + else if (ret < 0) + return ret; + else + return -EIO; +} + +static const struct regmap_bus regmap_i2c_smbus_i2c_block_reg16 = { + .write = regmap_i2c_smbus_i2c_write_reg16, + .read = regmap_i2c_smbus_i2c_read_reg16, + .max_raw_read = I2C_SMBUS_BLOCK_MAX, + .max_raw_write = I2C_SMBUS_BLOCK_MAX, +}; + static const struct regmap_bus *regmap_get_i2c_bus(struct i2c_client *i2c, const struct regmap_config *config) { @@ -255,6 +312,10 @@ static const struct regmap_bus *regmap_get_i2c_bus(struct i2c_client *i2c, i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) return ®map_i2c_smbus_i2c_block; + else if (config->val_bits == 8 && config->reg_bits == 16 && + i2c_check_functionality(i2c->adapter, + I2C_FUNC_SMBUS_I2C_BLOCK)) + return ®map_i2c_smbus_i2c_block_reg16; else if (config->val_bits == 16 && config->reg_bits == 8 && i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_WORD_DATA)) diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 3d64c9331a82..4340e1d268b6 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -541,8 +541,9 @@ static const struct irq_domain_ops regmap_domain_ops = { }; /** - * regmap_add_irq_chip() - Use standard regmap IRQ controller handling + * regmap_add_irq_chip_np() - Use standard regmap IRQ controller handling * + * @np: The device_node where the IRQ domain should be added 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. @@ -556,9 +557,10 @@ static const struct irq_domain_ops regmap_domain_ops = { * register cache. The chip driver is responsible for restoring the * register values used by the IRQ controller over suspend and resume. */ -int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags, - int irq_base, const struct regmap_irq_chip *chip, - struct regmap_irq_chip_data **data) +int regmap_add_irq_chip_np(struct device_node *np, 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 *d; int i; @@ -769,12 +771,10 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags, } if (irq_base) - d->domain = irq_domain_add_legacy(map->dev->of_node, - chip->num_irqs, irq_base, 0, - ®map_domain_ops, d); + d->domain = irq_domain_add_legacy(np, chip->num_irqs, irq_base, + 0, ®map_domain_ops, d); else - d->domain = irq_domain_add_linear(map->dev->of_node, - chip->num_irqs, + d->domain = irq_domain_add_linear(np, chip->num_irqs, ®map_domain_ops, d); if (!d->domain) { dev_err(map->dev, "Failed to create IRQ domain\n"); @@ -808,6 +808,30 @@ err_alloc: kfree(d); return ret; } +EXPORT_SYMBOL_GPL(regmap_add_irq_chip_np); + +/** + * regmap_add_irq_chip() - Use standard regmap IRQ controller handling + * + * @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. + * @irq_base: Allocate at specific IRQ number if irq_base > 0. + * @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. + * + * This is the same as regmap_add_irq_chip_np, except that the device + * node of the regmap is used. + */ +int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags, + int irq_base, const struct regmap_irq_chip *chip, + struct regmap_irq_chip_data **data) +{ + return regmap_add_irq_chip_np(map->dev->of_node, map, irq, irq_flags, + irq_base, chip, data); +} EXPORT_SYMBOL_GPL(regmap_add_irq_chip); /** @@ -875,9 +899,10 @@ static int devm_regmap_irq_chip_match(struct device *dev, void *res, void *data) } /** - * devm_regmap_add_irq_chip() - Resource manager regmap_add_irq_chip() + * devm_regmap_add_irq_chip_np() - Resource manager regmap_add_irq_chip_np() * * @dev: The device pointer on which irq_chip belongs to. + * @np: The device_node where the IRQ domain should be added 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. @@ -890,10 +915,11 @@ static int devm_regmap_irq_chip_match(struct device *dev, void *res, void *data) * The ®map_irq_chip_data will be automatically 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) +int devm_regmap_add_irq_chip_np(struct device *dev, struct device_node *np, + 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; @@ -903,8 +929,8 @@ int devm_regmap_add_irq_chip(struct device *dev, struct regmap *map, int irq, if (!ptr) return -ENOMEM; - ret = regmap_add_irq_chip(map, irq, irq_flags, irq_base, - chip, &d); + ret = regmap_add_irq_chip_np(np, map, irq, irq_flags, irq_base, + chip, &d); if (ret < 0) { devres_free(ptr); return ret; @@ -915,6 +941,32 @@ int devm_regmap_add_irq_chip(struct device *dev, struct regmap *map, int irq, *data = d; return 0; } +EXPORT_SYMBOL_GPL(devm_regmap_add_irq_chip_np); + +/** + * 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. + * @irq_base: Allocate at specific IRQ number if irq_base > 0. + * @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 ®map_irq_chip_data will be automatically 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) +{ + return devm_regmap_add_irq_chip_np(dev, map->dev->of_node, map, irq, + irq_flags, irq_base, chip, data); +} EXPORT_SYMBOL_GPL(devm_regmap_add_irq_chip); /** diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 59f911e57719..c472f624382d 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -827,6 +827,7 @@ struct regmap *__regmap_init(struct device *dev, } else if (!bus->read || !bus->write) { map->reg_read = _regmap_bus_reg_read; map->reg_write = _regmap_bus_reg_write; + map->reg_update_bits = bus->reg_update_bits; map->defer_caching = false; goto skip_format_initialization; @@ -2936,6 +2937,28 @@ int regmap_update_bits_base(struct regmap *map, unsigned int reg, } EXPORT_SYMBOL_GPL(regmap_update_bits_base); +/** + * regmap_test_bits() - Check if all specified bits are set in a register. + * + * @map: Register map to operate on + * @reg: Register to read from + * @bits: Bits to test + * + * Returns -1 if the underlying regmap_read() fails, 0 if at least one of the + * tested bits is not set and 1 if all tested bits are set. + */ +int regmap_test_bits(struct regmap *map, unsigned int reg, unsigned int bits) +{ + unsigned int val, ret; + + ret = regmap_read(map, reg, &val); + if (ret) + return ret; + + return (val & bits) == bits; +} +EXPORT_SYMBOL_GPL(regmap_test_bits); + void regmap_async_complete_cb(struct regmap_async *async, int ret) { struct regmap *map = async->map; diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index de8d3543e8fe..2079937ddb51 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -727,6 +727,54 @@ void software_node_unregister_nodes(const struct software_node *nodes) EXPORT_SYMBOL_GPL(software_node_unregister_nodes); /** + * software_node_register_node_group - Register a group of software nodes + * @node_group: NULL terminated array of software node pointers to be registered + * + * Register multiple software nodes at once. + */ +int software_node_register_node_group(const struct software_node **node_group) +{ + unsigned int i; + int ret; + + if (!node_group) + return 0; + + for (i = 0; node_group[i]; i++) { + ret = software_node_register(node_group[i]); + if (ret) { + software_node_unregister_node_group(node_group); + return ret; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(software_node_register_node_group); + +/** + * software_node_unregister_node_group - Unregister a group of software nodes + * @node_group: NULL terminated array of software node pointers to be unregistered + * + * Unregister multiple software nodes at once. + */ +void software_node_unregister_node_group(const struct software_node **node_group) +{ + struct swnode *swnode; + unsigned int i; + + if (!node_group) + return; + + for (i = 0; node_group[i]; i++) { + swnode = software_node_to_swnode(node_group[i]); + if (swnode) + fwnode_remove_software_node(&swnode->fwnode); + } +} +EXPORT_SYMBOL_GPL(software_node_unregister_node_group); + +/** * software_node_register - Register static software node * @node: The software node to be registered */ |