diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/base/base.h | 2 | ||||
| -rw-r--r-- | drivers/base/dd.c | 6 | ||||
| -rw-r--r-- | drivers/base/firmware_class.c | 5 | ||||
| -rw-r--r-- | drivers/base/platform.c | 138 | ||||
| -rw-r--r-- | drivers/base/power/Makefile | 4 | ||||
| -rw-r--r-- | drivers/base/power/clock_ops.c | 431 | ||||
| -rw-r--r-- | drivers/base/power/generic_ops.c | 39 | ||||
| -rw-r--r-- | drivers/base/power/main.c | 83 | ||||
| -rw-r--r-- | drivers/base/power/runtime.c | 29 | ||||
| -rw-r--r-- | drivers/base/power/sysfs.c | 4 | ||||
| -rw-r--r-- | drivers/base/power/wakeup.c | 3 | ||||
| -rw-r--r-- | drivers/base/sys.c | 202 | ||||
| -rw-r--r-- | drivers/base/syscore.c | 2 |
14 files changed, 562 insertions, 393 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index e9e5238f310..d57e8d0fb82 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -168,11 +168,4 @@ config SYS_HYPERVISOR bool default n -config ARCH_NO_SYSDEV_OPS - bool - ---help--- - To be selected by architectures that don't use sysdev class or - sysdev driver power management (suspend/resume) and shutdown - operations. - endmenu diff --git a/drivers/base/base.h b/drivers/base/base.h index 19f49e41ce5..a34dca0ad04 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -111,8 +111,6 @@ static inline int driver_match_device(struct device_driver *drv, return drv->bus->match ? drv->bus->match(dev, drv) : 1; } -extern void sysdev_shutdown(void); - extern char *make_class_name(const char *name, struct kobject *kobj); extern int devres_release_all(struct device *dev); diff --git a/drivers/base/dd.c b/drivers/base/dd.c index e3a3eff1dac..6658da743c3 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -321,8 +321,7 @@ static void __device_release_driver(struct device *dev) drv = dev->driver; if (drv) { - pm_runtime_get_noresume(dev); - pm_runtime_barrier(dev); + pm_runtime_get_sync(dev); driver_sysfs_remove(dev); @@ -331,6 +330,8 @@ static void __device_release_driver(struct device *dev) BUS_NOTIFY_UNBIND_DRIVER, dev); + pm_runtime_put_sync(dev); + if (dev->bus && dev->bus->remove) dev->bus->remove(dev); else if (drv->remove) @@ -343,7 +344,6 @@ static void __device_release_driver(struct device *dev) BUS_NOTIFY_UNBOUND_DRIVER, dev); - pm_runtime_put_sync(dev); } } diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index 8c798ef7f13..bbb03e6f725 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -521,6 +521,11 @@ static int _request_firmware(const struct firmware **firmware_p, if (!firmware_p) return -EINVAL; + if (WARN_ON(usermodehelper_is_disabled())) { + dev_err(device, "firmware: %s will not be loaded\n", name); + return -EBUSY; + } + *firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL); if (!firmware) { dev_err(device, "%s: kmalloc(struct firmware) failed\n", diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 7d4bdaf557c..1c291af637b 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -667,7 +667,7 @@ static int platform_legacy_resume(struct device *dev) return ret; } -static int platform_pm_prepare(struct device *dev) +int platform_pm_prepare(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -678,7 +678,7 @@ static int platform_pm_prepare(struct device *dev) return ret; } -static void platform_pm_complete(struct device *dev) +void platform_pm_complete(struct device *dev) { struct device_driver *drv = dev->driver; @@ -686,16 +686,11 @@ static void platform_pm_complete(struct device *dev) drv->pm->complete(dev); } -#else /* !CONFIG_PM_SLEEP */ - -#define platform_pm_prepare NULL -#define platform_pm_complete NULL - -#endif /* !CONFIG_PM_SLEEP */ +#endif /* CONFIG_PM_SLEEP */ #ifdef CONFIG_SUSPEND -int __weak platform_pm_suspend(struct device *dev) +int platform_pm_suspend(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -713,7 +708,7 @@ int __weak platform_pm_suspend(struct device *dev) return ret; } -int __weak platform_pm_suspend_noirq(struct device *dev) +int platform_pm_suspend_noirq(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -729,7 +724,7 @@ int __weak platform_pm_suspend_noirq(struct device *dev) return ret; } -int __weak platform_pm_resume(struct device *dev) +int platform_pm_resume(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -747,7 +742,7 @@ int __weak platform_pm_resume(struct device *dev) return ret; } -int __weak platform_pm_resume_noirq(struct device *dev) +int platform_pm_resume_noirq(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -763,18 +758,11 @@ int __weak platform_pm_resume_noirq(struct device *dev) return ret; } -#else /* !CONFIG_SUSPEND */ - -#define platform_pm_suspend NULL -#define platform_pm_resume NULL -#define platform_pm_suspend_noirq NULL -#define platform_pm_resume_noirq NULL - -#endif /* !CONFIG_SUSPEND */ +#endif /* CONFIG_SUSPEND */ #ifdef CONFIG_HIBERNATE_CALLBACKS -static int platform_pm_freeze(struct device *dev) +int platform_pm_freeze(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -792,7 +780,7 @@ static int platform_pm_freeze(struct device *dev) return ret; } -static int platform_pm_freeze_noirq(struct device *dev) +int platform_pm_freeze_noirq(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -808,7 +796,7 @@ static int platform_pm_freeze_noirq(struct device *dev) return ret; } -static int platform_pm_thaw(struct device *dev) +int platform_pm_thaw(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -826,7 +814,7 @@ static int platform_pm_thaw(struct device *dev) return ret; } -static int platform_pm_thaw_noirq(struct device *dev) +int platform_pm_thaw_noirq(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -842,7 +830,7 @@ static int platform_pm_thaw_noirq(struct device *dev) return ret; } -static int platform_pm_poweroff(struct device *dev) +int platform_pm_poweroff(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -860,7 +848,7 @@ static int platform_pm_poweroff(struct device *dev) return ret; } -static int platform_pm_poweroff_noirq(struct device *dev) +int platform_pm_poweroff_noirq(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -876,7 +864,7 @@ static int platform_pm_poweroff_noirq(struct device *dev) return ret; } -static int platform_pm_restore(struct device *dev) +int platform_pm_restore(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -894,7 +882,7 @@ static int platform_pm_restore(struct device *dev) return ret; } -static int platform_pm_restore_noirq(struct device *dev) +int platform_pm_restore_noirq(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; @@ -910,62 +898,13 @@ static int platform_pm_restore_noirq(struct device *dev) return ret; } -#else /* !CONFIG_HIBERNATE_CALLBACKS */ - -#define platform_pm_freeze NULL -#define platform_pm_thaw NULL -#define platform_pm_poweroff NULL -#define platform_pm_restore NULL -#define platform_pm_freeze_noirq NULL -#define platform_pm_thaw_noirq NULL -#define platform_pm_poweroff_noirq NULL -#define platform_pm_restore_noirq NULL - -#endif /* !CONFIG_HIBERNATE_CALLBACKS */ - -#ifdef CONFIG_PM_RUNTIME - -int __weak platform_pm_runtime_suspend(struct device *dev) -{ - return pm_generic_runtime_suspend(dev); -}; - -int __weak platform_pm_runtime_resume(struct device *dev) -{ - return pm_generic_runtime_resume(dev); -}; - -int __weak platform_pm_runtime_idle(struct device *dev) -{ - return pm_generic_runtime_idle(dev); -}; - -#else /* !CONFIG_PM_RUNTIME */ - -#define platform_pm_runtime_suspend NULL -#define platform_pm_runtime_resume NULL -#define platform_pm_runtime_idle NULL - -#endif /* !CONFIG_PM_RUNTIME */ +#endif /* CONFIG_HIBERNATE_CALLBACKS */ static const struct dev_pm_ops platform_dev_pm_ops = { - .prepare = platform_pm_prepare, - .complete = platform_pm_complete, - .suspend = platform_pm_suspend, - .resume = platform_pm_resume, - .freeze = platform_pm_freeze, - .thaw = platform_pm_thaw, - .poweroff = platform_pm_poweroff, - .restore = platform_pm_restore, - .suspend_noirq = platform_pm_suspend_noirq, - .resume_noirq = platform_pm_resume_noirq, - .freeze_noirq = platform_pm_freeze_noirq, - .thaw_noirq = platform_pm_thaw_noirq, - .poweroff_noirq = platform_pm_poweroff_noirq, - .restore_noirq = platform_pm_restore_noirq, - .runtime_suspend = platform_pm_runtime_suspend, - .runtime_resume = platform_pm_runtime_resume, - .runtime_idle = platform_pm_runtime_idle, + .runtime_suspend = pm_generic_runtime_suspend, + .runtime_resume = pm_generic_runtime_resume, + .runtime_idle = pm_generic_runtime_idle, + USE_PLATFORM_PM_SLEEP_OPS }; struct bus_type platform_bus_type = { @@ -977,41 +916,6 @@ struct bus_type platform_bus_type = { }; EXPORT_SYMBOL_GPL(platform_bus_type); -/** - * platform_bus_get_pm_ops() - return pointer to busses dev_pm_ops - * - * This function can be used by platform code to get the current - * set of dev_pm_ops functions used by the platform_bus_type. - */ -const struct dev_pm_ops * __init platform_bus_get_pm_ops(void) -{ - return platform_bus_type.pm; -} - -/** - * platform_bus_set_pm_ops() - update dev_pm_ops for the platform_bus_type - * - * @pm: pointer to new dev_pm_ops struct to be used for platform_bus_type - * - * Platform code can override the dev_pm_ops methods of - * platform_bus_type by using this function. It is expected that - * platform code will first do a platform_bus_get_pm_ops(), then - * kmemdup it, then customize selected methods and pass a pointer to - * the new struct dev_pm_ops to this function. - * - * Since platform-specific code is customizing methods for *all* - * devices (not just platform-specific devices) it is expected that - * any custom overrides of these functions will keep existing behavior - * and simply extend it. For example, any customization of the - * runtime PM methods should continue to call the pm_generic_* - * functions as the default ones do in addition to the - * platform-specific behavior. - */ -void __init platform_bus_set_pm_ops(const struct dev_pm_ops *pm) -{ - platform_bus_type.pm = pm; -} - int __init platform_bus_init(void) { int error; diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile index 118c1b92a51..3647e114d0e 100644 --- a/drivers/base/power/Makefile +++ b/drivers/base/power/Makefile @@ -3,6 +3,6 @@ obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o obj-$(CONFIG_PM_RUNTIME) += runtime.o obj-$(CONFIG_PM_TRACE_RTC) += trace.o obj-$(CONFIG_PM_OPP) += opp.o +obj-$(CONFIG_HAVE_CLK) += clock_ops.o -ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG -ccflags-$(CONFIG_PM_VERBOSE) += -DDEBUG +ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG
\ No newline at end of file diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c new file mode 100644 index 00000000000..c0dd09df7be --- /dev/null +++ b/drivers/base/power/clock_ops.c @@ -0,0 +1,431 @@ +/* + * drivers/base/power/clock_ops.c - Generic clock manipulation PM callbacks + * + * Copyright (c) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp. + * + * This file is released under the GPLv2. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/clk.h> +#include <linux/slab.h> +#include <linux/err.h> + +#ifdef CONFIG_PM_RUNTIME + +struct pm_runtime_clk_data { + struct list_head clock_list; + struct mutex lock; +}; + +enum pce_status { + PCE_STATUS_NONE = 0, + PCE_STATUS_ACQUIRED, + PCE_STATUS_ENABLED, + PCE_STATUS_ERROR, +}; + +struct pm_clock_entry { + struct list_head node; + char *con_id; + struct clk *clk; + enum pce_status status; +}; + +static struct pm_runtime_clk_data *__to_prd(struct device *dev) +{ + return dev ? dev->power.subsys_data : NULL; +} + +/** + * pm_runtime_clk_add - Start using a device clock for runtime PM. + * @dev: Device whose clock is going to be used for runtime PM. + * @con_id: Connection ID of the clock. + * + * Add the clock represented by @con_id to the list of clocks used for + * the runtime PM of @dev. + */ +int pm_runtime_clk_add(struct device *dev, const char *con_id) +{ + struct pm_runtime_clk_data *prd = __to_prd(dev); + struct pm_clock_entry *ce; + + if (!prd) + return -EINVAL; + + ce = kzalloc(sizeof(*ce), GFP_KERNEL); + if (!ce) { + dev_err(dev, "Not enough memory for clock entry.\n"); + return -ENOMEM; + } + + if (con_id) { + ce->con_id = kstrdup(con_id, GFP_KERNEL); + if (!ce->con_id) { + dev_err(dev, + "Not enough memory for clock connection ID.\n"); + kfree(ce); + return -ENOMEM; + } + } + + mutex_lock(&prd->lock); + list_add_tail(&ce->node, &prd->clock_list); + mutex_unlock(&prd->lock); + return 0; +} + +/** + * __pm_runtime_clk_remove - Destroy runtime PM clock entry. + * @ce: Runtime PM clock entry to destroy. + * + * This routine must be called under the mutex protecting the runtime PM list + * of clocks corresponding the the @ce's device. + */ +static void __pm_runtime_clk_remove(struct pm_clock_entry *ce) +{ + if (!ce) + return; + + list_del(&ce->node); + + if (ce->status < PCE_STATUS_ERROR) { + if (ce->status == PCE_STATUS_ENABLED) + clk_disable(ce->clk); + + if (ce->status >= PCE_STATUS_ACQUIRED) + clk_put(ce->clk); + } + + if (ce->con_id) + kfree(ce->con_id); + + kfree(ce); +} + +/** + * pm_runtime_clk_remove - Stop using a device clock for runtime PM. + * @dev: Device whose clock should not be used for runtime PM any more. + * @con_id: Connection ID of the clock. + * + * Remove the clock represented by @con_id from the list of clocks used for + * the runtime PM of @dev. + */ +void pm_runtime_clk_remove(struct device *dev, const char *con_id) +{ + struct pm_runtime_clk_data *prd = __to_prd(dev); + struct pm_clock_entry *ce; + + if (!prd) + return; + + mutex_lock(&prd->lock); + + list_for_each_entry(ce, &prd->clock_list, node) { + if (!con_id && !ce->con_id) { + __pm_runtime_clk_remove(ce); + break; + } else if (!con_id || !ce->con_id) { + continue; + } else if (!strcmp(con_id, ce->con_id)) { + __pm_runtime_clk_remove(ce); + break; + } + } + + mutex_unlock(&prd->lock); +} + +/** + * pm_runtime_clk_init - Initialize a device's list of runtime PM clocks. + * @dev: Device to initialize the list of runtime PM clocks for. + * + * Allocate a struct pm_runtime_clk_data object, initialize its lock member and + * make the @dev's power.subsys_data field point to it. + */ +int pm_runtime_clk_init(struct device *dev) +{ + struct pm_runtime_clk_data *prd; + + prd = kzalloc(sizeof(*prd), GFP_KERNEL); + if (!prd) { + dev_err(dev, "Not enough memory fo runtime PM data.\n"); + return -ENOMEM; + } + + INIT_LIST_HEAD(&prd->clock_list); + mutex_init(&prd->lock); + dev->power.subsys_data = prd; + return 0; +} + +/** + * pm_runtime_clk_destroy - Destroy a device's list of runtime PM clocks. + * @dev: Device to destroy the list of runtime PM clocks for. + * + * Clear the @dev's power.subsys_data field, remove the list of clock entries + * from the struct pm_runtime_clk_data object pointed to by it before and free + * that object. + */ +void pm_runtime_clk_destroy(struct device *dev) +{ + struct pm_runtime_clk_data *prd = __to_prd(dev); + struct pm_clock_entry *ce, *c; + + if (!prd) + return; + + dev->power.subsys_data = NULL; + + mutex_lock(&prd->lock); + + list_for_each_entry_safe_reverse(ce, c, &prd->clock_list, node) + __pm_runtime_clk_remove(ce); + + mutex_unlock(&prd->lock); + + kfree(prd); +} + +/** + * pm_runtime_clk_acquire - Acquire a device clock. + * @dev: Device whose clock is to be acquired. + * @con_id: Connection ID of the clock. + */ +static void pm_runtime_clk_acquire(struct device *dev, + struct pm_clock_entry *ce) +{ + ce->clk = clk_get(dev, ce->con_id); + if (IS_ERR(ce->clk)) { + ce->status = PCE_STATUS_ERROR; + } else { + ce->status = PCE_STATUS_ACQUIRED; + dev_dbg(dev, "Clock %s managed by runtime PM.\n", ce->con_id); + } +} + +/** + * pm_runtime_clk_suspend - Disable clocks in a device's runtime PM clock list. + * @dev: Device to disable the clocks for. + */ +int pm_runtime_clk_suspend(struct device *dev) +{ + struct pm_runtime_clk_data *prd = __to_prd(dev); + struct pm_clock_entry *ce; + + dev_dbg(dev, "%s()\n", __func__); + + if (!prd) + return 0; + + mutex_lock(&prd->lock); + + list_for_each_entry_reverse(ce, &prd->clock_list, node) { + if (ce->status == PCE_STATUS_NONE) + pm_runtime_clk_acquire(dev, ce); + + if (ce->status < PCE_STATUS_ERROR) { + clk_disable(ce->clk); + ce->status = PCE_STATUS_ACQUIRED; + } + } + + mutex_unlock(&prd->lock); + + return 0; +} + +/** + * pm_runtime_clk_resume - Enable clocks in a device's runtime PM clock list. + * @dev: Device to enable the clocks for. + */ +int pm_runtime_clk_resume(struct device *dev) +{ + struct pm_runtime_clk_data *prd = __to_prd(dev); + struct pm_clock_entry *ce; + + dev_dbg(dev, "%s()\n", __func__); + + if (!prd) + return 0; + + mutex_lock(&prd->lock); + + list_for_each_entry(ce, &prd->clock_list, node) { + if (ce->status == PCE_STATUS_NONE) + pm_runtime_clk_acquire(dev, ce); + + if (ce->status < PCE_STATUS_ERROR) { + clk_enable(ce->clk); + ce->status = PCE_STATUS_ENABLED; + } + } + + mutex_unlock(&prd->lock); + + return 0; +} + +/** + * pm_runtime_clk_notify - Notify routine for device addition and removal. + * @nb: Notifier block object this function is a member of. + * @action: Operation being carried out by the caller. + * @data: Device the routine is being run for. + * + * For this function to work, @nb must be a member of an object of type + * struct pm_clk_notifier_block containing all of the requisite data. + * Specifically, the pwr_domain member of that object is copied to the device's + * pwr_domain field and its con_ids member is used to populate the device's list + * of runtime PM clocks, depending on @action. + * + * If the device's pwr_domain field is already populated with a value different + * from the one stored in the struct pm_clk_notifier_block object, the function + * does nothing. + */ +static int pm_runtime_clk_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct pm_clk_notifier_block *clknb; + struct device *dev = data; + char *con_id; + int error; + + dev_dbg(dev, "%s() %ld\n", __func__, action); + + clknb = container_of(nb, struct pm_clk_notifier_block, nb); + + switch (action) { + case BUS_NOTIFY_ADD_DEVICE: + if (dev->pwr_domain) + break; + + error = pm_runtime_clk_init(dev); + if (error) + break; + + dev->pwr_domain = clknb->pwr_domain; + if (clknb->con_ids[0]) { + for (con_id = clknb->con_ids[0]; *con_id; con_id++) + pm_runtime_clk_add(dev, con_id); + } else { + pm_runtime_clk_add(dev, NULL); + } + + break; + case BUS_NOTIFY_DEL_DEVICE: + if (dev->pwr_domain != clknb->pwr_domain) + break; + + dev->pwr_domain = NULL; + pm_runtime_clk_destroy(dev); + break; + } + + return 0; +} + +#else /* !CONFIG_PM_RUNTIME */ + +/** + * enable_clock - Enable a device clock. + * @dev: Device whose clock is to be enabled. + * @con_id: Connection ID of the clock. + */ +static void enable_clock(struct device *dev, const char *con_id) +{ + struct clk *clk; + + clk = clk_get(dev, con_id); + if (!IS_ERR(clk)) { + clk_enable(clk); + clk_put(clk); + dev_info(dev, "Runtime PM disabled, clock forced on.\n"); + } +} + +/** + * disable_clock - Disable a device clock. + * @dev: Device whose clock is to be disabled. + * @con_id: Connection ID of the clock. + */ +static void disable_clock(struct device *dev, const char *con_id) +{ + struct clk *clk; + + clk = clk_get(dev, con_id); + if (!IS_ERR(clk)) { + clk_disable(clk); + clk_put(clk); + dev_info(dev, "Runtime PM disabled, clock forced off.\n"); + } +} + +/** + * pm_runtime_clk_notify - Notify routine for device addition and removal. + * @nb: Notifier block object this function is a member of. + * @action: Operation being carried out by the caller. + * @data: Device the routine is being run for. + * + * For this function to work, @nb must be a member of an object of type + * struct pm_clk_notifier_block containing all of the requisite data. + * Specifically, the con_ids member of that object is used to enable or disable + * the device's clocks, depending on @action. + */ +static int pm_runtime_clk_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct pm_clk_notifier_block *clknb; + struct device *dev = data; + char *con_id; + + dev_dbg(dev, "%s() %ld\n", __func__, action); + + clknb = container_of(nb, struct pm_clk_notifier_block, nb); + + switch (action) { + case BUS_NOTIFY_ADD_DEVICE: + if (clknb->con_ids[0]) { + for (con_id = clknb->con_ids[0]; *con_id; con_id++) + enable_clock(dev, con_id); + } else { + enable_clock(dev, NULL); + } + break; + case BUS_NOTIFY_DEL_DEVICE: + if (clknb->con_ids[0]) { + for (con_id = clknb->con_ids[0]; *con_id; con_id++) + disable_clock(dev, con_id); + } else { + disable_clock(dev, NULL); + } + break; + } + + return 0; +} + +#endif /* !CONFIG_PM_RUNTIME */ + +/** + * pm_runtime_clk_add_notifier - Add bus type notifier for runtime PM clocks. + * @bus: Bus type to add the notifier to. + * @clknb: Notifier to be added to the given bus type. + * + * The nb member of @clknb is not expected to be initialized and its + * notifier_call member will be replaced with pm_runtime_clk_notify(). However, + * the remaining members of @clknb should be populated prior to calling this + * routine. + */ +void pm_runtime_clk_add_notifier(struct bus_type *bus, + struct pm_clk_notifier_block *clknb) +{ + if (!bus || !clknb) + return; + + clknb->nb.notifier_call = pm_runtime_clk_notify; + bus_register_notifier(bus, &clknb->nb); +} diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c index 42f97f92562..cb3bb368681 100644 --- a/drivers/base/power/generic_ops.c +++ b/drivers/base/power/generic_ops.c @@ -74,6 +74,23 @@ EXPORT_SYMBOL_GPL(pm_generic_runtime_resume); #ifdef CONFIG_PM_SLEEP /** + * pm_generic_prepare - Generic routine preparing a device for power transition. + * @dev: Device to prepare. + * + * Prepare a device for a system-wide power transition. + */ +int pm_generic_prepare(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (drv && drv->pm && drv->pm->prepare) + ret = drv->pm->prepare(dev); + + return ret; +} + +/** * __pm_generic_call - Generic suspend/freeze/poweroff/thaw subsystem callback. * @dev: Device to handle. * @event: PM transition of the system under way. @@ -213,16 +230,38 @@ int pm_generic_restore(struct device *dev) return __pm_generic_resume(dev, PM_EVENT_RESTORE); } EXPORT_SYMBOL_GPL(pm_generic_restore); + +/** + * pm_generic_complete - Generic routine competing a device power transition. + * @dev: Device to handle. + * + * Complete a device power transition during a system-wide power transition. + */ +void pm_generic_complete(struct device *dev) +{ + struct device_driver *drv = dev->driver; + + if (drv && drv->pm && drv->pm->complete) + drv->pm->complete(dev); + + /* + * Let runtime PM try to suspend devices that haven't been in use before + * going into the system-wide sleep state we're resuming from. + */ + pm_runtime_idle(dev); +} #endif /* CONFIG_PM_SLEEP */ struct dev_pm_ops generic_subsys_pm_ops = { #ifdef CONFIG_PM_SLEEP + .prepare = pm_generic_prepare, .suspend = pm_generic_suspend, .resume = pm_generic_resume, .freeze = pm_generic_freeze, .thaw = pm_generic_thaw, .poweroff = pm_generic_poweroff, .restore = pm_generic_restore, + .complete = pm_generic_complete, #endif #ifdef CONFIG_PM_RUNTIME .runtime_suspend = pm_generic_runtime_suspend, diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index fbc5b6e7c59..aa632020774 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -63,6 +63,7 @@ void device_pm_init(struct device *dev) dev->power.wakeup = NULL; spin_lock_init(&dev->power.lock); pm_runtime_init(dev); + INIT_LIST_HEAD(&dev->power.entry); } /** @@ -425,10 +426,8 @@ static int device_resume_noirq(struct device *dev, pm_message_t state) if (dev->pwr_domain) { pm_dev_dbg(dev, state, "EARLY power domain "); - pm_noirq_op(dev, &dev->pwr_domain->ops, state); - } - - if (dev->type && dev->type->pm) { + error = pm_noirq_op(dev, &dev->pwr_domain->ops, state); + } else if (dev->type && dev->type->pm) { pm_dev_dbg(dev, state, "EARLY type "); error = pm_noirq_op(dev, dev->type->pm, state); } else if (dev->class && dev->class->pm) { @@ -516,7 +515,8 @@ static int device_resume(struct device *dev, pm_message_t state, bool async) if (dev->pwr_domain) { pm_dev_dbg(dev, state, "power domain "); - pm_op(dev, &dev->pwr_domain->ops, state); + error = pm_op(dev, &dev->pwr_domain->ops, state); + goto End; } if (dev->type && dev->type->pm) { @@ -579,11 +579,13 @@ static bool is_async(struct device *dev) * Execute the appropriate "resume" callback for all devices whose status * indicates that they are suspended. */ -static void dpm_resume(pm_message_t state) +void dpm_resume(pm_message_t state) { struct device *dev; ktime_t starttime = ktime_get(); + might_sleep(); + mutex_lock(&dpm_list_mtx); pm_transition = state; async_error = 0; @@ -628,12 +630,11 @@ static void device_complete(struct device *dev, pm_message_t state) { device_lock(dev); - if (dev->pwr_domain && dev->pwr_domain->ops.complete) { + if (dev->pwr_domain) { pm_dev_dbg(dev, state, "completing power domain "); - dev->pwr_domain->ops.complete(dev); - } - - if (dev->type && dev->type->pm) { + if (dev->pwr_domain->ops.complete) + dev->pwr_domain->ops.complete(dev); + } else if (dev->type && dev->type->pm) { pm_dev_dbg(dev, state, "completing type "); if (dev->type->pm->complete) dev->type->pm->complete(dev); @@ -657,10 +658,12 @@ static void device_complete(struct device *dev, pm_message_t state) * Execute the ->complete() callbacks for all devices whose PM status is not * DPM_ON (this allows new devices to be registered). */ -static void dpm_complete(pm_message_t state) +void dpm_complete(pm_message_t state) { struct list_head list; + might_sleep(); + INIT_LIST_HEAD(&list); mutex_lock(&dpm_list_mtx); while (!list_empty(&dpm_prepared_list)) { @@ -689,7 +692,6 @@ static void dpm_complete(pm_message_t state) */ void dpm_resume_end(pm_message_t state) { - might_sleep(); dpm_resume(state); dpm_complete(state); } @@ -731,7 +733,12 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state) { int error; - if (dev->type && dev->type->pm) { + if (dev->pwr_domain) { + pm_dev_dbg(dev, state, "LATE power domain "); + error = pm_noirq_op(dev, &dev->pwr_domain->ops, state); + if (error) + return error; + } else if (dev->type && dev->type->pm) { pm_dev_dbg(dev, state, "LATE type "); error = pm_noirq_op(dev, dev->type->pm, state); if (error) @@ -748,11 +755,6 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state) return error; } - if (dev->pwr_domain) { - pm_dev_dbg(dev, state, "LATE power domain "); - pm_noirq_op(dev, &dev->pwr_domain->ops, state); - } - return 0; } @@ -840,21 +842,27 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async) goto End; } + if (dev->pwr_domain) { + pm_dev_dbg(dev, state, "power domain "); + error = pm_op(dev, &dev->pwr_domain->ops, state); + goto End; + } + if (dev->type && dev->type->pm) { pm_dev_dbg(dev, state, "type "); error = pm_op(dev, dev->type->pm, state); - goto Domain; + goto End; } if (dev->class) { if (dev->class->pm) { pm_dev_dbg(dev, state, "class "); error = pm_op(dev, dev->class->pm, state); - goto Domain; + goto End; } else if (dev->class->suspend) { pm_dev_dbg(dev, state, "legacy class "); error = legacy_suspend(dev, state, dev->class->suspend); - goto Domain; + goto End; } } @@ -868,12 +876,6 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async) } } - Domain: - if (!error && dev->pwr_domain) { - pm_dev_dbg(dev, state, "power domain "); - pm_op(dev, &dev->pwr_domain->ops, state); - } - End: device_unlock(dev); complete_all(&dev->power.completion); @@ -913,11 +915,13 @@ static int device_suspend(struct device *dev) * dpm_suspend - Execute "suspend" callbacks for all non-sysdev devices. * @state: PM transition of the system being carried out. */ -static int dpm_suspend(pm_message_t state) +int dpm_suspend(pm_message_t state) { ktime_t starttime = ktime_get(); int error = 0; + might_sleep(); + mutex_lock(&dpm_list_mtx); pm_transition = state; async_error = 0; @@ -964,7 +968,14 @@ static int device_prepare(struct device *dev, pm_message_t state) device_lock(dev); - if (dev->type && dev->type->pm) {< |