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authorRafael J. Wysocki <rjw@sisk.pl>2008-10-06 22:46:05 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2009-01-06 10:44:29 -0800
commitadf094931ffb25ef4b381559918f1a34181a5273 (patch)
treebd343d4c15b21dff6a73359fd2d82ff77e30e0d4 /drivers/base
parent238c6d54830c624f34ac9cf123ac04aebfca5013 (diff)
PM: Simplify the new suspend/hibernation framework for devices
PM: Simplify the new suspend/hibernation framework for devices Following the discussion at the Kernel Summit, simplify the new device PM framework by merging 'struct pm_ops' and 'struct pm_ext_ops' and removing pointers to 'struct pm_ext_ops' from 'struct platform_driver' and 'struct pci_driver'. After this change, the suspend/hibernation callbacks will only reside in 'struct device_driver' as well as at the bus type/ device class/device type level. Accordingly, PCI and platform device drivers are now expected to put their suspend/hibernation callbacks into the 'struct device_driver' embedded in 'struct pci_driver' or 'struct platform_driver', respectively. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/platform.c115
-rw-r--r--drivers/base/power/main.c19
2 files changed, 70 insertions, 64 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index dfcbfe50486..6c743b6008d 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -503,8 +503,6 @@ int platform_driver_register(struct platform_driver *drv)
drv->driver.suspend = platform_drv_suspend;
if (drv->resume)
drv->driver.resume = platform_drv_resume;
- if (drv->pm)
- drv->driver.pm = &drv->pm->base;
return driver_register(&drv->driver);
}
EXPORT_SYMBOL_GPL(platform_driver_register);
@@ -686,7 +684,10 @@ static int platform_pm_suspend(struct device *dev)
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->suspend)
ret = drv->pm->suspend(dev);
} else {
@@ -698,16 +699,15 @@ static int platform_pm_suspend(struct device *dev)
static int platform_pm_suspend_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->suspend_noirq)
- ret = pdrv->pm->suspend_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->suspend_noirq)
+ ret = drv->pm->suspend_noirq(dev);
} else {
ret = platform_legacy_suspend_late(dev, PMSG_SUSPEND);
}
@@ -720,7 +720,10 @@ static int platform_pm_resume(struct device *dev)
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->resume)
ret = drv->pm->resume(dev);
} else {
@@ -732,16 +735,15 @@ static int platform_pm_resume(struct device *dev)
static int platform_pm_resume_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->resume_noirq)
- ret = pdrv->pm->resume_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->resume_noirq)
+ ret = drv->pm->resume_noirq(dev);
} else {
ret = platform_legacy_resume_early(dev);
}
@@ -780,16 +782,15 @@ static int platform_pm_freeze(struct device *dev)
static int platform_pm_freeze_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->freeze_noirq)
- ret = pdrv->pm->freeze_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->freeze_noirq)
+ ret = drv->pm->freeze_noirq(dev);
} else {
ret = platform_legacy_suspend_late(dev, PMSG_FREEZE);
}
@@ -802,7 +803,10 @@ static int platform_pm_thaw(struct device *dev)
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->thaw)
ret = drv->pm->thaw(dev);
} else {
@@ -814,16 +818,15 @@ static int platform_pm_thaw(struct device *dev)
static int platform_pm_thaw_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->thaw_noirq)
- ret = pdrv->pm->thaw_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->thaw_noirq)
+ ret = drv->pm->thaw_noirq(dev);
} else {
ret = platform_legacy_resume_early(dev);
}
@@ -836,7 +839,10 @@ static int platform_pm_poweroff(struct device *dev)
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->poweroff)
ret = drv->pm->poweroff(dev);
} else {
@@ -848,16 +854,15 @@ static int platform_pm_poweroff(struct device *dev)
static int platform_pm_poweroff_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->poweroff_noirq)
- ret = pdrv->pm->poweroff_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->poweroff_noirq)
+ ret = drv->pm->poweroff_noirq(dev);
} else {
ret = platform_legacy_suspend_late(dev, PMSG_HIBERNATE);
}
@@ -870,7 +875,10 @@ static int platform_pm_restore(struct device *dev)
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->restore)
ret = drv->pm->restore(dev);
} else {
@@ -882,16 +890,15 @@ static int platform_pm_restore(struct device *dev)
static int platform_pm_restore_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->restore_noirq)
- ret = pdrv->pm->restore_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->restore_noirq)
+ ret = drv->pm->restore_noirq(dev);
} else {
ret = platform_legacy_resume_early(dev);
}
@@ -912,17 +919,15 @@ static int platform_pm_restore_noirq(struct device *dev)
#endif /* !CONFIG_HIBERNATION */
-static struct pm_ext_ops platform_pm_ops = {
- .base = {
- .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,
- },
+static 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,
@@ -931,7 +936,7 @@ static struct pm_ext_ops platform_pm_ops = {
.restore_noirq = platform_pm_restore_noirq,
};
-#define PLATFORM_PM_OPS_PTR &platform_pm_ops
+#define PLATFORM_PM_OPS_PTR (&platform_dev_pm_ops)
#else /* !CONFIG_PM_SLEEP */
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 692c20ba514..a8e4dcbcaf7 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -112,7 +112,8 @@ void device_pm_remove(struct device *dev)
* @ops: PM operations to choose from.
* @state: PM transition of the system being carried out.
*/
-static int pm_op(struct device *dev, struct pm_ops *ops, pm_message_t state)
+static int pm_op(struct device *dev, struct dev_pm_ops *ops,
+ pm_message_t state)
{
int error = 0;
@@ -174,7 +175,7 @@ static int pm_op(struct device *dev, struct pm_ops *ops, pm_message_t state)
* The operation is executed with interrupts disabled by the only remaining
* functional CPU in the system.
*/
-static int pm_noirq_op(struct device *dev, struct pm_ext_ops *ops,
+static int pm_noirq_op(struct device *dev, struct dev_pm_ops *ops,
pm_message_t state)
{
int error = 0;
@@ -354,7 +355,7 @@ static int resume_device(struct device *dev, pm_message_t state)
if (dev->bus) {
if (dev->bus->pm) {
pm_dev_dbg(dev, state, "");
- error = pm_op(dev, &dev->bus->pm->base, state);
+ error = pm_op(dev, dev->bus->pm, state);
} else if (dev->bus->resume) {
pm_dev_dbg(dev, state, "legacy ");
error = dev->bus->resume(dev);
@@ -451,9 +452,9 @@ static void complete_device(struct device *dev, pm_message_t state)
dev->type->pm->complete(dev);
}
- if (dev->bus && dev->bus->pm && dev->bus->pm->base.complete) {
+ if (dev->bus && dev->bus->pm && dev->bus->pm->complete) {
pm_dev_dbg(dev, state, "completing ");
- dev->bus->pm->base.complete(dev);
+ dev->bus->pm->complete(dev);
}
up(&dev->sem);
@@ -624,7 +625,7 @@ static int suspend_device(struct device *dev, pm_message_t state)
if (dev->bus) {
if (dev->bus->pm) {
pm_dev_dbg(dev, state, "");
- error = pm_op(dev, &dev->bus->pm->base, state);
+ error = pm_op(dev, dev->bus->pm, state);
} else if (dev->bus->suspend) {
pm_dev_dbg(dev, state, "legacy ");
error = dev->bus->suspend(dev, state);
@@ -685,10 +686,10 @@ static int prepare_device(struct device *dev, pm_message_t state)
down(&dev->sem);
- if (dev->bus && dev->bus->pm && dev->bus->pm->base.prepare) {
+ if (dev->bus && dev->bus->pm && dev->bus->pm->prepare) {
pm_dev_dbg(dev, state, "preparing ");
- error = dev->bus->pm->base.prepare(dev);
- suspend_report_result(dev->bus->pm->base.prepare, error);
+ error = dev->bus->pm->prepare(dev);
+ suspend_report_result(dev->bus->pm->prepare, error);
if (error)
goto End;
}