[RFC][PATCH 2/3] PM: New suspend and hibernation callbacks for platform bus type

Rafael J. Wysocki
2008-03-16T23:24:22Z

From: Rafael J. Wysocki <rjw@sisk.pl>

Implement new suspend and hibernation callbacks for the platform bus
type.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
drivers/base/platform.c | 444 ++++++++++++++++++++++++++++++++++++++--
include/linux/platform_device.h | 2
2 files changed, 425 insertions(+), 21 deletions(-)

Index: linux-2.6/include/linux/platform_device.h
===================================================================
--- linux-2.6.orig/include/linux/platform_device.h
+++ linux-2.6/include/linux/platform_device.h
@@ -53,6 +53,8 @@ struct platform_driver {
int (*suspend_late)(struct platform_device *, pm_message_t state);
int (*resume_early)(struct platform_device *);
int (*resume)(struct platform_device *);
+ struct pm_ops *pm;
+ struct pm_ops *pm_noirq;
struct device_driver driver;
};

Index: linux-2.6/drivers/base/platform.c
===================================================================
--- linux-2.6.orig/drivers/base/platform.c
+++ linux-2.6/drivers/base/platform.c
@@ -560,61 +560,463 @@ static int platform_match(struct device
return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0);
}

-static int platform_suspend(struct device *dev, pm_message_t mesg)
+#ifdef CONFIG_PM_SLEEP
+static int platform_pm_prepare(struct device *dev)
{
+ struct platform_driver *drv;
int ret = 0;

- if (dev->driver && dev->driver->suspend)
- ret = dev->driver->suspend(dev, mesg);
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm && drv->pm->prepare)
+ ret = drv->pm->prepare(dev);
+
+ return ret;
+}
+
+static int platform_pm_prepare_noirq(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq && drv->pm_noirq->prepare)
+ ret = drv->pm_noirq->prepare(dev);
+
+ return ret;
+}
+
+static void platform_pm_complete(struct device *dev)
+{
+ struct platform_driver *drv;
+
+ if (!dev->driver)
+ return;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm && drv->pm->complete)
+ drv->pm->complete(dev);
+}
+
+static void platform_pm_complete_noirq(struct device *dev)
+{
+ struct platform_driver *drv;
+
+ if (!dev->driver)
+ return;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq && drv->pm_noirq->complete)
+ drv->pm_noirq->complete(dev);
+}
+
+#ifdef CONFIG_SUSPEND
+static int platform_pm_suspend(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm) {
+ if (drv->pm->suspend)
+ ret = drv->pm->suspend(dev);
+ } else if (dev->driver->suspend) {
+ /* Legacy mechanism */
+ ret = dev->driver->suspend(dev, PMSG_SUSPEND);
+ }
+
+ return ret;
+}
+
+static int platform_pm_suspend_noirq(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->suspend)
+ ret = drv->pm_noirq->suspend(dev);
+ } else {
+ /* Legacy mechanism */
+ struct platform_device *pdev;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ if (drv->suspend_late)
+ ret = drv->suspend_late(pdev, PMSG_SUSPEND);
+ }
+
+ return ret;
+}
+
+static int platform_pm_resume(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm) {
+ if (drv->pm->resume)
+ ret = drv->pm->resume(dev);
+ } else if (dev->driver->resume) {
+ /* Legacy mechanism */
+ ret = dev->driver->resume(dev);
+ }

return ret;
}

-static int platform_suspend_late(struct device *dev, pm_message_t mesg)
+static int platform_pm_resume_noirq(struct device *dev)
{
- struct platform_driver *drv = to_platform_driver(dev->driver);
- struct platform_device *pdev;
+ struct platform_driver *drv;
int ret = 0;

- pdev = container_of(dev, struct platform_device, dev);
- if (dev->driver && drv->suspend_late)
- ret = drv->suspend_late(pdev, mesg);
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->resume)
+ ret = drv->pm_noirq->resume(dev);
+ } else {
+ /* Legacy mechanism */
+ struct platform_device *pdev;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ if (drv->resume_early)
+ ret = drv->resume_early(pdev);
+ }

return ret;
}
+#endif /* CONFIG_SUSPEND */

-static int platform_resume_early(struct device *dev)
+#ifdef CONFIG_HIBERNATION
+static int platform_pm_freeze(struct device *dev)
{
- struct platform_driver *drv = to_platform_driver(dev->driver);
- struct platform_device *pdev;
+ struct platform_driver *drv;
int ret = 0;

- pdev = container_of(dev, struct platform_device, dev);
- if (dev->driver && drv->resume_early)
- ret = drv->resume_early(pdev);
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm) {
+ if (drv->pm->freeze)
+ ret = drv->pm->freeze(dev);
+ } else if (dev->driver->suspend) {
+ /* Legacy mechanism */
+ ret = dev->driver->suspend(dev, PMSG_FREEZE);
+ }

return ret;
}

-static int platform_resume(struct device *dev)
+static int platform_pm_freeze_noirq(struct device *dev)
{
+ struct platform_driver *drv;
int ret = 0;

- if (dev->driver && dev->driver->resume)
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->freeze)
+ ret = drv->pm_noirq->freeze(dev);
+ } else {
+ /* Legacy mechanism */
+ struct platform_device *pdev;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ if (drv->suspend_late)
+ ret = drv->suspend_late(pdev, PMSG_FREEZE);
+ }
+
+ return ret;
+}
+
+static int platform_pm_thaw(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm) {
+ if (drv->pm->thaw)
+ ret = drv->pm->thaw(dev);
+ } else if (dev->driver->resume) {
+ /* Legacy mechanism */
ret = dev->driver->resume(dev);
+ }

return ret;
}

+static int platform_pm_thaw_noirq(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->thaw)
+ ret = drv->pm_noirq->thaw(dev);
+ } else {
+ /* Legacy mechanism */
+ struct platform_device *pdev;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ if (drv->resume_early)
+ ret = drv->resume_early(pdev);
+ }
+
+ return ret;
+}
+
+static int platform_pm_poweroff(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm) {
+ if (drv->pm->poweroff)
+ ret = drv->pm->poweroff(dev);
+ } else if (dev->driver->suspend) {
+ /* Legacy mechanism */
+ ret = dev->driver->suspend(dev, PMSG_HIBERNATE);
+ }
+
+ return ret;
+}
+
+static int platform_pm_poweroff_noirq(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->poweroff)
+ ret = drv->pm_noirq->poweroff(dev);
+ } else {
+ /* Legacy mechanism */
+ struct platform_device *pdev;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ if (drv->suspend_late)
+ ret = drv->suspend_late(pdev, PMSG_HIBERNATE);
+ }
+
+ return ret;
+}
+
+static int platform_pm_quiesce(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm) {
+ if (drv->pm->quiesce)
+ ret = drv->pm->quiesce(dev);
+ } else if (dev->driver->suspend) {
+ /* Legacy mechanism */
+ ret = dev->driver->suspend(dev, PMSG_QUIESCE);
+ }
+
+ return ret;
+}
+
+static int platform_pm_quiesce_noirq(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->quiesce)
+ ret = drv->pm_noirq->quiesce(dev);
+ } else {
+ /* Legacy mechanism */
+ struct platform_device *pdev;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ if (drv->suspend_late)
+ ret = drv->suspend_late(pdev, PMSG_QUIESCE);
+ }
+
+ return ret;
+}
+
+static int platform_pm_restore(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm) {
+ if (drv->pm->restore)
+ ret = drv->pm->restore(dev);
+ } else if (dev->driver->resume) {
+ /* Legacy mechanism */
+ ret = dev->driver->resume(dev);
+ }
+
+ return ret;
+}
+
+static int platform_pm_restore_noirq(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->restore)
+ ret = drv->pm_noirq->restore(dev);
+ } else {
+ /* Legacy mechanism */
+ struct platform_device *pdev;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ if (drv->resume_early)
+ ret = drv->resume_early(pdev);
+ }
+
+ return ret;
+}
+
+static int platform_pm_recover(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm) {
+ if (drv->pm->recover)
+ ret = drv->pm->recover(dev);
+ } else if (dev->driver->resume) {
+ /* Legacy mechanism */
+ ret = dev->driver->resume(dev);
+ }
+
+ return ret;
+}
+
+static int platform_pm_recover_noirq(struct device *dev)
+{
+ struct platform_driver *drv;
+ int ret = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ drv = to_platform_driver(dev->driver);
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->recover)
+ ret = drv->pm_noirq->recover(dev);
+ } else {
+ /* Legacy mechanism */
+ struct platform_device *pdev;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ if (drv->resume_early)
+ ret = drv->resume_early(pdev);
+ }
+
+ return ret;
+}
+#endif /* CONFIG_HIBERNATION */
+#endif /* CONFIG_PM_SLEEP */
+
+struct pm_ops platform_pm_ops = {
+#ifdef CONFIG_PM_SLEEP
+ .prepare = platform_pm_prepare,
+ .complete = platform_pm_complete,
+#endif
+#ifdef CONFIG_SUSPEND
+ .suspend = platform_pm_suspend,
+ .resume = platform_pm_resume,
+#endif
+#ifdef CONFIG_HIBERNATION
+ .freeze = platform_pm_freeze,
+ .thaw = platform_pm_thaw,
+ .poweroff = platform_pm_poweroff,
+ .quiesce = platform_pm_quiesce,
+ .restore = platform_pm_restore,
+ .recover = platform_pm_recover,
+#endif
+};
+
+struct pm_ops platform_pm_ops_noirq = {
+#ifdef CONFIG_PM_SLEEP
+ .prepare = platform_pm_prepare_noirq,
+ .complete = platform_pm_complete_noirq,
+#endif
+#ifdef CONFIG_SUSPEND
+ .suspend = platform_pm_suspend_noirq,
+ .resume = platform_pm_resume_noirq,
+#endif
+#ifdef CONFIG_HIBERNATION
+ .freeze = platform_pm_freeze_noirq,
+ .thaw = platform_pm_thaw_noirq,
+ .poweroff = platform_pm_poweroff_noirq,
+ .quiesce = platform_pm_quiesce_noirq,
+ .restore = platform_pm_restore_noirq,
+ .recover = platform_pm_recover_noirq,
+#endif
+};
+
struct bus_type platform_bus_type = {
.name = "platform",
.dev_attrs = platform_dev_attrs,
.match = platform_match,
.uevent = platform_uevent,
- .suspend = platform_suspend,
- .suspend_late = platform_suspend_late,
- .resume_early = platform_resume_early,
- .resume = platform_resume,
+ .pm = &platform_pm_ops,
+ .pm_noirq = &platform_pm_ops_noirq,
};
EXPORT_SYMBOL_GPL(platform_bus_type);