mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 08:31:55 +00:00
d35ef90bf9
Linux power management subsystem supports vast amount of new PM callbacks that are crucial for proper suspend and hibernation support in drivers. This patch implements support for dev_pm_ops, preserving support for legacy callbacks. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
406 lines
8.2 KiB
C
406 lines
8.2 KiB
C
/*
|
|
* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
|
|
* <benh@kernel.crashing.org>
|
|
* and Arnd Bergmann, IBM Corp.
|
|
* Merged from powerpc/kernel/of_platform.c and
|
|
* sparc{,64}/kernel/of_device.c by Stephen Rothwell
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
*/
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
extern struct device_attribute of_platform_device_attrs[];
|
|
|
|
static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *of_drv = to_of_platform_driver(drv);
|
|
const struct of_device_id *matches = of_drv->match_table;
|
|
|
|
if (!matches)
|
|
return 0;
|
|
|
|
return of_match_device(matches, of_dev) != NULL;
|
|
}
|
|
|
|
static int of_platform_device_probe(struct device *dev)
|
|
{
|
|
int error = -ENODEV;
|
|
struct of_platform_driver *drv;
|
|
struct of_device *of_dev;
|
|
const struct of_device_id *match;
|
|
|
|
drv = to_of_platform_driver(dev->driver);
|
|
of_dev = to_of_device(dev);
|
|
|
|
if (!drv->probe)
|
|
return error;
|
|
|
|
of_dev_get(of_dev);
|
|
|
|
match = of_match_device(drv->match_table, of_dev);
|
|
if (match)
|
|
error = drv->probe(of_dev, match);
|
|
if (error)
|
|
of_dev_put(of_dev);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int of_platform_device_remove(struct device *dev)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->remove)
|
|
drv->remove(of_dev);
|
|
return 0;
|
|
}
|
|
|
|
static void of_platform_device_shutdown(struct device *dev)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->shutdown)
|
|
drv->shutdown(of_dev);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
|
|
int ret = 0;
|
|
|
|
if (dev->driver && drv->suspend)
|
|
ret = drv->suspend(of_dev, mesg);
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_legacy_resume(struct device *dev)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
|
|
int ret = 0;
|
|
|
|
if (dev->driver && drv->resume)
|
|
ret = drv->resume(of_dev);
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_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;
|
|
}
|
|
|
|
static void of_platform_pm_complete(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
|
|
if (drv && drv->pm && drv->pm->complete)
|
|
drv->pm->complete(dev);
|
|
}
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
|
|
static int of_platform_pm_suspend(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->suspend)
|
|
ret = drv->pm->suspend(dev);
|
|
} else {
|
|
ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_suspend_noirq(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->suspend_noirq)
|
|
ret = drv->pm->suspend_noirq(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_resume(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->resume)
|
|
ret = drv->pm->resume(dev);
|
|
} else {
|
|
ret = of_platform_legacy_resume(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_resume_noirq(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->resume_noirq)
|
|
ret = drv->pm->resume_noirq(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#else /* !CONFIG_SUSPEND */
|
|
|
|
#define of_platform_pm_suspend NULL
|
|
#define of_platform_pm_resume NULL
|
|
#define of_platform_pm_suspend_noirq NULL
|
|
#define of_platform_pm_resume_noirq NULL
|
|
|
|
#endif /* !CONFIG_SUSPEND */
|
|
|
|
#ifdef CONFIG_HIBERNATION
|
|
|
|
static int of_platform_pm_freeze(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->freeze)
|
|
ret = drv->pm->freeze(dev);
|
|
} else {
|
|
ret = of_platform_legacy_suspend(dev, PMSG_FREEZE);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_freeze_noirq(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->freeze_noirq)
|
|
ret = drv->pm->freeze_noirq(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_thaw(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->thaw)
|
|
ret = drv->pm->thaw(dev);
|
|
} else {
|
|
ret = of_platform_legacy_resume(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_thaw_noirq(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->thaw_noirq)
|
|
ret = drv->pm->thaw_noirq(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_poweroff(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->poweroff)
|
|
ret = drv->pm->poweroff(dev);
|
|
} else {
|
|
ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_poweroff_noirq(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->poweroff_noirq)
|
|
ret = drv->pm->poweroff_noirq(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_restore(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->restore)
|
|
ret = drv->pm->restore(dev);
|
|
} else {
|
|
ret = of_platform_legacy_resume(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int of_platform_pm_restore_noirq(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return 0;
|
|
|
|
if (drv->pm) {
|
|
if (drv->pm->restore_noirq)
|
|
ret = drv->pm->restore_noirq(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#else /* !CONFIG_HIBERNATION */
|
|
|
|
#define of_platform_pm_freeze NULL
|
|
#define of_platform_pm_thaw NULL
|
|
#define of_platform_pm_poweroff NULL
|
|
#define of_platform_pm_restore NULL
|
|
#define of_platform_pm_freeze_noirq NULL
|
|
#define of_platform_pm_thaw_noirq NULL
|
|
#define of_platform_pm_poweroff_noirq NULL
|
|
#define of_platform_pm_restore_noirq NULL
|
|
|
|
#endif /* !CONFIG_HIBERNATION */
|
|
|
|
static struct dev_pm_ops of_platform_dev_pm_ops = {
|
|
.prepare = of_platform_pm_prepare,
|
|
.complete = of_platform_pm_complete,
|
|
.suspend = of_platform_pm_suspend,
|
|
.resume = of_platform_pm_resume,
|
|
.freeze = of_platform_pm_freeze,
|
|
.thaw = of_platform_pm_thaw,
|
|
.poweroff = of_platform_pm_poweroff,
|
|
.restore = of_platform_pm_restore,
|
|
.suspend_noirq = of_platform_pm_suspend_noirq,
|
|
.resume_noirq = of_platform_pm_resume_noirq,
|
|
.freeze_noirq = of_platform_pm_freeze_noirq,
|
|
.thaw_noirq = of_platform_pm_thaw_noirq,
|
|
.poweroff_noirq = of_platform_pm_poweroff_noirq,
|
|
.restore_noirq = of_platform_pm_restore_noirq,
|
|
};
|
|
|
|
#define OF_PLATFORM_PM_OPS_PTR (&of_platform_dev_pm_ops)
|
|
|
|
#else /* !CONFIG_PM_SLEEP */
|
|
|
|
#define OF_PLATFORM_PM_OPS_PTR NULL
|
|
|
|
#endif /* !CONFIG_PM_SLEEP */
|
|
|
|
int of_bus_type_init(struct bus_type *bus, const char *name)
|
|
{
|
|
bus->name = name;
|
|
bus->match = of_platform_bus_match;
|
|
bus->probe = of_platform_device_probe;
|
|
bus->remove = of_platform_device_remove;
|
|
bus->shutdown = of_platform_device_shutdown;
|
|
bus->dev_attrs = of_platform_device_attrs;
|
|
bus->pm = OF_PLATFORM_PM_OPS_PTR;
|
|
return bus_register(bus);
|
|
}
|
|
|
|
int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
|
|
{
|
|
/* initialize common driver fields */
|
|
if (!drv->driver.name)
|
|
drv->driver.name = drv->name;
|
|
if (!drv->driver.owner)
|
|
drv->driver.owner = drv->owner;
|
|
drv->driver.bus = bus;
|
|
|
|
/* register with core */
|
|
return driver_register(&drv->driver);
|
|
}
|
|
EXPORT_SYMBOL(of_register_driver);
|
|
|
|
void of_unregister_driver(struct of_platform_driver *drv)
|
|
{
|
|
driver_unregister(&drv->driver);
|
|
}
|
|
EXPORT_SYMBOL(of_unregister_driver);
|