SYSTEM_SLEEP_PM_OPS和dev_pm_ops的定义：
- #define SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
- .suspend = suspend_fn, \
- .resume = resume_fn, \
- .freeze = suspend_fn, \
- .thaw = resume_fn, \
- .poweroff = suspend_fn, \
- .restore = resume_fn,
- struct dev_pm_ops {
- int (*prepare)(struct device *dev);
- void (*complete)(struct device *dev);
- int (*suspend)(struct device *dev);
- int (*resume)(struct device *dev);
- int (*freeze)(struct device *dev);
- int (*thaw)(struct device *dev);
- int (*poweroff)(struct device *dev);
- int (*restore)(struct device *dev);
- int (*suspend_noirq)(struct device *dev);
- int (*resume_noirq)(struct device *dev);
- int (*freeze_noirq)(struct device *dev);
- int (*thaw_noirq)(struct device *dev);
- int (*poweroff_noirq)(struct device *dev);
- int (*restore_noirq)(struct device *dev);
- int (*runtime_suspend)(struct device *dev);
- int (*runtime_resume)(struct device *dev);
- int (*runtime_idle)(struct device *dev);
- };
struct platform_driver中的driver成员也有一个dev_pm_ops
- struct platform_driver {
- int (*probe)(struct platform_device *);
- int (*remove)(struct platform_device *);
- void (*shutdown)(struct platform_device *);
- int (*suspend)(struct platform_device *, pm_message_t state);
- int (*resume)(struct platform_device *);
- struct device_driver driver;
- const struct platform_device_id *id_table;
- };
- struct device_driver {
- const char *name;
- struct bus_type *bus;
- struct module *owner;
- const char *mod_name; /* used for built-in modules */
- bool suppress_bind_attrs; /* disables bind/unbind via sysfs */
- const struct of_device_id *of_match_table;
- int (*probe) (struct device *dev);
- int (*remove) (struct device *dev);
- void (*shutdown) (struct device *dev);
- int (*suspend) (struct device *dev, pm_message_t state);
- int (*resume) (struct device *dev);
- const struct attribute_group **groups;
- const struct dev_pm_ops *pm;
- struct driver_private *p;
- };
那么可以将宏SIMPLE_DEV_PM_OPS使用到struct platform_driver定义中，例如gpio-keys.c中：
- static SIMPLE_DEV_PM_OPS(gpio_keys_pm_ops, gpio_keys_suspend, gpio_keys_resume);
- static struct platform_driver gpio_keys_device_driver = {
- .probe = gpio_keys_probe,
- .remove = __devexit_p(gpio_keys_remove),
- .driver = {
- .name = "gpio-keys",
- .owner = THIS_MODULE,
- .pm = &gpio_keys_pm_ops,
- .of_match_table = gpio_keys_of_match,
- }
- };