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power: reset: reboot-mode: Add managed resource API

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Provide managed resource version of reboot_mode_register() and
reboot_mode_unregister() to simplify implementations.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Bjorn Andersson 2016-08-03 22:04:05 -07:00 committed by Sebastian Reichel
parent 957cb72051
commit c1a9634f1a
3 changed files with 67 additions and 0 deletions
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4
Documentation/driver-model/devres.txt
View File

@ -342,6 +342,10 @@ PINCTRL
devm_pinctrl_register() devm_pinctrl_register()
devm_pinctrl_unregister() devm_pinctrl_unregister()
POWER
devm_reboot_mode_register()
devm_reboot_mode_unregister()
PWM PWM
devm_pwm_get() devm_pwm_get()
devm_pwm_put() devm_pwm_put()

59
drivers/power/reset/reboot-mode.c
View File

@ -135,6 +135,65 @@ int reboot_mode_unregister(struct reboot_mode_driver *reboot)
} }
EXPORT_SYMBOL_GPL(reboot_mode_unregister); EXPORT_SYMBOL_GPL(reboot_mode_unregister);
static void devm_reboot_mode_release(struct device *dev, void *res)
{
reboot_mode_unregister(*(struct reboot_mode_driver **)res);
}
/**
* devm_reboot_mode_register() - resource managed reboot_mode_register()
* @dev: device to associate this resource with
* @reboot: reboot mode driver
*
* Returns: 0 on success or a negative error code on failure.
*/
int devm_reboot_mode_register(struct device *dev,
struct reboot_mode_driver *reboot)
{
struct reboot_mode_driver **dr;
int rc;
dr = devres_alloc(devm_reboot_mode_release, sizeof(*dr), GFP_KERNEL);
if (!dr)
return -ENOMEM;
rc = reboot_mode_register(reboot);
if (rc) {
devres_free(dr);
return rc;
}
*dr = reboot;
devres_add(dev, dr);
return 0;
}
EXPORT_SYMBOL_GPL(devm_reboot_mode_register);
static int devm_reboot_mode_match(struct device *dev, void *res, void *data)
{
struct reboot_mode_driver **p = res;
if (WARN_ON(!p || !*p))
return 0;
return *p == data;
}
/**
* devm_reboot_mode_unregister() - resource managed reboot_mode_unregister()
* @dev: device to associate this resource with
* @reboot: reboot mode driver
*/
void devm_reboot_mode_unregister(struct device *dev,
struct reboot_mode_driver *reboot)
{
WARN_ON(devres_release(dev,
devm_reboot_mode_release,
devm_reboot_mode_match, reboot));
}
EXPORT_SYMBOL_GPL(devm_reboot_mode_unregister);
MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com"); MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com");
MODULE_DESCRIPTION("System reboot mode core library"); MODULE_DESCRIPTION("System reboot mode core library");
MODULE_LICENSE("GPL v2"); MODULE_LICENSE("GPL v2");

4
drivers/power/reset/reboot-mode.h
View File

@ -10,5 +10,9 @@ struct reboot_mode_driver {
int reboot_mode_register(struct reboot_mode_driver *reboot); int reboot_mode_register(struct reboot_mode_driver *reboot);
int reboot_mode_unregister(struct reboot_mode_driver *reboot); int reboot_mode_unregister(struct reboot_mode_driver *reboot);
int devm_reboot_mode_register(struct device *dev,
struct reboot_mode_driver *reboot);
void devm_reboot_mode_unregister(struct device *dev,
struct reboot_mode_driver *reboot);
#endif #endif