leds: core: Drivers shouldn't enforce SYNC/ASYNC brightness setting
This patch removes SET_BRIGHTNESS_ASYNC and SET_BRIGHTNESS_SYNC flags. led_set_brightness() now calls led_set_brightness_nosleep() instead of choosing between sync and async op basing on the flags defined by the driver. From now on, if a user wants to make sure that brightness will be set synchronously, they have to use led_set_brightness_sync() API. It is now being made publicly available since it has become apparent that it is a caller who should decide whether brightness is to be set in a synchronous or an asynchronous way. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
This commit is contained in:
parent
1afcadfcd1
commit
13ae79bbe4
|
@ -316,10 +316,6 @@ int led_classdev_flash_register(struct device *parent,
|
|||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Setting a torch brightness needs to have immediate effect */
|
||||
led_cdev->flags &= ~SET_BRIGHTNESS_ASYNC;
|
||||
led_cdev->flags |= SET_BRIGHTNESS_SYNC;
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(led_classdev_flash_register);
|
||||
|
|
|
@ -215,8 +215,6 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
|
|||
if (!led_cdev->max_brightness)
|
||||
led_cdev->max_brightness = LED_FULL;
|
||||
|
||||
led_cdev->flags |= SET_BRIGHTNESS_ASYNC;
|
||||
|
||||
led_update_brightness(led_cdev);
|
||||
|
||||
led_init_core(led_cdev);
|
||||
|
|
|
@ -205,8 +205,6 @@ EXPORT_SYMBOL_GPL(led_stop_software_blink);
|
|||
void led_set_brightness(struct led_classdev *led_cdev,
|
||||
enum led_brightness brightness)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
/*
|
||||
* In case blinking is on delay brightness setting
|
||||
* until the next timer tick.
|
||||
|
@ -227,17 +225,7 @@ void led_set_brightness(struct led_classdev *led_cdev,
|
|||
return;
|
||||
}
|
||||
|
||||
if (led_cdev->flags & SET_BRIGHTNESS_ASYNC) {
|
||||
led_set_brightness_nosleep(led_cdev, brightness);
|
||||
return;
|
||||
} else if (led_cdev->flags & SET_BRIGHTNESS_SYNC)
|
||||
ret = led_set_brightness_sync(led_cdev, brightness);
|
||||
else
|
||||
ret = -EINVAL;
|
||||
|
||||
if (ret < 0)
|
||||
dev_dbg(led_cdev->dev, "Setting LED brightness failed (%d)\n",
|
||||
ret);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(led_set_brightness);
|
||||
|
||||
|
@ -268,6 +256,24 @@ void led_set_brightness_nosleep(struct led_classdev *led_cdev,
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(led_set_brightness_nosleep);
|
||||
|
||||
int led_set_brightness_sync(struct led_classdev *led_cdev,
|
||||
enum led_brightness value)
|
||||
{
|
||||
if (led_cdev->blink_delay_on || led_cdev->blink_delay_off)
|
||||
return -EBUSY;
|
||||
|
||||
led_cdev->brightness = min(value, led_cdev->max_brightness);
|
||||
|
||||
if (led_cdev->flags & LED_SUSPENDED)
|
||||
return 0;
|
||||
|
||||
if (led_cdev->brightness_set_blocking)
|
||||
return led_cdev->brightness_set_blocking(led_cdev,
|
||||
led_cdev->brightness);
|
||||
return -ENOTSUPP;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(led_set_brightness_sync);
|
||||
|
||||
int led_update_brightness(struct led_classdev *led_cdev)
|
||||
{
|
||||
int ret = 0;
|
||||
|
|
|
@ -16,19 +16,6 @@
|
|||
#include <linux/rwsem.h>
|
||||
#include <linux/leds.h>
|
||||
|
||||
static inline int led_set_brightness_sync(struct led_classdev *led_cdev,
|
||||
enum led_brightness value)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
led_cdev->brightness = min(value, led_cdev->max_brightness);
|
||||
|
||||
if (!(led_cdev->flags & LED_SUSPENDED))
|
||||
ret = led_cdev->brightness_set_blocking(led_cdev,
|
||||
led_cdev->brightness);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int led_get_brightness(struct led_classdev *led_cdev)
|
||||
{
|
||||
return led_cdev->brightness;
|
||||
|
|
|
@ -47,9 +47,7 @@ struct led_classdev {
|
|||
#define LED_BLINK_BRIGHTNESS_CHANGE (1 << 20)
|
||||
#define LED_BLINK_DISABLE (1 << 21)
|
||||
#define LED_SYSFS_DISABLE (1 << 22)
|
||||
#define SET_BRIGHTNESS_ASYNC (1 << 23)
|
||||
#define SET_BRIGHTNESS_SYNC (1 << 24)
|
||||
#define LED_DEV_CAP_FLASH (1 << 25)
|
||||
#define LED_DEV_CAP_FLASH (1 << 23)
|
||||
|
||||
/* Set LED brightness level */
|
||||
/* Must not sleep, use a workqueue if needed */
|
||||
|
@ -162,6 +160,21 @@ extern void led_blink_set_oneshot(struct led_classdev *led_cdev,
|
|||
*/
|
||||
extern void led_set_brightness(struct led_classdev *led_cdev,
|
||||
enum led_brightness brightness);
|
||||
|
||||
/**
|
||||
* led_set_brightness_sync - set LED brightness synchronously
|
||||
* @led_cdev: the LED to set
|
||||
* @brightness: the brightness to set it to
|
||||
*
|
||||
* Set an LED's brightness immediately. This function will block
|
||||
* the caller for the time required for accessing device registers,
|
||||
* and it can sleep.
|
||||
*
|
||||
* Returns: 0 on success or negative error value on failure
|
||||
*/
|
||||
extern int led_set_brightness_sync(struct led_classdev *led_cdev,
|
||||
enum led_brightness value);
|
||||
|
||||
/**
|
||||
* led_update_brightness - update LED brightness
|
||||
* @led_cdev: the LED to query
|
||||
|
|
Loading…
Reference in New Issue