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authorJacek Anaszewski <j.anaszewski@samsung.com>2015-01-09 18:22:51 +0300
committerBryan Wu <cooloney@gmail.com>2015-01-27 01:59:08 +0300
commit7aea8389a77abf9fde254aca2434a605c7704f58 (patch)
tree580f35fdeca75a9533329d85822ab32f89fce64a /include/linux/leds.h
parent452bc149947bb31775f0dc6a637fcf792af88e60 (diff)
downloadlinux-7aea8389a77abf9fde254aca2434a605c7704f58.tar.xz
leds: Add LED Flash class extension to the LED subsystem
Some LED devices support two operation modes - torch and flash. This patch provides support for flash LED devices in the LED subsystem by introducing new sysfs attributes and kernel internal interface. The attributes being introduced are: flash_brightness, flash_strobe, flash_timeout, max_flash_timeout, max_flash_brightness, flash_fault, flash_sync_strobe and available_sync_leds. All the flash related features are placed in a separate module. The modifications aim to be compatible with V4L2 framework requirements related to the flash devices management. The design assumes that V4L2 sub-device can take of the LED class device control and communicate with it through the kernel internal interface. When V4L2 Flash sub-device file is opened, the LED class device sysfs interface is made unavailable. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: Richard Purdie <rpurdie@rpsys.net> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'include/linux/leds.h')
-rw-r--r--include/linux/leds.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h
index cfceef32c9b3..f70f84f35674 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -46,6 +46,8 @@ struct led_classdev {
#define LED_SYSFS_DISABLE (1 << 20)
#define SET_BRIGHTNESS_ASYNC (1 << 21)
#define SET_BRIGHTNESS_SYNC (1 << 22)
+#define LED_DEV_CAP_FLASH (1 << 23)
+#define LED_DEV_CAP_SYNC_STROBE (1 << 24)
/* Set LED brightness level */
/* Must not sleep, use a workqueue if needed */
@@ -81,6 +83,7 @@ struct led_classdev {
unsigned long blink_delay_on, blink_delay_off;
struct timer_list blink_timer;
int blink_brightness;
+ void (*flash_resume)(struct led_classdev *led_cdev);
struct work_struct set_brightness_work;
int delayed_set_value;