leds: Add suspend/resume state flags to leds-gpio
Add an option to preserve LED state when suspending/resuming to the LED
gpio driver. Based on a suggestion from Robert Jarzmik.
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 0daa2d2..8fa352a 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -93,7 +93,8 @@
}
led_dat->cdev.brightness_set = gpio_led_set;
led_dat->cdev.brightness = LED_OFF;
- led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ if (!template->retain_state_suspended)
+ led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
ret = gpio_direction_output(led_dat->gpio, led_dat->active_low);
if (ret < 0)
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 17d277e..376fe07 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -141,7 +141,8 @@
const char *name;
const char *default_trigger;
unsigned gpio;
- u8 active_low;
+ u8 active_low : 1;
+ u8 retain_state_suspended : 1;
};
struct gpio_led_platform_data {