This driver doesn't use sleeping operations in .brightness_set
method if can_sleep variable is not set. In that case it can be
marked with LED_BRIGHTNESS_FAST flag.
That flag allows changing brightness at high rates (over 100Hz).
CC: Bryan Wu <coolo...@gmail.com>
CC: Richard Purdie <rpur...@rpsys.net>
CC: Jacek Anaszewski <j.anaszew...@samsung.com>
CC: linux-l...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: Raphael Assenat <r...@8d.com>
Signed-off-by: Stas Sergeev <s...@users.sourceforge.net>
---
drivers/leds/leds-gpio.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 3af4f2b..0e1346c 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -138,6 +138,8 @@ static int create_gpio_led(const struct gpio_led *template,
led_dat->cdev.brightness = state ? LED_FULL : LED_OFF;
if (!template->retain_state_suspended)
led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ if (!led_dat->can_sleep)
+ led_dat->cdev.flags |= LED_BRIGHTNESS_FAST;
ret = gpiod_direction_output(led_dat->gpiod, state);
if (ret < 0)
--
1.7.9.5
--
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