Messages in this thread Patch in this message | | | Date | Thu, 21 May 2015 18:16:53 +0300 | From | Stas Sergeev <> | Subject | [PATCH 09/20] leds: mark gpio driver with LED_BRIGHTNESS_FAST flag |
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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 <cooloney@gmail.com> CC: Richard Purdie <rpurdie@rpsys.net> CC: Jacek Anaszewski <j.anaszewski@samsung.com> CC: linux-leds@vger.kernel.org CC: linux-kernel@vger.kernel.org CC: Raphael Assenat <raph@8d.com>
Signed-off-by: Stas Sergeev <stsp@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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