From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stas Sergeev Subject: [PATCH 16/20] leds: mark pwm driver with LED_BRIGHTNESS_FAST flag Date: Thu, 21 May 2015 18:21:46 +0300 Message-ID: <555DF80A.5050603@list.ru> References: <555CA58A.10700@list.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from smtp42.i.mail.ru ([94.100.177.102]:49223 "EHLO smtp42.i.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751925AbbEUPVv (ORCPT ); Thu, 21 May 2015 11:21:51 -0400 In-Reply-To: <555CA58A.10700@list.ru> Sender: linux-leds-owner@vger.kernel.org List-Id: linux-leds@vger.kernel.org To: linux-leds@vger.kernel.org Cc: Linux kernel , Stas Sergeev , Bryan Wu , Richard Purdie , Jacek Anaszewski , Luotao Fu 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 CC: Richard Purdie CC: Jacek Anaszewski CC: linux-leds@vger.kernel.org CC: linux-kernel@vger.kernel.org CC: Luotao Fu Signed-off-by: Stas Sergeev --- drivers/leds/leds-pwm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c index 1d07e3e..82d01e5 100644 --- a/drivers/leds/leds-pwm.c +++ b/drivers/leds/leds-pwm.c @@ -124,6 +124,8 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv, led_data->can_sleep = pwm_can_sleep(led_data->pwm); if (led_data->can_sleep) INIT_WORK(&led_data->work, led_pwm_work); + else + led_data->cdev.flags |= LED_BRIGHTNESS_FAST; led_data->period = pwm_get_period(led_data->pwm); if (!led_data->period && (led->pwm_period_ns > 0)) -- 1.7.9.5