Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932797Ab2HWOVy (ORCPT ); Thu, 23 Aug 2012 10:21:54 -0400 Received: from zose-mta15.web4all.fr ([176.31.217.11]:40920 "EHLO zose-mta15.web4all.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756610Ab2HWOVu convert rfc822-to-8bit (ORCPT ); Thu, 23 Aug 2012 10:21:50 -0400 X-Greylist: delayed 447 seconds by postgrey-1.27 at vger.kernel.org; Thu, 23 Aug 2012 10:21:50 EDT Date: Thu, 23 Aug 2012 16:19:47 +0200 (CEST) From: =?utf-8?Q?Beno=C3=AEt_Th=C3=A9baudeau?= To: Thierry Reding , linux-kernel@vger.kernel.org, Sascha Hauer , linux-arm-kernel@lists.infradead.org, Dmitry Torokhov , linux-input@vger.kernel.org, Bryan Wu , Richard Purdie , linux-leds@vger.kernel.org, Florian Tobias Schandinat , linux-fbdev@vger.kernel.org Cc: =?utf-8?Q?Beno=C3=AEt_Th=C3=A9baudeau?= Message-ID: <217877237.2758643.1345731587941.JavaMail.root@advansee.com> In-Reply-To: <320569847.2756382.1345729013971.JavaMail.root@advansee.com> Subject: [PATCH] pwm: Call pwm_enable() before pwm_config() MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Originating-IP: [88.188.188.98] X-Mailer: Zimbra 7.2.0_GA_2669 (ZimbraWebClient - FF3.0 (Win)/7.2.0_GA_2669) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3618 Lines: 89 Some PWM drivers enable the clock of the PWM peripheral in pwm_enable(). Hence, for these drivers, a call to pwm_config() does not have any effect before pwm_enable() has been called. This patch fixes the PWM users to make sure that they call pwm_enable() before pwm_config(). This fixes the first setting of brightness through sysfs that had no effect with leds-pwm and the i.MX PWM driver. Cc: Thierry Reding Cc: Cc: Sascha Hauer Cc: Cc: Dmitry Torokhov Cc: Cc: Bryan Wu Cc: Richard Purdie Cc: Cc: Florian Tobias Schandinat Cc: Cc: Benoît Thébaudeau Signed-off-by: Benoît Thébaudeau --- .../drivers/input/misc/pwm-beeper.c | 6 +++--- .../drivers/leds/leds-pwm.c | 2 +- .../drivers/video/backlight/pwm_bl.c | 2 +- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git linux-next-c94456b.orig/drivers/input/misc/pwm-beeper.c linux-next-c94456b/drivers/input/misc/pwm-beeper.c index fc84c8a..97d322b 100644 --- linux-next-c94456b.orig/drivers/input/misc/pwm-beeper.c +++ linux-next-c94456b/drivers/input/misc/pwm-beeper.c @@ -53,10 +53,10 @@ static int pwm_beeper_event(struct input_dev *input, pwm_disable(beeper->pwm); } else { period = HZ_TO_NANOSECONDS(value); - ret = pwm_config(beeper->pwm, period / 2, period); + ret = pwm_enable(beeper->pwm); if (ret) return ret; - ret = pwm_enable(beeper->pwm); + ret = pwm_config(beeper->pwm, period / 2, period); if (ret) return ret; beeper->period = period; @@ -156,8 +156,8 @@ static int pwm_beeper_resume(struct device *dev) struct pwm_beeper *beeper = dev_get_drvdata(dev); if (beeper->period) { - pwm_config(beeper->pwm, beeper->period / 2, beeper->period); pwm_enable(beeper->pwm); + pwm_config(beeper->pwm, beeper->period / 2, beeper->period); } return 0; diff --git linux-next-c94456b.orig/drivers/leds/leds-pwm.c linux-next-c94456b/drivers/leds/leds-pwm.c index f2e44c7..c2e0c22 100644 --- linux-next-c94456b.orig/drivers/leds/leds-pwm.c +++ linux-next-c94456b/drivers/leds/leds-pwm.c @@ -42,8 +42,8 @@ static void led_pwm_set(struct led_classdev *led_cdev, pwm_config(led_dat->pwm, 0, period); pwm_disable(led_dat->pwm); } else { - pwm_config(led_dat->pwm, brightness * period / max, period); pwm_enable(led_dat->pwm); + pwm_config(led_dat->pwm, brightness * period / max, period); } } diff --git linux-next-c94456b.orig/drivers/video/backlight/pwm_bl.c linux-next-c94456b/drivers/video/backlight/pwm_bl.c index 995f016..a4bb95c 100644 --- linux-next-c94456b.orig/drivers/video/backlight/pwm_bl.c +++ linux-next-c94456b/drivers/video/backlight/pwm_bl.c @@ -65,8 +65,8 @@ static int pwm_backlight_update_status(struct backlight_device *bl) duty_cycle = pb->lth_brightness + (duty_cycle * (pb->period - pb->lth_brightness) / max); - pwm_config(pb->pwm, duty_cycle, pb->period); pwm_enable(pb->pwm); + pwm_config(pb->pwm, duty_cycle, pb->period); } if (pb->notify_after) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/