From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757764AbcCaRsM (ORCPT ); Thu, 31 Mar 2016 13:48:12 -0400 Received: from mail-pa0-f47.google.com ([209.85.220.47]:35327 "EHLO mail-pa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756675AbcCaRsG (ORCPT ); Thu, 31 Mar 2016 13:48:06 -0400 Date: Thu, 31 Mar 2016 10:48:01 -0700 From: Dmitry Torokhov To: Boris Brezillon Cc: Thierry Reding , linux-pwm@vger.kernel.org, Mike Turquette , Stephen Boyd , linux-clk@vger.kernel.org, Mark Brown , Liam Girdwood , Kamil Debski , lm-sensors@lm-sensors.org, Jean Delvare , Guenter Roeck , linux-input@vger.kernel.org, Bryan Wu , Richard Purdie , Jacek Anaszewski , linux-leds@vger.kernel.org, Maxime Ripard , Chen-Yu Tsai , linux-sunxi@googlegroups.com, Joachim Eastwood , Thomas Petazzoni , Heiko Stuebner , linux-rockchip@lists.infradead.org, Jingoo Han , Lee Jones , linux-fbdev@vger.kernel.org, Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Robert Jarzmik , Alexandre Belloni , Kukjin Kim , Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, intel-gfx@lists.freedesktop.org, Daniel Vetter , Jani Nikula , Jonathan Corbet , linux-doc@vger.kernel.org, David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Hartley Sweeten , Ryan Mallon , Alexander Shiyan , Milo Kim Subject: Re: [PATCH v5 36/46] input: misc: max77693: switch to the atomic API Message-ID: <20160331174801.GC39098@dtor-ws> References: <1459368249-13241-1-git-send-email-boris.brezillon@free-electrons.com> <1459368249-13241-37-git-send-email-boris.brezillon@free-electrons.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1459368249-13241-37-git-send-email-boris.brezillon@free-electrons.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Boris, On Wed, Mar 30, 2016 at 10:03:59PM +0200, Boris Brezillon wrote: > pwm_config/enable/disable() have been deprecated and should be replaced > by pwm_apply_state(). > > Signed-off-by: Boris Brezillon > --- > drivers/input/misc/max77693-haptic.c | 23 +++++++++++++++++------ > 1 file changed, 17 insertions(+), 6 deletions(-) > > diff --git a/drivers/input/misc/max77693-haptic.c b/drivers/input/misc/max77693-haptic.c > index cf6aac0..aef7dc4 100644 > --- a/drivers/input/misc/max77693-haptic.c > +++ b/drivers/input/misc/max77693-haptic.c > @@ -70,13 +70,16 @@ struct max77693_haptic { > > static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic) > { > + struct pwm_state pstate; > struct pwm_args pargs = { }; > - int delta; > int error; > > pwm_get_args(haptic->pwm_dev, &pargs); > - delta = (pargs.period + haptic->pwm_duty) / 2; > - error = pwm_config(haptic->pwm_dev, delta, pargs.period); > + pwm_get_state(haptic->pwm_dev, &pstate); > + > + pstate.period = pargs.period; > + pstate.duty_cycle = (pargs.period + haptic->pwm_duty) / 2; > + error = pwm_apply_state(haptic->pwm_dev, &pstate); This does not make sense with regard to the atomic API. If you look in max77693_haptic_play_work(), right after calling max77693_haptic_set_duty_cycle() we either try to enable or disable the pwm. When switching to this new API we should combine both actions. > if (error) { > dev_err(haptic->dev, "failed to configure pwm: %d\n", error); > return error; > @@ -161,12 +164,16 @@ static int max77693_haptic_lowsys(struct max77693_haptic *haptic, bool enable) > > static void max77693_haptic_enable(struct max77693_haptic *haptic) > { > + struct pwm_state pstate; > int error; > > if (haptic->enabled) > return; > > - error = pwm_enable(haptic->pwm_dev); > + pwm_get_state(haptic->pwm_dev, &pstate); > + pstate.enabled = true; > + > + error = pwm_apply_state(haptic->pwm_dev, &pstate); As I mentioned I'd rather we did not deprecate pwm_enable() and pwm_disable() (and maybe others), as it forces us to add unnecessary boilerplate code to the drivers. > if (error) { > dev_err(haptic->dev, > "failed to enable haptic pwm device: %d\n", error); > @@ -188,11 +195,13 @@ static void max77693_haptic_enable(struct max77693_haptic *haptic) > err_enable_config: > max77693_haptic_lowsys(haptic, false); > err_enable_lowsys: > - pwm_disable(haptic->pwm_dev); > + pstate.enabled = false; > + pwm_apply_state(haptic->pwm_dev, &pstate); > } > > static void max77693_haptic_disable(struct max77693_haptic *haptic) > { > + struct pwm_state pstate; > int error; > > if (!haptic->enabled) > @@ -206,7 +215,9 @@ static void max77693_haptic_disable(struct max77693_haptic *haptic) > if (error) > goto err_disable_lowsys; > > - pwm_disable(haptic->pwm_dev); > + pwm_get_state(haptic->pwm_dev, &pstate); > + pstate.enabled = false; > + pwm_apply_state(haptic->pwm_dev, &pstate); Same here. > haptic->enabled = false; > > return; > -- > 2.5.0 > Thanks. -- Dmitry