Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755912AbcDDPen (ORCPT ); Mon, 4 Apr 2016 11:34:43 -0400 Received: from mail-lf0-f48.google.com ([209.85.215.48]:34931 "EHLO mail-lf0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755877AbcDDPej (ORCPT ); Mon, 4 Apr 2016 11:34:39 -0400 Date: Mon, 4 Apr 2016 17:34:33 +0200 From: Thierry Reding To: Boris Brezillon Cc: Dmitry Torokhov , 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: <20160404153433.GD17856@ulmo> References: <1459368249-13241-1-git-send-email-boris.brezillon@free-electrons.com> <1459368249-13241-37-git-send-email-boris.brezillon@free-electrons.com> <20160331174801.GC39098@dtor-ws> <20160331205718.057a6f38@bbrezillon> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="8w3uRX/HFJGApMzv" Content-Disposition: inline In-Reply-To: <20160331205718.057a6f38@bbrezillon> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3187 Lines: 82 --8w3uRX/HFJGApMzv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Mar 31, 2016 at 08:57:18PM +0200, Boris Brezillon wrote: > On Thu, 31 Mar 2016 10:48:01 -0700 > Dmitry Torokhov wrote: >=20 > > Hi Boris, > >=20 > > On Wed, Mar 30, 2016 at 10:03:59PM +0200, Boris Brezillon wrote: > > > pwm_config/enable/disable() have been deprecated and should be replac= ed > > > by pwm_apply_state(). > > >=20 > > > Signed-off-by: Boris Brezillon > > > --- > > > drivers/input/misc/max77693-haptic.c | 23 +++++++++++++++++------ > > > 1 file changed, 17 insertions(+), 6 deletions(-) > > >=20 > > > diff --git a/drivers/input/misc/max77693-haptic.c b/drivers/input/mis= c/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 { > > > =20 > > > static int max77693_haptic_set_duty_cycle(struct max77693_haptic *ha= ptic) > > > { > > > + struct pwm_state pstate; > > > struct pwm_args pargs =3D { }; > > > - int delta; > > > int error; > > > =20 > > > pwm_get_args(haptic->pwm_dev, &pargs); > > > - delta =3D (pargs.period + haptic->pwm_duty) / 2; > > > - error =3D pwm_config(haptic->pwm_dev, delta, pargs.period); > > > + pwm_get_state(haptic->pwm_dev, &pstate); > > > + > > > + pstate.period =3D pargs.period; > > > + pstate.duty_cycle =3D (pargs.period + haptic->pwm_duty) / 2; > > > + error =3D pwm_apply_state(haptic->pwm_dev, &pstate); > >=20 > > 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. >=20 > True. I'll address that, unless Thierry is fine keeping the non-atomic > API, in which case I'll just drop patches 32 to 46. I'm fine with keeping the pwm_enable(), pwm_disable() and pwm_config() APIs, but they should only be used as shortcuts. Where possible the new atomic API should be used to combine multiple operations into one. 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