From patchwork Mon Jul 20 15:32:02 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 497773 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 2A6E91402B1 for ; Tue, 21 Jul 2015 01:34:56 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932679AbbGTPdw (ORCPT ); Mon, 20 Jul 2015 11:33:52 -0400 Received: from down.free-electrons.com ([37.187.137.238]:56249 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932197AbbGTPcP (ORCPT ); Mon, 20 Jul 2015 11:32:15 -0400 Received: by mail.free-electrons.com (Postfix, from userid 106) id 816A73D4; Mon, 20 Jul 2015 17:32:19 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost.localdomain (AToulouse-657-1-56-159.w82-125.abo.wanadoo.fr [82.125.234.159]) by mail.free-electrons.com (Postfix) with ESMTPSA id A18323D4; Mon, 20 Jul 2015 17:32:18 +0200 (CEST) From: Boris Brezillon To: Thierry Reding , linux-pwm@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Bryan Wu , Richard Purdie , Jacek Anaszewski , linux-leds@vger.kernel.org, Heiko Stuebner , linux-rockchip@lists.infradead.org, Jingoo Han , Lee Jones , linux-fbdev@vger.kernel.org, Mark Brown , Liam Girdwood , Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Doug Anderson , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Maxime Ripard , Boris Brezillon Subject: [PATCH v2 05/10] pwm: declare a default PWM state Date: Mon, 20 Jul 2015 17:32:02 +0200 Message-Id: <1437406327-6207-6-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1437406327-6207-1-git-send-email-boris.brezillon@free-electrons.com> References: <1437406327-6207-1-git-send-email-boris.brezillon@free-electrons.com> Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org Prepare the addition of the PWM initial state retrieval by adding a default state where all the parameters retrieved from DT, platform data or statically forced by the hardware will be stored. Once done we will be able to store the initial state in the ->state field without risking to loose the default parameters. Update the pwm_set/get_default_xxx helpers accordingly. Signed-off-by: Boris Brezillon --- include/linux/pwm.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/include/linux/pwm.h b/include/linux/pwm.h index f4bc034..1e6e9d1 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -101,6 +101,7 @@ struct pwm_device { void *chip_data; struct pwm_state state; + struct pwm_state default_state; }; static inline bool pwm_is_enabled(const struct pwm_device *pwm) @@ -117,7 +118,8 @@ static inline void pwm_set_period(struct pwm_device *pwm, unsigned int period) static inline void pwm_set_default_period(struct pwm_device *pwm, unsigned int period) { - pwm_set_period(pwm, period); + if (pwm) + pwm->default_state.period = period; } static inline unsigned int pwm_get_period(const struct pwm_device *pwm) @@ -127,7 +129,7 @@ static inline unsigned int pwm_get_period(const struct pwm_device *pwm) static inline unsigned int pwm_get_default_period(const struct pwm_device *pwm) { - return pwm_get_period(pwm); + return pwm ? pwm->default_state.period : 0; } static inline void pwm_set_duty_cycle(struct pwm_device *pwm, unsigned int duty) @@ -149,7 +151,8 @@ int pwm_set_polarity(struct pwm_device *pwm, enum pwm_polarity polarity); static inline void pwm_set_default_polarity(struct pwm_device *pwm, enum pwm_polarity polarity) { - pwm_set_polarity(pwm, polarity); + if (pwm) + pwm->default_state.polarity = polarity; } static inline enum pwm_polarity pwm_get_polarity(const struct pwm_device *pwm)