From patchwork Wed Jul 1 08:21:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 489905 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 D43881402D1 for ; Wed, 1 Jul 2015 18:22:45 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753420AbbGAIWb (ORCPT ); Wed, 1 Jul 2015 04:22:31 -0400 Received: from down.free-electrons.com ([37.187.137.238]:34275 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751052AbbGAIWO (ORCPT ); Wed, 1 Jul 2015 04:22:14 -0400 Received: by mail.free-electrons.com (Postfix, from userid 106) id 9691E1F46; Wed, 1 Jul 2015 10:22:15 +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 (col31-4-88-188-83-94.fbx.proxad.net [88.188.83.94]) by mail.free-electrons.com (Postfix) with ESMTPSA id 883631F4F; Wed, 1 Jul 2015 10:22:14 +0200 (CEST) From: Boris Brezillon To: Thierry Reding , linux-pwm@vger.kernel.org Cc: Mark Brown , Liam Girdwood , Bryan Wu , Richard Purdie , Jacek Anaszewski , linux-leds@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Jean-Christophe Plagniol-Villard , Tomi Valkeinen , linux-fbdev@vger.kernel.org, Stephen Warren , Alexandre Courbot , linux-tegra@vger.kernel.org, Maxime Ripard , Jingoo Han , Lee Jones , Doug Anderson , Boris Brezillon Subject: [RFC PATCH 03/15] pwm: add pwm_get_polarity helper function Date: Wed, 1 Jul 2015 10:21:49 +0200 Message-Id: <1435738921-25027-4-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1435738921-25027-1-git-send-email-boris.brezillon@free-electrons.com> References: <1435738921-25027-1-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 Some drivers are directly accessing the ->polarity field in pwm_device. Add an helper to retrieve the current polarity so that we can easily move this field elsewhere (required to support atomic update). Signed-off-by: Boris Brezillon --- include/linux/pwm.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/pwm.h b/include/linux/pwm.h index d8f6913..6f286df 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -124,6 +124,11 @@ static inline unsigned int pwm_get_duty_cycle(const struct pwm_device *pwm) */ int pwm_set_polarity(struct pwm_device *pwm, enum pwm_polarity polarity); +static inline enum pwm_polarity pwm_get_polarity(const struct pwm_device *pwm) +{ + return pwm ? pwm->polarity : PWM_POLARITY_NORMAL; +} + /** * struct pwm_ops - PWM controller operations * @request: optional hook for requesting a PWM