From patchwork Sat Jan 6 16:58:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 856419 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=crapouillou.net header.i=@crapouillou.net header.b="kwuDbArM"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3zDSfl4ntnz9s7G for ; Sun, 7 Jan 2018 04:08:31 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753680AbeAFRIa (ORCPT ); Sat, 6 Jan 2018 12:08:30 -0500 Received: from outils.crapouillou.net ([89.234.176.41]:34208 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753636AbeAFRIa (ORCPT ); Sat, 6 Jan 2018 12:08:30 -0500 X-Greylist: delayed 579 seconds by postgrey-1.27 at vger.kernel.org; Sat, 06 Jan 2018 12:08:29 EST From: Paul Cercueil To: Thierry Reding , Rob Herring , Mark Rutland Cc: linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Cercueil Subject: [PATCH 2/4] pwm: pwm-jz4740: Implement set_polarity Date: Sat, 6 Jan 2018 17:58:41 +0100 Message-Id: <20180106165843.3461-2-paul@crapouillou.net> In-Reply-To: <20180106165843.3461-1-paul@crapouillou.net> References: <20180106165843.3461-1-paul@crapouillou.net> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1515257929; bh=7VW1A2f8sNzbi/WnRIsGGIAlO/Xcao78CvrdgYHqljM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=kwuDbArMV4UXpXEiRsBMEAa+/rPw2AYwgHAY7d+i8jMe9uNdu986PkBeHa/RKTqYtAytcIZ9w7MSA9aYyXVGKD0oMcaWf+OaxzCmDSzLR72eoKGuYe8ReH2oBjyEsE7TV7U5E6auCuhW8d+4IfCa+7Hc85s0roVmGfUQMACZAyI= Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org This permits clients of this driver to specify the polarity to use for their PWM channel. Signed-off-by: Paul Cercueil --- drivers/pwm/pwm-jz4740.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c index 2e41ba213f39..6539c001fe32 100644 --- a/drivers/pwm/pwm-jz4740.c +++ b/drivers/pwm/pwm-jz4740.c @@ -130,10 +130,29 @@ static int jz4740_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, return 0; } +static int jz4740_pwm_set_polarity(struct pwm_chip *chip, + struct pwm_device *pwm, enum pwm_polarity polarity) +{ + uint32_t ctrl = jz4740_timer_get_ctrl(pwm->pwm); + + switch (polarity) { + case PWM_POLARITY_NORMAL: + ctrl &= ~JZ_TIMER_CTRL_PWM_ACTIVE_LOW; + break; + case PWM_POLARITY_INVERSED: + ctrl |= JZ_TIMER_CTRL_PWM_ACTIVE_LOW; + break; + } + + jz4740_timer_set_ctrl(pwm->hwpwm, ctrl); + return 0; +} + static const struct pwm_ops jz4740_pwm_ops = { .request = jz4740_pwm_request, .free = jz4740_pwm_free, .config = jz4740_pwm_config, + .set_polarity = jz4740_pwm_set_polarity, .enable = jz4740_pwm_enable, .disable = jz4740_pwm_disable, .owner = THIS_MODULE,