From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753853AbeAFQ70 (ORCPT + 1 other); Sat, 6 Jan 2018 11:59:26 -0500 Received: from outils.crapouillou.net ([89.234.176.41]:60766 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753580AbeAFQ6v (ORCPT ); Sat, 6 Jan 2018 11:58:51 -0500 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> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: 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, -- 2.11.0