From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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> References: <20180106165843.3461-1-paul@crapouillou.net> Return-path: In-Reply-To: <20180106165843.3461-1-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Thierry Reding , Rob Herring , Mark Rutland Cc: linux-pwm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Paul Cercueil List-Id: devicetree@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, -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html