Commit 174dcc8e authored by Paul Cercueil's avatar Paul Cercueil Committed by Thierry Reding
Browse files

pwm: jz4740: Implement ->set_polarity() 



This permits clients of this driver to specify the polarity to use for
their PWM channel.

Signed-off-by: default avatarPaul Cercueil <paul@crapouillou.net>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent df56b171

drivers/pwm/pwm-jz4740.c

+19 −0
Original line number Diff line number Diff line
@@ -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,