Commit 98761ce4 authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Thierry Reding
Browse files

pwm: spear: Implement .apply() callback 



Just using the previous callbacks to implment a similar procedure as the
legacy handling in the core.

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent da0dea89

drivers/pwm/pwm-spear.c

+29 −4
Original line number Diff line number Diff line
@@ -75,7 +75,7 @@ static inline void spear_pwm_writel(struct spear_pwm_chip *chip, 
}



static int spear_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,

			    int duty_ns, int period_ns)

			    u64 duty_ns, u64 period_ns)

{

	struct spear_pwm_chip *pc = to_spear_pwm_chip(chip);

	u64 val, div, clk_rate;
@@ -163,10 +163,35 @@ static void spear_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) 
	clk_disable(pc->clk);

}



static int spear_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,

			   const struct pwm_state *state)

{

	int err;



	if (state->polarity != PWM_POLARITY_NORMAL)

		return -EINVAL;



	if (!state->enabled) {

		if (pwm->state.enabled)

			spear_pwm_disable(chip, pwm);

		return 0;

	}



	if (state->period != pwm->state.period ||

	    state->duty_cycle != pwm->state.duty_cycle) {

		err = spear_pwm_config(chip, pwm, state->duty_cycle, state->period);

		if (err)

			return err;

	}



	if (!pwm->state.enabled)

		return spear_pwm_enable(chip, pwm);



	return 0;

}



static const struct pwm_ops spear_pwm_ops = {

	.config = spear_pwm_config,

	.enable = spear_pwm_enable,

	.disable = spear_pwm_disable,

	.apply = spear_pwm_apply,

	.owner = THIS_MODULE,

};