Commit 68738422 authored by Yoshihiro Shimoda's avatar Yoshihiro Shimoda Committed by Thierry Reding
Browse files

pwm: rcar: Add suspend/resume support 



This patch adds suspend/resume support for Renesas PWM driver.

Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent f2e6142c

drivers/pwm/pwm-rcar.c

+42 −0
Original line number Diff line number Diff line
@@ -258,11 +258,53 @@ static const struct of_device_id rcar_pwm_of_table[] = { 
};

MODULE_DEVICE_TABLE(of, rcar_pwm_of_table);



#ifdef CONFIG_PM_SLEEP

static struct pwm_device *rcar_pwm_dev_to_pwm_dev(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct rcar_pwm_chip *rcar_pwm = platform_get_drvdata(pdev);

	struct pwm_chip *chip = &rcar_pwm->chip;



	return &chip->pwms[0];

}



static int rcar_pwm_suspend(struct device *dev)

{

	struct pwm_device *pwm = rcar_pwm_dev_to_pwm_dev(dev);



	if (!test_bit(PWMF_REQUESTED, &pwm->flags))

		return 0;



	pm_runtime_put(dev);



	return 0;

}



static int rcar_pwm_resume(struct device *dev)

{

	struct pwm_device *pwm = rcar_pwm_dev_to_pwm_dev(dev);



	if (!test_bit(PWMF_REQUESTED, &pwm->flags))

		return 0;



	pm_runtime_get_sync(dev);



	rcar_pwm_config(pwm->chip, pwm, pwm->state.duty_cycle,

			pwm->state.period);

	if (pwm_is_enabled(pwm))

		rcar_pwm_enable(pwm->chip, pwm);



	return 0;

}

#endif /* CONFIG_PM_SLEEP */

static SIMPLE_DEV_PM_OPS(rcar_pwm_pm_ops, rcar_pwm_suspend, rcar_pwm_resume);



static struct platform_driver rcar_pwm_driver = {

	.probe = rcar_pwm_probe,

	.remove = rcar_pwm_remove,

	.driver = {

		.name = "pwm-rcar",

		.pm	= &rcar_pwm_pm_ops,

		.of_match_table = of_match_ptr(rcar_pwm_of_table),

	}

};