pwm: rcar: Add suspend/resume support
This patch adds suspend/resume support for Renesas PWM driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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@ -258,11 +258,53 @@ static const struct of_device_id rcar_pwm_of_table[] = {
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};
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MODULE_DEVICE_TABLE(of, rcar_pwm_of_table);
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#ifdef CONFIG_PM_SLEEP
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static struct pwm_device *rcar_pwm_dev_to_pwm_dev(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct rcar_pwm_chip *rcar_pwm = platform_get_drvdata(pdev);
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struct pwm_chip *chip = &rcar_pwm->chip;
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return &chip->pwms[0];
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}
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static int rcar_pwm_suspend(struct device *dev)
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{
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struct pwm_device *pwm = rcar_pwm_dev_to_pwm_dev(dev);
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if (!test_bit(PWMF_REQUESTED, &pwm->flags))
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return 0;
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pm_runtime_put(dev);
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return 0;
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}
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static int rcar_pwm_resume(struct device *dev)
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{
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struct pwm_device *pwm = rcar_pwm_dev_to_pwm_dev(dev);
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if (!test_bit(PWMF_REQUESTED, &pwm->flags))
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return 0;
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pm_runtime_get_sync(dev);
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rcar_pwm_config(pwm->chip, pwm, pwm->state.duty_cycle,
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pwm->state.period);
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if (pwm_is_enabled(pwm))
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rcar_pwm_enable(pwm->chip, pwm);
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return 0;
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}
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#endif /* CONFIG_PM_SLEEP */
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static SIMPLE_DEV_PM_OPS(rcar_pwm_pm_ops, rcar_pwm_suspend, rcar_pwm_resume);
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static struct platform_driver rcar_pwm_driver = {
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.probe = rcar_pwm_probe,
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.remove = rcar_pwm_remove,
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.driver = {
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.name = "pwm-rcar",
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.pm = &rcar_pwm_pm_ops,
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.of_match_table = of_match_ptr(rcar_pwm_of_table),
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}
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};
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