diff options
author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2018-03-13 17:18:18 +0900 |
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committer | Thierry Reding <thierry.reding@gmail.com> | 2018-03-28 01:27:10 +0200 |
commit | 6873842235d678a245a378669f35e145df2441b9 (patch) | |
tree | 55d816b80307661b9445960ade1c1ca21f23a4f6 /drivers | |
parent | f2e6142cdc10b1b7edea8d65b07293f152e4d110 (diff) |
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>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/pwm/pwm-rcar.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c index f4d8767f804e..91d11f2e2fef 100644 --- a/drivers/pwm/pwm-rcar.c +++ b/drivers/pwm/pwm-rcar.c @@ -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), } }; |