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pwm: bcm2835: Add support for suspend/resume

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Similar to other drivers, we need to make sure that the clock is
disabled during suspend and re-enabled during resume.

Reported-by: Angus Clark <angus.clark@broadcom.com>
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Florian Fainelli 2023-10-11 10:07:17 -07:00 • committed by Thierry Reding
parent aacbd65436
commit 119a508c4d
1 changed files with 20 additions and 0 deletions
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20
drivers/pwm/pwm-bcm2835.c
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@ -163,6 +163,25 @@ static int bcm2835_pwm_probe(struct platform_device *pdev)
return 0; return 0;
} }
static int bcm2835_pwm_suspend(struct device *dev)
{
struct bcm2835_pwm *pc = dev_get_drvdata(dev);
clk_disable_unprepare(pc->clk);
return 0;
}
static int bcm2835_pwm_resume(struct device *dev)
{
struct bcm2835_pwm *pc = dev_get_drvdata(dev);
return clk_prepare_enable(pc->clk);
}
static DEFINE_SIMPLE_DEV_PM_OPS(bcm2835_pwm_pm_ops, bcm2835_pwm_suspend,
bcm2835_pwm_resume);
static const struct of_device_id bcm2835_pwm_of_match[] = { static const struct of_device_id bcm2835_pwm_of_match[] = {
{ .compatible = "brcm,bcm2835-pwm", }, { .compatible = "brcm,bcm2835-pwm", },
{ /* sentinel */ } { /* sentinel */ }
@ -173,6 +192,7 @@ static struct platform_driver bcm2835_pwm_driver = {
.driver = { .driver = {
.name = "bcm2835-pwm", .name = "bcm2835-pwm",
.of_match_table = bcm2835_pwm_of_match, .of_match_table = bcm2835_pwm_of_match,
.pm = pm_ptr(&bcm2835_pwm_pm_ops),
}, },
.probe = bcm2835_pwm_probe, .probe = bcm2835_pwm_probe,
}; };