[PATCH v2] pwm: bcm2835: Add support for suspend/resume
From: Florian Fainelli <florian.fainelli@broadcom.com>
Date: 2023-10-09 20:42:38
Also in:
linux-pwm, lkml
Subsystem:
pwm subsystem, the rest · Maintainers:
Uwe Kleine-König, Linus Torvalds
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 <redacted> Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com> --- Changes in v2: - use DEFINE_SIMPLE_DEV_PM_OPS as suggested by Uwe drivers/pwm/pwm-bcm2835.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/pwm/pwm-bcm2835.c b/drivers/pwm/pwm-bcm2835.c
index bdfc2a5ec0d6..938f993ae746 100644
--- a/drivers/pwm/pwm-bcm2835.c
+++ b/drivers/pwm/pwm-bcm2835.c@@ -182,6 +182,25 @@ static void bcm2835_pwm_remove(struct platform_device *pdev) clk_disable_unprepare(pc->clk); } +static int __maybe_unused bcm2835_pwm_suspend(struct device *dev) +{ + struct bcm2835_pwm *pc = dev_get_drvdata(dev); + + clk_disable_unprepare(pc->clk); + + return 0; +} + +static int __maybe_unused 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[] = { { .compatible = "brcm,bcm2835-pwm", }, { /* sentinel */ }
@@ -192,6 +211,7 @@ static struct platform_driver bcm2835_pwm_driver = { .driver = { .name = "bcm2835-pwm", .of_match_table = bcm2835_pwm_of_match, + .pm = &bcm2835_pwm_pm_ops, }, .probe = bcm2835_pwm_probe, .remove_new = bcm2835_pwm_remove,
--
2.34.1