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phy: stm32: restore utmi switch on resume

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UTMI switch value can be lost during suspend/resume, depending on the power
state reached.
This patch adds resume function to usbphyc, to reconfigure utmi switch
after suspend.

Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20211015161427.220784-2-amelie.delaunay@foss.st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Amelie Delaunay 2021-10-15 18:14:25 +02:00 committed by Vinod Koul
parent 4ff6b676ba
commit 95e38c17d9
1 changed files with 13 additions and 0 deletions
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13
drivers/phy/st/phy-stm32-usbphyc.c
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@ -598,6 +598,18 @@ static int stm32_usbphyc_remove(struct platform_device *pdev)
return 0;
}
static int __maybe_unused stm32_usbphyc_resume(struct device *dev)
{
struct stm32_usbphyc *usbphyc = dev_get_drvdata(dev);
if (usbphyc->switch_setup >= 0)
stm32_usbphyc_switch_setup(usbphyc, usbphyc->switch_setup);
return 0;
}
static SIMPLE_DEV_PM_OPS(stm32_usbphyc_pm_ops, NULL, stm32_usbphyc_resume);
static const struct of_device_id stm32_usbphyc_of_match[] = {
{ .compatible = "st,stm32mp1-usbphyc", },
{ },
@ -610,6 +622,7 @@ static struct platform_driver stm32_usbphyc_driver = {
.driver = {
.of_match_table = stm32_usbphyc_of_match,
.name = "stm32-usbphyc",
.pm = &stm32_usbphyc_pm_ops,
}
};
module_platform_driver(stm32_usbphyc_driver);