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Subject[PATCH v2 1/3] phy: stm32: restore utmi switch on resume
Date
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>
---
drivers/phy/st/phy-stm32-usbphyc.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/phy/st/phy-stm32-usbphyc.c b/drivers/phy/st/phy-stm32-usbphyc.c
index 937a14fa7448..083593aea53a 100644
--- a/drivers/phy/st/phy-stm32-usbphyc.c
+++ b/drivers/phy/st/phy-stm32-usbphyc.c
@@ -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);
--
2.25.1
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