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phy: stm32: manage optional vbus regulator on phy_power_on/off

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This patch adds support for optional vbus regulator.
It is managed on phy_power_on/off calls and may be needed for host mode.

Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20210517120821.26466-3-amelie.delaunay@foss.st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Amelie Delaunay 2021-05-17 14:08:21 +02:00 committed by Vinod Koul
parent 436b6403db
commit 51770dae60
1 changed files with 31 additions and 0 deletions
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31
drivers/phy/st/phy-stm32-usbphyc.c
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@ -57,6 +57,7 @@ struct pll_params {
struct stm32_usbphyc_phy {
struct phy *phy;
struct stm32_usbphyc *usbphyc;
struct regulator *vbus;
u32 index;
bool active;
};
@ -291,9 +292,31 @@ static int stm32_usbphyc_phy_exit(struct phy *phy)
return stm32_usbphyc_pll_disable(usbphyc);
}
static int stm32_usbphyc_phy_power_on(struct phy *phy)
{
struct stm32_usbphyc_phy *usbphyc_phy = phy_get_drvdata(phy);
if (usbphyc_phy->vbus)
return regulator_enable(usbphyc_phy->vbus);
return 0;
}
static int stm32_usbphyc_phy_power_off(struct phy *phy)
{
struct stm32_usbphyc_phy *usbphyc_phy = phy_get_drvdata(phy);
if (usbphyc_phy->vbus)
return regulator_disable(usbphyc_phy->vbus);
return 0;
}
static const struct phy_ops stm32_usbphyc_phy_ops = {
.init = stm32_usbphyc_phy_init,
.exit = stm32_usbphyc_phy_exit,
.power_on = stm32_usbphyc_phy_power_on,
.power_off = stm32_usbphyc_phy_power_off,
.owner = THIS_MODULE,
};
@ -519,6 +542,14 @@ static int stm32_usbphyc_probe(struct platform_device *pdev)
usbphyc->phys[port]->index = index;
usbphyc->phys[port]->active = false;
usbphyc->phys[port]->vbus = devm_regulator_get_optional(&phy->dev, "vbus");
if (IS_ERR(usbphyc->phys[port]->vbus)) {
ret = PTR_ERR(usbphyc->phys[port]->vbus);
if (ret == -EPROBE_DEFER)
goto put_child;
usbphyc->phys[port]->vbus = NULL;
}
port++;
}