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usb: dwc2: disable external vbus supply when the device is removed

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This patch adds an interface to disable the power in dwc2 driver.
This new interface is called when the device is removed.

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Christophe Kerello 2018-03-15 18:00:30 +01:00 committed by Marek Vasut
parent 6048d42fa7
commit 82e7975b85
1 changed files with 35 additions and 3 deletions
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38
drivers/usb/host/dwc2.c
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@ -34,6 +34,9 @@ struct dwc2_priv {
#ifdef CONFIG_DM_USB
uint8_t aligned_buffer[DWC2_DATA_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN);
uint8_t status_buffer[DWC2_STATUS_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN);
#ifdef CONFIG_DM_REGULATOR
struct udevice *vbus_supply;
#endif
#else
uint8_t *aligned_buffer;
uint8_t *status_buffer;
@ -168,16 +171,17 @@ static void dwc_otg_core_reset(struct dwc2_core_regs *regs)
#if defined(CONFIG_DM_USB) && defined(CONFIG_DM_REGULATOR)
static int dwc_vbus_supply_init(struct udevice *dev)
{
struct udevice *vbus_supply;
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
ret = device_get_supply_regulator(dev, "vbus-supply", &vbus_supply);
ret = device_get_supply_regulator(dev, "vbus-supply",
&priv->vbus_supply);
if (ret) {
debug("%s: No vbus supply\n", dev->name);
return 0;
}
ret = regulator_set_enable(vbus_supply, true);
ret = regulator_set_enable(priv->vbus_supply, true);
if (ret) {
pr_err("Error enabling vbus supply\n");
return ret;
@ -185,11 +189,34 @@ static int dwc_vbus_supply_init(struct udevice *dev)
return 0;
}
static int dwc_vbus_supply_exit(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
if (priv->vbus_supply) {
ret = regulator_set_enable(priv->vbus_supply, false);
if (ret) {
dev_err(dev, "Error disabling vbus supply\n");
return ret;
}
}
return 0;
}
#else
static int dwc_vbus_supply_init(struct udevice *dev)
{
return 0;
}
#if defined(CONFIG_DM_USB)
static int dwc_vbus_supply_exit(struct udevice *dev)
{
return 0;
}
#endif
#endif
/*
@ -1269,6 +1296,11 @@ static int dwc2_usb_probe(struct udevice *dev)
static int dwc2_usb_remove(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
ret = dwc_vbus_supply_exit(dev);
if (ret)
return ret;
dwc2_uninit_common(priv->regs);