From: Christophe Kerello christophe.kerello@st.com
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 --- drivers/usb/host/dwc2.c | 38 +++++++++++++++++++++++++++++++++++--- 1 file changed, 35 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index 0efe645044c5..cd70b2a195ca 100644 --- a/drivers/usb/host/dwc2.c +++ b/drivers/usb/host/dwc2.c @@ -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);