[U-Boot] [PATCH 4/5] usb: host: dwc2: add usb33d supply support for stm32mp1

[Patrick Delaunay]

Enable the usb33d-supply on STM32MP1 SoCs (with "st,stm32mp1-hsotg"
compatible), it is the external VBUS and ID sensing comparators supply
needed to perform OTG operation.

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 drivers/usb/host/dwc2.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index 836f706..1639bf2 100644
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -1411,6 +1411,24 @@ static int dwc2_usb_probe(struct udevice *dev)
 	if (ret)
 		return ret;
 
+	if (CONFIG_IS_ENABLED(ARCH_STM32MP) &&
+	    device_is_compatible(dev, "st,stm32mp1-hsotg")) {
+		struct udevice *usb33d_supply;
+
+		ret = device_get_supply_regulator(dev, "usb33d-supply",
+						  &usb33d_supply);
+		if (ret) {
+			dev_err(dev,
+				"can't get voltage level detector supply\n");
+		} else {
+			ret = regulator_set_enable(usb33d_supply, true);
+			if (ret) {
+				dev_err(dev,
+					"can't enable voltage level detector supply\n");
+			}
+		}
+	}
+
 	return dwc2_init_common(dev, priv);
 }
 
-- 
2.7.4