usb: host: xhci-rockchip: use fixed regulator to control vbus

Use fixed regulator to control the voltage of vbus. Enable vbus
supply when usb start and disable vbus supply when usb stop.

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

drivers/usb/host/xhci-rockchip.c

@@ -48,7 +48,7 @@ static int xhci_usb_ofdata_to_platdata(struct udevice *dev)
 	 */
 	plat->hcd_base = devfdt_get_addr(dev);
 	if (plat->hcd_base == FDT_ADDR_T_NONE) {
-		debug("Can't get the XHCI register base address\n");
+		error("Can't get the XHCI register base address\n");
 		return -ENXIO;
 	}
 
@@ -62,17 +62,15 @@ static int xhci_usb_ofdata_to_platdata(struct udevice *dev)
 	}
 
 	if (plat->phy_base == FDT_ADDR_T_NONE) {
-		debug("Can't get the usbphy register address\n");
+		error("Can't get the usbphy register address\n");
 		return -ENXIO;
 	}
 
-#if defined(CONFIG_DM_USB) && defined(CONFIG_DM_REGULATOR)
 	/* Vbus regulator */
 	ret = device_get_supply_regulator(dev, "vbus-supply",
 					  &plat->vbus_supply);
 	if (ret)
-		debug("Can't get vbus supply\n");
-#endif
+		debug("Can't get VBus regulator!\n");
 
 	return 0;
 }
@@ -121,7 +119,7 @@ static int rockchip_xhci_core_init(struct rockchip_xhci *rkxhci,
 
 	ret = dwc3_core_init(rkxhci->dwc3_reg);
 	if (ret) {
-		debug("failed to initialize core\n");
+		error("failed to initialize core\n");
 		return ret;
 	}
 
@@ -150,15 +148,17 @@ static int xhci_usb_probe(struct udevice *dev)
 	hcor = (struct xhci_hcor *)((uint64_t)ctx->hcd +
 			HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)));
 
-#if defined(CONFIG_DM_USB) && defined(CONFIG_DM_REGULATOR)
-	ret = regulator_set_enable(plat->vbus_supply, true);
-	if (ret)
-		debug("XHCI: Failed to enable vbus supply\n");
-#endif
+	if (plat->vbus_supply) {
+		ret = regulator_set_enable(plat->vbus_supply, true);
+		if (ret) {
+			error("XHCI: failed to set VBus supply\n");
+			return ret;
+		}
+	}
 
 	ret = rockchip_xhci_core_init(ctx, dev);
 	if (ret) {
-		debug("XHCI: failed to initialize controller\n");
+		error("XHCI: failed to initialize controller\n");
 		return ret;
 	}
 
@@ -178,13 +178,13 @@ static int xhci_usb_remove(struct udevice *dev)
 	if (ret)
 		return ret;
 
-#if defined(CONFIG_DM_USB) && defined(CONFIG_DM_REGULATOR)
-	ret = regulator_set_enable(plat->vbus_supply, false);
-	if (ret)
-		debug("XHCI: Failed to disable vbus supply\n");
-#endif
+	if (plat->vbus_supply) {
+		ret = regulator_set_enable(plat->vbus_supply, false);
+		if (ret)
+			error("XHCI: failed to set VBus supply\n");
+	}
 
-	return 0;
+	return ret;
 }
 
 static const struct udevice_id xhci_usb_ids[] = {