phy: amlogic: phy-meson-gxl-usb2: default to host mode

The USB2 PHY can switch between PHY_MODE_USB_HOST and
PHY_MODE_USB_DEVICE. However, it cannot do it on it's own since it
requires re-routing of the corresponding USB pins from dwc3 (which is
used for host-mode) to dwc2 (which is used for device-mode).
Thus we don't need to auto-detect the mode based on the USB controller,
which simplifies the driver code.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/amlogic/Kconfig

@@ -18,7 +18,6 @@ config PHY_MESON_GXL_USB2
 	default ARCH_MESON
 	depends on OF && (ARCH_MESON || COMPILE_TEST)
 	depends on USB_SUPPORT
-	select USB_COMMON
 	select GENERIC_PHY
 	select REGMAP_MMIO
 	help

drivers/phy/amlogic/phy-meson-gxl-usb2.c

@@ -20,7 +20,6 @@
 #include <linux/reset.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
-#include <linux/usb/of.h>
 
 /* bits [31:27] are read-only */
 #define U2P_R0							0x0
@@ -254,18 +253,8 @@ static int phy_meson_gxl_usb2_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	switch (of_usb_get_dr_mode_by_phy(dev->of_node, -1)) {
-	case USB_DR_MODE_PERIPHERAL:
-		priv->mode = PHY_MODE_USB_DEVICE;
-		break;
-	case USB_DR_MODE_OTG:
-		priv->mode = PHY_MODE_USB_OTG;
-		break;
-	case USB_DR_MODE_HOST:
-	default:
-		priv->mode = PHY_MODE_USB_HOST;
-		break;
-	}
+	/* start in host mode */
+	priv->mode = PHY_MODE_USB_HOST;
 
 	priv->regmap = devm_regmap_init_mmio(dev, base,
 					     &phy_meson_gxl_usb2_regmap_conf);