phy: sun4i: add support for USB phy0

The driver for sun4i USB phys currently supports only phy1 and phy2 which are used for USB host controllers. This patch adds support for USB phy0, which is used by the musb hdrc USB controller. Signed-off-by: Roman Byshko <[email protected]> Acked-by: Maxime Ripard <[email protected]> Signed-off-by: Kishon Vijay Abraham I <[email protected]>
torvalds · Nov 13, 2014 · 6827a46 · 6827a46
1 parent 491e049
commit 6827a46
Showing 1 changed file with 6 additions and 3 deletions.
diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
@@ -157,6 +157,10 @@ static int sun4i_usb_phy_init(struct phy *_phy)
 		return ret;
 	}
 
+	/* Enable USB 45 Ohm resistor calibration */
+	if (phy->index == 0)
+		sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
+
 	/* Adjust PHY's magnitude and rate */
 	sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
 
@@ -213,7 +217,7 @@ static struct phy *sun4i_usb_phy_xlate(struct device *dev,
 {
 	struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 
-	if (WARN_ON(args->args[0] == 0 || args->args[0] >= data->num_phys))
+	if (args->args[0] >= data->num_phys)
 		return ERR_PTR(-ENODEV);
 
 	return data->phys[args->args[0]].phy;
@@ -255,8 +259,7 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
 	if (IS_ERR(data->base))
 		return PTR_ERR(data->base);
 
-	/* Skip 0, 0 is the phy for otg which is not yet supported. */
-	for (i = 1; i < data->num_phys; i++) {
+	for (i = 0; i < data->num_phys; i++) {
 		struct sun4i_usb_phy *phy = data->phys + i;
 		char name[16];