generic-phy: add generic_phy_get_by_node()

Add generic_phy_get_by_node() to get a PHY phandle from a node instead
of a udevice.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
[narmstrong: fixed by including ofnode.h in generic-phy.h]

2 files changed, 40 insertions, 5 deletions

diff --git a/drivers/phy/phy-uclass.c b/drivers/phy/phy-uclass.c
index e201a90c8c..e463b0b400 100644
--- a/drivers/phy/phy-uclass.c
+++ b/drivers/phy/phy-uclass.c
@@ -31,20 +31,20 @@ static int generic_phy_xlate_offs_flags(struct phy *phy,
 	return 0;
 }
 
-int generic_phy_get_by_index(struct udevice *dev, int index,
-			     struct phy *phy)
+int generic_phy_get_by_node(ofnode node, int index, struct phy *phy)
 {
 	struct ofnode_phandle_args args;
 	struct phy_ops *ops;
 	struct udevice *phydev;
 	int i, ret;
 
-	debug("%s(dev=%p, index=%d, phy=%p)\n", __func__, dev, index, phy);
+	debug("%s(node=%s, index=%d, phy=%p)\n",
+	      __func__, ofnode_get_name(node), index, phy);
 
 	assert(phy);
 	phy->dev = NULL;
-	ret = dev_read_phandle_with_args(dev, "phys", "#phy-cells", 0, index,
-					 &args);
+	ret = ofnode_parse_phandle_with_args(node, "phys", "#phy-cells", 0,
+					     index, &args);
 	if (ret) {
 		debug("%s: dev_read_phandle_with_args failed: err=%d\n",
 		      __func__, ret);
@@ -90,6 +90,12 @@ err:
 	return ret;
 }
 
+int generic_phy_get_by_index(struct udevice *dev, int index,
+			     struct phy *phy)
+{
+	return generic_phy_get_by_node(dev_ofnode(dev), index, phy);
+}
+
 int generic_phy_get_by_name(struct udevice *dev, const char *phy_name,
 			    struct phy *phy)
 {
diff --git a/include/generic-phy.h b/include/generic-phy.h
index 95caf58341..73537025c2 100644
--- a/include/generic-phy.h
+++ b/include/generic-phy.h
@@ -7,6 +7,8 @@
 #ifndef __GENERIC_PHY_H
 #define __GENERIC_PHY_H
 
+#include <dm/ofnode.h>
+
 struct ofnode_phandle_args;
 
 /**
@@ -194,6 +196,33 @@ int generic_phy_get_by_index(struct udevice *user, int index,
 			     struct phy *phy);
 
 /**
+ * generic_phy_get_by_node() - Get a PHY device by integer index on ofnode
+ *
+ * @node:	the device node
+ * @index:	The index in the list of available PHYs
+ * @phy:	A pointer to the PHY port
+ *
+ * This looks up a PHY device for a client device based on its ofnode and on
+ * its position in the list of the possible PHYs.
+ *
+ * example:
+ * usb1: usb_otg_ss@xxx {
+ *       compatible = "xxx";
+ *       reg = <xxx>;
+ *   .
+ *   .
+ *   phys = <&usb2_phy>, <&usb3_phy>;
+ *   .
+ *   .
+ * };
+ * the USB2 phy can be accessed by passing index '0' and the USB3 phy can
+ * be accessed by passing index '1'
+ *
+ * @return 0 if OK, or a negative error code
+ */
+int generic_phy_get_by_node(ofnode node, int index, struct phy *phy);
+
+/**
  * generic_phy_get_by_name() - Get a PHY device by its name.
  *
  * @user:	the client device