commit a1b2faed7cbaf23d4af8a629c4db1bebb8e99d1b
author Patrice Chotard <patrice.chotard@st.com> Wed Jun 27 11:55:42 2018 +0200
committer Tom Rini <trini@konsulko.com> Thu Jul 19 16:31:35 2018 -0400
tree 50193c57b1ecf9a3f6ec1cc14cc0f722b6bb932d
parent 7d118161bbfbeb21ff2f6bf8ccc3cc0a8dd6ddc6

phy: Be able to get phy from PHY provider

In case of phy are provided from a PHY provider nodes as following:

usbphyc: usb-phy@5a006000 {
	compatible = "st,stm32mp1-usbphyc";
	reg = <0x5a006000 0x1000>;
	clocks = <&rcc_clk USBPHY_K>;
	resets = <&rcc_rst USBPHY_R>;
	#address-cells = <1>;
	#size-cells = <0>;

	usbphyc_port0: usb-phy@0 {
		reg = <0>;
		phy-supply = <&vdd_usb>;
		vdda1v1-supply = <&reg11>;
		vdda1v8-supply = <&reg18>
		#phy-cells = <0>;
	};

	usbphyc_port1: usb-phy@1 {
		reg = <1>;
		phy-supply = <&vdd_usb>;
		vdda1v1-supply = <&reg11>;
		vdda1v8-supply = <&reg18>
		#phy-cells = <1>;
	};
};

and PHY are called as following:

usbh_ehci: usbh-ehci@5800d000 {
	compatible = "generic-ehci";
	reg = <0x5800d000 0x1000>;
	clocks = <&rcc_clk USBH>;
	resets = <&rcc_rst USBH_R>;
	interrupts = <GIC_SPI 75 IRQ_TYPE_NONE>;
	companion = <&usbh_ohci>;
	phys = <&usbphyc_port0>;
	phy-names = "usb";
	status = "okay";
};

generic_phy_get_by_index() must be updated to first look for
PHY phandle as previously and in case of error looks for PHY
provider by finding the parent's current node which is the PHY
provider.
args (ofnode_phandle_args struct) must also be updated by inserting
the phy index into the PHY provider as args[0].

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

drivers/phy/phy-uclass.c

diff --git a/drivers/phy/phy-uclass.c b/drivers/phy/phy-uclass.c
index c4b3e40..6162395 100644
--- a/drivers/phy/phy-uclass.c
+++ b/drivers/phy/phy-uclass.c
@@ -36,8 +36,8 @@
 {
 	struct ofnode_phandle_args args;
 	struct phy_ops *ops;
-	int ret;
 	struct udevice *phydev;
+	int i, ret;
 
 	debug("%s(dev=%p, index=%d, phy=%p)\n", __func__, dev, index, phy);
 
@@ -55,7 +55,20 @@
 	if (ret) {
 		debug("%s: uclass_get_device_by_ofnode failed: err=%d\n",
 		      __func__, ret);
-		return ret;
+
+		/* Check if args.node's parent is a PHY provider */
+		ret = uclass_get_device_by_ofnode(UCLASS_PHY,
+						  ofnode_get_parent(args.node),
+						  &phydev);
+		if (ret)
+			return ret;
+
+		/* insert phy idx at first position into args array */
+		for (i = args.args_count; i > 1 ; i--)
+			args.args[i] = args.args[i - 1];
+
+		args.args_count++;
+		args.args[0] = ofnode_read_u32_default(args.node, "reg", -1);
 	}
 
 	phy->dev = phydev;