linux-kernel - [PATCH 4/5] dt-bindings: phy: Modify Broadcom NS USB 3.0 PHY binding to use MDIO

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Date:   Thu, 11 May 2017 15:29:24 +0200
From:   Rafał Miłecki <zajec5@...il.com>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH 4/5] dt-bindings: phy: Modify Broadcom NS USB 3.0 PHY binding to use MDIO

From: Rafał Miłecki <rafal@...ecki.pl>

Thanks to work done by Broadcom explaining their USB 3.0 PHY details we
know it's attached to the MDIO bus. Use this knowledge to update the
binding: make it a subnode to the MDIO bus and rework way of specifying
required registers.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 .../devicetree/bindings/phy/bcm-ns-usb3-phy.txt    | 27 +++++++++++++++-------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/bcm-ns-usb3-phy.txt b/Documentation/devicetree/bindings/phy/bcm-ns-usb3-phy.txt
index 09aeba94538d..32f057260351 100644
--- a/Documentation/devicetree/bindings/phy/bcm-ns-usb3-phy.txt
+++ b/Documentation/devicetree/bindings/phy/bcm-ns-usb3-phy.txt
@@ -3,9 +3,10 @@ Driver for Broadcom Northstar USB 3.0 PHY
 Required properties:
 
 - compatible: one of: "brcm,ns-ax-usb3-phy", "brcm,ns-bx-usb3-phy".
-- reg: register mappings for DMP (Device Management Plugin) and ChipCommon B
-       MMI.
-- reg-names: "dmp" and "ccb-mii"
+- reg: address of MDIO bus device
+- usb3-dmp-syscon: phandle to syscon with DMP (Device Management Plugin)
+		   registers
+- #phy-cells: must be 0
 
 Initialization of USB 3.0 PHY depends on Northstar version. There are currently
 three known series: Ax, Bx and Cx.
@@ -15,9 +16,19 @@ Known B1: BCM4707 rev 6
 Known C0: BCM47094 rev 0
 
 Example:
-	usb3-phy {
-		compatible = "brcm,ns-ax-usb3-phy";
-		reg = <0x18105000 0x1000>, <0x18003000 0x1000>;
-		reg-names = "dmp", "ccb-mii";
-		#phy-cells = <0>;
+	mdio: mdio@0 {
+		reg = <0x0>;
+		#size-cells = <1>;
+		#address-cells = <0>;
+
+		usb3-phy@10 {
+			compatible = "brcm,ns-ax-usb3-phy";
+			reg = <0x10>;
+			usb3-dmp-syscon = <&usb3_dmp>;
+			#phy-cells = <0>;
+		};
+	};
+
+	usb3_dmp: syscon@...05000 {
+		reg = <0x18105000 0x1000>;
 	};
-- 
2.11.0