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

Rafał Miłecki
2017-05-11T13:30:04Z

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@milecki.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@18105000 {
+ reg = <0x18105000 0x1000>;
};
--
2.11.0