usb: phy: samsung: Add PHY support for USB 3.0 controller

[~andy/linux] / Documentation / devicetree / bindings / usb / samsung-usbphy.txt

diff --git a/Documentation/devicetree/bindings/usb/samsung-usbphy.txt b/Documentation/devicetree/bindings/usb/samsung-usbphy.txt
index 96940abe9a57b93ae8788bc7c2a35ca15c6e7bcd..f575302e5173032143347644c0c29b9591936cc9 100644 (file)
--- a/Documentation/devicetree/bindings/usb/samsung-usbphy.txt
+++ b/Documentation/devicetree/bindings/usb/samsung-usbphy.txt
@@ -61,3 +61,57 @@ Example:
                        reg = <0x10020704 0x8>;
                };
        };
+
+
+** Samsung's usb 3.0 phy transceiver
+
+Starting exynso5250, Samsung's SoC have usb 3.0 phy transceiver
+which is used for controlling usb 3.0 phy for dwc3-exynos usb 3.0
+controllers across Samsung SOCs.
+
+Required properties:
+
+Exynos5250:
+- compatible : should be "samsung,exynos5250-usb3phy"
+- reg : base physical address of the phy registers and length of memory mapped
+       region.
+- clocks: Clock IDs array as required by the controller.
+- clock-names: names of clocks correseponding to IDs in the clock property
+              as requested by the controller driver.
+
+Optional properties:
+- #address-cells: should be '1' when usbphy node has a child node with 'reg'
+                 property.
+- #size-cells: should be '1' when usbphy node has a child node with 'reg'
+              property.
+- ranges: allows valid translation between child's address space and parent's
+         address space.
+
+- The child node 'usbphy-sys' to the node 'usbphy' is for the system controller
+  interface for usb-phy. It should provide the following information required by
+  usb-phy controller to control phy.
+  - reg : base physical address of PHY_CONTROL registers.
+         The size of this register is the total sum of size of all PHY_CONTROL
+         registers that the SoC has. For example, the size will be
+         '0x4' in case we have only one PHY_CONTROL register (e.g.
+         OTHERS register in S3C64XX or USB_PHY_CONTROL register in S5PV210)
+         and, '0x8' in case we have two PHY_CONTROL registers (e.g.
+         USBDEVICE_PHY_CONTROL and USBHOST_PHY_CONTROL registers in exynos4x).
+         and so on.
+
+Example:
+       usbphy@12100000 {
+               compatible = "samsung,exynos5250-usb3phy";
+               reg = <0x12100000 0x100>;
+               #address-cells = <1>;
+               #size-cells = <1>;
+               ranges;
+
+               clocks = <&clock 1>, <&clock 286>;
+               clock-names = "ext_xtal", "usbdrd30";
+
+               usbphy-sys {
+                       /* USB device and host PHY_CONTROL registers */
+                       reg = <0x10040704 0x8>;
+               };
+       };