This patch adds the dt documentation for the usb picophy found on stih407 SoC family
available from STMicroelectronics.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx>
---
.../devicetree/bindings/phy/phy-stih407-usb.txt | 37 ++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 Documentation/devicetree/bindings/phy/phy-stih407-usb.txt
diff --git a/Documentation/devicetree/bindings/phy/phy-stih407-usb.txt b/Documentation/devicetree/bindings/phy/phy-stih407-usb.txt
new file mode 100644
index 0000000..650d346
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/phy-stih407-usb.txt
@@ -0,0 +1,37 @@
+ST STiH407 USB-PHY controller
+
+This file documents the dt bindings for the picoPHY driver which is the PHY for both USB2 and USB3 host controllers
+controllers available on STiH407 SoC families.
+
+On STiH410, we have to use the DWC3 port#2 with a picoPHY to manage USB2
+devices. The USB2 Controller will use the ports #0 and #1.
+
+This is to document the DT parameters to be passed from the blob in that case.
+
+Required properties:
+- compatible : should be "st,stih407-usb2-phy"
+- reg : contain the offset and length of the system configuration registers
+ used as glue logic to control & parameter phy
+- reg-names : the names of the system configuration registers in "reg", should be "param" and "reg"
+- st,syscfg : sysconfig register to manage phy parameter at driver level
+- resets : list of phandle and reset specifier pairs. There should be two entries, one
+ for the whole phy and one for the port
+- reset-names : list of reset signal names. Should be "global" and "port"
+See: Documentation/devicetree/bindings/reset/st,sti-powerdown.txt
+See: Documentation/devicetree/bindings/reset/reset.txt
+
+Example:
+
+usb2_picophy0: usbpicophy@0 {
+ compatible = "st,stih407-usb2-phy";
+ reg = <0xf8 0x04>, /* syscfg 5062 */
+ <0xf4 0x04>; /* syscfg 5061 */
+ reg-names = "param",
+ "ctrl";
+ #phy-cells = <0>;
+ st,syscfg = <&syscfg_core>;
+ resets = <&softreset STIH407_PICOPHY_SOFTRESET>,
+ <&picophyreset STIH407_PICOPHY0_RESET>;
+ reset-names = "global",
+ "port";
+};
--
1.9.1
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