add a DT binding documentation of usb3.0 phy for MT65xx
SoCs from Mediatek.
Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
---
.../devicetree/bindings/usb/mt65xx-u3phy.txt | 34 ++++++++++++++++++++++
1 file changed, 34 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/mt65xx-u3phy.txt
diff --git a/Documentation/devicetree/bindings/usb/mt65xx-u3phy.txt b/Documentation/devicetree/bindings/usb/mt65xx-u3phy.txt
new file mode 100644
index 0000000..056b2aa
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/mt65xx-u3phy.txt
@@ -0,0 +1,34 @@
+MT65xx U3PHY
+
+The device node for Mediatek SOC usb3.0 phy
+
+Required properties:
+ - compatible : Should be "mediatek,mt8173-u3phy"
+ - reg : Offset and length of registers, the first is for mac domain,
+ another for phy domain
+ - power-domains: to enable usb's mtcmos
+ - usb-wakeup-ctrl : to access usb wakeup control register
+ - wakeup-src : 1: ip sleep wakeup mode; 2: line state wakeup mode; others
+ means don't enable wakeup source of usb
+ - u2port-num : number of usb2.0 ports to support which should be 1 or 2
+ - clocks : must support all clocks that phy need
+ - clock-names: should be "wakeup_deb_p0", "wakeup_deb_p1" for wakeup
+ debounce control clocks, and "u3phya_ref" for u3phya reference clock.
+
+Example:
+
+u3phy: usb-phy@11271000 {
+ compatible = "mediatek,mt8173-u3phy";
+ reg = <0 0x11271000 0 0x3000>,
+ <0 0x11280000 0 0x20000>;
+ power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
+ usb-wakeup-ctrl = <&pericfg>;
+ wakeup-src = <1>;
+ u2port-num = <2>;
+ clocks = <&perisys PERI_USB0>,
+ <&perisys PERI_USB1>,
+ <&apmixedsys CLK_APMIXED_REF2USB_TX>;
+ clock-names = "wakeup_deb_p0",
+ "wakeup_deb_p1",
+ "u3phya_ref";
+};
--
1.8.1.1.dirty
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