[PATCH 1/4] dt-bindings: usb: musb: Add support for MediaTek musb controller

[<min.guo@mediatek.com>]

From: Min Guo <min.guo@mediatek.com>

This adds support for MediaTek musb controller in
host, peripheral and otg mode

Signed-off-by: Min Guo <min.guo@mediatek.com>
---
 .../devicetree/bindings/usb/mediatek,musb.txt      | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/mediatek,musb.txt

diff --git a/Documentation/devicetree/bindings/usb/mediatek,musb.txt b/Documentation/devicetree/bindings/usb/mediatek,musb.txt
new file mode 100644
index 0000000..e899c9b
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/mediatek,musb.txt
@@ -0,0 +1,49 @@
+MediaTek musb DRC/OTG controller
+-------------------------------------------
+
+Required properties:
+ - compatible      : should be "mediatek,<soc-model>-musb",
+   "mediatek,mtk-musb", soc-model is the name of SoC, such as
+   mt2701, when using "mediatek,mtk-musb" compatible string, you
+   need SoC specific ones in addition, one of:
+   - "mediatek,mt2701-musb"
+ - reg             : specifies physical base address and size of
+   the registers
+ - interrupts      : interrupt used by musb controller
+ - interrupt-names : must be "mc"
+ - phys            : PHY specifier for the OTG phy
+ - phy-names       : should be "usb2-phy"
+ - dr_mode         : should be one of "host", "peripheral" or "otg",
+   refer to usb/generic.txt
+ - clocks          : a list of phandle + clock-specifier pairs, one for
+   each entry in clock-names
+ - clock-names     : must contain "main","mcu","univpll"
+   for clocks of controller
+
+Optional properties:
+ - extcon : external connector for VBUS and IDPIN changes detection,
+   needed when supports dual-role mode.
+ - vbus-supply : reference to the VBUS regulator, needed when supports
+   dual-role mode.
+ - power-domains   : a phandle to USB power domain node to control USB's
+   MTCMOS
+
+Example:
+
+usb2: usb@11200000 {
+	compatible = "mediatek,mt2701-musb";
+		"mediatek,mtk-musb";
+	reg = <0 0x11200000 0 0x1000>;
+	interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;
+	interrupt-names = "mc";
+	phys = <&u2port2 PHY_TYPE_USB2>;
+	phy-names = "usb2-phy";
+	vbus-supply = <&usb_vbus>;
+	extcon = <&extcon_usb>;
+	dr_mode = "otg";
+	clocks = <&pericfg CLK_PERI_USB0>,
+		 <&pericfg CLK_PERI_USB0_MCU>,
+		 <&pericfg CLK_PERI_USB_SLV>;
+	clock-names = "main","mcu","univpll";
+	power-domains = <&scpsys MT2701_POWER_DOMAIN_IFR_MSC>;
+};
-- 
1.9.1