Re: [PATCH 1/3] dt-bindings: usb: add support for dwc3 controller on Amlogic Meson GX

[Rob Herring]

On Sun, Jan 28, 2018 at 09:03:31PM +0100, Martin Blumenstingl wrote:
> Amlogic Meson GX SoCs (GXL and AXG) come with a (host-only) dwc3 USB
> controller. This requires a clock to be enabled and a reset line to be
> pulsed to get the hardware into a known state.
> Add the documentation for this IP block, similar to "qcom,dwc3.txt".
> 
> Signed-off-by: Martin Blumenstingl 
> ---
>  .../devicetree/bindings/usb/amlogic,dwc3.txt   | 42 
> ++
>  1 file changed, 42 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/amlogic,dwc3.txt

Reviewed-by: Rob Herring 

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[PATCH 1/3] dt-bindings: usb: add support for dwc3 controller on Amlogic Meson GX

[Martin Blumenstingl]

Amlogic Meson GX SoCs (GXL and AXG) come with a (host-only) dwc3 USB
controller. This requires a clock to be enabled and a reset line to be
pulsed to get the hardware into a known state.
Add the documentation for this IP block, similar to "qcom,dwc3.txt".

Signed-off-by: Martin Blumenstingl 
---
 .../devicetree/bindings/usb/amlogic,dwc3.txt   | 42 ++
 1 file changed, 42 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/amlogic,dwc3.txt

diff --git a/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt 
b/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
new file mode 100644
index ..9a8b631904fd
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
@@ -0,0 +1,42 @@
+Amlogic Meson GX DWC3 USB SoC controller
+
+Required properties:
+- compatible:  depending on the SoC this should contain one of:
+   * amlogic,meson-axg-dwc3
+   * amlogic,meson-gxl-dwc3
+- clocks:  a handle for the "USB general" clock
+- clock-names: must be "usb_general"
+- resets:  a handle for the shared "USB OTG" reset line
+- reset-names: must be "usb_otg"
+
+Required child node:
+A child node must exist to represent the core DWC3 IP block. The name of
+the node is not important. The content of the node is defined in dwc3.txt.
+
+PHY documentation is provided in the following places:
+- Documentation/devicetree/bindings/phy/meson-gxl-usb2-phy.txt
+- Documentation/devicetree/bindings/phy/meson-gxl-usb3-phy.txt
+
+Example device nodes:
+   usb0: usb@ff50 {
+   compatible = "amlogic,meson-axg-dwc3";
+   #address-cells = <2>;
+   #size-cells = <2>;
+   ranges;
+
+   clocks = < CLKID_USB>;
+   clock-names = "usb_general";
+   resets = < RESET_USB_OTG>;
+   reset-names = "usb_otg";
+
+   dwc3: dwc3@ff50 {
+   compatible = "snps,dwc3";
+   reg = <0x0 0xff50 0x0 0x10>;
+   interrupts = ;
+   dr_mode = "host";
+   maximum-speed = "high-speed";
+   snps,dis_u2_susphy_quirk;
+   phys = <_phy>, <_phy0>;
+   phy-names = "usb2-phy", "usb3-phy";
+   };
+   };
-- 
2.16.1

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