On Wed, Jul 30, 2014 at 04:28:10PM +0100, Peter Griffin wrote:
> This patch documents the device tree documentation required for
> the ST usb3 controller glue layer found in STiH407 devices.
>
> Signed-off-by: Giuseppe Cavallaro <peppe.cavall...@st.com>
> Signed-off-by: Peter Griffin <peter.grif...@linaro.org>
> Acked-by: Lee Jones <lee.jo...@linaro.org>
> ---
> Documentation/devicetree/bindings/usb/dwc3-st.txt | 69
> +++++++++++++++++++++++
> 1 file changed, 69 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/usb/dwc3-st.txt
>
> diff --git a/Documentation/devicetree/bindings/usb/dwc3-st.txt
> b/Documentation/devicetree/bindings/usb/dwc3-st.txt
> new file mode 100644
> index 0000000..de3fea3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/dwc3-st.txt
> @@ -0,0 +1,69 @@
> +ST DWC3 glue logic
> +
> +This file documents the parameters for the dwc3-st driver.
> +This driver controls the glue logic used to configure the dwc3 core on
> +STiH407 based platforms.
> +
> +Required properties:
> + - compatible : must be "st,stih407-dwc3"
> + - reg : glue logic base address and USB syscfg ctrl register
> offset
> + - reg-names : should be "reg-glue" and "syscfg-reg"
> + - st,syscon : should be phandle to system configuration node which
> + encompasses the glue registers
> + - resets : list of phandle and reset specifier pairs. There should be
> two entries, one
> + for the powerdown and softreset lines of the usb3 IP
> + - reset-names : list of reset signal names. Names should be
> "powerdown" and "softreset"
> +See: Documentation/devicetree/bindings/reset/st,sti-powerdown.txt
> +See: Documentation/devicetree/bindings/reset/reset.txt
> +
> + - #address-cells, #size-cells : should be '1' if the device has sub-nodes
> + with 'reg' property
> +
> + - pinctl-names : A pinctrl state named "default" must be defined
> +See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
> +
> + - pinctrl-0 : Pin control group
> +See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
> +
> + - ranges : allows valid 1:1 translation between child's address space and
> + parent's address space
> +
> +Sub-nodes:
> +The dwc3 core should be added as subnode to ST DWC3 glue as shown in the
> +example below. The DT binding details of dwc3 can be found in:
> +Documentation/devicetree/bindings/usb/dwc3.txt
> +
> +NB: The dr_mode property described in [1] is NOT optional for this driver,
> as the default value
> +is "otg", which isn't supported by this SoC. Valid dr_mode values for
> dwc3-st are either "host"
> +or "device".
> +
> +[1] Documentation/devicetree/bindings/usb/generic.txt
> +
> +Example:
> +
> +st_dwc3: dwc3@8f94000 {
> + status = "disabled";
> + compatible = "st,stih407-dwc3";
> + reg = <0x08f94000 0x1000>, <0x110 0x4>;
> + reg-names = "reg-glue", "syscfg-reg";
> + st,syscfg = <&syscfg_core>;
> + resets = <&powerdown STIH407_USB3_POWERDOWN>;
> + <&softreset STIH407_MIPHY2_SOFTRESET>;
> + reset-names = "powerdown",
> + "softreset";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_usb3>;
> + ranges;
> +
> + dwc3: dwc3@9900000 {
> + compatible = "snps,dwc3";
> + reg = <0x09900000 0x100000>;
> + interrupts = <GIC_SPI 155 IRQ_TYPE_NONE>;
> + dr_mode = "host"
> + usb-phy = <&usb3_phy>;
> + phy-names = "usb2-phy";
> + phys = <&usb2_picophy2>;
why are you using different binding for usb2 and usb3 phys ? Why can't
you just:
phys-names = "usb2-phy", "usb3-phy";
phys = <&usb2_picophy2>, <&usb3_phy>;
??
--
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