On Wed, Jan 30, 2019 at 04:50:21PM +0100, Paul Kocialkowski wrote:
> Introduce the device-tree bindings for this ULPI USB PHY.
> Optional bindings that are not prefixed with the vendor may be
> relevant to other ULPI USB PHYs since they match generic ULPI
> registers.
>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> ---
> .../devicetree/bindings/phy/smsc-usb333x.txt | 50 +++++++++++++++++++
> 1 file changed, 50 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/phy/smsc-usb333x.txt
>
> diff --git a/Documentation/devicetree/bindings/phy/smsc-usb333x.txt b/Documentation/devicetree/bindings/phy/smsc-usb333x.txt
> new file mode 100644
> index 000000000000..50d500d67b2f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/smsc-usb333x.txt
> @@ -0,0 +1,50 @@
> +Device tree bindings for SMSC USB333x ULPI USB PHY
> +
> +Required properties:
> +- compatible: Should be "smsc,usb333x".
> +
> +Optional properties:
> +- reset-gpios: GPIO to reset the PHY.
> +- clocks: Reference clock that feeds the PHY's PLL.
> +- clock-names: Should be "refclk" for the reference clock.
> +- extvbus-passthru: Enable EXTVBUS signal pass-through to assert the VbusValid
> + signal internally. This is useful when no VBUS line is connected to the PHY.
> +- auto-resume: Enable automatic transmission resume (in host mode).
> +- chrg-vbus: Enable internal VBUS pull-up to 3.3 V during OTG SRP.
> +- dischrg-vbus: Enable internal VBUS pull-down during OTG SRP.
> +- id-pull-up: Enable internal ID pull-up tp 3.3 V.
These all need smsc prefix.
> +- smsc,varisense: Squelch detector threshold register field value, as described
> + in the datasheet.
> +- smsc,phyboost: Output voltage change register field value, as described in the
> + datasheet.
Please give a range of values at least so we can write constraints.
> +
> +Refer to phy/phy-bindings.txt for the generic PHY binding properties.
> +Refer to usb/ulpi.txt for the parent ULPI bus binding required for this PHY.
> +
> +Example:
> +
> +&usb0 {
> + compatible = "xlnx,zynq-usb-2.20a", "chipidea,usb2";
> + clocks = <&clkc 28>;
> + interrupt-parent = <&intc>;
> + interrupts = <0 21 4>;
> + reg = <0xe0002000 0x1000>;
> + dr_mode = "peripheral";
> + phys = <&usb_phy0>;
> + phy-names = "usb-phy";
> + phy_type = "ulpi";
> +
> + ulpi {
> + usb_phy0: usb-phy0 {
> + #phy-cells = <0>;
> + compatible = "smsc,usb333x";
> + reset-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
> + clocks = <&usb_phy_clk>;
> + clock-names = "refclk";
> + smsc,varisense = <1>;
> + smsc,phyboost = <5>;
> + extvbus-passthru;
> + chrg-vbus;
> + };
> + };
> +};
> --
> 2.20.1
>
