On Wed, Nov 08, 2017 at 01:16:41PM +0530, Raveendra Padasalagi wrote:
> Add devicetree binding document for broadcom's
> Cygnus SoC specific usb phy controller driver.
>
> Signed-off-by: Raveendra Padasalagi <[email protected]>
> ---
> .../bindings/phy/brcm,cygnus-usb-phy.txt | 106
> +++++++++++++++++++++
> 1 file changed, 106 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/phy/brcm,cygnus-usb-phy.txt
>
> diff --git a/Documentation/devicetree/bindings/phy/brcm,cygnus-usb-phy.txt
> b/Documentation/devicetree/bindings/phy/brcm,cygnus-usb-phy.txt
> new file mode 100644
> index 0000000..bbc4b94
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/brcm,cygnus-usb-phy.txt
> @@ -0,0 +1,106 @@
> +BROADCOM CYGNUS USB PHY
> +
> +Required Properties:
> +- compatible: brcm,cygnus-usb-phy
> +- reg : the register start address and length for
> + crmu_usbphy_aon_ctrl,
> + cdru usb phy control,
> + usb host idm registers,
> + usb device idm registers.
> +- reg-names: a list of the names corresponding to the previous register
> ranges
> + Should contain
> + "crmu-usbphy-aon-ctrl",
> + "cdru-usbphy",
> + "usb2h-idm",
> + "usb2d-idm".
> +- address-cells: should be 1
> +- size-cells: should be 0
> +
> +Sub-nodes:
> + Each port's PHY should be represented as a sub-node.
> +
> +Sub-nodes required properties:
> +- reg: the PHY number
> +- #phy-cells must be 1
> + The node that uses the phy must provide 1 integer argument specifying
> + port number.
> +
> +Optional Properties:
> +- vbus-p#-supply : The regulator for vbus out control for the host
Is this a literal # or something else?
> + functionality enabled ports.
> +- vbus-gpios: vbus gpio binding
> + This is mandatory for port 2, as port 2 is used as dual role phy.
> + Based on the vbus and id values device or host role is determined
> + for phy 2.
These optional properties don't match with the example.
> +
> +- extcon: extcon phandle
> + This is mandatory for port 2, as port 2 is used as dual role phy.
> + extcon should be phandle to external usb gpio module which provide
> + device or host role notifications based on the ID and VBUS gpio's state.
> +
> +
> +Refer to phy/phy-bindings.txt for the generic PHY binding properties
> +
> +NOTE: port 0 and port 1 are host only and port 2 is dual role port.
> +
> +Example of phy :
> + usbphy: usb-phy@0301c028 {
> + compatible = "brcm,cygnus-usb-phy";
> + reg = <0x0301c028 0x4>,
> + <0x0301d1b4 0x5c>,
> + <0x18115000 0xa00>,
> + <0x18111000 0xa00>;
> + reg-names = "crmu-usbphy-aon-ctrl", "cdru-usbphy",
> + "usb2h-idm", "usb2d-idm";
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + usbphy0: usb-phy@0 {
> + reg = <0>;
> + #phy-cells = <1>;
> + };
> +
> + usbphy1: usb-phy@1 {
> + reg = <1>;
> + #phy-cells = <1>;
> + };
> +
> + usbphy2: usb-phy@2 {
> + reg = <2>;
> + #phy-cells = <1>;
> + extcon = <&extcon_usb>;
> + };
> + };
> +
> + extcon_usb: extcon_usb {
> + compatible = "linux,extcon-usb-gpio";
> + vbus-gpio = <&gpio_asiu 121 0>;
> + id-gpio = <&gpio_asiu 122 0>;
> + status = "okay";
> + };
> +
> +
> +Example of node using the phy:
> +
> + /* This nodes declares all three ports, port 0
> + and port 1 are host and port 2 is device or host */
> +
> + ehci0: usb@18048000 {
> + compatible = "generic-ehci";
> + reg = <0x18048000 0x100>;
> + interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
> + phys = <&usbphy0 0 &usbphy1 1 &usbphy2 2>;
> + phy-names = "usbp0","usbp1","usbp2";
> + status = "okay";
Don't show status in examples.
> + };
> +
> + /* This node declares port 2 phy
> + and configures it for device */
> +
> + usbd_udc_dwc1: usb@1804c000 {
> + compatible = "iproc-udc";
> + reg = <0x1804c000 0x2000>;
> + interrupts = <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
> + phys = <&usbphy2 2>;
> + phy-names = "usbdrd";
> + };
> --
> 1.9.1
>
