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SubjectRe: [PATCH v7 2/5] dt-bindings: Add a binding for Mediatek xHCI host controller
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On 09/08/2015 01:18 AM, Chunfeng Yun wrote:
> add a DT binding documentation of xHCI host controller for the
> MT8173 SoC from Mediatek.
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> .../devicetree/bindings/usb/mt8173-xhci.txt | 52 ++++++++++++++++++++++
> 1 file changed, 52 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/usb/mt8173-xhci.txt
>
> diff --git a/Documentation/devicetree/bindings/usb/mt8173-xhci.txt b/Documentation/devicetree/bindings/usb/mt8173-xhci.txt
> new file mode 100644
> index 0000000..d851bf1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/mt8173-xhci.txt
> @@ -0,0 +1,52 @@
> +MT8173 xHCI
> +
> +The device node for Mediatek SOC USB3.0 host controller
> +
> +Required properties:
> + - compatible : should contain "mediatek,mt8173-xhci"
> + - reg : specifies physical base address and size of the registers,
> + the first one for MAC, the second for IPPC
> + - interrupts : interrupt used by the controller
> + - power-domains : a phandle to USB power domain node to control USB's
> + mtcmos
> + - vusb33-supply : regulator of USB avdd3.3v
> +
> + - clocks : a list of phandle + clock-specifier pairs, one for each
> + entry in clock-names
> + - clock-names : must contain
> + "sys_ck": for clock of xHCI MAC
> + "wakeup_deb_p0": for USB wakeup debounce clock of port0
> + "wakeup_deb_p0": for USB wakeup debounce clock of port1
> +
> + - phys : a list of phandle + phy specifier pairs
> + - usb3-lpm-capable : supports USB3.0 LPM
> + - mediatek,syscon-wakeup : phandle to syscon used to access USB wakeup
> + control register

Wake-up should probably be done in some generic way. That said, I don't
have a specific suggestion other than make it optional.

> + - mediatek,wakeup-src : 1: ip sleep wakeup mode; 2: line state wakeup
> + mode; Others means don't enable wakeup source of USB

This should be optional rather than any other value meaning disabled.

> +
> +Optional properties:
> + - vbus-supply : reference to the VBUS regulator;
> +
> +Example:
> +usb30: usb@11270000 {
> + compatible = "mediatek,mt8173-xhci";
> + reg = <0 0x11270000 0 0x1000>,
> + <0 0x11280700 0 0x0100>;
> + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
> + power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
> + clocks = <&topckgen CLK_TOP_USB30_SEL>,
> + <&pericfg CLK_PERI_USB0>,
> + <&pericfg CLK_PERI_USB1>;
> + clock-names = "sys_ck",
> + "wakeup_deb_p0",
> + "wakeup_deb_p1";
> + phys = <&phy_port0 PHY_TYPE_USB3>,
> + <&phy_port1 PHY_TYPE_USB2>;
> + vusb33-supply = <&mt6397_vusb_reg>;
> + vbus-supply = <&usb_p1_vbus>;
> + usb3-lpm-capable;
> + mediatek,syscon-wakeup = <&pericfg>;
> + mediatek,wakeup-src = <1>;
> + status = "okay";
> +};
>



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