On Thu, Apr 07, 2016 at 06:02:59PM +0530, Purna Chandra Mandal wrote:
> Document devicetree binding for the USB controller
> and USB Phy found on Microchip PIC32 class devices.
>
> Signed-off-by: Purna Chandra Mandal <purna.mandal@xxxxxxxxxxxxx>
>
> ---
>
> Changes in v2: None
>
> .../bindings/usb/microchip,pic32-musb.txt | 67 ++++++++++++++++++++++
> 1 file changed, 67 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/usb/microchip,pic32-musb.txt
>
> diff --git a/Documentation/devicetree/bindings/usb/microchip,pic32-musb.txt b/Documentation/devicetree/bindings/usb/microchip,pic32-musb.txt
> new file mode 100644
> index 0000000..e1cec9d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/microchip,pic32-musb.txt
> @@ -0,0 +1,67 @@
> +Microchip PIC32 MUSB DRC/OTG controller
> +-------------------------------------------
> +
> +Required properties:
> + - compatible : should be "microchip,pic32mzda-usb".
> + - reg : offset and length of "MUSB Core Registers" and
> + "USB Clock & Reset Registers".
> + - reg-names : should be "mc", and "usbcr" in order
> + - clocks : clock specifier for the musb controller clock
> + - clock-names : should be "usb_clk"
> + - interrupts : interrupt number for MUSB Core General interrupt
> + and DMA interrupt
> + - interrupt-names : must be "mc" and "dma" in order.
> + - phys : phy specifier for the otg phy.
> + - dr_mode : should be one of "host", "peripheral" or "otg".
> + - mentor,multipoint: Should be "1" indicating the musb controller supports
> + multipoint. This is MUSB configuration-specific setting.
> + - mentor,num-eps : Specifies the number of endpoints. This is also a
> + MUSB configuration-specific setting. Should be set to "8".
> + - mentor,ram-bits : Specifies the ram address size. Should be set to "11".
> + - mentor,power : Should be "500". This signifies the controller can supply
> + up to 500mA when operating in host mode.
> + - phys : phandle of the USB phy.
> + - usb_overcurrent : phandle to MUSB over-current note. It should have
> + interrupt number for over-current detection logic.
This node is only an interrupt? Then you should use interrupts-extended
and make this interrupt the 3rd one. interrupts-extended will let you
have different interrupt parents for each irq.
> +
> +Optional properties:
> + - microchip,fifo-mode: Specifies layout of internal SRAM for end-point fifos.
> + Should be 0 (default) or 1.
Make this a boolean.
> +
> +Example:
> + aliases {
> + usb1 = &usb1;
> + phy1 = &usb1_phy;
> + };
> +
> + usb1: hsusb1_core@1f8e3000 {
> + compatible = "microchip,pic32mzda-usb";
> + reg = <0x1f8e3000 0x1000>,
> + <0x1f884000 0x1000>;
> + reg-names = "mc", "usbcr";
> + interrupts = <132 IRQ_TYPE_EDGE_RISING>,
> + <133 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "mc", "dma";
> + dr_mode = "host";
> + mentor,multipoint = <1>;
> + mentor,num-eps = <8>;
> + mentor,ram-bits = <11>;
> + mentor,power = <500>;
> + phys = <&usb1_phy>;
> + clocks = <&rootclk PB5CLK>;
> + clock-names = "usb_clk";
> + usb_overcurrent = <&usb1_overcurrent>;
> + };
> +
> + usb1_phy: hsusb1_phy@1f8e4000 {
> + compatible = "usb-nop-xceiv";
> + reg = <0x1f8e4000 0x1000>;
> + clocks = <&rootclk UPLLCLK>;
> + clock-names = "main_clk";
> + clock-frequency = <24000000>;
> + };
> +
> + usb1_overcurrent: hsusb1_oc@0 {
> + interrupt-parent = <&gpio1>;
> + interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
> + };
> --
> 1.8.3.1
>
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