On 07/02/2013 10:26 AM, Felipe Balbi wrote:
> alright, how about this ? I'll split dr_mode documentation to a
> separate patch soon and resend with devicetree-discuss in the
> loop.
Okay.
> diff --git a/Documentation/devicetree/bindings/usb/generic.txt
> b/Documentation/devicetree/bindings/usb/generic.txt new file mode
> 100644 index 0000000..623e360 --- /dev/null +++
> b/Documentation/devicetree/bindings/usb/generic.txt @@ -0,0 +1,25
> @@ +Generic USB Properties + +Optional properties: + -
> maximum-speed: tells USB controllers we want to work up to a
> certain + speed. Valid arguments are "super-speed",
> "high-speed", + "full-speed" and "low-speed". In case
> this isn't
> passed + via DT, USB controllers should default to their
> maximum
> + HW capability. + - dr_mode: tells Dual-Role USB
> controllers
> that we want to work on a + particular mode. Valid
> arguments are
> "host", + "peripheral" and "otg". In case this attribute
> isn't +
> passed via DT, USB DRD controllers should default to +
> OTG. +
> +This is an attribute to a USB controller such as: + +dwc3@4a030000
> { + compatible = "synopsys,dwc3"; + reg = <0x4a030000 0xcfff>; +
> interrupts = <0 92 4> + usb-phy = <&usb2_phy>, <&usb3,phy>;
Two things:
- we seem to use usb-phy and phys. Couldn't we just stick to one?
- usb-phy is optional, isn't it?
> + tx-fifo-resize;
this one is dwc3 specific right? The other two (max speed & dr_mode)
look generic enough.
> + maximum-speed = "super-speed"; + dr_mode = "otg"; +};
Sebastian
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