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SubjectRe: [PATCH v1 1/2] dt-binding: usb: ci-hdrc-usb2: document Nuvoton NPCM supprt
On Tue, 19 Sept 2023 at 15:39, Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 19/09/2023 07:14, Tomer Maimon wrote:
> >>> - nvidia,tegra20-ehci
> >>> - nvidia,tegra20-udc
> >>> - nvidia,tegra30-ehci
> >>> @@ -325,6 +326,20 @@ properties:
> >>> type: boolean
> >>> deprecated: true
> >>>
> >>> + nuvoton,sysgcr:
> >>> + $ref: /schemas/types.yaml#/definitions/phandle-array
> >>> + items:
> >>> + - items:
> >>> + - description: phandle to syscon that configures usb phy mux.
> >>> + - description: offset of usb phy mux selection.
> >>> + - description: mask usb phy mux selection.
> >>> + - description: value usb phy mux selection.
> >>> + description:
> >>> + A phandle to syscon with three arguments that configure usb phy mux.
> >>> + The argument one is the offset of usb phy mux selection, the argument two
> >>> + is the mask usb phy mux selection, the argument three is the mask usb phy
> >>> + mux selection.
> >>
> >> Sorry, you miss phy driver. Don't use syscon instead of proper hardware
> >> devices.
> > Sorry the role of nuvoton,sysgcr property is to handle a mux between
> > the different devices and not the handle the phy itself, handle the
> > mux done in the GCR.
> > Should we move the nuvoton,sysgcr description to another place in the
> > ci-hdrc-usb2.yaml
> > or
> > Should we use a different driver to handle the mux and call it from
> > the ci-hdrc-npcm driver, If yes which driver should we use?
>
> What is an "usb phy mux"?
We have USB phy that could be connected to USB host (different driver)
or it can be connected to the UDC driver(ChipIdea)
> Best regards,
> Krzysztof
>

Best regards,

Tomer

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