[PATCH v9 2/5] dt-bindings: phy: Add documentation for Airoha AN7581 USB PHY

[Krzysztof Kozlowski]

On Thu, May 21, 2026 at 05:35:53PM +0200, Christian Marangi wrote:
> Add documentation for Airoha AN7581 USB PHY that describe the USB PHY
> for the USB controller.
> 
> Airoha AN7581 SoC support a maximum of 2 USB port. The USB 2.0 mode is
> always supported. The USB 3.0 mode is optional and depends on the Serdes
> mode currently configured on the system for the relevant USB port.
> 
> To correctly calibrate, the USB 2.0 port require correct value in
> "airoha,usb2-monitor-clk-sel" property. Both the 2 USB 2.0 port permit
> selecting one of the 4 monitor clock for calibration (internal clock not
> exposed to the system) but each port have only one of the 4 actually
> connected in HW hence the correct value needs to be specified in DT
> based on board and the physical port. Normally it's monitor clock 1 for
> USB1 and monitor clock 2 for USB2.
> 
> To correctly setup the Serdes mode attached to the USB 3.0 mode, a phys
> property is required with the phandle pointing to the correct Serdes port
> provided by the SCU node. Providing the phys property is optional if USB
> 3.0 is not used.
> 
> Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
> ---
>  .../bindings/phy/airoha,an7581-usb-phy.yaml   | 62 +++++++++++++++++++
>  MAINTAINERS                                   |  6 ++
>  2 files changed, 68 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/airoha,an7581-usb-phy.yaml

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski at oss.qualcomm.com>

Best regards,
Krzysztof