[RFC,1/8] dt-bindings: phy: mediatek,xfi-pextp: add new bindings

Add bindings for the MediaTek PEXTP Ethernet SerDes PHY found in the
MediaTek MT7988 SoC which can operate at various interfaces modes:

 * USXGMII
 * 10GBase-R
 * 5GBase-R
 * 2500Base-X
 * 1000Base-X
 * Cisco SGMII (MAC side)

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 .../bindings/phy/mediatek,xfi-pextp.yaml      | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/mediatek,xfi-pextp.yaml

On Thu, Nov 09, 2023 at 09:50:55PM +0000, Daniel Golle wrote:
> Add bindings for the MediaTek PEXTP Ethernet SerDes PHY found in the
> MediaTek MT7988 SoC which can operate at various interfaces modes:
> 
>  * USXGMII
>  * 10GBase-R
>  * 5GBase-R
>  * 2500Base-X
>  * 1000Base-X
>  * Cisco SGMII (MAC side)
> 
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>
> ---
>  .../bindings/phy/mediatek,xfi-pextp.yaml      | 71 +++++++++++++++++++
>  1 file changed, 71 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/mediatek,xfi-pextp.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,xfi-pextp.yaml b/Documentation/devicetree/bindings/phy/mediatek,xfi-pextp.yaml
> new file mode 100644
> index 0000000000000..948d5031af1e3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/mediatek,xfi-pextp.yaml
> @@ -0,0 +1,71 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/mediatek,xfi-pextp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek XFI PEXTP SerDes PHY
> +
> +maintainers:
> +  - Daniel Golle <daniel@makrotopia.org>
> +
> +description: |

Don't need '|' here.

> +  The MediaTek XFI PEXTP SerDes PHY provides the physical SerDes lanes
> +  used by the MediaTek USXGMII PCS.
> +
> +properties:
> +  $nodename:
> +    pattern: "^phy@[0-9a-f]+$"
> +
> +  compatible:
> +    const: mediatek,mt7988-xfi-pextp
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: XFI PHY clock
> +
> +  resets:
> +    items:
> +      - description: PEXTP reset
> +
> +  mediatek,usxgmii-performance-errata:
> +    $ref: /schemas/types.yaml#/definitions/flag
> +    description:
> +      USXGMII0 on MT7988 suffers from a performance problem in 10GBase-R
> +      mode which needs a work-around in the driver. The work-around is
> +      enabled using this flag.
> +
> +  "#phy-cells":
> +    const: 0
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - resets
> +  - "#phy-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mediatek,mt7988-clk.h>
> +    #include <dt-bindings/reset/mediatek,mt7988-resets.h>
> +    soc {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +
> +      xfi_pextp0: phy@11f20000 {

Drop unused labels.

> +        compatible = "mediatek,mt7988-xfi-pextp";
> +        reg = <0 0x11f20000 0 0x10000>;
> +        clocks = <&topckgen CLK_TOP_XFI_PHY_0_XTAL_SEL>;
> +        resets = <&watchdog MT7988_TOPRGU_XFI_PEXTP0_GRST>;
> +        mediatek,usxgmii-performance-errata;
> +        #phy-cells = <0>;
> +      };
> +    };
> +
> +...
> -- 
> 2.42.1