Re: [RFC PATCH net-next 1/9] dt-bindings: net: dsa: convert ksz bindings document to yaml

Kurt Kanzenbach
2020-10-21T06:52:15Z

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On Mon Oct 19 2020, Christian Eggers wrote:
> Convert the bindings document for Microchip KSZ Series Ethernet switches
> from txt to yaml.

A few comments/questions below.

> diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> new file mode 100644
> index 000000000000..f93c3bdd0b83
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml

Currently the bindings don't have the company names in front of it.

> @@ -0,0 +1,147 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/dsa/microchip,ksz.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip KSZ Series Ethernet switches
> +
> +maintainers:
> + - Marek Vasut <marex@denx.de>
> + - Woojung Huh <Woojung.Huh@microchip.com>
> +
> +properties:
> + # See Documentation/devicetree/bindings/net/dsa/dsa.yaml for a list of additional
> + # required and optional properties.

Don't you need to reference the dsa.yaml binding somehow?

> + compatible:
> + enum:
> + - "microchip,ksz8765"
> + - "microchip,ksz8794"
> + - "microchip,ksz8795"
> + - "microchip,ksz9477"
> + - "microchip,ksz9897"
> + - "microchip,ksz9896"
> + - "microchip,ksz9567"
> + - "microchip,ksz8565"
> + - "microchip,ksz9893"
> + - "microchip,ksz9563"
> + - "microchip,ksz8563"
> +
> + reset-gpios:
> + description:
> + Should be a gpio specifier for a reset line.
> + maxItems: 1
> +
> + microchip,synclko-125:
> + $ref: /schemas/types.yaml#/definitions/flag
> + description:
> + Set if the output SYNCLKO frequency should be set to 125MHz instead of 25MHz.
> +
> +required:
> + - compatible
> + - reg
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + // Ethernet switch connected via SPI to the host, CPU port wired to eth0:
> + eth0 {
> + fixed-link {
> + speed = <1000>;
> + full-duplex;
> + };
> + };
> +
> + spi0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + pinctrl-0 = <&pinctrl_spi_ksz>;
> + cs-gpios = <&pioC 25 0>;
> + id = <1>;
> +
> + ksz9477: ksz9477@0 {

The node names should be switch. See dsa.yaml.

> + compatible = "microchip,ksz9477";
> + reg = <0>;
> + reset-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
> +
> + spi-max-frequency = <44000000>;
> + spi-cpha;
> + spi-cpol;
> +
> + ports {

ethernet-ports are preferred.

Thanks,
Kurt

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