linux-kernel - Re: [PATCH v4 2/3] dt-bindings: remoteproc: Add AVM WASP

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Date:   Tue, 2 Aug 2022 09:25:42 -0600
From:   Rob Herring <robh@...nel.org>
To:     Daniel Kestrel <kestrelseventyfour@...il.com>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/3] dt-bindings: remoteproc: Add AVM WASP

On Sat, Jul 23, 2022 at 09:42:46AM +0200, Daniel Kestrel wrote:
> AVM Fritzbox router boards may contain an additional ATH79
> based SoC that has the wifi cards connected.
> This patch adds bindings for this remote processor.
> 
> Signed-off-by: Daniel Kestrel <kestrelseventyfour@...il.com>
> ---
>  .../bindings/remoteproc/avm,wasp-rproc.yaml   | 61 +++++++++++++++++++
>  1 file changed, 61 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/avm,wasp-rproc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/avm,wasp-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/avm,wasp-rproc.yaml
> new file mode 100644
> index 000000000000..e8618706a34f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/avm,wasp-rproc.yaml
> @@ -0,0 +1,61 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/avm,wasp-rproc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: AVM WASP processor controller bindings
> +
> +maintainers:
> +  - Daniel Kestrel <kestrelseventyfour@...il.com>
> +
> +description: |
> +  This document defines the bindings for the remoteproc component that loads and
> +  boots firmwares on the AVM Wireless Assistant Support Processor (WASP) SoC
> +  that is attached to some AVM Fritzbox devices (3390, 3490, 5490, 5491, 7490).
> +
> +properties:
> +  compatible:
> +    enum:
> +      - avm,fritzbox3390-wasp
> +      - avm,fritzbox3490-wasp
> +      - avm,fritzbox5490-wasp
> +      - avm,fritzbox5491-wasp
> +      - avm,fritzbox7490-wasp
> +
> +  avm,wasp-mdio:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: Lantiq GSWIP switch mdio.

"git grep 'mdio.*=.*<'" gives existing 'mdio-parent-bus', 'mdio-device', 
and 'mdio-handle'. 'mdio-parent-bus' is the only one documented, but is 
for muxes. I'd go with 'mdio-device' here.

> +
> +  avm,wasp-port:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: Network port, where the WASP SoC is connected to.

Maybe something already exists here too.

> +
> +  avm,reset-gpios:
> +    description: Reset gpio of the WASP SoC.
> +    maxItems: 1

Just 'reset-gpios' is fine here as that is somewhat standard.

> +
> +  avm,startup-gpios:
> +    description: Startup gpio of the WASP SoC.

s/gpio/GPIO/

Perhaps some detail on what it does besides just 'startup'.

> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - avm,wasp-mdio
> +  - avm,wasp-port
> +  - avm,reset-gpios
> +  - avm,startup-gpios
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    remoteproc {
> +        compatible = "avm,fritzbox7490-wasp";
> +        avm,wasp-mdio = <&gswip_mdio>;
> +        avm,wasp-port = <&port5>;
> +        avm,reset-gpios = <&gpio 34 GPIO_ACTIVE_HIGH>;
> +        avm,startup-gpios = <&gpio 5 GPIO_ACTIVE_HIGH>;
> +    };
> -- 
> 2.17.1
> 
>