linux-kernel - Re: [PATCH] dt-bindings: bus: add palmbus device tree bindings

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Date:   Sat, 16 Oct 2021 09:24:59 -0500
From:   Rob Herring <robh@...nel.org>
To:     Sergio Paracuellos <sergio.paracuellos@...il.com>
Cc:     devicetree@...r.kernel.org, john@...ozen.org, neil@...wn.name,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: bus: add palmbus device tree bindings

On Fri, Oct 15, 2021 at 09:17:41PM +0200, Sergio Paracuellos wrote:
> Add device tree bindings for palmbus controller present in all the MIPS
> ralink based SoCs.
> 
> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.com>
> ---
>  .../devicetree/bindings/bus/palmbus.yaml      | 81 +++++++++++++++++++
>  1 file changed, 81 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/bus/palmbus.yaml
> 
> diff --git a/Documentation/devicetree/bindings/bus/palmbus.yaml b/Documentation/devicetree/bindings/bus/palmbus.yaml
> new file mode 100644
> index 000000000000..d5159a4f3cf8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/bus/palmbus.yaml
> @@ -0,0 +1,81 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/bus/palmbus.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Ralink PalmBus Device Tree Bindings
> +
> +maintainers:
> +  - Sergio Paracuellos <sergio.paracuellos@...il.com>
> +
> +description: |
> +  The ralink palmbus controller can be found in all ralink MIPS
> +  SoCs. It provides an external bus for connecting multiple
> +  external devices to the SoC.
> +
> +properties:
> +  $nodename:
> +    pattern: "^palmbus(@[0-9a-f]+)?$"
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 1
> +
> +  compatible:
> +    const: palmbus
> +
> +  reg:
> +    maxItems: 1
> +
> +  ranges: true
> +
> +patternProperties:
> +  # All other properties should be child nodes with unit-address and 'reg'
> +  "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-fA-F]+$":

The node name pattern is already checked elsewhere. You only need to 
define the unit-address part which should be lowercase hex. So just:

'@[0-9a-f]+$'

> +    type: object
> +    properties:
> +      reg:
> +        maxItems: 1
> +
> +    required:
> +      - reg
> +
> +required:
> +  - compatible
> +  - reg
> +  - "#address-cells"
> +  - "#size-cells"
> +  - ranges
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    palmbus@...00000 {
> +        compatible = "palmbus";
> +        reg = <0x1e000000 0x100000>
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        ranges = <0x0 0x1e000000 0x0fffff>;
> +
> +        syscon@0 {
> +            compatible = "mediatek,mt7621-sysc", "syscon";
> +            reg = <0x0 0x100>;
> +            #clock-cells = <1>;
> +            #reset-cells = <1>;
> +            ralink,memctl = <&memc>;
> +            clock-output-names = "xtal", "cpu", "bus",
> +                                 "50m", "125m", "150m",
> +                                 "250m", "270m";
> +        };
> +
> +        wdt@100 {
> +            compatible = "mediatek,mt7621-wdt";
> +            reg = <0x100 0x100>;
> +        };
> +    };
> +
> +...
> -- 
> 2.33.0
> 
>