linux-kernel - Re: [PATCH V5] dt-bindings: soc: imx: Add binding doc for spba bus

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Date:   Thu, 26 Nov 2020 07:50:30 -0600
From:   Adam Ford <aford173@...il.com>
To:     devicetree <devicetree@...r.kernel.org>
Cc:     Adam Ford-BE <aford@...conembedded.com>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V5] dt-bindings: soc: imx: Add binding doc for spba bus

On Wed, Nov 18, 2020 at 5:04 PM Adam Ford <aford173@...il.com> wrote:
>
> Add binding doc for fsl,spba-bus.
>
> Signed-off-by: Adam Ford <aford173@...il.com>

Rob,

Sorry to be a pest.  I have a series for the i.MX8M Nano that's
waiting on this.  Have you had time to review my latest attempt?

adam
> ---
> make dt_binding_check -j8 |grep spba
>   DTEX    Documentation/devicetree/bindings/bus/fsl,spba-bus.example.dts
>   DTC     Documentation/devicetree/bindings/bus/fsl,spba-bus.example.dt.yaml
>   CHECK   Documentation/devicetree/bindings/bus/fsl,spba-bus.example.dt.yaml
>
> V5:  Rebase on 5.10-rc2 to be able to check yaml
>      Add Reg entry
>
> V4:  Remove an accidental makefile change
>      Move type:object under additional properties
>
> V3:  Rebase sample from aips-bus example
>      Split off from series adding i.MX8M Nano functions to reduce noise
>
> V2:  Attempted to update yaml from feedback
>
> diff --git a/Documentation/devicetree/bindings/bus/fsl,spba-bus.yaml b/Documentation/devicetree/bindings/bus/fsl,spba-bus.yaml
> new file mode 100644
> index 000000000000..e9f77ecae3d3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/bus/fsl,spba-bus.yaml
> @@ -0,0 +1,68 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/bus/fsl,spba-bus.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Shared Peripherals Bus Interface
> +
> +maintainers:
> +  - Shawn Guo <shawnguo@...nel.org>
> +
> +description: |
> +  A simple bus enabling access to shared peripherals.
> +
> +  The "spba-bus" follows the "simple-bus" set of properties, as
> +  specified in the Devicetree Specification.  It is an extension of
> +  "simple-bus" because the SDMA controller uses this compatible flag to
> +  determine which peripherals are available to it and the range over which
> +  the SDMA can access.  There are no special clocks for the bus, because
> +  the SDMA controller itself has its interrupt, and clock assignments.
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        const: fsl,spba-bus
> +  required:
> +    - compatible
> +
> +properties:
> +  $nodename:
> +    pattern: "^bus(@[0-9a-f]+)?$"
> +
> +  compatible:
> +    items:
> +      - const: fsl,spba-bus
> +      - const: simple-bus
> +
> +  '#address-cells':
> +    enum: [ 1, 2 ]
> +
> +  '#size-cells':
> +    enum: [ 1, 2 ]
> +
> +  reg:
> +    maxItems: 1
> +
> +  ranges: true
> +
> +required:
> +  - compatible
> +  - '#address-cells'
> +  - '#size-cells'
> +  - reg
> +  - ranges
> +
> +additionalProperties:
> +  type: object
> +
> +examples:
> +  - |
> +    bus@...00000 {
> +        compatible = "fsl,spba-bus", "simple-bus";
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        reg = <0x30000000 0x100000>;
> +        ranges;
> +    };
> --
> 2.25.1
>