[PATCH V6 1/2] dt-bindings: soc: imx: Add binding doc for spba bus

[Adam Ford]

On Thu, Dec 2, 2021 at 8:38 AM Adam Ford <aford173 at gmail.com> wrote:
>
> Add binding doc for fsl,spba-bus.
>

Rob / Shawn,

Any feedback on this series?  I am not very good with YAML, but my
intent was to name the bus 'spba-bus' and the second patch in the
series was designed to go through all the SoC device trees and update
them to reflect this name to remove a bunch of the splat generated
when building various imx boards.

thanks

adam

> Signed-off-by: Adam Ford <aford173 at gmail.com>
> ---
> V6:  Rebase on 5.16-rc and rename spba at xxxx to spba-bus at xxxx since
>      most dsti files use that naming convention.
>
> 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..d42dbb0bbc2e
> --- /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 at kernel.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:
> +  $nodename:
> +    pattern: "^spba-bus(@[0-9a-f]+)?$"
> +
> +  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:
> +  - |
> +    spba-bus at 30000000 {
> +        compatible = "fsl,spba-bus", "simple-bus";
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        reg = <0x30000000 0x100000>;
> +        ranges;
> +    };
> --
> 2.32.0
>