linux-kernel - Re: [PATCH 2/2] dt-bindings: timer: renesas,tpu: Convert to json-schema

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Message-ID: <20210508152618.GA3004584@robh.at.kernel.org>
Date:   Sat, 8 May 2021 10:26:18 -0500
From:   Rob Herring <robh@...nel.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Lee Jones <lee.jones@...aro.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        devicetree@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        uclinux-h8-devel@...ts.sourceforge.jp, linux-pwm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: timer: renesas,tpu: Convert to
 json-schema

On Fri, May 07, 2021 at 10:25:13AM +0200, Geert Uytterhoeven wrote:
> Convert the Renesas H8/300 Timer Pulse Unit Device Tree binding
> documentation to json-schema.
> 
> Correct clock-names, as "peripheral_clk" is the name of the supplier,
> and all users use "fck".
> 
> Note that there are two different bindings for the TPU, both using
> "renesas,tpu": this one for using the TPU as a clock source (used on
> H8/300), and a second use for using the TPU as a PWM controller (used on
> ARM).  To avoid conflicts, both bindings are marked with the appropriate
> "select" logic, to check for the absence respectively presence of the
> "#pwm-cells" property.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> I have listed Sato-san as the maintainer, as he wrote the original
> driver and bindings.
> Sato-san: Please scream if this is inappropriate ;-)
> ---
>  .../bindings/pwm/renesas,tpu-pwm.yaml         | 10 ++++
>  .../devicetree/bindings/timer/renesas,tpu.txt | 21 -------
>  .../bindings/timer/renesas,tpu.yaml           | 56 +++++++++++++++++++
>  3 files changed, 66 insertions(+), 21 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/timer/renesas,tpu.txt
>  create mode 100644 Documentation/devicetree/bindings/timer/renesas,tpu.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pwm/renesas,tpu-pwm.yaml b/Documentation/devicetree/bindings/pwm/renesas,tpu-pwm.yaml
> index 3a072ee29815c695..f8bc8c5905daa14c 100644
> --- a/Documentation/devicetree/bindings/pwm/renesas,tpu-pwm.yaml
> +++ b/Documentation/devicetree/bindings/pwm/renesas,tpu-pwm.yaml
> @@ -9,6 +9,16 @@ title: Renesas R-Car Timer Pulse Unit PWM Controller
>  maintainers:
>    - Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
>  
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        const: renesas,tpu
> +    '#pwm-cells': true

You can drop this line. The schema is still true if not present which is 
why 'required' is needed.

With that,

Reviewed-by: Rob Herring <robh@...nel.org>

> +  required:
> +    - compatible
> +    - '#pwm-cells'
> +
>  properties:
>    compatible:
>      items:
> diff --git a/Documentation/devicetree/bindings/timer/renesas,tpu.txt b/Documentation/devicetree/bindings/timer/renesas,tpu.txt
> deleted file mode 100644
> index 1d46f9de4feb8a84..0000000000000000
> --- a/Documentation/devicetree/bindings/timer/renesas,tpu.txt
> +++ /dev/null
> @@ -1,21 +0,0 @@
> -* Renesas H8/300 Timer Pulse Unit
> -
> -The TPU is a 16bit timer/counter with configurable clock inputs and
> -programmable compare match.
> -This implementation support only cascade mode.
> -
> -Required Properties:
> -
> -  - compatible: must contain "renesas,tpu"
> -  - reg: base address and length of the registers block in 2 channel.
> -  - clocks: a list of phandle, one for each entry in clock-names.
> -  - clock-names: must contain "peripheral_clk" for the functional clock.
> -
> -
> -Example:
> -	tpu: tpu@...fe0 {
> -		compatible = "renesas,tpu";
> -		reg = <0xffffe0 16>, <0xfffff0 12>;
> -		clocks = <&pclk>;
> -		clock-names = "peripheral_clk";
> -	};
> diff --git a/Documentation/devicetree/bindings/timer/renesas,tpu.yaml b/Documentation/devicetree/bindings/timer/renesas,tpu.yaml
> new file mode 100644
> index 0000000000000000..01554dff23d8a954
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/timer/renesas,tpu.yaml
> @@ -0,0 +1,56 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/timer/renesas,tpu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas H8/300 Timer Pulse Unit
> +
> +maintainers:
> +  - Yoshinori Sato <ysato@...rs.sourceforge.jp>
> +
> +description:
> +  The TPU is a 16bit timer/counter with configurable clock inputs and
> +  programmable compare match.
> +  This implementation supports only cascade mode.
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        const: renesas,tpu
> +    '#pwm-cells': false
> +  required:
> +    - compatible
> +
> +properties:
> +  compatible:
> +    const: renesas,tpu
> +
> +  reg:
> +    items:
> +      - description: First channel
> +      - description: Second channel
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    const: fck
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    tpu: tpu@...fe0 {
> +            compatible = "renesas,tpu";
> +            reg = <0xffffe0 16>, <0xfffff0 12>;
> +            clocks = <&pclk>;
> +            clock-names = "fck";
> +    };
> -- 
> 2.25.1
>