linux-kernel - Re: [PATCH v4 10/11] dt-bindings: thermal: add binding document for h3 thermal controller

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Message-ID: <20190624085050.horyiz4wp24kzjui@flea>
Date:   Mon, 24 Jun 2019 10:50:50 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Yangtao Li <tiny.windzz@...il.com>
Cc:     rui.zhang@...el.com, edubezval@...il.com,
        daniel.lezcano@...aro.org, robh+dt@...nel.org,
        mark.rutland@....com, wens@...e.org, davem@...emloft.net,
        gregkh@...uxfoundation.org, mchehab+samsung@...nel.org,
        linus.walleij@...aro.org, nicolas.ferre@...rochip.com,
        paulmck@...ux.ibm.com, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 10/11] dt-bindings: thermal: add binding document for
 h3 thermal controller

On Sun, Jun 23, 2019 at 12:42:05PM -0400, Yangtao Li wrote:
> This patch adds binding document for allwinner h3 thermal controller.
>
> Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
> ---
>  .../bindings/thermal/sun8i-thermal.yaml       | 29 +++++++++++++++++--
>  1 file changed, 26 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/thermal/sun8i-thermal.yaml b/Documentation/devicetree/bindings/thermal/sun8i-thermal.yaml
> index 2c5acc61ed03..1eaf68b5dd5a 100644
> --- a/Documentation/devicetree/bindings/thermal/sun8i-thermal.yaml
> +++ b/Documentation/devicetree/bindings/thermal/sun8i-thermal.yaml
> @@ -16,6 +16,7 @@ description: |-
>  properties:
>    compatible:
>      enum:
> +      - allwinner,sun8i-h3-ths
>        - allwinner,sun50i-h6-ths
>
>    reg:
> @@ -29,13 +30,22 @@ properties:
>
>    clocks:
>      minItems: 1
> -    maxItems: 1
> +    maxItems: 2
>
>    clock-names:
> -    const: bus
> +    items:
> +      - const: bus
> +      - const: ahb

You need a min/maxItems here as well. Otherwise, on the H6, you will
have a warning since you asked for an array of two items, bus and ahb,
while you only have a single one.

>    '#thermal-sensor-cells':
> -    const: 1
> +    enum: [ 0, 1 ]
> +    description: |
> +      Definition depends on soc version:
> +
> +      For "allwinner,sun8i-h3-ths",
> +      value must be 0.
> +      For "allwinner,sun50i-h6-ths",
> +      value must be 1.

This must be checked using a conditional.

Something like:

if:
  properties:
    compatible:
      const: allwinner,sun8i-h3-ths

then:
  properties:
    "#thermal-sensor-cells":
      const: 0

else:
  properties:
    "#thermal-sensor-cells":
      const: 1

>    nvmem-cells:
>      items:
> @@ -55,6 +65,19 @@ required:
>    - '#thermal-sensor-cells'
>
>  examples:
> +  - |
> +    ths: ths@...5000 {
> +         compatible = "allwinner,sun8i-h3-ths";
> +         reg = <0x01c25000 0x400>;
> +         clocks = <&ccu CLK_BUS_THS>, <&ccu CLK_THS>;
> +         clock-names = "bus", "ahb";
> +         resets = <&ccu RST_BUS_THS>;
> +         interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
> +         nvmem-cells = <&tsen_calib>;
> +         nvmem-cell-names = "calib";
> +         #thermal-sensor-cells = <0>;
> +    };

Same remark here, it won't compile

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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