linux-kernel - Re: [PATCH v2 1/2] dt-bindings: thermal: sprd: Add the Spreadtrum thermal documentation

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Date:   Thu, 19 Dec 2019 14:12:49 -0600
From:   Rob Herring <robh@...nel.org>
To:     Baolin Wang <baolin.wang7@...il.com>
Cc:     rui.zhang@...el.com, edubezval@...il.com,
        daniel.lezcano@...aro.org, amit.kucheria@...durent.com,
        mark.rutland@....com, orsonzhai@...il.com, baolin.wang@...aro.org,
        freeman.liu@...soc.com, zhang.lyra@...il.com,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: thermal: sprd: Add the Spreadtrum
 thermal documentation

On Tue, Dec 10, 2019 at 08:07:17PM +0800, Baolin Wang wrote:
> From: Baolin Wang <baolin.wang@...soc.com>
> 
> Add the Spreadtrum thermal documentation.
> 
> Signed-off-by: Baolin Wang <baolin.wang@...soc.com>
> Signed-off-by: Baolin Wang <baolin.wang7@...il.com>
> ---
> Changes from v1:
>  - Change to yaml format.
> ---
>  .../devicetree/bindings/thermal/sprd-thermal.yaml  |   97 ++++++++++++++++++++
>  1 file changed, 97 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/sprd-thermal.yaml
> 
> diff --git a/Documentation/devicetree/bindings/thermal/sprd-thermal.yaml b/Documentation/devicetree/bindings/thermal/sprd-thermal.yaml
> new file mode 100644
> index 0000000..92d208a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/sprd-thermal.yaml
> @@ -0,0 +1,97 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/thermal/sprd-thermal.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Spreadtrum thermal sensor controller bindings
> +
> +maintainers:
> +  - Orson Zhai <orsonzhai@...il.com>
> +  - Baolin Wang <baolin.wang7@...il.com>
> +  - Chunyan Zhang <zhang.lyra@...il.com>
> +
> +properties:
> +  compatible:
> +    const: sprd,ums512-thermal
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: enable
> +
> +  nvmem-cells:
> +    maxItems: 2
> +    description:
> +      Reference to nvmem nodes for the calibration data.
> +
> +  nvmem-cells-names:
> +    maxItems: 2
> +    items:
> +      - const: thm_sign_cal
> +      - const: thm_ratio_cal
> +
> +  "#thermal-sensor-cells":
> +    const: 1
> +
> +  child-node:

You need actual child node names. It can be a pattern with 
patternProperties.

Make sure 'make dt_binding_check' passes.

> +    description: Represent one thermal sensor.
> +
> +    properties:
> +      reg:
> +        description: Specify the sensor id.
> +        maxItems: 1
> +
> +      nvmem-cells:
> +        maxItems: 1
> +        description:
> +          Reference to an nvmem node for the calibration data.
> +
> +      nvmem-cells-names:
> +        maxItems: 1
> +        items:
> +          - const: sen_delta_cal

Can be simplified to

nvmem-cells-names:
  const: sen_delta_cal

> +
> +    required:
> +      - reg
> +      - nvmem-cells
> +      - nvmem-cells-names
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - nvmem-cells
> +  - nvmem-cells-names
> +  - "#thermal-sensor-cells"
> +
> +examples:
> +  - |
> +        ap_thm0: thermal@...00000 {
> +                compatible = "sprd,ums512-thermal";
> +                reg = <0 0x32200000 0 0x10000>;
> +                clock-names = "enable";
> +                clocks = <&aonapb_gate 32>;
> +                #thermal-sensor-cells = <1>;
> +                nvmem-cells = <&thm0_sign>, <&thm0_ratio>;
> +                nvmem-cell-names = "thm_sign_cal", "thm_ratio_cal";
> +
> +                prometheus0-sensor@0 {
> +                        reg = <0>;

This should fail to build. You need #size-cells and #address-cells in 
the parent.

> +                        nvmem-cells = <&thm0_sen0>;
> +                        nvmem-cell-names = "sen_delta_cal";
> +                };
> +
> +                ank1-sensor@1 {
> +                        reg = <1>;
> +                        nvmem-cells = <&thm0_sen1>;
> +                        nvmem-cell-names = "sen_delta_cal";
> +                };
> +        };
> +...
> -- 
> 1.7.9.5
>