linux-kernel - Re: [PATCH v5 1/4] dt-bindings: thermal: k3: Add VTM bindings documentation

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Date:   Sat, 4 Apr 2020 13:00:00 +0530
From:   Amit Kucheria <amit.kucheria@...durent.com>
To:     Keerthy <j-keerthy@...com>
Cc:     Zhang Rui <rui.zhang@...el.com>, Rob Herring <robh+dt@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>, t-kristo@...com,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        lakml <linux-arm-kernel@...ts.infradead.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v5 1/4] dt-bindings: thermal: k3: Add VTM bindings documentation

On Tue, Mar 31, 2020 at 1:24 PM Keerthy <j-keerthy@...com> wrote:
>
> Add VTM bindings documentation. In the Voltage Thermal
> Management Module(VTM), K3 AM654 supplies a voltage
> reference and a temperature sensor feature that are gathered in the band
> gap voltage and temperature sensor (VBGAPTS) module. The band
> gap provides current and voltage reference for its internal
> circuits and other analog IP blocks. The analog-to-digital
> converter (ADC) produces an output value that is proportional
> to the silicon temperature.
>
> Signed-off-by: Keerthy <j-keerthy@...com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> ---
>
> Changes in v5:
>
>   * Added Reviewed-by: Rob Herring <robh@...nel.org>
>
>  .../bindings/thermal/ti,am654-thermal.yaml    | 56 +++++++++++++++++++
>  1 file changed, 56 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml
>
> diff --git a/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml b/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml
> new file mode 100644
> index 000000000000..d241b65d6072
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml
> @@ -0,0 +1,56 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/thermal/ti,am654-thermal.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments AM654 VTM (DTS) binding
> +
> +maintainers:
> +  - Keerthy <j-keerthy@...com>
> +
> +properties:
> +  compatible:
> +    const: ti,am654-vtm
> +
> +  reg:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  "#thermal-sensor-cells":
> +    const: 1
> +
> +required:
> +  - "#thermal-sensor-cells"
> +  - compatible
> +  - reg
> +  - power-domains
> +

A nit-pick: arrange the required properties in order they're listed above.

> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/soc/ti,sci_pm_domain.h>
> +    vtm: thermal@...50000 {
> +        compatible = "ti,am654-vtm";
> +        reg = <0x0 0x42050000 0x0 0x25c>;
> +        power-domains = <&k3_pds 80 TI_SCI_PD_EXCLUSIVE>;
> +        #thermal-sensor-cells = <1>;
> +    };
> +
> +    mpu0_thermal: mpu0_thermal {
> +        polling-delay-passive = <250>; /* milliseconds */
> +        polling-delay = <500>; /* milliseconds */
> +        thermal-sensors = <&vtm0 0>;
> +
> +        trips {
> +                mpu0_crit: mpu0_crit {
> +                        temperature = <125000>; /* milliCelsius */
> +                        hysteresis = <2000>; /* milliCelsius */
> +                        type = "critical";
> +                };
> +        };
> +    };
> +...
> --
> 2.17.1
>