linux-kernel - Re: [PATCH v6 1/4] dt-bindings: thermal: k3-j72xx: Add VTM bindings documentation

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Date:   Mon, 9 May 2022 08:48:12 +0530
From:   "J, KEERTHY" <j-keerthy@...com>
To:     <robh+dt@...nel.org>, <daniel.lezcano@...aro.org>,
        <rui.zhang@...el.com>, <amitk@...nel.org>, <kristo@...nel.org>,
        <vigneshr@...com>, <krzysztof.kozlowski@...aro.org>
CC:     <linux-pm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 1/4] dt-bindings: thermal: k3-j72xx: Add VTM bindings
 documentation



On 4/27/2022 12:16 PM, Keerthy wrote:
> Add VTM bindings documentation. In the Voltage Thermal
> Management Module(VTM), K3 J72XX 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.

Hi krzysztof,

Any comments on this version?

- Keerthy

> 
> Signed-off-by: Keerthy <j-keerthy@...com>
> ---
>   .../bindings/thermal/ti,j72xx-thermal.yaml    | 64 +++++++++++++++++++
>   1 file changed, 64 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
> 
> diff --git a/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml b/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
> new file mode 100644
> index 000000000000..84b70fb108da
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/thermal/ti,j72xx-thermal.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments J72XX VTM (DTS) binding
> +
> +maintainers:
> +  - Keerthy <j-keerthy@...com>
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - ti,j721e-vtm
> +          - ti,j7200-vtm
> +
> +  reg:
> +    maxItems: 3
> +    description:
> +      Must be 3, in order to specify three register spaces for VTM cfg1, cfg2
> +      and efuse register space.
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  "#thermal-sensor-cells":
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - power-domains
> +  - "#thermal-sensor-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/soc/ti,sci_pm_domain.h>
> +    wkup_vtm0: thermal-sensor@...40000 {
> +        compatible = "ti,j721e-vtm";
> +        reg = <0x42040000 0x350>,
> +            <0x42050000 0x350>,
> +            <0x43000300 0x10>;
> +        power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>;
> +        #thermal-sensor-cells = <1>;
> +    };
> +
> +    mpu_thermal: mpu-thermal {
> +        polling-delay-passive = <250>; /* milliseconds */
> +        polling-delay = <500>; /* milliseconds */
> +        thermal-sensors = <&wkup_vtm0 0>;
> +
> +        trips {
> +                mpu_crit: mpu-crit {
> +                        temperature = <125000>; /* milliCelsius */
> +                        hysteresis = <2000>; /* milliCelsius */
> +                        type = "critical";
> +                };
> +        };
> +    };
> +...