Re: [PATCH v12 2/6] dt-bindings: thermal: mediatek: Add LVTS thermal controllers dt-binding definition

[Daniel Lezcano <daniel.lezcano@linaro.org>]

Hi Rob,

I think Balsam took into account your comments. Is it fine for you ?


On 26/01/2023 17:10, bchihi@baylibre.com wrote:
> From: Balsam CHIHI <bchihi@baylibre.com>
> 
> Add LVTS thermal controllers dt-binding definition for mt8195.
> 
> Signed-off-by: Balsam CHIHI <bchihi@baylibre.com>
> ---
> Changelog:
>    v12:
>       - Fixed subject prefix
>       - Fixed licences GPL-2.0+ to GPL-2.0
>       - Added dual licenses
>    v11:
>       - Rebase on top of "thermal/linux-next" :
>         base=0d568e144ead70189e7f16066dcb155b78ff9266
>       - Remove unsupported SoC (mt8192) from dt-binding definition
>    v10:
>       - Rebase on top of "thermal/linux-next" : thermal-v6.3-rc1
>    v9:
>       - Rebase on top of 6.0.0-rc1
>       - Update dt-bindings :
>         - Add "allOf:if:then:"
>         - Use mt8192 as example (instead of mt8195)
>         - Fix dt-binding errors
>         - Fix DTS errors
>    v8:
>       - Fix coding style issues
>       - Rebase on top of next-20220803
>       - Add multi-instance support :
>         - Rewrite DT-binding and DTS :
>           - Add DT-binding and DTS for LVTS_v4 (MT8192 and MT8195)
>             - One LVTS node for each HW Domain (AP and MCU)
>           - One SW Instance for each HW Domain
>    v7:
>       - Fix coding style issues
>       - Rewrite dt bindings
>         - was not accurate
>         - Use mt8195 for example (instead of mt8192)
>         - Rename mt6873 to mt8192
>         - Remove clock name
> ---
> ---
>   .../thermal/mediatek,lvts-thermal.yaml        | 107 ++++++++++++++++++
>   include/dt-bindings/thermal/mediatek-lvts.h   |  19 ++++
>   2 files changed, 126 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
>   create mode 100644 include/dt-bindings/thermal/mediatek-lvts.h
> 
> diff --git a/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
> new file mode 100644
> index 000000000000..12bfbdd8ff89
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
> @@ -0,0 +1,107 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/thermal/mediatek,lvts-thermal.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek SoC Low Voltage Thermal Sensor (LVTS)
> +
> +maintainers:
> +  - Balsam CHIHI <bchihi@baylibre.com>
> +
> +description: |
> +  LVTS is a thermal management architecture composed of three subsystems,
> +  a Sensing device - Thermal Sensing Micro Circuit Unit (TSMCU),
> +  a Converter - Low Voltage Thermal Sensor converter (LVTS), and
> +  a Digital controller (LVTS_CTRL).
> +
> +properties:
> +  compatible:
> +    enum:
> +      - mediatek,mt8195-lvts-ap
> +      - mediatek,mt8195-lvts-mcu
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +    description: LVTS reset for clearing temporary data on AP/MCU.
> +
> +  nvmem-cells:
> +    minItems: 1
> +    items:
> +      - description: Calibration eFuse data 1 for LVTS
> +      - description: Calibration eFuse data 2 for LVTS
> +
> +  nvmem-cell-names:
> +    minItems: 1
> +    items:
> +      - const: lvts-calib-data-1
> +      - const: lvts-calib-data-2
> +
> +  "#thermal-sensor-cells":
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - resets
> +  - nvmem-cells
> +  - nvmem-cell-names
> +  - "#thermal-sensor-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/mt8195-clk.h>
> +    #include <dt-bindings/reset/mt8195-resets.h>
> +    #include <dt-bindings/thermal/mediatek-lvts.h>
> +
> +    soc {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +
> +      lvts_mcu: thermal-sensor@11278000 {
> +        compatible = "mediatek,mt8195-lvts-mcu";
> +        reg = <0 0x11278000 0 0x1000>;
> +        interrupts = <GIC_SPI 170 IRQ_TYPE_LEVEL_HIGH 0>;
> +        clocks = <&infracfg_ao CLK_INFRA_AO_THERM>;
> +        resets = <&infracfg_ao MT8195_INFRA_RST4_THERM_CTRL_MCU_SWRST>;
> +        nvmem-cells = <&lvts_efuse_data1 &lvts_efuse_data2>;
> +        nvmem-cell-names = "lvts-calib-data-1", "lvts-calib-data-2";
> +        #thermal-sensor-cells = <1>;
> +      };
> +    };
> +
> +    thermal_zones: thermal-zones {
> +      cpu0-thermal {
> +        polling-delay = <1000>;
> +        polling-delay-passive = <250>;
> +        thermal-sensors = <&lvts_mcu MT8195_MCU_LITTLE_CPU0>;
> +
> +        trips {
> +          cpu0_alert: trip-alert {
> +            temperature = <85000>;
> +            hysteresis = <2000>;
> +            type = "passive";
> +          };
> +
> +          cpu0_crit: trip-crit {
> +            temperature = <100000>;
> +            hysteresis = <2000>;
> +            type = "critical";
> +          };
> +        };
> +      };
> +    };
> diff --git a/include/dt-bindings/thermal/mediatek-lvts.h b/include/dt-bindings/thermal/mediatek-lvts.h
> new file mode 100644
> index 000000000000..902d5b1e4f43
> --- /dev/null
> +++ b/include/dt-bindings/thermal/mediatek-lvts.h
> @@ -0,0 +1,19 @@
> +/* SPDX-License-Identifier: (GPL-2.0 or MIT) */
> +/*
> + * Copyright (c) 2023 MediaTek Inc.
> + * Author: Balsam CHIHI <bchihi@baylibre.com>
> + */
> +
> +#ifndef __MEDIATEK_LVTS_DT_H
> +#define __MEDIATEK_LVTS_DT_H
> +
> +#define MT8195_MCU_BIG_CPU0	0
> +#define MT8195_MCU_BIG_CPU1	1
> +#define MT8195_MCU_BIG_CPU2	2
> +#define MT8195_MCU_BIG_CPU3	3
> +#define MT8195_MCU_LITTLE_CPU0	4
> +#define MT8195_MCU_LITTLE_CPU1	5
> +#define MT8195_MCU_LITTLE_CPU2	6
> +#define MT8195_MCU_LITTLE_CPU3	7
> +
> +#endif /* __MEDIATEK_LVTS_DT_H */

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