linux-kernel - Re: [PATCH v8 6/6] arm64: dts: mt8195: Add thermal zone

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Message-ID: <20220729202241.isw3hjo3jclzxhbl@notapiano>
Date:   Fri, 29 Jul 2022 16:22:41 -0400
From:   Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
To:     Balsam CHIHI <bchihi@...libre.com>
Cc:     rafael@...nel.org, rui.zhang@...el.com, daniel.lezcano@...aro.org,
        amitk@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, khilman@...libre.com,
        mka@...omium.org, robh+dt@...nel.org, krzk+dt@...nel.org,
        matthias.bgg@...il.com, p.zabel@...gutronix.de,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, james.lo@...iatek.com,
        fan.chen@...iatek.com, louis.yu@...iatek.com,
        rex-bc.chen@...iatek.com, abailon@...libre.com
Subject: Re: [PATCH v8 6/6] arm64: dts: mt8195: Add thermal zone

On Tue, Jul 26, 2022 at 03:55:06PM +0200, Balsam CHIHI wrote:
> This adds the thermal zone for the mt8195.
> 
> Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
> Signed-off-by: Ben Tseng <ben.tseng@...iatek.com>
> Signed-off-by: Alexandre Bailon <abailon@...libre.com>
> Signed-off-by: Balsam CHIHI <bchihi@...libre.com>
> ---
>  arch/arm64/boot/dts/mediatek/mt8195.dtsi | 115 ++++++++++++++++++++++-
>  1 file changed, 114 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> index 4fbf24b5d202..78017224930c 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> @@ -1,6 +1,6 @@
>  // SPDX-License-Identifier: (GPL-2.0 OR MIT)
>  /*
> - * Copyright (c) 2021 MediaTek Inc.
> + * Copyright (c) 2022 MediaTek Inc.
>   * Author: Seiya Wang <seiya.wang@...iatek.com>
>   */
>  
> @@ -11,6 +11,9 @@
>  #include <dt-bindings/memory/mt8195-memory-port.h>
>  #include <dt-bindings/phy/phy.h>
>  #include <dt-bindings/pinctrl/mt8195-pinfunc.h>
> +#include <dt-bindings/power/mt8195-power.h>
> +#include <dt-bindings/reset/mt8195-resets.h>
> +#include <dt-bindings/thermal/thermal.h>

You're not actually using the mt8195-power and thermal includes.

>  
>  / {
>  	compatible = "mediatek,mt8195";
> @@ -810,6 +813,28 @@ spi0: spi@...0a000 {
>  			status = "disabled";
>  		};
>  
> +		lvtsap: thermal-sensor@...0b000 {

Can you name this label lvts_ap, and the one below lvts_mcu, please? Makes it
much more readable.

> +			compatible = "mediatek,mt8195-lvts-ap";
> +			#thermal-sensor-cells = <1>;
> +			reg = <0 0x1100b000 0 0x400>;

Don't you need the reg size to be 0x1000 to be able to access THERMINTST in the
soc_temp_lvts.c?

> +			interrupts = <GIC_SPI 169 IRQ_TYPE_LEVEL_HIGH 0>;
> +			clocks = <&infracfg_ao CLK_INFRA_AO_THERM>;
> +			resets = <&infracfg_ao MT8195_INFRA_RST0_THERM_CTRL_SWRST>;
> +			nvmem-cells = <&lvts_efuse_data1 &lvts_efuse_data2>;
> +			nvmem-cell-names = "lvts_calib_data1", "lvts_calib_data2";
> +		};
> +
> +		lvtsmcu: thermal-sensor@...78000 {
> +			compatible = "mediatek,mt8195-lvts-mcu";
> +			#thermal-sensor-cells = <1>;
> +			reg = <0 0x11278000 0 0x400>;
> +			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_data1", "lvts_calib_data2";
> +		};
> +
>  		spi1: spi@...10000 {
>  			compatible = "mediatek,mt8195-spi",
>  				     "mediatek,mt6765-spi";
> @@ -1613,4 +1638,92 @@ vencsys_core1: clock-controller@...00000 {
>  			#clock-cells = <1>;
>  		};
>  	};
> +
> +	thermal_zones: thermal-zones {
> +		cpu-big1-thermal {
> +			polling-delay = <0>; /* milliseconds */
> +			polling-delay-passive = <0>; /* milliseconds */

Please drop all these '/* milliseconds */' comments. The thermal-zones
dt-binding already defines both of these properties as being in milliseconds, so
this is just polluting the DT.

Thanks,
Nícolas