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Message-ID: <eb6cc1dd-1df9-3b68-1f72-d536189c7b4d@collabora.com>
Date:   Thu, 21 Sep 2023 09:54:35 +0200
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Subject: Re: [PATCH v2 4/4] thermal/drivers/mediatek/lvts_thermal: add mt7988
 support
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To:     Frank Wunderlich <linux@fw-web.de>,
        linux-mediatek@lists.infradead.org
Cc:     Frank Wunderlich <frank-w@public-files.de>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Amit Kucheria <amitk@kernel.org>,
        Zhang Rui <rui.zhang@intel.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
References: <20230920175001.47563-1-linux@fw-web.de>
 <20230920175001.47563-5-linux@fw-web.de>
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>
In-Reply-To: <20230920175001.47563-5-linux@fw-web.de>
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Precedence: bulk

Il 20/09/23 19:50, Frank Wunderlich ha scritto:
> From: Frank Wunderlich <frank-w@public-files.de>
> 
> Add Support for Mediatek Filogic 880/MT7988 LVTS.
> 
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
> v2:
> - use 105°C for hw shutdown
> - move constants to binding file
> - change coeff.a to temp_factor and coeff.b to temp_offset
> - change to lvts to lvts-ap (Application Processor)
> - drop comments about efuse offsets
> - change comment of mt8195 to be similar to mt7988
> ---
>   drivers/thermal/mediatek/lvts_thermal.c | 46 +++++++++++++++++++++++++
>   1 file changed, 46 insertions(+)
> 
> diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
> index c2669f405a94..8fd1dc5adb16 100644
> --- a/drivers/thermal/mediatek/lvts_thermal.c
> +++ b/drivers/thermal/mediatek/lvts_thermal.c
> @@ -82,6 +82,8 @@
>   #define LVTS_GOLDEN_TEMP_DEFAULT	50
>   #define LVTS_COEFF_A_MT8195			-250460
>   #define LVTS_COEFF_B_MT8195			250460
> +#define LVTS_COEFF_A_MT7988			-204650
> +#define LVTS_COEFF_B_MT7988			204650
>   
>   #define LVTS_MSR_IMMEDIATE_MODE		0
>   #define LVTS_MSR_FILTERED_MODE		1
> @@ -89,6 +91,7 @@
>   #define LVTS_MSR_READ_TIMEOUT_US	400
>   #define LVTS_MSR_READ_WAIT_US		(LVTS_MSR_READ_TIMEOUT_US / 2)
>   
> +#define LVTS_HW_SHUTDOWN_MT7988		105000

I would simply reuse the definition of LVTS_HW_SHUTDOWN_MT8195....

>   #define LVTS_HW_SHUTDOWN_MT8195		105000
>   
>   #define LVTS_MINIMUM_THRESHOLD		20000
> @@ -1269,6 +1272,41 @@ static int lvts_remove(struct platform_device *pdev)
>   	return 0;
>   }
>   
> +/*
> + * LVTS MT7988
> + */
> +

Please remove this big comment block, that's not needed.

> +static const struct lvts_ctrl_data mt7988_lvts_ap_data_ctrl[] = {
> +	{
> +		.cal_offset = { 0x00, 0x04, 0x08, 0x0c }, //918,91C,920,924

This 918,91c,etc comment is not necessary

> +		.lvts_sensor = {
> +			{ .dt_id = MT7988_CPU_0 }, // CPU 0,1

If you want to retain those comments, you shall use the right style.

{ .dt_id = MT7988_CPU_0 }, /* CPU 0,1 */
{ .. } /* CPU 2,3 */
{ .. } /* Internal 2.5G PHY 1 */

etc

> +			{ .dt_id = MT7988_CPU_1 }, // CPU 2,3
> +			{ .dt_id = MT7988_ETH2P5G_0 }, // internal 2.5G Phy 1
> +			{ .dt_id = MT7988_ETH2P5G_1 }  // internal 2.5G Phy 2
> +		},
> +		.num_lvts_sensor = 4,
> +		.offset = 0x0,
> +		.hw_tshut_temp = LVTS_HW_SHUTDOWN_MT7988,
> +	},
> +	{
> +		.cal_offset = { 0x14, 0x18, 0x1c, 0x20 }, //92C,930,934,938

comment not needed

> +		.lvts_sensor = {
> +			{ .dt_id = MT7988_TOPS_0}, // TOPS > +			{ .dt_id = MT7988_TOPS_1}, // TOPS

The dt_id definition already says "TOPS", this comment is not needed.

> +			{ .dt_id = MT7988_ETHWARP_0}, // WED 1
> +			{ .dt_id = MT7988_ETHWARP_1}  // WED 2

Same comment about the format; /* WED 1 */

> +		},
> +		.num_lvts_sensor = 4,
> +		.offset = 0x100,
> +		.hw_tshut_temp = LVTS_HW_SHUTDOWN_MT7988,
> +	}
> +};
> +
> +/*
> + * LVTS MT8195
> + */

Please also remove this big comment block, it's not needed.

Apart from that, this patch looks good; v3 will be the golden one :-)

Cheers,
Angelo

> +
>   static const struct lvts_ctrl_data mt8195_lvts_mcu_data_ctrl[] = {
>   	{
>   		.cal_offset = { 0x04, 0x07 },
> @@ -1348,6 +1386,13 @@ static const struct lvts_ctrl_data mt8195_lvts_ap_data_ctrl[] = {
>   	}
>   };
>   
> +static const struct lvts_data mt7988_lvts_ap_data = {
> +	.lvts_ctrl	= mt7988_lvts_ap_data_ctrl,
> +	.num_lvts_ctrl	= ARRAY_SIZE(mt7988_lvts_ap_data_ctrl),
> +	.temp_factor	= LVTS_COEFF_A_MT7988,
> +	.temp_offset	= LVTS_COEFF_B_MT7988,
> +};
> +
>   static const struct lvts_data mt8195_lvts_mcu_data = {
>   	.lvts_ctrl	= mt8195_lvts_mcu_data_ctrl,
>   	.num_lvts_ctrl	= ARRAY_SIZE(mt8195_lvts_mcu_data_ctrl),
> @@ -1363,6 +1408,7 @@ static const struct lvts_data mt8195_lvts_ap_data = {
>   };
>   
>   static const struct of_device_id lvts_of_match[] = {
> +	{ .compatible = "mediatek,mt7988-lvts-ap", .data = &mt7988_lvts_ap_data },
>   	{ .compatible = "mediatek,mt8195-lvts-mcu", .data = &mt8195_lvts_mcu_data },
>   	{ .compatible = "mediatek,mt8195-lvts-ap", .data = &mt8195_lvts_ap_data },
>   	{},