Re: [PATCH v3 4/4] thermal/drivers/mediatek/lvts_thermal: add mt7988 support

[Daniel Golle]

On Fri, Sep 22, 2023 at 07:50:20AM +0200, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>
> 
> Add Support for Mediatek Filogic 880/MT7988 LVTS.
> 
> Signed-off-by: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>

Tested-by: Daniel Golle <daniel@xxxxxxxxxxxxxx>

> ---
> v3:
> - drop comments
> 
> 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 | 38 +++++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
> 
> diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
> index c2669f405a94..23b4e0b3195c 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
>  #define LVTS_HW_SHUTDOWN_MT8195		105000
>  
>  #define LVTS_MINIMUM_THRESHOLD		20000
> @@ -1269,6 +1272,33 @@ static int lvts_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static const struct lvts_ctrl_data mt7988_lvts_ap_data_ctrl[] = {
> +	{
> +		.cal_offset = { 0x00, 0x04, 0x08, 0x0c },
> +		.lvts_sensor = {
> +			{ .dt_id = MT7988_CPU_0 },
> +			{ .dt_id = MT7988_CPU_1 },
> +			{ .dt_id = MT7988_ETH2P5G_0 },
> +			{ .dt_id = MT7988_ETH2P5G_1 }
> +		},
> +		.num_lvts_sensor = 4,
> +		.offset = 0x0,
> +		.hw_tshut_temp = LVTS_HW_SHUTDOWN_MT7988,
> +	},
> +	{
> +		.cal_offset = { 0x14, 0x18, 0x1c, 0x20 },
> +		.lvts_sensor = {
> +			{ .dt_id = MT7988_TOPS_0},
> +			{ .dt_id = MT7988_TOPS_1},
> +			{ .dt_id = MT7988_ETHWARP_0},
> +			{ .dt_id = MT7988_ETHWARP_1}
> +		},
> +		.num_lvts_sensor = 4,
> +		.offset = 0x100,
> +		.hw_tshut_temp = LVTS_HW_SHUTDOWN_MT7988,
> +	}
> +};
> +
>  static const struct lvts_ctrl_data mt8195_lvts_mcu_data_ctrl[] = {
>  	{
>  		.cal_offset = { 0x04, 0x07 },
> @@ -1348,6 +1378,13 @@ 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 +1400,7 @@ 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 },
>  	{},
> -- 
> 2.34.1
>