Subject: Re: [PATCH v2 1/2] thermal: mediatek: prepare to add support for other platforms

From: mtk17045 <[email-masked]>
Date: Fri, 10 Jul 2020 17:58:57 +0800

On Thu, 2020-04-30 at 17:14 +0800, Henry Yen wrote:
> It is known that Mediatek owns two thermal systems, which only differ
> in the way of reading calibration data and converting temperature.
> MT8173, MT8183, MT2701 and MT2712 belongs to version 1 thermal
> system, and MT7622 belongs to version 2.
> 
> In order to handle both systems, the suffix _V1 is appended to the
> current code, and then the second patch will add _V2 functions with
> the same purpose but different implementation.
> 
> Signed-off-by: Henry Yen <[email-masked]>
> ---
>  drivers/thermal/mtk_thermal.c | 114 ++++++++++++++++++----------------
>  1 file changed, 62 insertions(+), 52 deletions(-)
> 
> diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> index 76e30603d4d5..10107d9d56a8 100644
> --- a/drivers/thermal/mtk_thermal.c
> +++ b/drivers/thermal/mtk_thermal.c
> @@ -120,18 +120,18 @@
>   * MT2701 has 3 sensors and needs 3 VTS calibration data.
>   * MT2712 has 4 sensors and needs 4 VTS calibration data.
>   */
> -#define CALIB_BUF0_VALID		BIT(0)
> -#define CALIB_BUF1_ADC_GE(x)		(((x) >> 22) & 0x3ff)
> -#define CALIB_BUF0_VTS_TS1(x)		(((x) >> 17) & 0x1ff)
> -#define CALIB_BUF0_VTS_TS2(x)		(((x) >> 8) & 0x1ff)
> -#define CALIB_BUF1_VTS_TS3(x)		(((x) >> 0) & 0x1ff)
> -#define CALIB_BUF2_VTS_TS4(x)		(((x) >> 23) & 0x1ff)
> -#define CALIB_BUF2_VTS_TS5(x)		(((x) >> 5) & 0x1ff)
> -#define CALIB_BUF2_VTS_TSABB(x)		(((x) >> 14) & 0x1ff)
> -#define CALIB_BUF0_DEGC_CALI(x)		(((x) >> 1) & 0x3f)
> -#define CALIB_BUF0_O_SLOPE(x)		(((x) >> 26) & 0x3f)
> -#define CALIB_BUF0_O_SLOPE_SIGN(x)	(((x) >> 7) & 0x1)
> -#define CALIB_BUF1_ID(x)		(((x) >> 9) & 0x1)
> +#define CALIB_BUF0_VALID_V1		BIT(0)
> +#define CALIB_BUF1_ADC_GE_V1(x)		(((x) >> 22) & 0x3ff)
> +#define CALIB_BUF0_VTS_TS1_V1(x)	(((x) >> 17) & 0x1ff)
> +#define CALIB_BUF0_VTS_TS2_V1(x)	(((x) >> 8) & 0x1ff)
> +#define CALIB_BUF1_VTS_TS3_V1(x)	(((x) >> 0) & 0x1ff)
> +#define CALIB_BUF2_VTS_TS4_V1(x)	(((x) >> 23) & 0x1ff)
> +#define CALIB_BUF2_VTS_TS5_V1(x)	(((x) >> 5) & 0x1ff)
> +#define CALIB_BUF2_VTS_TSABB_V1(x)	(((x) >> 14) & 0x1ff)
> +#define CALIB_BUF0_DEGC_CALI_V1(x)	(((x) >> 1) & 0x3f)
> +#define CALIB_BUF0_O_SLOPE_V1(x)	(((x) >> 26) & 0x3f)
> +#define CALIB_BUF0_O_SLOPE_SIGN_V1(x)	(((x) >> 7) & 0x1)
> +#define CALIB_BUF1_ID_V1(x)		(((x) >> 9) & 0x1)
>  
>  enum {
>  	VTS1,
> @@ -525,7 +525,7 @@ static const struct mtk_thermal_data mt8183_thermal_data = {
>   * This converts the raw ADC value to mcelsius using the SoC specific
>   * calibration constants
>   */
> -static int raw_to_mcelsius(struct mtk_thermal *mt, int sensno, s32 raw)
> +static int raw_to_mcelsius_v1(struct mtk_thermal *mt, int sensno, s32 raw)
>  {
>  	s32 tmp;
>  
> @@ -594,9 +594,9 @@ static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
>  		raw = readl(mt->thermal_base +
>  			    conf->msr[conf->bank_data[bank->id].sensors[i]]);
>  
> -		temp = raw_to_mcelsius(mt,
> -				       conf->bank_data[bank->id].sensors[i],
> -				       raw);
> +		temp = raw_to_mcelsius_v1(mt,
> +					  conf->bank_data[bank->id].sensors[i],
> +					  raw);
>  
>  		/*
>  		 * The first read of a sensor often contains very high bogus
> @@ -758,6 +758,51 @@ static u64 of_get_phys_base(struct device_node *np)
>  	return of_translate_address(np, regaddr_p);
>  }
>  
> +static int mtk_thermal_extract_efuse_v1(struct mtk_thermal *mt, u32 *buf)
> +{
> +	int i;
> +
> +	if (!(buf[0] & CALIB_BUF0_VALID_V1))
> +		return -EINVAL;
> +
> +	mt->adc_ge = CALIB_BUF1_ADC_GE_V1(buf[1]);
> +
> +	for (i = 0; i < mt->conf->num_sensors; i++) {
> +		switch (mt->conf->vts_index[i]) {
> +		case VTS1:
> +			mt->vts[VTS1] = CALIB_BUF0_VTS_TS1_V1(buf[0]);
> +			break;
> +		case VTS2:
> +			mt->vts[VTS2] = CALIB_BUF0_VTS_TS2_V1(buf[0]);
> +			break;
> +		case VTS3:
> +			mt->vts[VTS3] = CALIB_BUF1_VTS_TS3_V1(buf[1]);
> +			break;
> +		case VTS4:
> +			mt->vts[VTS4] = CALIB_BUF2_VTS_TS4_V1(buf[2]);
> +			break;
> +		case VTS5:
> +			mt->vts[VTS5] = CALIB_BUF2_VTS_TS5_V1(buf[2]);
> +			break;
> +		case VTSABB:
> +			mt->vts[VTSABB] =
> +				CALIB_BUF2_VTS_TSABB_V1(buf[2]);
> +			break;
> +		default:
> +			break;
> +		}
> +	}
> +
> +	mt->degc_cali = CALIB_BUF0_DEGC_CALI_V1(buf[0]);
> +	if (CALIB_BUF1_ID_V1(buf[1]) &
> +	    CALIB_BUF0_O_SLOPE_SIGN_V1(buf[0]))
> +		mt->o_slope = -CALIB_BUF0_O_SLOPE_V1(buf[0]);
> +	else
> +		mt->o_slope = CALIB_BUF0_O_SLOPE_V1(buf[0]);
> +
> +	return 0;
> +}
> +
>  static int mtk_thermal_get_calibration_data(struct device *dev,
>  					    struct mtk_thermal *mt)
>  {
> @@ -793,43 +838,8 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
>  		goto out;
>  	}
>  
> -	if (buf[0] & CALIB_BUF0_VALID) {
> -		mt->adc_ge = CALIB_BUF1_ADC_GE(buf[1]);
> -
> -		for (i = 0; i < mt->conf->num_sensors; i++) {
> -			switch (mt->conf->vts_index[i]) {
> -			case VTS1:
> -				mt->vts[VTS1] = CALIB_BUF0_VTS_TS1(buf[0]);
> -				break;
> -			case VTS2:
> -				mt->vts[VTS2] = CALIB_BUF0_VTS_TS2(buf[0]);
> -				break;
> -			case VTS3:
> -				mt->vts[VTS3] = CALIB_BUF1_VTS_TS3(buf[1]);
> -				break;
> -			case VTS4:
> -				mt->vts[VTS4] = CALIB_BUF2_VTS_TS4(buf[2]);
> -				break;
> -			case VTS5:
> -				mt->vts[VTS5] = CALIB_BUF2_VTS_TS5(buf[2]);
> -				break;
> -			case VTSABB:
> -				mt->vts[VTSABB] = CALIB_BUF2_VTS_TSABB(buf[2]);
> -				break;
> -			default:
> -				break;
> -			}
> -		}
> -
> -		mt->degc_cali = CALIB_BUF0_DEGC_CALI(buf[0]);
> -		if (CALIB_BUF1_ID(buf[1]) &
> -		    CALIB_BUF0_O_SLOPE_SIGN(buf[0]))
> -			mt->o_slope = -CALIB_BUF0_O_SLOPE(buf[0]);
> -		else
> -			mt->o_slope = CALIB_BUF0_O_SLOPE(buf[0]);
> -	} else {
> +	if (mtk_thermal_extract_efuse_v1(mt, buf))
>  		dev_info(dev, "Device not calibrated, using default calibration values\n");
> -	}
>  
>  out:
>  	kfree(buf);
Just gently ping.    
Many thanks.

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