Re: [PATCH v1 2/4] thermal: qoriq: add i.MX93 TMU support

[Alexander Stein <alexander.stein@ew.tq-group.com>]

Hi,

Am Donnerstag, 5. Januar 2023, 11:17:46 CET schrieb Alice Guo (OSS):
> From: Alice Guo <alice.guo@nxp.com>
> 
> The procedure to program the calibration table of i.MX93 TMU:
> 1. disable monitoring mode
> 2. configure TCMCFG
> 3. write TTCFGR with TTCFGR[CAL_PT] = n
> 4. write TSCFGR with the sensor value of the calibration point n
> 5. write TTRCRn associated with the calibration point n
> Need to repeat steps 3—5 for all calibration points from the calibration
> table provided by the TMU device node.
> 
> When TRITSR[V] = 1 and TRITSR[TP5] = 1, need to add 0.5K to
> TRITSR[TEMP].
> 
> IPBRR0s of lx2160ardb, lx2162aqds and i.MX93 have the same value
> 0x01900201 so that use the compatible to determine whether the current
> TMU belongs to i.MX93 or not.
> 
> Signed-off-by: Alice Guo <alice.guo@nxp.com>
> Reviewed-by: Jacky Bai <ping.bai@nxp.com>
> Reviewed-by: Ye Li <ye.li@nxp.com>
> Acked-by: Jason Liu <jason.hui.liu@nxp.com>
> ---
>  drivers/thermal/qoriq_thermal.c | 56 ++++++++++++++++++++++++++++++---
>  1 file changed, 52 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/thermal/qoriq_thermal.c
> b/drivers/thermal/qoriq_thermal.c index d111e218f362..18030bd68687 100644
> --- a/drivers/thermal/qoriq_thermal.c
> +++ b/drivers/thermal/qoriq_thermal.c
> @@ -24,9 +24,11 @@
>  #define TMTMIR_DEFAULT	0x0000000f
>  #define TIER_DISABLE	0x0
>  #define TEUMR0_V2		0x51009c00
> +#define TEUMR0_V21		0x55010c00
>  #define TMSARA_V2		0xe
>  #define TMU_VER1		0x1
>  #define TMU_VER2		0x2
> +#define TMU_VER93		0x3
> 
>  #define REGS_TMR	0x000	/* Mode Register */
>  #define TMR_DISABLE	0x0
> @@ -52,6 +54,7 @@
>  					    * Site Register
>  					    */
>  #define TRITSR_V	BIT(31)
> +#define TRITSR_TP5	BIT(9)
>  #define REGS_V2_TMSAR(n)	(0x304 + 16 * (n))	/* TMU monitoring
>  						* site adjustment 
register
>  						*/
> @@ -114,10 +117,16 @@ static int tmu_get_temp(struct thermal_zone_device
> *tz, int *temp) 10 * USEC_PER_MSEC))
>  		return -ENODATA;
> 
> -	if (qdata->ver == TMU_VER1)
> +	if (qdata->ver == TMU_VER1) {
>  		*temp = (val & GENMASK(7, 0)) * MILLIDEGREE_PER_DEGREE;
> -	else
> +	} else if (qdata->ver == TMU_VER93) {
> +		if (val & TRITSR_TP5)
> +			*temp = milli_kelvin_to_millicelsius((val & 
GENMASK(8, 0)) *
> MILLIDEGREE_PER_DEGREE + 500); +		else
> +			*temp = kelvin_to_millicelsius(val & GENMASK(8, 
0));
> +	} else {
>  		*temp = kelvin_to_millicelsius(val & GENMASK(8, 0));
> +	}
> 
>  	return 0;
>  }
> @@ -207,6 +216,33 @@ static int qoriq_tmu_calibration(struct device *dev,
>  	return 0;
>  }
> 
> +static int imx93_tmu_calibration(struct device *dev,
> +				 struct qoriq_tmu_data *data)
> +{
> +	const u32 *calibration = NULL;

This should be __be32 instead of u32.

> +	u32 cal_pt = 0;
> +	u32 val = 0;
> +	unsigned int len = 0;
> +	unsigned int i = 0;
> +
> +	calibration = of_get_property(dev->of_node, "fsl,tmu-calibration", 
&len);
> +	if (calibration == NULL || len / 8 > 16 || len % 8) {
> +		dev_err(dev, "invalid tmu calibration\n");
> +		return -ENODEV;
> +	}
> +
> +	for (i = 0; i < len; i += 0x8, calibration += 2) {
> +		cal_pt = i / 8;
> +		regmap_write(data->regmap, REGS_TTCFGR, cal_pt);
> +		val = of_read_number(calibration, 1);

of_read_number is actually expecting a __be32.

Best regards,
Alexander

> +		regmap_write(data->regmap, REGS_TSCFGR, val);
> +		val = of_read_number(calibration + 1, 1);
> +		regmap_write(data->regmap, REGS_TTRnCR(cal_pt), val);
> +	}
> +
> +	return 0;
> +}
> +
>  static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
>  {
>  	int i;
> @@ -218,6 +254,11 @@ static void qoriq_tmu_init_device(struct qoriq_tmu_data
> *data)
> 
>  	if (data->ver == TMU_VER1) {
>  		regmap_write(data->regmap, REGS_TMTMIR, TMTMIR_DEFAULT);
> +	} else if (data->ver == TMU_VER93) {
> +		regmap_write(data->regmap, REGS_V2_TMTMIR, 
TMTMIR_DEFAULT);
> +		regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V21);
> +		for (i = 0; i < SITES_MAX; i++)
> +			regmap_write(data->regmap, REGS_V2_TMSAR(i), 
TMSARA_V2);
>  	} else {
>  		regmap_write(data->regmap, REGS_V2_TMTMIR, 
TMTMIR_DEFAULT);
>  		regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
> @@ -231,7 +272,7 @@ static void qoriq_tmu_init_device(struct qoriq_tmu_data
> *data)
> 
>  static const struct regmap_range qoriq_yes_ranges[] = {
>  	regmap_reg_range(REGS_TMR, REGS_TSCFGR),
> -	regmap_reg_range(REGS_TTRnCR(0), REGS_TTRnCR(3)),
> +	regmap_reg_range(REGS_TTRnCR(0), REGS_TTRnCR(15)),
>  	regmap_reg_range(REGS_V2_TEUMR(0), REGS_V2_TEUMR(2)),
>  	regmap_reg_range(REGS_V2_TMSAR(0), REGS_V2_TMSAR(15)),
>  	regmap_reg_range(REGS_IPBRR(0), REGS_IPBRR(1)),
> @@ -319,9 +360,15 @@ static int qoriq_tmu_probe(struct platform_device
> *pdev) }
>  	data->ver = (ver >> 8) & 0xff;
> 
> +	if (of_find_compatible_node(NULL, NULL, "fsl,imx93-tmu"))
> +		data->ver = TMU_VER93;
> +
>  	qoriq_tmu_init_device(data);	/* TMU initialization */
> 
> -	ret = qoriq_tmu_calibration(dev, data);	/* TMU calibration */
> +	if (data->ver == TMU_VER93)
> +		ret = imx93_tmu_calibration(dev, data);
> +	else
> +		ret = qoriq_tmu_calibration(dev, data);	/* TMU 
calibration */
>  	if (ret < 0)
>  		return ret;
> 
> @@ -369,6 +416,7 @@ static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
>  static const struct of_device_id qoriq_tmu_match[] = {
>  	{ .compatible = "fsl,qoriq-tmu", },
>  	{ .compatible = "fsl,imx8mq-tmu", },
> +	{ .compatible = "fsl,imx93-tmu", },
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, qoriq_tmu_match);


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