drivers/thermal/imx8mm_thermal.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2020 NXP.
  *
  * Author: Anson Huang <Anson.Huang@nxp.com>
  */

 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/nvmem-consumer.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/thermal.h>

 #include "thermal_hwmon.h"

 #define TER			0x0	/* TMU enable */
 #define TPS			0x4
 #define TRITSR			0x20	/* TMU immediate temp */
 /* TMU calibration data registers */
 #define TASR			0x28
 #define TASR_BUF_SLOPE_MASK	GENMASK(19, 16)
 #define TASR_BUF_VREF_MASK	GENMASK(4, 0)	/* TMU_V1 */
 #define TASR_BUF_VERF_SEL_MASK	GENMASK(1, 0)	/* TMU_V2 */
 #define TCALIV(n)		(0x30 + ((n) * 4))
 #define TCALIV_EN		BIT(31)
 #define TCALIV_HR_MASK		GENMASK(23, 16)	/* TMU_V1 */
 #define TCALIV_RT_MASK		GENMASK(7, 0)	/* TMU_V1 */
 #define TCALIV_SNSR105C_MASK	GENMASK(27, 16)	/* TMU_V2 */
 #define TCALIV_SNSR25C_MASK	GENMASK(11, 0)	/* TMU_V2 */
 #define TRIM			0x3c
 #define TRIM_BJT_CUR_MASK	GENMASK(23, 20)
 #define TRIM_BGR_MASK		GENMASK(31, 28)
 #define TRIM_VLSB_MASK		GENMASK(15, 12)
 #define TRIM_EN_CH		BIT(7)

 #define TER_ADC_PD		BIT(30)
 #define TER_EN			BIT(31)
 #define TRITSR_TEMP0_VAL_MASK	GENMASK(7, 0)
 #define TRITSR_TEMP1_VAL_MASK	GENMASK(23, 16)

 #define PROBE_SEL_ALL		GENMASK(31, 30)

 #define probe_status_offset(x)	(30 + x)
 #define SIGN_BIT		BIT(7)
 #define TEMP_VAL_MASK		GENMASK(6, 0)

 /* TMU OCOTP calibration data bitfields */
 #define ANA0_EN			BIT(25)
 #define ANA0_BUF_VREF_MASK	GENMASK(24, 20)
 #define ANA0_BUF_SLOPE_MASK	GENMASK(19, 16)
 #define ANA0_HR_MASK		GENMASK(15, 8)
 #define ANA0_RT_MASK		GENMASK(7, 0)
 #define TRIM2_VLSB_MASK		GENMASK(23, 20)
 #define TRIM2_BGR_MASK		GENMASK(19, 16)
 #define TRIM2_BJT_CUR_MASK	GENMASK(15, 12)
 #define TRIM2_BUF_SLOP_SEL_MASK	GENMASK(11, 8)
 #define TRIM2_BUF_VERF_SEL_MASK	GENMASK(7, 6)
 #define TRIM3_TCA25_0_LSB_MASK	GENMASK(31, 28)
 #define TRIM3_TCA40_0_MASK	GENMASK(27, 16)
 #define TRIM4_TCA40_1_MASK	GENMASK(31, 20)
 #define TRIM4_TCA105_0_MASK	GENMASK(19, 8)
 #define TRIM4_TCA25_0_MSB_MASK	GENMASK(7, 0)
 #define TRIM5_TCA105_1_MASK	GENMASK(23, 12)
 #define TRIM5_TCA25_1_MASK	GENMASK(11, 0)

 #define VER1_TEMP_LOW_LIMIT	10000
 #define VER2_TEMP_LOW_LIMIT	-40000
 #define VER2_TEMP_HIGH_LIMIT	125000

 #define TMU_VER1		0x1
 #define TMU_VER2		0x2

 struct thermal_soc_data {
 	u32 num_sensors;
 	u32 version;
 	int (*get_temp)(void *, int *);
 };

 struct tmu_sensor {
 	struct imx8mm_tmu *priv;
 	u32 hw_id;
 	struct thermal_zone_device *tzd;
 };

 struct imx8mm_tmu {
 	void __iomem *base;
 	struct clk *clk;
 	const struct thermal_soc_data *socdata;
 	struct tmu_sensor sensors[];
 };

 static int imx8mm_tmu_get_temp(void *data, int *temp)
 {
 	struct tmu_sensor *sensor = data;
 	struct imx8mm_tmu *tmu = sensor->priv;
 	u32 val;

 	val = readl_relaxed(tmu->base + TRITSR) & TRITSR_TEMP0_VAL_MASK;

 	/*
 	 * Do not validate against the V bit (bit 31) due to errata
 	 * ERR051272: TMU: Bit 31 of registers TMU_TSCR/TMU_TRITSR/TMU_TRATSR invalid
 	 */

 	*temp = val * 1000;
 	if (*temp < VER1_TEMP_LOW_LIMIT || *temp > VER2_TEMP_HIGH_LIMIT)
 		return -EAGAIN;

 	return 0;
 }

 static int imx8mp_tmu_get_temp(void *data, int *temp)
 {
 	struct tmu_sensor *sensor = data;
 	struct imx8mm_tmu *tmu = sensor->priv;
 	unsigned long val;
 	bool ready;

 	val = readl_relaxed(tmu->base + TRITSR);
 	ready = test_bit(probe_status_offset(sensor->hw_id), &val);
 	if (!ready)
 		return -EAGAIN;

 	val = sensor->hw_id ? FIELD_GET(TRITSR_TEMP1_VAL_MASK, val) :
 	      FIELD_GET(TRITSR_TEMP0_VAL_MASK, val);
 	if (val & SIGN_BIT) /* negative */
 		val = (~(val & TEMP_VAL_MASK) + 1);

 	*temp = val * 1000;
 	if (*temp < VER2_TEMP_LOW_LIMIT || *temp > VER2_TEMP_HIGH_LIMIT)
 		return -EAGAIN;

 	return 0;
 }

 static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
 {
 	struct tmu_sensor *sensor = thermal_zone_device_priv(tz);
 	struct imx8mm_tmu *tmu = sensor->priv;

 	return tmu->socdata->get_temp(sensor, temp);
 }

 static const struct thermal_zone_device_ops tmu_tz_ops = {
 	.get_temp = tmu_get_temp,
 };

 static void imx8mm_tmu_enable(struct imx8mm_tmu *tmu, bool enable)
 {
 	u32 val;

 	val = readl_relaxed(tmu->base + TER);
 	val = enable ? (val | TER_EN) : (val & ~TER_EN);
 	if (tmu->socdata->version == TMU_VER2)
 		val = enable ? (val & ~TER_ADC_PD) : (val | TER_ADC_PD);
 	writel_relaxed(val, tmu->base + TER);
 }

 static void imx8mm_tmu_probe_sel_all(struct imx8mm_tmu *tmu)
 {
 	u32 val;

 	val = readl_relaxed(tmu->base + TPS);
 	val |= PROBE_SEL_ALL;
 	writel_relaxed(val, tmu->base + TPS);
 }

 static int imx8mm_tmu_probe_set_calib_v1(struct platform_device *pdev,
 					 struct imx8mm_tmu *tmu)
 {
 	struct device *dev = &pdev->dev;
 	u32 ana0;
 	int ret;

 	ret = nvmem_cell_read_u32(&pdev->dev, "calib", &ana0);
 	if (ret) {
 		dev_warn(dev, "Failed to read OCOTP nvmem cell (%d).\n", ret);
 		return ret;
 	}

 	writel(FIELD_PREP(TASR_BUF_VREF_MASK,
 			  FIELD_GET(ANA0_BUF_VREF_MASK, ana0)) |
 	       FIELD_PREP(TASR_BUF_SLOPE_MASK,
 			  FIELD_GET(ANA0_BUF_SLOPE_MASK, ana0)),
 	       tmu->base + TASR);

 	writel(FIELD_PREP(TCALIV_RT_MASK, FIELD_GET(ANA0_RT_MASK, ana0)) |
 	       FIELD_PREP(TCALIV_HR_MASK, FIELD_GET(ANA0_HR_MASK, ana0)) |
 	       ((ana0 & ANA0_EN) ? TCALIV_EN : 0),
 	       tmu->base + TCALIV(0));

 	return 0;
 }

 static int imx8mm_tmu_probe_set_calib_v2(struct platform_device *pdev,
 					 struct imx8mm_tmu *tmu)
 {
 	struct device *dev = &pdev->dev;
 	struct nvmem_cell *cell;
 	u32 trim[4] = { 0 };
 	size_t len;
 	void *buf;

 	cell = nvmem_cell_get(dev, "calib");
 	if (IS_ERR(cell))
 		return PTR_ERR(cell);

 	buf = nvmem_cell_read(cell, &len);
 	nvmem_cell_put(cell);

 	if (IS_ERR(buf))
 		return PTR_ERR(buf);

 	memcpy(trim, buf, min(len, sizeof(trim)));
 	kfree(buf);

 	if (len != 16) {
 		dev_err(dev,
 			"OCOTP nvmem cell length is %zu, must be 16.\n", len);
 		return -EINVAL;
 	}

 	/* Blank sample hardware */
 	if (!trim[0] && !trim[1] && !trim[2] && !trim[3]) {
 		/* Use a default 25C binary codes */
 		writel(FIELD_PREP(TCALIV_SNSR25C_MASK, 0x63c),
 		       tmu->base + TCALIV(0));
 		writel(FIELD_PREP(TCALIV_SNSR25C_MASK, 0x63c),
 		       tmu->base + TCALIV(1));
 		return 0;
 	}

 	writel(FIELD_PREP(TASR_BUF_VERF_SEL_MASK,
 			  FIELD_GET(TRIM2_BUF_VERF_SEL_MASK, trim[0])) |
 	       FIELD_PREP(TASR_BUF_SLOPE_MASK,
 			  FIELD_GET(TRIM2_BUF_SLOP_SEL_MASK, trim[0])),
 	       tmu->base + TASR);

 	writel(FIELD_PREP(TRIM_BJT_CUR_MASK,
 			  FIELD_GET(TRIM2_BJT_CUR_MASK, trim[0])) |
 	       FIELD_PREP(TRIM_BGR_MASK, FIELD_GET(TRIM2_BGR_MASK, trim[0])) |
 	       FIELD_PREP(TRIM_VLSB_MASK, FIELD_GET(TRIM2_VLSB_MASK, trim[0])) |
 	       TRIM_EN_CH,
 	       tmu->base + TRIM);

 	writel(FIELD_PREP(TCALIV_SNSR25C_MASK,
 			  FIELD_GET(TRIM3_TCA25_0_LSB_MASK, trim[1]) |
 			  (FIELD_GET(TRIM4_TCA25_0_MSB_MASK, trim[2]) << 4)) |
 	       FIELD_PREP(TCALIV_SNSR105C_MASK,
 			  FIELD_GET(TRIM4_TCA105_0_MASK, trim[2])),
 	       tmu->base + TCALIV(0));

 	writel(FIELD_PREP(TCALIV_SNSR25C_MASK,
 			  FIELD_GET(TRIM5_TCA25_1_MASK, trim[3])) |
 	       FIELD_PREP(TCALIV_SNSR105C_MASK,
 			  FIELD_GET(TRIM5_TCA105_1_MASK, trim[3])),
 	       tmu->base + TCALIV(1));

 	writel(FIELD_PREP(TCALIV_SNSR25C_MASK,
 			  FIELD_GET(TRIM3_TCA40_0_MASK, trim[1])) |
 	       FIELD_PREP(TCALIV_SNSR105C_MASK,
 			  FIELD_GET(TRIM4_TCA40_1_MASK, trim[2])),
 	       tmu->base + TCALIV(2));

 	return 0;
 }

 static int imx8mm_tmu_probe_set_calib(struct platform_device *pdev,
 				      struct imx8mm_tmu *tmu)
 {
 	struct device *dev = &pdev->dev;

 	/*
 	 * Lack of calibration data OCOTP reference is not considered
 	 * fatal to retain compatibility with old DTs. It is however
 	 * strongly recommended to update such old DTs to get correct
 	 * temperature compensation values for each SoC.
 	 */
 	if (!of_property_present(pdev->dev.of_node, "nvmem-cells")) {
 		dev_warn(dev,
 			 "No OCOTP nvmem reference found, SoC-specific calibration not loaded. Please update your DT.\n");
 		return 0;
 	}

 	if (tmu->socdata->version == TMU_VER1)
 		return imx8mm_tmu_probe_set_calib_v1(pdev, tmu);

 	return imx8mm_tmu_probe_set_calib_v2(pdev, tmu);
 }

 static int imx8mm_tmu_probe(struct platform_device *pdev)
 {
 	const struct thermal_soc_data *data;
 	struct imx8mm_tmu *tmu;
 	int ret;
 	int i;

 	data = of_device_get_match_data(&pdev->dev);

 	tmu = devm_kzalloc(&pdev->dev, struct_size(tmu, sensors,
 			   data->num_sensors), GFP_KERNEL);
 	if (!tmu)
 		return -ENOMEM;

 	tmu->socdata = data;

 	tmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(tmu->base))
 		return PTR_ERR(tmu->base);

 	tmu->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(tmu->clk))
 		return dev_err_probe(&pdev->dev, PTR_ERR(tmu->clk),
 				     "failed to get tmu clock\n");

 	ret = clk_prepare_enable(tmu->clk);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to enable tmu clock: %d\n", ret);
 		return ret;
 	}

 	/* disable the monitor during initialization */
 	imx8mm_tmu_enable(tmu, false);

 	for (i = 0; i < data->num_sensors; i++) {
 		tmu->sensors[i].priv = tmu;
 		tmu->sensors[i].tzd =
 			devm_thermal_of_zone_register(&pdev->dev, i,
 						      &tmu->sensors[i],
 						      &tmu_tz_ops);
 		if (IS_ERR(tmu->sensors[i].tzd)) {
 			ret = PTR_ERR(tmu->sensors[i].tzd);
 			dev_err(&pdev->dev,
 				"failed to register thermal zone sensor[%d]: %d\n",
 				i, ret);
 			goto disable_clk;
 		}
 		tmu->sensors[i].hw_id = i;

 		if (devm_thermal_add_hwmon_sysfs(&pdev->dev, tmu->sensors[i].tzd))
 			dev_warn(&pdev->dev, "failed to add hwmon sysfs attributes\n");
 	}

 	platform_set_drvdata(pdev, tmu);

 	ret = imx8mm_tmu_probe_set_calib(pdev, tmu);
 	if (ret)
 		goto disable_clk;

 	/* enable all the probes for V2 TMU */
 	if (tmu->socdata->version == TMU_VER2)
 		imx8mm_tmu_probe_sel_all(tmu);

 	/* enable the monitor */
 	imx8mm_tmu_enable(tmu, true);

 	return 0;

 disable_clk:
 	clk_disable_unprepare(tmu->clk);
 	return ret;
 }

 static int imx8mm_tmu_remove(struct platform_device *pdev)
 {
 	struct imx8mm_tmu *tmu = platform_get_drvdata(pdev);

 	/* disable TMU */
 	imx8mm_tmu_enable(tmu, false);

 	clk_disable_unprepare(tmu->clk);
 	platform_set_drvdata(pdev, NULL);

 	return 0;
 }

 static struct thermal_soc_data imx8mm_tmu_data = {
 	.num_sensors = 1,
 	.version = TMU_VER1,
 	.get_temp = imx8mm_tmu_get_temp,
 };

 static struct thermal_soc_data imx8mp_tmu_data = {
 	.num_sensors = 2,
 	.version = TMU_VER2,
 	.get_temp = imx8mp_tmu_get_temp,
 };

 static const struct of_device_id imx8mm_tmu_table[] = {
 	{ .compatible = "fsl,imx8mm-tmu", .data = &imx8mm_tmu_data, },
 	{ .compatible = "fsl,imx8mp-tmu", .data = &imx8mp_tmu_data, },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, imx8mm_tmu_table);

 static struct platform_driver imx8mm_tmu = {
 	.driver = {
 		.name	= "i.mx8mm_thermal",
 		.of_match_table = imx8mm_tmu_table,
 	},
 	.probe = imx8mm_tmu_probe,
 	.remove = imx8mm_tmu_remove,
 };
 module_platform_driver(imx8mm_tmu);

 MODULE_AUTHOR("Anson Huang <Anson.Huang@nxp.com>");
 MODULE_DESCRIPTION("i.MX8MM Thermal Monitor Unit driver");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright 2020 NXP.
	*
	* Author: Anson Huang <Anson.Huang@nxp.com>
	*/

	#include <linux/bitfield.h>
	#include <linux/clk.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/module.h>
	#include <linux/nvmem-consumer.h>
	#include <linux/of.h>
	#include <linux/of_device.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>
	#include <linux/thermal.h>

	#include "thermal_hwmon.h"

	#define TER 0x0 /* TMU enable */
	#define TPS 0x4
	#define TRITSR 0x20 /* TMU immediate temp */
	/* TMU calibration data registers */
	#define TASR 0x28
	#define TASR_BUF_SLOPE_MASK GENMASK(19, 16)
	#define TASR_BUF_VREF_MASK GENMASK(4, 0) /* TMU_V1 */
	#define TASR_BUF_VERF_SEL_MASK GENMASK(1, 0) /* TMU_V2 */
	#define TCALIV(n) (0x30 + ((n) * 4))
	#define TCALIV_EN BIT(31)
	#define TCALIV_HR_MASK GENMASK(23, 16) /* TMU_V1 */
	#define TCALIV_RT_MASK GENMASK(7, 0) /* TMU_V1 */
	#define TCALIV_SNSR105C_MASK GENMASK(27, 16) /* TMU_V2 */
	#define TCALIV_SNSR25C_MASK GENMASK(11, 0) /* TMU_V2 */
	#define TRIM 0x3c
	#define TRIM_BJT_CUR_MASK GENMASK(23, 20)
	#define TRIM_BGR_MASK GENMASK(31, 28)
	#define TRIM_VLSB_MASK GENMASK(15, 12)
	#define TRIM_EN_CH BIT(7)

	#define TER_ADC_PD BIT(30)
	#define TER_EN BIT(31)
	#define TRITSR_TEMP0_VAL_MASK GENMASK(7, 0)
	#define TRITSR_TEMP1_VAL_MASK GENMASK(23, 16)

	#define PROBE_SEL_ALL GENMASK(31, 30)

	#define probe_status_offset(x) (30 + x)
	#define SIGN_BIT BIT(7)
	#define TEMP_VAL_MASK GENMASK(6, 0)

	/* TMU OCOTP calibration data bitfields */
	#define ANA0_EN BIT(25)
	#define ANA0_BUF_VREF_MASK GENMASK(24, 20)
	#define ANA0_BUF_SLOPE_MASK GENMASK(19, 16)
	#define ANA0_HR_MASK GENMASK(15, 8)
	#define ANA0_RT_MASK GENMASK(7, 0)
	#define TRIM2_VLSB_MASK GENMASK(23, 20)
	#define TRIM2_BGR_MASK GENMASK(19, 16)
	#define TRIM2_BJT_CUR_MASK GENMASK(15, 12)
	#define TRIM2_BUF_SLOP_SEL_MASK GENMASK(11, 8)
	#define TRIM2_BUF_VERF_SEL_MASK GENMASK(7, 6)
	#define TRIM3_TCA25_0_LSB_MASK GENMASK(31, 28)
	#define TRIM3_TCA40_0_MASK GENMASK(27, 16)
	#define TRIM4_TCA40_1_MASK GENMASK(31, 20)
	#define TRIM4_TCA105_0_MASK GENMASK(19, 8)
	#define TRIM4_TCA25_0_MSB_MASK GENMASK(7, 0)
	#define TRIM5_TCA105_1_MASK GENMASK(23, 12)
	#define TRIM5_TCA25_1_MASK GENMASK(11, 0)

	#define VER1_TEMP_LOW_LIMIT 10000
	#define VER2_TEMP_LOW_LIMIT -40000
	#define VER2_TEMP_HIGH_LIMIT 125000

	#define TMU_VER1 0x1
	#define TMU_VER2 0x2

	struct thermal_soc_data {
	u32 num_sensors;
	u32 version;
	int (get_temp)(void , int *);
	};

	struct tmu_sensor {
	struct imx8mm_tmu *priv;
	u32 hw_id;
	struct thermal_zone_device *tzd;
	};

	struct imx8mm_tmu {
	void __iomem *base;
	struct clk *clk;
	const struct thermal_soc_data *socdata;
	struct tmu_sensor sensors[];
	};

	static int imx8mm_tmu_get_temp(void data, int temp)
	{
	struct tmu_sensor *sensor = data;
	struct imx8mm_tmu *tmu = sensor->priv;
	u32 val;

	val = readl_relaxed(tmu->base + TRITSR) & TRITSR_TEMP0_VAL_MASK;

	/*
	* Do not validate against the V bit (bit 31) due to errata
	* ERR051272: TMU: Bit 31 of registers TMU_TSCR/TMU_TRITSR/TMU_TRATSR invalid
	*/

	temp = val 1000;
	if (temp < VER1_TEMP_LOW_LIMIT \|\| temp > VER2_TEMP_HIGH_LIMIT)
	return -EAGAIN;

	return 0;
	}

	static int imx8mp_tmu_get_temp(void data, int temp)
	{
	struct tmu_sensor *sensor = data;
	struct imx8mm_tmu *tmu = sensor->priv;
	unsigned long val;
	bool ready;

	val = readl_relaxed(tmu->base + TRITSR);
	ready = test_bit(probe_status_offset(sensor->hw_id), &val);
	if (!ready)
	return -EAGAIN;

	val = sensor->hw_id ? FIELD_GET(TRITSR_TEMP1_VAL_MASK, val) :
	FIELD_GET(TRITSR_TEMP0_VAL_MASK, val);
	if (val & SIGN_BIT) /* negative */
	val = (~(val & TEMP_VAL_MASK) + 1);

	temp = val 1000;
	if (temp < VER2_TEMP_LOW_LIMIT \|\| temp > VER2_TEMP_HIGH_LIMIT)
	return -EAGAIN;

	return 0;
	}

	static int tmu_get_temp(struct thermal_zone_device tz, int temp)
	{
	struct tmu_sensor *sensor = thermal_zone_device_priv(tz);
	struct imx8mm_tmu *tmu = sensor->priv;

	return tmu->socdata->get_temp(sensor, temp);
	}

	static const struct thermal_zone_device_ops tmu_tz_ops = {
	.get_temp = tmu_get_temp,
	};

	static void imx8mm_tmu_enable(struct imx8mm_tmu *tmu, bool enable)
	{
	u32 val;

	val = readl_relaxed(tmu->base + TER);
	val = enable ? (val \| TER_EN) : (val & ~TER_EN);
	if (tmu->socdata->version == TMU_VER2)
	val = enable ? (val & ~TER_ADC_PD) : (val \| TER_ADC_PD);
	writel_relaxed(val, tmu->base + TER);
	}

	static void imx8mm_tmu_probe_sel_all(struct imx8mm_tmu *tmu)
	{
	u32 val;

	val = readl_relaxed(tmu->base + TPS);
	val \|= PROBE_SEL_ALL;
	writel_relaxed(val, tmu->base + TPS);
	}

	static int imx8mm_tmu_probe_set_calib_v1(struct platform_device *pdev,
	struct imx8mm_tmu *tmu)
	{
	struct device *dev = &pdev->dev;
	u32 ana0;
	int ret;

	ret = nvmem_cell_read_u32(&pdev->dev, "calib", &ana0);
	if (ret) {
	dev_warn(dev, "Failed to read OCOTP nvmem cell (%d).\n", ret);
	return ret;
	}

	writel(FIELD_PREP(TASR_BUF_VREF_MASK,
	FIELD_GET(ANA0_BUF_VREF_MASK, ana0)) \|
	FIELD_PREP(TASR_BUF_SLOPE_MASK,
	FIELD_GET(ANA0_BUF_SLOPE_MASK, ana0)),
	tmu->base + TASR);

	writel(FIELD_PREP(TCALIV_RT_MASK, FIELD_GET(ANA0_RT_MASK, ana0)) \|
	FIELD_PREP(TCALIV_HR_MASK, FIELD_GET(ANA0_HR_MASK, ana0)) \|
	((ana0 & ANA0_EN) ? TCALIV_EN : 0),
	tmu->base + TCALIV(0));

	return 0;
	}

	static int imx8mm_tmu_probe_set_calib_v2(struct platform_device *pdev,
	struct imx8mm_tmu *tmu)
	{
	struct device *dev = &pdev->dev;
	struct nvmem_cell *cell;
	u32 trim[4] = { 0 };
	size_t len;
	void *buf;

	cell = nvmem_cell_get(dev, "calib");
	if (IS_ERR(cell))
	return PTR_ERR(cell);

	buf = nvmem_cell_read(cell, &len);
	nvmem_cell_put(cell);

	if (IS_ERR(buf))
	return PTR_ERR(buf);

	memcpy(trim, buf, min(len, sizeof(trim)));
	kfree(buf);

	if (len != 16) {
	dev_err(dev,
	"OCOTP nvmem cell length is %zu, must be 16.\n", len);
	return -EINVAL;
	}

	/* Blank sample hardware */
	if (!trim[0] && !trim[1] && !trim[2] && !trim[3]) {
	/* Use a default 25C binary codes */
	writel(FIELD_PREP(TCALIV_SNSR25C_MASK, 0x63c),
	tmu->base + TCALIV(0));
	writel(FIELD_PREP(TCALIV_SNSR25C_MASK, 0x63c),
	tmu->base + TCALIV(1));
	return 0;
	}

	writel(FIELD_PREP(TASR_BUF_VERF_SEL_MASK,
	FIELD_GET(TRIM2_BUF_VERF_SEL_MASK, trim[0])) \|
	FIELD_PREP(TASR_BUF_SLOPE_MASK,
	FIELD_GET(TRIM2_BUF_SLOP_SEL_MASK, trim[0])),
	tmu->base + TASR);

	writel(FIELD_PREP(TRIM_BJT_CUR_MASK,
	FIELD_GET(TRIM2_BJT_CUR_MASK, trim[0])) \|
	FIELD_PREP(TRIM_BGR_MASK, FIELD_GET(TRIM2_BGR_MASK, trim[0])) \|
	FIELD_PREP(TRIM_VLSB_MASK, FIELD_GET(TRIM2_VLSB_MASK, trim[0])) \|
	TRIM_EN_CH,
	tmu->base + TRIM);

	writel(FIELD_PREP(TCALIV_SNSR25C_MASK,
	FIELD_GET(TRIM3_TCA25_0_LSB_MASK, trim[1]) \|
	(FIELD_GET(TRIM4_TCA25_0_MSB_MASK, trim[2]) << 4)) \|
	FIELD_PREP(TCALIV_SNSR105C_MASK,
	FIELD_GET(TRIM4_TCA105_0_MASK, trim[2])),
	tmu->base + TCALIV(0));

	writel(FIELD_PREP(TCALIV_SNSR25C_MASK,
	FIELD_GET(TRIM5_TCA25_1_MASK, trim[3])) \|
	FIELD_PREP(TCALIV_SNSR105C_MASK,
	FIELD_GET(TRIM5_TCA105_1_MASK, trim[3])),
	tmu->base + TCALIV(1));

	writel(FIELD_PREP(TCALIV_SNSR25C_MASK,
	FIELD_GET(TRIM3_TCA40_0_MASK, trim[1])) \|
	FIELD_PREP(TCALIV_SNSR105C_MASK,
	FIELD_GET(TRIM4_TCA40_1_MASK, trim[2])),
	tmu->base + TCALIV(2));

	return 0;
	}

	static int imx8mm_tmu_probe_set_calib(struct platform_device *pdev,
	struct imx8mm_tmu *tmu)
	{
	struct device *dev = &pdev->dev;

	/*
	* Lack of calibration data OCOTP reference is not considered
	* fatal to retain compatibility with old DTs. It is however
	* strongly recommended to update such old DTs to get correct
	* temperature compensation values for each SoC.
	*/
	if (!of_property_present(pdev->dev.of_node, "nvmem-cells")) {
	dev_warn(dev,
	"No OCOTP nvmem reference found, SoC-specific calibration not loaded. Please update your DT.\n");
	return 0;
	}

	if (tmu->socdata->version == TMU_VER1)
	return imx8mm_tmu_probe_set_calib_v1(pdev, tmu);

	return imx8mm_tmu_probe_set_calib_v2(pdev, tmu);
	}

	static int imx8mm_tmu_probe(struct platform_device *pdev)
	{
	const struct thermal_soc_data *data;
	struct imx8mm_tmu *tmu;
	int ret;
	int i;

	data = of_device_get_match_data(&pdev->dev);

	tmu = devm_kzalloc(&pdev->dev, struct_size(tmu, sensors,
	data->num_sensors), GFP_KERNEL);
	if (!tmu)
	return -ENOMEM;

	tmu->socdata = data;

	tmu->base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(tmu->base))
	return PTR_ERR(tmu->base);

	tmu->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(tmu->clk))
	return dev_err_probe(&pdev->dev, PTR_ERR(tmu->clk),
	"failed to get tmu clock\n");

	ret = clk_prepare_enable(tmu->clk);
	if (ret) {
	dev_err(&pdev->dev, "failed to enable tmu clock: %d\n", ret);
	return ret;
	}

	/* disable the monitor during initialization */
	imx8mm_tmu_enable(tmu, false);

	for (i = 0; i < data->num_sensors; i++) {
	tmu->sensors[i].priv = tmu;
	tmu->sensors[i].tzd =
	devm_thermal_of_zone_register(&pdev->dev, i,
	&tmu->sensors[i],
	&tmu_tz_ops);
	if (IS_ERR(tmu->sensors[i].tzd)) {
	ret = PTR_ERR(tmu->sensors[i].tzd);
	dev_err(&pdev->dev,
	"failed to register thermal zone sensor[%d]: %d\n",
	i, ret);
	goto disable_clk;
	}
	tmu->sensors[i].hw_id = i;

	if (devm_thermal_add_hwmon_sysfs(&pdev->dev, tmu->sensors[i].tzd))
	dev_warn(&pdev->dev, "failed to add hwmon sysfs attributes\n");
	}

	platform_set_drvdata(pdev, tmu);

	ret = imx8mm_tmu_probe_set_calib(pdev, tmu);
	if (ret)
	goto disable_clk;

	/* enable all the probes for V2 TMU */
	if (tmu->socdata->version == TMU_VER2)
	imx8mm_tmu_probe_sel_all(tmu);

	/* enable the monitor */
	imx8mm_tmu_enable(tmu, true);

	return 0;

	disable_clk:
	clk_disable_unprepare(tmu->clk);
	return ret;
	}

	static int imx8mm_tmu_remove(struct platform_device *pdev)
	{
	struct imx8mm_tmu *tmu = platform_get_drvdata(pdev);

	/* disable TMU */
	imx8mm_tmu_enable(tmu, false);

	clk_disable_unprepare(tmu->clk);
	platform_set_drvdata(pdev, NULL);

	return 0;
	}

	static struct thermal_soc_data imx8mm_tmu_data = {
	.num_sensors = 1,
	.version = TMU_VER1,
	.get_temp = imx8mm_tmu_get_temp,
	};

	static struct thermal_soc_data imx8mp_tmu_data = {
	.num_sensors = 2,
	.version = TMU_VER2,
	.get_temp = imx8mp_tmu_get_temp,
	};

	static const struct of_device_id imx8mm_tmu_table[] = {
	{ .compatible = "fsl,imx8mm-tmu", .data = &imx8mm_tmu_data, },
	{ .compatible = "fsl,imx8mp-tmu", .data = &imx8mp_tmu_data, },
	{ },
	};
	MODULE_DEVICE_TABLE(of, imx8mm_tmu_table);

	static struct platform_driver imx8mm_tmu = {
	.driver = {
	.name = "i.mx8mm_thermal",
	.of_match_table = imx8mm_tmu_table,
	},
	.probe = imx8mm_tmu_probe,
	.remove = imx8mm_tmu_remove,
	};
	module_platform_driver(imx8mm_tmu);

	MODULE_AUTHOR("Anson Huang <Anson.Huang@nxp.com>");
	MODULE_DESCRIPTION("i.MX8MM Thermal Monitor Unit driver");
	MODULE_LICENSE("GPL v2");