[linux.git] / drivers / thermal / qoriq_thermal.c

// SPDX-License-Identifier: GPL-2.0
//
// Copyright 2016 Freescale Semiconductor, Inc.

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/sizes.h>
#include <linux/thermal.h>
#include <linux/units.h>

#include "thermal_hwmon.h"

#define SITES_MAX		16
#define TMR_DISABLE		0x0
#define TMR_ME			0x80000000
#define TMR_ALPF		0x0c000000
#define TMR_ALPF_V2		0x03000000
#define TMTMIR_DEFAULT	0x0000000f
#define TIER_DISABLE	0x0
#define TEUMR0_V2		0x51009c00
#define TMSARA_V2		0xe
#define TMU_VER1		0x1
#define TMU_VER2		0x2

#define REGS_TMR	0x000	/* Mode Register */
#define TMR_DISABLE	0x0
#define TMR_ME		0x80000000
#define TMR_ALPF	0x0c000000

#define REGS_TMTMIR	0x008	/* Temperature measurement interval Register */
#define TMTMIR_DEFAULT	0x0000000f

#define REGS_V2_TMSR	0x008	/* monitor site register */

#define REGS_V2_TMTMIR	0x00c	/* Temperature measurement interval Register */

#define REGS_TIER	0x020	/* Interrupt Enable Register */
#define TIER_DISABLE	0x0


#define REGS_TTCFGR	0x080	/* Temperature Configuration Register */
#define REGS_TSCFGR	0x084	/* Sensor Configuration Register */

#define REGS_TRITSR(n)	(0x100 + 16 * (n)) /* Immediate Temperature
					    * 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
						*/
#define REGS_TTRnCR(n)	(0xf10 + 4 * (n)) /* Temperature Range n
					   * Control Register
					   */
#define REGS_IPBRR(n)		(0xbf8 + 4 * (n)) /* IP Block Revision
						   * Register n
						   */
#define REGS_V2_TEUMR(n)	(0xf00 + 4 * (n))

/*
 * Thermal zone data
 */
struct qoriq_sensor {
	int				id;
};

struct qoriq_tmu_data {
	int ver;
	struct regmap *regmap;
	struct clk *clk;
	struct qoriq_sensor	sensor[SITES_MAX];
};

static struct qoriq_tmu_data *qoriq_sensor_to_data(struct qoriq_sensor *s)
{
	return container_of(s, struct qoriq_tmu_data, sensor[s->id]);
}

static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
{
	struct qoriq_sensor *qsensor = thermal_zone_device_priv(tz);
	struct qoriq_tmu_data *qdata = qoriq_sensor_to_data(qsensor);
	u32 val;
	/*
	 * REGS_TRITSR(id) has the following layout:
	 *
	 * For TMU Rev1:
	 * 31  ... 7 6 5 4 3 2 1 0
	 *  V          TEMP
	 *
	 * Where V bit signifies if the measurement is ready and is
	 * within sensor range. TEMP is an 8 bit value representing
	 * temperature in Celsius.

	 * For TMU Rev2:
	 * 31  ... 8 7 6 5 4 3 2 1 0
	 *  V          TEMP
	 *
	 * Where V bit signifies if the measurement is ready and is
	 * within sensor range. TEMP is an 9 bit value representing
	 * temperature in KelVin.
	 */

	regmap_read(qdata->regmap, REGS_TMR, &val);
	if (!(val & TMR_ME))
		return -EAGAIN;

	if (regmap_read_poll_timeout(qdata->regmap,
				     REGS_TRITSR(qsensor->id),
				     val,
				     val & TRITSR_V,
				     USEC_PER_MSEC,
				     10 * USEC_PER_MSEC))
		return -ENODATA;

	if (qdata->ver == TMU_VER1) {
		*temp = (val & GENMASK(7, 0)) * MILLIDEGREE_PER_DEGREE;
	} else {
		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));
	}

	return 0;
}

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

static int qoriq_tmu_register_tmu_zone(struct device *dev,
				       struct qoriq_tmu_data *qdata)
{
	int id, sites = 0;

	for (id = 0; id < SITES_MAX; id++) {
		struct thermal_zone_device *tzd;
		struct qoriq_sensor *sensor = &qdata->sensor[id];
		int ret;

		sensor->id = id;

		tzd = devm_thermal_of_zone_register(dev, id,
						    sensor,
						    &tmu_tz_ops);
		ret = PTR_ERR_OR_ZERO(tzd);
		if (ret) {
			if (ret == -ENODEV)
				continue;

			return ret;
		}

		if (qdata->ver == TMU_VER1)
			sites |= 0x1 << (15 - id);
		else
			sites |= 0x1 << id;

		devm_thermal_add_hwmon_sysfs(dev, tzd);
	}

	if (sites) {
		if (qdata->ver == TMU_VER1) {
			regmap_write(qdata->regmap, REGS_TMR, TMR_ME | TMR_ALPF | sites);
		} else {
			regmap_write(qdata->regmap, REGS_V2_TMSR, sites);
			regmap_write(qdata->regmap, REGS_TMR, TMR_ME | TMR_ALPF_V2);
		}
	}

	return 0;
}

static int qoriq_tmu_calibration(struct device *dev,
				 struct qoriq_tmu_data *data)
{
	int i, val, len;
	u32 range[4];
	const u32 *calibration;
	struct device_node *np = dev->of_node;

	len = of_property_count_u32_elems(np, "fsl,tmu-range");
	if (len < 0 || len > 4) {
		dev_err(dev, "invalid range data.\n");
		return len;
	}

	val = of_property_read_u32_array(np, "fsl,tmu-range", range, len);
	if (val != 0) {
		dev_err(dev, "failed to read range data.\n");
		return val;
	}

	/* Init temperature range registers */
	for (i = 0; i < len; i++)
		regmap_write(data->regmap, REGS_TTRnCR(i), range[i]);

	calibration = of_get_property(np, "fsl,tmu-calibration", &len);
	if (calibration == NULL || len % 8) {
		dev_err(dev, "invalid calibration data.\n");
		return -ENODEV;
	}

	for (i = 0; i < len; i += 8, calibration += 2) {
		val = of_read_number(calibration, 1);
		regmap_write(data->regmap, REGS_TTCFGR, val);
		val = of_read_number(calibration + 1, 1);
		regmap_write(data->regmap, REGS_TSCFGR, val);
	}

	return 0;
}

static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
{
	/* Disable interrupt, using polling instead */
	regmap_write(data->regmap, REGS_TIER, TIER_DISABLE);

	/* Set update_interval */

	if (data->ver == TMU_VER1) {
		regmap_write(data->regmap, REGS_TMTMIR, TMTMIR_DEFAULT);
	} else {
		regmap_write(data->regmap, REGS_V2_TMTMIR, TMTMIR_DEFAULT);
		regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
	}

	/* Disable monitoring */
	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
}

static const struct regmap_range qoriq_yes_ranges[] = {
	regmap_reg_range(REGS_TMR, REGS_TSCFGR),
	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)),
	/* Read only registers below */
	regmap_reg_range(REGS_TRITSR(0), REGS_TRITSR(15)),
};

static const struct regmap_access_table qoriq_wr_table = {
	.yes_ranges	= qoriq_yes_ranges,
	.n_yes_ranges	= ARRAY_SIZE(qoriq_yes_ranges) - 1,
};

static const struct regmap_access_table qoriq_rd_table = {
	.yes_ranges	= qoriq_yes_ranges,
	.n_yes_ranges	= ARRAY_SIZE(qoriq_yes_ranges),
};

static void qoriq_tmu_action(void *p)
{
	struct qoriq_tmu_data *data = p;

	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
	clk_disable_unprepare(data->clk);
}

static int qoriq_tmu_probe(struct platform_device *pdev)
{
	int ret;
	u32 ver;
	struct qoriq_tmu_data *data;
	struct device_node *np = pdev->dev.of_node;
	struct device *dev = &pdev->dev;
	const bool little_endian = of_property_read_bool(np, "little-endian");
	const enum regmap_endian format_endian =
		little_endian ? REGMAP_ENDIAN_LITTLE : REGMAP_ENDIAN_BIG;
	const struct regmap_config regmap_config = {
		.reg_bits		= 32,
		.val_bits		= 32,
		.reg_stride		= 4,
		.rd_table		= &qoriq_rd_table,
		.wr_table		= &qoriq_wr_table,
		.val_format_endian	= format_endian,
		.max_register		= SZ_4K,
	};
	void __iomem *base;

	data = devm_kzalloc(dev, sizeof(struct qoriq_tmu_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	base = devm_platform_ioremap_resource(pdev, 0);
	ret = PTR_ERR_OR_ZERO(base);
	if (ret) {
		dev_err(dev, "Failed to get memory region\n");
		return ret;
	}

	data->regmap = devm_regmap_init_mmio(dev, base, &regmap_config);
	ret = PTR_ERR_OR_ZERO(data->regmap);
	if (ret) {
		dev_err(dev, "Failed to init regmap (%d)\n", ret);
		return ret;
	}

	data->clk = devm_clk_get_optional(dev, NULL);
	if (IS_ERR(data->clk))
		return PTR_ERR(data->clk);

	ret = clk_prepare_enable(data->clk);
	if (ret) {
		dev_err(dev, "Failed to enable clock\n");
		return ret;
	}

	ret = devm_add_action_or_reset(dev, qoriq_tmu_action, data);
	if (ret)
		return ret;

	/* version register offset at: 0xbf8 on both v1 and v2 */
	ret = regmap_read(data->regmap, REGS_IPBRR(0), &ver);
	if (ret) {
		dev_err(&pdev->dev, "Failed to read IP block version\n");
		return ret;
	}
	data->ver = (ver >> 8) & 0xff;

	qoriq_tmu_init_device(data);	/* TMU initialization */

	ret = qoriq_tmu_calibration(dev, data);	/* TMU calibration */
	if (ret < 0)
		return ret;

	ret = qoriq_tmu_register_tmu_zone(dev, data);
	if (ret < 0) {
		dev_err(dev, "Failed to register sensors\n");
		return ret;
	}

	platform_set_drvdata(pdev, data);

	return 0;
}

static int __maybe_unused qoriq_tmu_suspend(struct device *dev)
{
	struct qoriq_tmu_data *data = dev_get_drvdata(dev);
	int ret;

	ret = regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, 0);
	if (ret)
		return ret;

	clk_disable_unprepare(data->clk);

	return 0;
}

static int __maybe_unused qoriq_tmu_resume(struct device *dev)
{
	int ret;
	struct qoriq_tmu_data *data = dev_get_drvdata(dev);

	ret = clk_prepare_enable(data->clk);
	if (ret)
		return ret;

	/* Enable monitoring */
	return regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, TMR_ME);
}

static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
			 qoriq_tmu_suspend, qoriq_tmu_resume);

static const struct of_device_id qoriq_tmu_match[] = {
	{ .compatible = "fsl,qoriq-tmu", },
	{ .compatible = "fsl,imx8mq-tmu", },
	{},
};
MODULE_DEVICE_TABLE(of, qoriq_tmu_match);

static struct platform_driver qoriq_tmu = {
	.driver	= {
		.name		= "qoriq_thermal",
		.pm		= &qoriq_tmu_pm_ops,
		.of_match_table	= qoriq_tmu_match,
	},
	.probe	= qoriq_tmu_probe,
};
module_platform_driver(qoriq_tmu);

MODULE_AUTHOR("Jia Hongtao <[email protected]>");
MODULE_DESCRIPTION("QorIQ Thermal Monitoring Unit driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
2dfef650 FE	1	// SPDX-License-Identifier: GPL-2.0
	2	//
	3	// Copyright 2016 Freescale Semiconductor, Inc.
43528445	4
51904045	5	#include <linux/clk.h>
43528445 JH	6	#include <linux/err.h>
43528445 JH	7	#include <linux/io.h>
ce68eeca	8	#include <linux/module.h>
43528445	9	#include <linux/of.h>
ce68eeca	10	#include <linux/platform_device.h>
4316237b AS	11	#include <linux/regmap.h>
4316237b AS	12	#include <linux/sizes.h>
43528445	13	#include <linux/thermal.h>
47fa116e	14	#include <linux/units.h>
43528445	15
fd843309	16	#include "thermal_hwmon.h"
43528445	17
9809797b YT	18	#define SITES_MAX 16
	19	#define TMR_DISABLE 0x0
	20	#define TMR_ME 0x80000000
	21	#define TMR_ALPF 0x0c000000
	22	#define TMR_ALPF_V2 0x03000000
	23	#define TMTMIR_DEFAULT 0x0000000f
	24	#define TIER_DISABLE 0x0
	25	#define TEUMR0_V2 0x51009c00
47fa116e	26	#define TMSARA_V2 0xe
9809797b YT	27	#define TMU_VER1 0x1
9809797b YT	28	#define TMU_VER2 0x2
43528445	29
4316237b AS	30	#define REGS_TMR 0x000 /* Mode Register */
	31	#define TMR_DISABLE 0x0
	32	#define TMR_ME 0x80000000
	33	#define TMR_ALPF 0x0c000000
43528445	34
4316237b AS	35	#define REGS_TMTMIR 0x008 /* Temperature measurement interval Register */
4316237b AS	36	#define TMTMIR_DEFAULT 0x0000000f
9809797b	37
4316237b AS	38	#define REGS_V2_TMSR 0x008 /* monitor site register */
	39
	40	#define REGS_V2_TMTMIR 0x00c /* Temperature measurement interval Register */
	41
	42	#define REGS_TIER 0x020 /* Interrupt Enable Register */
	43	#define TIER_DISABLE 0x0
	44
	45
	46	#define REGS_TTCFGR 0x080 /* Temperature Configuration Register */
	47	#define REGS_TSCFGR 0x084 /* Sensor Configuration Register */
	48
	49	#define REGS_TRITSR(n) (0x100 + 16 * (n)) /* Immediate Temperature
	50	* Site Register
	51	*/
36564d7e	52	#define TRITSR_V BIT(31)
f12d60c8	53	#define TRITSR_TP5 BIT(9)
47fa116e YT	54	#define REGS_V2_TMSAR(n) (0x304 + 16 * (n)) /* TMU monitoring
	55	* site adjustment register
	56	*/
4316237b AS	57	#define REGS_TTRnCR(n) (0xf10 + 4 * (n)) /* Temperature Range n
	58	* Control Register
	59	*/
	60	#define REGS_IPBRR(n) (0xbf8 + 4 * (n)) /* IP Block Revision
	61	* Register n
	62	*/
	63	#define REGS_V2_TEUMR(n) (0xf00 + 4 * (n))
43528445 JH	64
	65	/*
	66	* Thermal zone data
	67	*/
7797ff42	68	struct qoriq_sensor {
7797ff42 YT	69	int id;
	70	};
	71
43528445	72	struct qoriq_tmu_data {
9809797b	73	int ver;
4316237b	74	struct regmap *regmap;
51904045	75	struct clk *clk;
b319da1b	76	struct qoriq_sensor sensor[SITES_MAX];
43528445 JH	77	};
43528445 JH	78
b319da1b AS	79	static struct qoriq_tmu_data qoriq_sensor_to_data(struct qoriq_sensor s)
	80	{
	81	return container_of(s, struct qoriq_tmu_data, sensor[s->id]);
	82	}
	83
3e7494b4	84	static int tmu_get_temp(struct thermal_zone_device tz, int temp)
43528445	85	{
5f68d078	86	struct qoriq_sensor *qsensor = thermal_zone_device_priv(tz);
b319da1b	87	struct qoriq_tmu_data *qdata = qoriq_sensor_to_data(qsensor);
43528445	88	u32 val;
36564d7e AS	89	/*
	90	* REGS_TRITSR(id) has the following layout:
	91	*
47fa116e	92	* For TMU Rev1:
36564d7e AS	93	* 31 ... 7 6 5 4 3 2 1 0
	94	* V TEMP
	95	*
	96	* Where V bit signifies if the measurement is ready and is
	97	* within sensor range. TEMP is an 8 bit value representing
47fa116e YT	98	* temperature in Celsius.
	99
	100	* For TMU Rev2:
	101	* 31 ... 8 7 6 5 4 3 2 1 0
	102	* V TEMP
	103	*
	104	* Where V bit signifies if the measurement is ready and is
	105	* within sensor range. TEMP is an 9 bit value representing
	106	* temperature in KelVin.
36564d7e	107	*/
9301575d PF	108
	109	regmap_read(qdata->regmap, REGS_TMR, &val);
	110	if (!(val & TMR_ME))
	111	return -EAGAIN;
	112
36564d7e AS	113	if (regmap_read_poll_timeout(qdata->regmap,
	114	REGS_TRITSR(qsensor->id),
	115	val,
	116	val & TRITSR_V,
	117	USEC_PER_MSEC,
	118	10 * USEC_PER_MSEC))
	119	return -ENODATA;
43528445	120
f12d60c8	121	if (qdata->ver == TMU_VER1) {
47fa116e	122	temp = (val & GENMASK(7, 0)) MILLIDEGREE_PER_DEGREE;
f12d60c8 PF	123	} else {
	124	if (val & TRITSR_TP5)
	125	temp = milli_kelvin_to_millicelsius((val & GENMASK(8, 0))
	126	MILLIDEGREE_PER_DEGREE + 500);
	127	else
	128	*temp = kelvin_to_millicelsius(val & GENMASK(8, 0));
	129	}
43528445 JH	130
	131	return 0;
	132	}
	133
3e7494b4	134	static const struct thermal_zone_device_ops tmu_tz_ops = {
7797ff42 YT	135	.get_temp = tmu_get_temp,
7797ff42 YT	136	};
43528445	137
03036625 AS	138	static int qoriq_tmu_register_tmu_zone(struct device *dev,
03036625 AS	139	struct qoriq_tmu_data *qdata)
7797ff42	140	{
9301575d	141	int id, sites = 0;
7797ff42 YT	142
7797ff42 YT	143	for (id = 0; id < SITES_MAX; id++) {
11ef00f7	144	struct thermal_zone_device *tzd;
b319da1b	145	struct qoriq_sensor *sensor = &qdata->sensor[id];
11ef00f7 AS	146	int ret;
11ef00f7 AS	147
d6fb0564	148	sensor->id = id;
11ef00f7	149
3e7494b4 DL	150	tzd = devm_thermal_of_zone_register(dev, id,
	151	sensor,
	152	&tmu_tz_ops);
11ef00f7 AS	153	ret = PTR_ERR_OR_ZERO(tzd);
	154	if (ret) {
	155	if (ret == -ENODEV)
7797ff42	156	continue;
43528445	157
45038e03	158	return ret;
9809797b	159	}
fd843309	160
9301575d PF	161	if (qdata->ver == TMU_VER1)
	162	sites \|= 0x1 << (15 - id);
	163	else
	164	sites \|= 0x1 << id;
	165
f13582a4	166	devm_thermal_add_hwmon_sysfs(dev, tzd);
9301575d	167	}
fd843309	168
9301575d PF	169	if (sites) {
	170	if (qdata->ver == TMU_VER1) {
	171	regmap_write(qdata->regmap, REGS_TMR, TMR_ME \| TMR_ALPF \| sites);
	172	} else {
	173	regmap_write(qdata->regmap, REGS_V2_TMSR, sites);
	174	regmap_write(qdata->regmap, REGS_TMR, TMR_ME \| TMR_ALPF_V2);
	175	}
9809797b	176	}
43528445	177
7797ff42	178	return 0;
43528445 JH	179	}
43528445 JH	180
8e1cda35 AS	181	static int qoriq_tmu_calibration(struct device *dev,
8e1cda35 AS	182	struct qoriq_tmu_data *data)
43528445 JH	183	{
	184	int i, val, len;
	185	u32 range[4];
	186	const u32 *calibration;
8e1cda35	187	struct device_node *np = dev->of_node;
43528445	188
9809797b YT	189	len = of_property_count_u32_elems(np, "fsl,tmu-range");
9809797b YT	190	if (len < 0 \|\| len > 4) {
8e1cda35	191	dev_err(dev, "invalid range data.\n");
9809797b YT	192	return len;
	193	}
	194
	195	val = of_property_read_u32_array(np, "fsl,tmu-range", range, len);
	196	if (val != 0) {
8e1cda35	197	dev_err(dev, "failed to read range data.\n");
9809797b	198	return val;
43528445 JH	199	}
	200
	201	/* Init temperature range registers */
9809797b	202	for (i = 0; i < len; i++)
4316237b	203	regmap_write(data->regmap, REGS_TTRnCR(i), range[i]);
43528445 JH	204
	205	calibration = of_get_property(np, "fsl,tmu-calibration", &len);
	206	if (calibration == NULL \|\| len % 8) {
8e1cda35	207	dev_err(dev, "invalid calibration data.\n");
43528445 JH	208	return -ENODEV;
	209	}
	210
	211	for (i = 0; i < len; i += 8, calibration += 2) {
	212	val = of_read_number(calibration, 1);
4316237b	213	regmap_write(data->regmap, REGS_TTCFGR, val);
43528445	214	val = of_read_number(calibration + 1, 1);
4316237b	215	regmap_write(data->regmap, REGS_TSCFGR, val);
43528445 JH	216	}
	217
	218	return 0;
	219	}
	220
	221	static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
	222	{
	223	/* Disable interrupt, using polling instead */
4316237b	224	regmap_write(data->regmap, REGS_TIER, TIER_DISABLE);
43528445 JH	225
43528445 JH	226	/* Set update_interval */
4316237b	227
9809797b	228	if (data->ver == TMU_VER1) {
4316237b	229	regmap_write(data->regmap, REGS_TMTMIR, TMTMIR_DEFAULT);
9809797b	230	} else {
4316237b AS	231	regmap_write(data->regmap, REGS_V2_TMTMIR, TMTMIR_DEFAULT);
4316237b AS	232	regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
9809797b	233	}
43528445 JH	234
43528445 JH	235	/* Disable monitoring */
4316237b	236	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
43528445 JH	237	}
43528445 JH	238
4316237b AS	239	static const struct regmap_range qoriq_yes_ranges[] = {
4316237b AS	240	regmap_reg_range(REGS_TMR, REGS_TSCFGR),
f12d60c8	241	regmap_reg_range(REGS_TTRnCR(0), REGS_TTRnCR(15)),
4316237b	242	regmap_reg_range(REGS_V2_TEUMR(0), REGS_V2_TEUMR(2)),
47fa116e	243	regmap_reg_range(REGS_V2_TMSAR(0), REGS_V2_TMSAR(15)),
4316237b AS	244	regmap_reg_range(REGS_IPBRR(0), REGS_IPBRR(1)),
	245	/* Read only registers below */
	246	regmap_reg_range(REGS_TRITSR(0), REGS_TRITSR(15)),
	247	};
	248
	249	static const struct regmap_access_table qoriq_wr_table = {
	250	.yes_ranges = qoriq_yes_ranges,
	251	.n_yes_ranges = ARRAY_SIZE(qoriq_yes_ranges) - 1,
	252	};
	253
	254	static const struct regmap_access_table qoriq_rd_table = {
	255	.yes_ranges = qoriq_yes_ranges,
	256	.n_yes_ranges = ARRAY_SIZE(qoriq_yes_ranges),
	257	};
	258
85f0b61a AH	259	static void qoriq_tmu_action(void *p)
	260	{
	261	struct qoriq_tmu_data *data = p;
	262
	263	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
	264	clk_disable_unprepare(data->clk);
	265	}
	266
43528445 JH	267	static int qoriq_tmu_probe(struct platform_device *pdev)
	268	{
	269	int ret;
9809797b	270	u32 ver;
43528445 JH	271	struct qoriq_tmu_data *data;
43528445 JH	272	struct device_node *np = pdev->dev.of_node;
e167dc43	273	struct device *dev = &pdev->dev;
4316237b AS	274	const bool little_endian = of_property_read_bool(np, "little-endian");
	275	const enum regmap_endian format_endian =
	276	little_endian ? REGMAP_ENDIAN_LITTLE : REGMAP_ENDIAN_BIG;
	277	const struct regmap_config regmap_config = {
	278	.reg_bits = 32,
	279	.val_bits = 32,
	280	.reg_stride = 4,
	281	.rd_table = &qoriq_rd_table,
	282	.wr_table = &qoriq_wr_table,
	283	.val_format_endian = format_endian,
	284	.max_register = SZ_4K,
	285	};
	286	void __iomem *base;
43528445	287
e167dc43	288	data = devm_kzalloc(dev, sizeof(struct qoriq_tmu_data),
43528445 JH	289	GFP_KERNEL);
	290	if (!data)
	291	return -ENOMEM;
	292
4316237b AS	293	base = devm_platform_ioremap_resource(pdev, 0);
	294	ret = PTR_ERR_OR_ZERO(base);
	295	if (ret) {
e167dc43	296	dev_err(dev, "Failed to get memory region\n");
4316237b AS	297	return ret;
	298	}
	299
	300	data->regmap = devm_regmap_init_mmio(dev, base, &regmap_config);
	301	ret = PTR_ERR_OR_ZERO(data->regmap);
	302	if (ret) {
	303	dev_err(dev, "Failed to init regmap (%d)\n", ret);
	304	return ret;
43528445 JH	305	}
43528445 JH	306
e167dc43	307	data->clk = devm_clk_get_optional(dev, NULL);
51904045 AH	308	if (IS_ERR(data->clk))
	309	return PTR_ERR(data->clk);
	310
	311	ret = clk_prepare_enable(data->clk);
	312	if (ret) {
e167dc43	313	dev_err(dev, "Failed to enable clock\n");
51904045 AH	314	return ret;
	315	}
	316
85f0b61a AH	317	ret = devm_add_action_or_reset(dev, qoriq_tmu_action, data);
	318	if (ret)
	319	return ret;
	320
9809797b	321	/* version register offset at: 0xbf8 on both v1 and v2 */
4316237b AS	322	ret = regmap_read(data->regmap, REGS_IPBRR(0), &ver);
	323	if (ret) {
	324	dev_err(&pdev->dev, "Failed to read IP block version\n");
	325	return ret;
	326	}
9809797b	327	data->ver = (ver >> 8) & 0xff;
9809797b	328
43528445 JH	329	qoriq_tmu_init_device(data); /* TMU initialization */
43528445 JH	330
8e1cda35	331	ret = qoriq_tmu_calibration(dev, data); /* TMU calibration */
43528445	332	if (ret < 0)
85f0b61a	333	return ret;
43528445	334
03036625	335	ret = qoriq_tmu_register_tmu_zone(dev, data);
7797ff42	336	if (ret < 0) {
e167dc43	337	dev_err(dev, "Failed to register sensors\n");
85f0b61a	338	return ret;
43528445 JH	339	}
43528445 JH	340
8e1cda35 AS	341	platform_set_drvdata(pdev, data);
8e1cda35 AS	342
43528445 JH	343	return 0;
	344	}
	345
aea59197	346	static int __maybe_unused qoriq_tmu_suspend(struct device *dev)
43528445	347	{
43528445	348	struct qoriq_tmu_data *data = dev_get_drvdata(dev);
4316237b	349	int ret;
43528445	350
4316237b AS	351	ret = regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, 0);
	352	if (ret)
	353	return ret;
43528445	354
51904045 AH	355	clk_disable_unprepare(data->clk);
51904045 AH	356
43528445 JH	357	return 0;
	358	}
	359
aea59197	360	static int __maybe_unused qoriq_tmu_resume(struct device *dev)
43528445	361	{
51904045	362	int ret;
43528445 JH	363	struct qoriq_tmu_data *data = dev_get_drvdata(dev);
43528445 JH	364
51904045 AH	365	ret = clk_prepare_enable(data->clk);
	366	if (ret)
	367	return ret;
	368
43528445	369	/* Enable monitoring */
4316237b	370	return regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, TMR_ME);
43528445	371	}
43528445 JH	372
	373	static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
	374	qoriq_tmu_suspend, qoriq_tmu_resume);
	375
	376	static const struct of_device_id qoriq_tmu_match[] = {
	377	{ .compatible = "fsl,qoriq-tmu", },
6017e2a9	378	{ .compatible = "fsl,imx8mq-tmu", },
43528445 JH	379	{},
	380	};
	381	MODULE_DEVICE_TABLE(of, qoriq_tmu_match);
	382
	383	static struct platform_driver qoriq_tmu = {
	384	.driver = {
	385	.name = "qoriq_thermal",
	386	.pm = &qoriq_tmu_pm_ops,
	387	.of_match_table = qoriq_tmu_match,
	388	},
	389	.probe = qoriq_tmu_probe,
43528445 JH	390	};
	391	module_platform_driver(qoriq_tmu);
	392
	393	MODULE_AUTHOR("Jia Hongtao <[email protected]>");
	394	MODULE_DESCRIPTION("QorIQ Thermal Monitoring Unit driver");
	395	MODULE_LICENSE("GPL v2");