[linux-block.git] / drivers / hwmon / sch5627.c

// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
 *   Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com>           *
 *                                                                         *
 ***************************************************************************/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/bits.h>
#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/pm.h>
#include <linux/init.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include "sch56xx-common.h"

#define DRVNAME "sch5627"
#define DEVNAME DRVNAME /* We only support one model */

#define SCH5627_HWMON_ID		0xa5
#define SCH5627_COMPANY_ID		0x5c
#define SCH5627_PRIMARY_ID		0xa0

#define SCH5627_REG_BUILD_CODE		0x39
#define SCH5627_REG_BUILD_ID		0x3a
#define SCH5627_REG_HWMON_ID		0x3c
#define SCH5627_REG_HWMON_REV		0x3d
#define SCH5627_REG_COMPANY_ID		0x3e
#define SCH5627_REG_PRIMARY_ID		0x3f
#define SCH5627_REG_CTRL		0x40

#define SCH5627_CTRL_START		BIT(0)
#define SCH5627_CTRL_LOCK		BIT(1)
#define SCH5627_CTRL_VBAT		BIT(4)

#define SCH5627_NO_TEMPS		8
#define SCH5627_NO_FANS			4
#define SCH5627_NO_IN			5

static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
	0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
	0, 0, 1, 1, 0, 0, 0, 1 };
static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
	0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
	0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };

static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
	0x2C, 0x2E, 0x30, 0x32 };
static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
	0x62, 0x64, 0x66, 0x68 };

static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = {
	0xA0, 0xA1, 0xA2, 0xA3 };

static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
	0x22, 0x23, 0x24, 0x25, 0x189 };
static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
	0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
	1, 0, 1, 0, 1 };
static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
	10745, 3660, 9765, 10745, 3660 };
static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
	"VCC", "VTT", "VBAT", "VTR", "V_IN" };

struct sch5627_data {
	struct regmap *regmap;
	unsigned short addr;
	u8 control;

	struct mutex update_lock;
	unsigned long last_battery;	/* In jiffies */
	char temp_valid;		/* !=0 if following fields are valid */
	char fan_valid;
	char in_valid;
	unsigned long temp_last_updated;	/* In jiffies */
	unsigned long fan_last_updated;
	unsigned long in_last_updated;
	u16 temp[SCH5627_NO_TEMPS];
	u16 fan[SCH5627_NO_FANS];
	u16 in[SCH5627_NO_IN];
};

static const struct regmap_range sch5627_tunables_ranges[] = {
	regmap_reg_range(0x57, 0x57),
	regmap_reg_range(0x59, 0x59),
	regmap_reg_range(0x5B, 0x5B),
	regmap_reg_range(0x5D, 0x5D),
	regmap_reg_range(0x5F, 0x5F),
	regmap_reg_range(0x61, 0x69),
	regmap_reg_range(0x96, 0x9B),
	regmap_reg_range(0xA0, 0xA3),
	regmap_reg_range(0x184, 0x184),
	regmap_reg_range(0x186, 0x186),
	regmap_reg_range(0x1A8, 0x1A9),
};

static const struct regmap_access_table sch5627_tunables_table = {
	.yes_ranges = sch5627_tunables_ranges,
	.n_yes_ranges = ARRAY_SIZE(sch5627_tunables_ranges),
};

static const struct regmap_config sch5627_regmap_config = {
	.reg_bits = 16,
	.val_bits = 8,
	.wr_table = &sch5627_tunables_table,
	.rd_table = &sch5627_tunables_table,
	.cache_type = REGCACHE_RBTREE,
	.use_single_read = true,
	.use_single_write = true,
	.can_sleep = true,
};

static int sch5627_update_temp(struct sch5627_data *data)
{
	int ret = 0;
	int i, val;

	mutex_lock(&data->update_lock);

	/* Cache the values for 1 second */
	if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) {
		for (i = 0; i < SCH5627_NO_TEMPS; i++) {
			val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
							 SCH5627_REG_TEMP_LSN[i],
							 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
			if (unlikely(val < 0)) {
				ret = val;
				goto abort;
			}
			data->temp[i] = val;
		}
		data->temp_last_updated = jiffies;
		data->temp_valid = 1;
	}
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static int sch5627_update_fan(struct sch5627_data *data)
{
	int ret = 0;
	int i, val;

	mutex_lock(&data->update_lock);

	/* Cache the values for 1 second */
	if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) {
		for (i = 0; i < SCH5627_NO_FANS; i++) {
			val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
			if (unlikely(val < 0)) {
				ret = val;
				goto abort;
			}
			data->fan[i] = val;
		}
		data->fan_last_updated = jiffies;
		data->fan_valid = 1;
	}
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static int sch5627_update_in(struct sch5627_data *data)
{
	int ret = 0;
	int i, val;

	mutex_lock(&data->update_lock);

	/* Trigger a Vbat voltage measurement every 5 minutes */
	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
					  data->control | SCH5627_CTRL_VBAT);
		data->last_battery = jiffies;
	}

	/* Cache the values for 1 second */
	if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) {
		for (i = 0; i < SCH5627_NO_IN; i++) {
			val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
							 SCH5627_REG_IN_LSN[i],
							 SCH5627_REG_IN_HIGH_NIBBLE[i]);
			if (unlikely(val < 0)) {
				ret = val;
				goto abort;
			}
			data->in[i] = val;
		}
		data->in_last_updated = jiffies;
		data->in_valid = 1;
	}
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static int reg_to_temp(u16 reg)
{
	return (reg * 625) / 10 - 64000;
}

static int reg_to_temp_limit(u8 reg)
{
	return (reg - 64) * 1000;
}

static int reg_to_rpm(u16 reg)
{
	if (reg == 0)
		return -EIO;
	if (reg == 0xffff)
		return 0;

	return 5400540 / reg;
}

static u8 sch5627_temp_limit_to_reg(long value)
{
	long limit = (value / 1000) + 64;

	return clamp_val(limit, 0, U8_MAX);
}

static u16 sch5627_rpm_to_reg(long value)
{
	long pulses;

	if (value <= 0)
		return U16_MAX - 1;

	pulses = 5400540 / value;

	return clamp_val(pulses, 1, U16_MAX - 1);
}

static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
				  int channel)
{
	const struct sch5627_data *data = drvdata;

	/* Once the lock bit is set, the virtual registers become read-only
	 * until the next power cycle.
	 */
	if (data->control & SCH5627_CTRL_LOCK)
		return 0444;

	switch (type) {
	case hwmon_temp:
		switch (attr) {
		case hwmon_temp_max:
		case hwmon_temp_crit:
			return 0644;
		default:
			break;
		}
		break;
	case hwmon_fan:
		switch (attr) {
		case hwmon_fan_min:
			return 0644;
		default:
			break;
		}
		break;
	case hwmon_pwm:
		switch (attr) {
		case hwmon_pwm_auto_channels_temp:
			return 0644;
		default:
			break;
		}
		break;
	default:
		break;
	}

	return 0444;
}

static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
			long *val)
{
	struct sch5627_data *data = dev_get_drvdata(dev);
	int ret, value;

	switch (type) {
	case hwmon_temp:
		switch (attr) {
		case hwmon_temp_input:
			ret = sch5627_update_temp(data);
			if (ret < 0)
				return ret;

			*val = reg_to_temp(data->temp[channel]);
			return 0;
		case hwmon_temp_max:
			ret = regmap_read(data->regmap, SCH5627_REG_TEMP_ABS[channel], &value);
			if (ret < 0)
				return ret;

			*val = reg_to_temp_limit((u8)value);
			return 0;
		case hwmon_temp_crit:
			ret = regmap_read(data->regmap, SCH5627_REG_TEMP_HIGH[channel], &value);
			if (ret < 0)
				return ret;

			*val = reg_to_temp_limit((u8)value);
			return 0;
		case hwmon_temp_fault:
			ret = sch5627_update_temp(data);
			if (ret < 0)
				return ret;

			*val = (data->temp[channel] == 0);
			return 0;
		default:
			break;
		}
		break;
	case hwmon_fan:
		switch (attr) {
		case hwmon_fan_input:
			ret = sch5627_update_fan(data);
			if (ret < 0)
				return ret;

			ret = reg_to_rpm(data->fan[channel]);
			if (ret < 0)
				return ret;

			*val = ret;
			return 0;
		case hwmon_fan_min:
			ret = sch56xx_regmap_read16(data->regmap, SCH5627_REG_FAN_MIN[channel],
						    &value);
			if (ret < 0)
				return ret;

			ret = reg_to_rpm((u16)value);
			if (ret < 0)
				return ret;

			*val = ret;
			return 0;
		case hwmon_fan_fault:
			ret = sch5627_update_fan(data);
			if (ret < 0)
				return ret;

			*val = (data->fan[channel] == 0xffff);
			return 0;
		default:
			break;
		}
		break;
	case hwmon_pwm:
		switch (attr) {
		case hwmon_pwm_auto_channels_temp:
			ret = regmap_read(data->regmap, SCH5627_REG_PWM_MAP[channel], &value);
			if (ret < 0)
				return ret;

			*val = value;
			return 0;
		default:
			break;
		}
		break;
	case hwmon_in:
		ret = sch5627_update_in(data);
		if (ret < 0)
			return ret;
		switch (attr) {
		case hwmon_in_input:
			*val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel],
						 10000);
			return 0;
		default:
			break;
		}
		break;
	default:
		break;
	}

	return -EOPNOTSUPP;
}

static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
			       int channel, const char **str)
{
	switch (type) {
	case hwmon_in:
		switch (attr) {
		case hwmon_in_label:
			*str = SCH5627_IN_LABELS[channel];
			return 0;
		default:
			break;
		}
		break;
	default:
		break;
	}

	return -EOPNOTSUPP;
}

static int sch5627_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
			 long val)
{
	struct sch5627_data *data = dev_get_drvdata(dev);
	u16 fan;
	u8 temp;

	switch (type) {
	case hwmon_temp:
		temp = sch5627_temp_limit_to_reg(val);

		switch (attr) {
		case hwmon_temp_max:
			return regmap_write(data->regmap, SCH5627_REG_TEMP_ABS[channel], temp);
		case hwmon_temp_crit:
			return regmap_write(data->regmap, SCH5627_REG_TEMP_HIGH[channel], temp);
		default:
			break;
		}
		break;
	case hwmon_fan:
		switch (attr) {
		case hwmon_fan_min:
			fan = sch5627_rpm_to_reg(val);

			return sch56xx_regmap_write16(data->regmap, SCH5627_REG_FAN_MIN[channel],
						      fan);
		default:
			break;
		}
		break;
	case hwmon_pwm:
		switch (attr) {
		case hwmon_pwm_auto_channels_temp:
			/* registers are 8 bit wide */
			if (val > U8_MAX || val < 0)
				return -EINVAL;

			return regmap_write(data->regmap, SCH5627_REG_PWM_MAP[channel], val);
		default:
			break;
		}
		break;
	default:
		break;
	}

	return -EOPNOTSUPP;
}

static const struct hwmon_ops sch5627_ops = {
	.is_visible = sch5627_is_visible,
	.read = sch5627_read,
	.read_string = sch5627_read_string,
	.write = sch5627_write,
};

static const struct hwmon_channel_info * const sch5627_info[] = {
	HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
	HWMON_CHANNEL_INFO(temp,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT
			   ),
	HWMON_CHANNEL_INFO(fan,
			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT
			   ),
	HWMON_CHANNEL_INFO(pwm,
			   HWMON_PWM_AUTO_CHANNELS_TEMP,
			   HWMON_PWM_AUTO_CHANNELS_TEMP,
			   HWMON_PWM_AUTO_CHANNELS_TEMP,
			   HWMON_PWM_AUTO_CHANNELS_TEMP
			   ),
	HWMON_CHANNEL_INFO(in,
			   HWMON_I_INPUT | HWMON_I_LABEL,
			   HWMON_I_INPUT | HWMON_I_LABEL,
			   HWMON_I_INPUT | HWMON_I_LABEL,
			   HWMON_I_INPUT | HWMON_I_LABEL,
			   HWMON_I_INPUT
			   ),
	NULL
};

static const struct hwmon_chip_info sch5627_chip_info = {
	.ops = &sch5627_ops,
	.info = sch5627_info,
};

static int sch5627_probe(struct platform_device *pdev)
{
	struct sch5627_data *data;
	struct device *hwmon_dev;
	int build_code, build_id, hwmon_rev, val;

	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	mutex_init(&data->update_lock);
	platform_set_drvdata(pdev, data);

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
	if (val < 0)
		return val;

	if (val != SCH5627_HWMON_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
		       val, SCH5627_HWMON_ID);
		return -ENODEV;
	}

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
	if (val < 0)
		return val;

	if (val != SCH5627_COMPANY_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
		       val, SCH5627_COMPANY_ID);
		return -ENODEV;
	}

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
	if (val < 0)
		return val;

	if (val != SCH5627_PRIMARY_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
		       val, SCH5627_PRIMARY_ID);
		return -ENODEV;
	}

	build_code = sch56xx_read_virtual_reg(data->addr,
					      SCH5627_REG_BUILD_CODE);
	if (build_code < 0)
		return build_code;

	build_id = sch56xx_read_virtual_reg16(data->addr,
					      SCH5627_REG_BUILD_ID);
	if (build_id < 0)
		return build_id;

	hwmon_rev = sch56xx_read_virtual_reg(data->addr,
					     SCH5627_REG_HWMON_REV);
	if (hwmon_rev < 0)
		return hwmon_rev;

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
	if (val < 0)
		return val;

	data->control = val;
	if (!(data->control & SCH5627_CTRL_START)) {
		pr_err("hardware monitoring not enabled\n");
		return -ENODEV;
	}

	data->regmap = devm_regmap_init_sch56xx(&pdev->dev, &data->update_lock, data->addr,
						&sch5627_regmap_config);
	if (IS_ERR(data->regmap))
		return PTR_ERR(data->regmap);

	/* Trigger a Vbat voltage measurement, so that we get a valid reading
	   the first time we read Vbat */
	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | SCH5627_CTRL_VBAT);
	data->last_battery = jiffies;

	pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
	pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
		build_code, build_id, hwmon_rev);

	hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
							 &sch5627_chip_info, NULL);
	if (IS_ERR(hwmon_dev))
		return PTR_ERR(hwmon_dev);

	/* Note failing to register the watchdog is not a fatal error */
	sch56xx_watchdog_register(&pdev->dev, data->addr,
				  (build_code << 24) | (build_id << 8) | hwmon_rev,
				  &data->update_lock, 1);

	return 0;
}

static int sch5627_suspend(struct device *dev)
{
	struct sch5627_data *data = dev_get_drvdata(dev);

	regcache_cache_only(data->regmap, true);
	regcache_mark_dirty(data->regmap);

	return 0;
}

static int sch5627_resume(struct device *dev)
{
	struct sch5627_data *data = dev_get_drvdata(dev);

	regcache_cache_only(data->regmap, false);
	/* We must not access the virtual registers when the lock bit is set */
	if (data->control & SCH5627_CTRL_LOCK)
		return regcache_drop_region(data->regmap, 0, U16_MAX);

	return regcache_sync(data->regmap);
}

static DEFINE_SIMPLE_DEV_PM_OPS(sch5627_dev_pm_ops, sch5627_suspend, sch5627_resume);

static const struct platform_device_id sch5627_device_id[] = {
	{
		.name = "sch5627",
	},
	{ }
};
MODULE_DEVICE_TABLE(platform, sch5627_device_id);

static struct platform_driver sch5627_driver = {
	.driver = {
		.name	= DRVNAME,
		.pm	= pm_sleep_ptr(&sch5627_dev_pm_ops),
	},
	.probe		= sch5627_probe,
	.id_table	= sch5627_device_id,
};

module_platform_driver(sch5627_driver);

MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
a98d506c	2	/***************************************************************************
312869ec	3	* Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> *
a98d506c	4	* *
a98d506c HG	5	***************************************************************************/
	6
	7	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	8
7f0b28e0	9	#include <linux/bits.h>
10655bb6	10	#include <linux/minmax.h>
a98d506c	11	#include <linux/module.h>
4db3c092	12	#include <linux/mod_devicetable.h>
a54fe616	13	#include <linux/pm.h>
a98d506c	14	#include <linux/init.h>
a54fe616	15	#include <linux/regmap.h>
a98d506c HG	16	#include <linux/slab.h>
	17	#include <linux/jiffies.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/hwmon.h>
a98d506c HG	20	#include <linux/err.h>
a98d506c HG	21	#include <linux/mutex.h>
28ff2f7a	22	#include "sch56xx-common.h"
a98d506c HG	23
	24	#define DRVNAME "sch5627"
	25	#define DEVNAME DRVNAME /* We only support one model */
	26
a98d506c HG	27	#define SCH5627_HWMON_ID 0xa5
	28	#define SCH5627_COMPANY_ID 0x5c
	29	#define SCH5627_PRIMARY_ID 0xa0
	30
	31	#define SCH5627_REG_BUILD_CODE 0x39
	32	#define SCH5627_REG_BUILD_ID 0x3a
	33	#define SCH5627_REG_HWMON_ID 0x3c
	34	#define SCH5627_REG_HWMON_REV 0x3d
	35	#define SCH5627_REG_COMPANY_ID 0x3e
	36	#define SCH5627_REG_PRIMARY_ID 0x3f
	37	#define SCH5627_REG_CTRL 0x40
	38
7f0b28e0	39	#define SCH5627_CTRL_START BIT(0)
7da8a635	40	#define SCH5627_CTRL_LOCK BIT(1)
7f0b28e0 AW	41	#define SCH5627_CTRL_VBAT BIT(4)
7f0b28e0 AW	42
a98d506c HG	43	#define SCH5627_NO_TEMPS 8
	44	#define SCH5627_NO_FANS 4
	45	#define SCH5627_NO_IN 5
	46
	47	static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
	48	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
	49	static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
	50	0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
	51	static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
	52	0, 0, 1, 1, 0, 0, 0, 1 };
	53	static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
	54	0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
	55	static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
	56	0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
	57
	58	static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
	59	0x2C, 0x2E, 0x30, 0x32 };
	60	static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
	61	0x62, 0x64, 0x66, 0x68 };
	62
aa9f833d AW	63	static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = {
	64	0xA0, 0xA1, 0xA2, 0xA3 };
	65
a98d506c HG	66	static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
	67	0x22, 0x23, 0x24, 0x25, 0x189 };
	68	static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
	69	0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
	70	static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
	71	1, 0, 1, 0, 1 };
	72	static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
	73	10745, 3660, 9765, 10745, 3660 };
	74	static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
	75	"VCC", "VTT", "VBAT", "VTR", "V_IN" };
	76
	77	struct sch5627_data {
a54fe616	78	struct regmap *regmap;
a98d506c	79	unsigned short addr;
357b9dc6	80	u8 control;
a98d506c HG	81
a98d506c HG	82	struct mutex update_lock;
357b9dc6	83	unsigned long last_battery; /* In jiffies */
790ac8fa AW	84	char temp_valid; /* !=0 if following fields are valid */
	85	char fan_valid;
	86	char in_valid;
	87	unsigned long temp_last_updated; /* In jiffies */
	88	unsigned long fan_last_updated;
	89	unsigned long in_last_updated;
a98d506c HG	90	u16 temp[SCH5627_NO_TEMPS];
	91	u16 fan[SCH5627_NO_FANS];
	92	u16 in[SCH5627_NO_IN];
	93	};
	94
a54fe616	95	static const struct regmap_range sch5627_tunables_ranges[] = {
10655bb6 AW	96	regmap_reg_range(0x57, 0x57),
	97	regmap_reg_range(0x59, 0x59),
	98	regmap_reg_range(0x5B, 0x5B),
	99	regmap_reg_range(0x5D, 0x5D),
	100	regmap_reg_range(0x5F, 0x5F),
	101	regmap_reg_range(0x61, 0x69),
	102	regmap_reg_range(0x96, 0x9B),
a54fe616	103	regmap_reg_range(0xA0, 0xA3),
10655bb6 AW	104	regmap_reg_range(0x184, 0x184),
	105	regmap_reg_range(0x186, 0x186),
	106	regmap_reg_range(0x1A8, 0x1A9),
a54fe616 AW	107	};
	108
	109	static const struct regmap_access_table sch5627_tunables_table = {
	110	.yes_ranges = sch5627_tunables_ranges,
	111	.n_yes_ranges = ARRAY_SIZE(sch5627_tunables_ranges),
	112	};
	113
	114	static const struct regmap_config sch5627_regmap_config = {
	115	.reg_bits = 16,
	116	.val_bits = 8,
	117	.wr_table = &sch5627_tunables_table,
	118	.rd_table = &sch5627_tunables_table,
	119	.cache_type = REGCACHE_RBTREE,
	120	.use_single_read = true,
	121	.use_single_write = true,
	122	.can_sleep = true,
	123	};
	124
790ac8fa	125	static int sch5627_update_temp(struct sch5627_data *data)
a98d506c	126	{
790ac8fa	127	int ret = 0;
a98d506c HG	128	int i, val;
	129
	130	mutex_lock(&data->update_lock);
	131
	132	/* Cache the values for 1 second */
790ac8fa	133	if (time_after(jiffies, data->temp_last_updated + HZ) \|\| !data->temp_valid) {
a98d506c	134	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
790ac8fa AW	135	val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
	136	SCH5627_REG_TEMP_LSN[i],
	137	SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
a98d506c	138	if (unlikely(val < 0)) {
790ac8fa	139	ret = val;
a98d506c HG	140	goto abort;
	141	}
	142	data->temp[i] = val;
	143	}
790ac8fa AW	144	data->temp_last_updated = jiffies;
	145	data->temp_valid = 1;
	146	}
	147	abort:
	148	mutex_unlock(&data->update_lock);
	149	return ret;
	150	}
	151
	152	static int sch5627_update_fan(struct sch5627_data *data)
	153	{
	154	int ret = 0;
	155	int i, val;
a98d506c	156
790ac8fa AW	157	mutex_lock(&data->update_lock);
	158
	159	/* Cache the values for 1 second */
	160	if (time_after(jiffies, data->fan_last_updated + HZ) \|\| !data->fan_valid) {
a98d506c	161	for (i = 0; i < SCH5627_NO_FANS; i++) {
790ac8fa	162	val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
a98d506c	163	if (unlikely(val < 0)) {
790ac8fa	164	ret = val;
a98d506c HG	165	goto abort;
	166	}
	167	data->fan[i] = val;
	168	}
790ac8fa AW	169	data->fan_last_updated = jiffies;
	170	data->fan_valid = 1;
	171	}
	172	abort:
	173	mutex_unlock(&data->update_lock);
	174	return ret;
	175	}
	176
	177	static int sch5627_update_in(struct sch5627_data *data)
	178	{
	179	int ret = 0;
	180	int i, val;
	181
	182	mutex_lock(&data->update_lock);
a98d506c	183
790ac8fa AW	184	/* Trigger a Vbat voltage measurement every 5 minutes */
790ac8fa AW	185	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
7f0b28e0 AW	186	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
7f0b28e0 AW	187	data->control \| SCH5627_CTRL_VBAT);
790ac8fa AW	188	data->last_battery = jiffies;
	189	}
	190
	191	/* Cache the values for 1 second */
	192	if (time_after(jiffies, data->in_last_updated + HZ) \|\| !data->in_valid) {
a98d506c	193	for (i = 0; i < SCH5627_NO_IN; i++) {
790ac8fa AW	194	val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
	195	SCH5627_REG_IN_LSN[i],
	196	SCH5627_REG_IN_HIGH_NIBBLE[i]);
a98d506c	197	if (unlikely(val < 0)) {
790ac8fa	198	ret = val;
a98d506c HG	199	goto abort;
	200	}
	201	data->in[i] = val;
	202	}
790ac8fa AW	203	data->in_last_updated = jiffies;
790ac8fa AW	204	data->in_valid = 1;
a98d506c HG	205	}
	206	abort:
	207	mutex_unlock(&data->update_lock);
	208	return ret;
	209	}
	210
a98d506c HG	211	static int reg_to_temp(u16 reg)
	212	{
	213	return (reg * 625) / 10 - 64000;
	214	}
	215
	216	static int reg_to_temp_limit(u8 reg)
	217	{
	218	return (reg - 64) * 1000;
	219	}
	220
	221	static int reg_to_rpm(u16 reg)
	222	{
	223	if (reg == 0)
	224	return -EIO;
	225	if (reg == 0xffff)
	226	return 0;
	227
	228	return 5400540 / reg;
	229	}
	230
10655bb6 AW	231	static u8 sch5627_temp_limit_to_reg(long value)
	232	{
	233	long limit = (value / 1000) + 64;
	234
	235	return clamp_val(limit, 0, U8_MAX);
	236	}
	237
	238	static u16 sch5627_rpm_to_reg(long value)
	239	{
	240	long pulses;
	241
	242	if (value <= 0)
	243	return U16_MAX - 1;
	244
	245	pulses = 5400540 / value;
	246
	247	return clamp_val(pulses, 1, U16_MAX - 1);
	248	}
	249
e7e0b466 AW	250	static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
e7e0b466 AW	251	int channel)
a98d506c	252	{
7da8a635 AW	253	const struct sch5627_data *data = drvdata;
	254
	255	/* Once the lock bit is set, the virtual registers become read-only
	256	* until the next power cycle.
	257	*/
	258	if (data->control & SCH5627_CTRL_LOCK)
	259	return 0444;
	260
10655bb6 AW	261	switch (type) {
	262	case hwmon_temp:
	263	switch (attr) {
	264	case hwmon_temp_max:
	265	case hwmon_temp_crit:
	266	return 0644;
	267	default:
	268	break;
	269	}
	270	break;
	271	case hwmon_fan:
	272	switch (attr) {
	273	case hwmon_fan_min:
	274	return 0644;
	275	default:
	276	break;
	277	}
	278	break;
	279	case hwmon_pwm:
	280	switch (attr) {
	281	case hwmon_pwm_auto_channels_temp:
	282	return 0644;
	283	default:
	284	break;
	285	}
	286	break;
	287	default:
	288	break;
	289	}
aa9f833d	290
e7e0b466	291	return 0444;
a98d506c HG	292	}
a98d506c HG	293
e7e0b466 AW	294	static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
e7e0b466 AW	295	long *val)
a98d506c	296	{
790ac8fa	297	struct sch5627_data *data = dev_get_drvdata(dev);
a54fe616	298	int ret, value;
a98d506c	299
e7e0b466 AW	300	switch (type) {
	301	case hwmon_temp:
	302	switch (attr) {
	303	case hwmon_temp_input:
10655bb6 AW	304	ret = sch5627_update_temp(data);
	305	if (ret < 0)
	306	return ret;
	307
e7e0b466 AW	308	*val = reg_to_temp(data->temp[channel]);
	309	return 0;
	310	case hwmon_temp_max:
10655bb6 AW	311	ret = regmap_read(data->regmap, SCH5627_REG_TEMP_ABS[channel], &value);
	312	if (ret < 0)
	313	return ret;
	314
	315	*val = reg_to_temp_limit((u8)value);
e7e0b466 AW	316	return 0;
e7e0b466 AW	317	case hwmon_temp_crit:
10655bb6 AW	318	ret = regmap_read(data->regmap, SCH5627_REG_TEMP_HIGH[channel], &value);
	319	if (ret < 0)
	320	return ret;
	321
	322	*val = reg_to_temp_limit((u8)value);
e7e0b466 AW	323	return 0;
e7e0b466 AW	324	case hwmon_temp_fault:
10655bb6 AW	325	ret = sch5627_update_temp(data);
	326	if (ret < 0)
	327	return ret;
	328
e7e0b466 AW	329	*val = (data->temp[channel] == 0);
	330	return 0;
	331	default:
	332	break;
	333	}
	334	break;
	335	case hwmon_fan:
	336	switch (attr) {
	337	case hwmon_fan_input:
10655bb6 AW	338	ret = sch5627_update_fan(data);
	339	if (ret < 0)
	340	return ret;
	341
e7e0b466 AW	342	ret = reg_to_rpm(data->fan[channel]);
	343	if (ret < 0)
	344	return ret;
10655bb6	345
e7e0b466 AW	346	*val = ret;
	347	return 0;
	348	case hwmon_fan_min:
10655bb6 AW	349	ret = sch56xx_regmap_read16(data->regmap, SCH5627_REG_FAN_MIN[channel],
10655bb6 AW	350	&value);
e7e0b466 AW	351	if (ret < 0)
e7e0b466 AW	352	return ret;
10655bb6 AW	353
	354	ret = reg_to_rpm((u16)value);
	355	if (ret < 0)
	356	return ret;
	357
e7e0b466 AW	358	*val = ret;
	359	return 0;
	360	case hwmon_fan_fault:
10655bb6 AW	361	ret = sch5627_update_fan(data);
	362	if (ret < 0)
	363	return ret;
	364
e7e0b466 AW	365	*val = (data->fan[channel] == 0xffff);
	366	return 0;
	367	default:
	368	break;
	369	}
	370	break;
aa9f833d AW	371	case hwmon_pwm:
	372	switch (attr) {
	373	case hwmon_pwm_auto_channels_temp:
a54fe616	374	ret = regmap_read(data->regmap, SCH5627_REG_PWM_MAP[channel], &value);
aa9f833d AW	375	if (ret < 0)
	376	return ret;
	377
a54fe616	378	*val = value;
aa9f833d AW	379	return 0;
	380	default:
	381	break;
	382	}
	383	break;
e7e0b466	384	case hwmon_in:
790ac8fa AW	385	ret = sch5627_update_in(data);
	386	if (ret < 0)
	387	return ret;
e7e0b466 AW	388	switch (attr) {
	389	case hwmon_in_input:
	390	val = DIV_ROUND_CLOSEST(data->in[channel] SCH5627_REG_IN_FACTOR[channel],
	391	10000);
	392	return 0;
	393	default:
	394	break;
	395	}
	396	break;
	397	default:
	398	break;
	399	}
a98d506c	400
e7e0b466	401	return -EOPNOTSUPP;
a98d506c HG	402	}
a98d506c HG	403
e7e0b466 AW	404	static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
e7e0b466 AW	405	int channel, const char **str)
a98d506c	406	{
e7e0b466 AW	407	switch (type) {
	408	case hwmon_in:
	409	switch (attr) {
	410	case hwmon_in_label:
	411	*str = SCH5627_IN_LABELS[channel];
	412	return 0;
	413	default:
	414	break;
	415	}
	416	break;
	417	default:
	418	break;
	419	}
a98d506c	420
e7e0b466	421	return -EOPNOTSUPP;
a98d506c HG	422	}
a98d506c HG	423
aa9f833d AW	424	static int sch5627_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
	425	long val)
	426	{
	427	struct sch5627_data *data = dev_get_drvdata(dev);
10655bb6 AW	428	u16 fan;
10655bb6 AW	429	u8 temp;
aa9f833d AW	430
aa9f833d AW	431	switch (type) {
10655bb6 AW	432	case hwmon_temp:
	433	temp = sch5627_temp_limit_to_reg(val);
	434
	435	switch (attr) {
	436	case hwmon_temp_max:
	437	return regmap_write(data->regmap, SCH5627_REG_TEMP_ABS[channel], temp);
	438	case hwmon_temp_crit:
	439	return regmap_write(data->regmap, SCH5627_REG_TEMP_HIGH[channel], temp);
	440	default:
	441	break;
	442	}
	443	break;
	444	case hwmon_fan:
	445	switch (attr) {
	446	case hwmon_fan_min:
	447	fan = sch5627_rpm_to_reg(val);
	448
	449	return sch56xx_regmap_write16(data->regmap, SCH5627_REG_FAN_MIN[channel],
	450	fan);
	451	default:
	452	break;
	453	}
	454	break;
aa9f833d AW	455	case hwmon_pwm:
	456	switch (attr) {
	457	case hwmon_pwm_auto_channels_temp:
	458	/* registers are 8 bit wide */
	459	if (val > U8_MAX \|\| val < 0)
	460	return -EINVAL;
	461
a54fe616	462	return regmap_write(data->regmap, SCH5627_REG_PWM_MAP[channel], val);
aa9f833d AW	463	default:
	464	break;
	465	}
	466	break;
	467	default:
	468	break;
	469	}
	470
	471	return -EOPNOTSUPP;
	472	}
	473
e7e0b466 AW	474	static const struct hwmon_ops sch5627_ops = {
	475	.is_visible = sch5627_is_visible,
	476	.read = sch5627_read,
	477	.read_string = sch5627_read_string,
aa9f833d	478	.write = sch5627_write,
e7e0b466	479	};
a98d506c	480
1ff3d23d	481	static const struct hwmon_channel_info * const sch5627_info[] = {
e7e0b466 AW	482	HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
	483	HWMON_CHANNEL_INFO(temp,
	484	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	485	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	486	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	487	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	488	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	489	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	490	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	491	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT
	492	),
	493	HWMON_CHANNEL_INFO(fan,
	494	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	495	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	496	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	497	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT
	498	),
aa9f833d AW	499	HWMON_CHANNEL_INFO(pwm,
	500	HWMON_PWM_AUTO_CHANNELS_TEMP,
	501	HWMON_PWM_AUTO_CHANNELS_TEMP,
	502	HWMON_PWM_AUTO_CHANNELS_TEMP,
	503	HWMON_PWM_AUTO_CHANNELS_TEMP
	504	),
e7e0b466 AW	505	HWMON_CHANNEL_INFO(in,
	506	HWMON_I_INPUT \| HWMON_I_LABEL,
	507	HWMON_I_INPUT \| HWMON_I_LABEL,
	508	HWMON_I_INPUT \| HWMON_I_LABEL,
	509	HWMON_I_INPUT \| HWMON_I_LABEL,
	510	HWMON_I_INPUT
	511	),
a98d506c HG	512	NULL
	513	};
	514
e7e0b466 AW	515	static const struct hwmon_chip_info sch5627_chip_info = {
	516	.ops = &sch5627_ops,
	517	.info = sch5627_info,
a98d506c HG	518	};
a98d506c HG	519
6c931ae1	520	static int sch5627_probe(struct platform_device *pdev)
a98d506c HG	521	{
a98d506c HG	522	struct sch5627_data *data;
93a6fb2c	523	struct device *hwmon_dev;
10655bb6	524	int build_code, build_id, hwmon_rev, val;
a98d506c	525
bd8d8e08 GR	526	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
bd8d8e08 GR	527	GFP_KERNEL);
a98d506c HG	528	if (!data)
	529	return -ENOMEM;
	530
	531	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	532	mutex_init(&data->update_lock);
	533	platform_set_drvdata(pdev, data);
	534
28ff2f7a	535	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
bab10bf9 AW	536	if (val < 0)
	537	return val;
	538
a98d506c HG	539	if (val != SCH5627_HWMON_ID) {
	540	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
	541	val, SCH5627_HWMON_ID);
bab10bf9	542	return -ENODEV;
a98d506c HG	543	}
a98d506c HG	544
28ff2f7a	545	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
bab10bf9 AW	546	if (val < 0)
	547	return val;
	548
a98d506c HG	549	if (val != SCH5627_COMPANY_ID) {
	550	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
	551	val, SCH5627_COMPANY_ID);
bab10bf9	552	return -ENODEV;
a98d506c HG	553	}
a98d506c HG	554
28ff2f7a	555	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
bab10bf9 AW	556	if (val < 0)
	557	return val;
	558
a98d506c HG	559	if (val != SCH5627_PRIMARY_ID) {
	560	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
	561	val, SCH5627_PRIMARY_ID);
bab10bf9	562	return -ENODEV;
a98d506c HG	563	}
a98d506c HG	564
28ff2f7a HG	565	build_code = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	566	SCH5627_REG_BUILD_CODE);
bab10bf9 AW	567	if (build_code < 0)
bab10bf9 AW	568	return build_code;
a98d506c	569
28ff2f7a HG	570	build_id = sch56xx_read_virtual_reg16(data->addr,
28ff2f7a HG	571	SCH5627_REG_BUILD_ID);
bab10bf9 AW	572	if (build_id < 0)
bab10bf9 AW	573	return build_id;
a98d506c	574
28ff2f7a HG	575	hwmon_rev = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	576	SCH5627_REG_HWMON_REV);
bab10bf9 AW	577	if (hwmon_rev < 0)
bab10bf9 AW	578	return hwmon_rev;
a98d506c	579
28ff2f7a	580	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
bab10bf9 AW	581	if (val < 0)
	582	return val;
	583
357b9dc6	584	data->control = val;
7f0b28e0	585	if (!(data->control & SCH5627_CTRL_START)) {
a98d506c	586	pr_err("hardware monitoring not enabled\n");
bab10bf9	587	return -ENODEV;
a98d506c	588	}
a54fe616 AW	589
	590	data->regmap = devm_regmap_init_sch56xx(&pdev->dev, &data->update_lock, data->addr,
	591	&sch5627_regmap_config);
	592	if (IS_ERR(data->regmap))
	593	return PTR_ERR(data->regmap);
	594
357b9dc6 HG	595	/* Trigger a Vbat voltage measurement, so that we get a valid reading
357b9dc6 HG	596	the first time we read Vbat */
7f0b28e0	597	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control \| SCH5627_CTRL_VBAT);
357b9dc6	598	data->last_battery = jiffies;
a98d506c	599
28ff2f7a	600	pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
a98d506c HG	601	pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
	602	build_code, build_id, hwmon_rev);
	603
93a6fb2c AW	604	hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
93a6fb2c AW	605	&sch5627_chip_info, NULL);
bab10bf9 AW	606	if (IS_ERR(hwmon_dev))
bab10bf9 AW	607	return PTR_ERR(hwmon_dev);
a98d506c	608
312869ec	609	/* Note failing to register the watchdog is not a fatal error */
2be5f0d7 AW	610	sch56xx_watchdog_register(&pdev->dev, data->addr,
	611	(build_code << 24) \| (build_id << 8) \| hwmon_rev,
	612	&data->update_lock, 1);
312869ec	613
a98d506c	614	return 0;
a98d506c HG	615	}
a98d506c HG	616
a54fe616 AW	617	static int sch5627_suspend(struct device *dev)
	618	{
	619	struct sch5627_data *data = dev_get_drvdata(dev);
	620
	621	regcache_cache_only(data->regmap, true);
	622	regcache_mark_dirty(data->regmap);
	623
	624	return 0;
	625	}
	626
	627	static int sch5627_resume(struct device *dev)
	628	{
	629	struct sch5627_data *data = dev_get_drvdata(dev);
	630
	631	regcache_cache_only(data->regmap, false);
	632	/* We must not access the virtual registers when the lock bit is set */
	633	if (data->control & SCH5627_CTRL_LOCK)
	634	return regcache_drop_region(data->regmap, 0, U16_MAX);
	635
	636	return regcache_sync(data->regmap);
	637	}
	638
	639	static DEFINE_SIMPLE_DEV_PM_OPS(sch5627_dev_pm_ops, sch5627_suspend, sch5627_resume);
	640
4db3c092 AW	641	static const struct platform_device_id sch5627_device_id[] = {
	642	{
	643	.name = "sch5627",
	644	},
	645	{ }
	646	};
	647	MODULE_DEVICE_TABLE(platform, sch5627_device_id);
	648
a98d506c HG	649	static struct platform_driver sch5627_driver = {
a98d506c HG	650	.driver = {
a98d506c	651	.name = DRVNAME,
a54fe616	652	.pm = pm_sleep_ptr(&sch5627_dev_pm_ops),
a98d506c HG	653	},
a98d506c HG	654	.probe = sch5627_probe,
4db3c092	655	.id_table = sch5627_device_id,
a98d506c HG	656	};
a98d506c HG	657
25a236a5	658	module_platform_driver(sch5627_driver);
a98d506c HG	659
a98d506c HG	660	MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
7958e3b4	661	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
a98d506c	662	MODULE_LICENSE("GPL");