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

// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
 *   Copyright (C) 2010-2012 Hans de Goede <[email protected]>           *
 *                                                                         *
 ***************************************************************************/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.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_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_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 {
	unsigned short addr;
	struct device *hwmon_dev;
	struct sch56xx_watchdog_data *watchdog;
	u8 control;
	u8 temp_max[SCH5627_NO_TEMPS];
	u8 temp_crit[SCH5627_NO_TEMPS];
	u16 fan_min[SCH5627_NO_FANS];

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

static struct sch5627_data *sch5627_update_device(struct device *dev)
{
	struct sch5627_data *data = dev_get_drvdata(dev);
	struct sch5627_data *ret = data;
	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 | 0x10);
		data->last_battery = jiffies;
	}

	/* Cache the values for 1 second */
	if (time_after(jiffies, data->last_updated + HZ) || !data->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 = ERR_PTR(val);
				goto abort;
			}
			data->temp[i] = val;
		}

		for (i = 0; i < SCH5627_NO_FANS; i++) {
			val = sch56xx_read_virtual_reg16(data->addr,
							 SCH5627_REG_FAN[i]);
			if (unlikely(val < 0)) {
				ret = ERR_PTR(val);
				goto abort;
			}
			data->fan[i] = val;
		}

		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 = ERR_PTR(val);
				goto abort;
			}
			data->in[i] = val;
		}

		data->last_updated = jiffies;
		data->valid = 1;
	}
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static int sch5627_read_limits(struct sch5627_data *data)
{
	int i, val;

	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
		/*
		 * Note what SMSC calls ABS, is what lm_sensors calls max
		 * (aka high), and HIGH is what lm_sensors calls crit.
		 */
		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5627_REG_TEMP_ABS[i]);
		if (val < 0)
			return val;
		data->temp_max[i] = val;

		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5627_REG_TEMP_HIGH[i]);
		if (val < 0)
			return val;
		data->temp_crit[i] = val;
	}
	for (i = 0; i < SCH5627_NO_FANS; i++) {
		val = sch56xx_read_virtual_reg16(data->addr,
						 SCH5627_REG_FAN_MIN[i]);
		if (val < 0)
			return val;
		data->fan_min[i] = val;
	}

	return 0;
}

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 ssize_t name_show(struct device *dev, struct device_attribute *devattr,
	char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
}

static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
			 char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5627_data *data = sch5627_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = reg_to_temp(data->temp[attr->index]);
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t temp_fault_show(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5627_data *data = sch5627_update_device(dev);

	if (IS_ERR(data))
		return PTR_ERR(data);

	return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
}

static ssize_t temp_max_show(struct device *dev,
			     struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5627_data *data = dev_get_drvdata(dev);
	int val;

	val = reg_to_temp_limit(data->temp_max[attr->index]);
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t temp_crit_show(struct device *dev,
			      struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5627_data *data = dev_get_drvdata(dev);
	int val;

	val = reg_to_temp_limit(data->temp_crit[attr->index]);
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
			char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5627_data *data = sch5627_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = reg_to_rpm(data->fan[attr->index]);
	if (val < 0)
		return val;

	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t fan_fault_show(struct device *dev,
			      struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5627_data *data = sch5627_update_device(dev);

	if (IS_ERR(data))
		return PTR_ERR(data);

	return snprintf(buf, PAGE_SIZE, "%d\n",
			data->fan[attr->index] == 0xffff);
}

static ssize_t fan_min_show(struct device *dev,
			    struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5627_data *data = dev_get_drvdata(dev);
	int val = reg_to_rpm(data->fan_min[attr->index]);
	if (val < 0)
		return val;

	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t in_show(struct device *dev, struct device_attribute *devattr,
		       char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5627_data *data = sch5627_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = DIV_ROUND_CLOSEST(
		data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
		10000);
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t in_label_show(struct device *dev,
			     struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

	return snprintf(buf, PAGE_SIZE, "%s\n",
			SCH5627_IN_LABELS[attr->index]);
}

static DEVICE_ATTR_RO(name);
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
static SENSOR_DEVICE_ATTR_RO(temp1_max, temp_max, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_max, temp_max, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_max, temp_max, 2);
static SENSOR_DEVICE_ATTR_RO(temp4_max, temp_max, 3);
static SENSOR_DEVICE_ATTR_RO(temp5_max, temp_max, 4);
static SENSOR_DEVICE_ATTR_RO(temp6_max, temp_max, 5);
static SENSOR_DEVICE_ATTR_RO(temp7_max, temp_max, 6);
static SENSOR_DEVICE_ATTR_RO(temp8_max, temp_max, 7);
static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_crit, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_crit, 2);
static SENSOR_DEVICE_ATTR_RO(temp4_crit, temp_crit, 3);
static SENSOR_DEVICE_ATTR_RO(temp5_crit, temp_crit, 4);
static SENSOR_DEVICE_ATTR_RO(temp6_crit, temp_crit, 5);
static SENSOR_DEVICE_ATTR_RO(temp7_crit, temp_crit, 6);
static SENSOR_DEVICE_ATTR_RO(temp8_crit, temp_crit, 7);

static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan_fault, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_fault, fan_fault, 1);
static SENSOR_DEVICE_ATTR_RO(fan3_fault, fan_fault, 2);
static SENSOR_DEVICE_ATTR_RO(fan4_fault, fan_fault, 3);
static SENSOR_DEVICE_ATTR_RO(fan1_min, fan_min, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_min, fan_min, 1);
static SENSOR_DEVICE_ATTR_RO(fan3_min, fan_min, 2);
static SENSOR_DEVICE_ATTR_RO(fan4_min, fan_min, 3);

static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
static SENSOR_DEVICE_ATTR_RO(in0_label, in_label, 0);
static SENSOR_DEVICE_ATTR_RO(in1_label, in_label, 1);
static SENSOR_DEVICE_ATTR_RO(in2_label, in_label, 2);
static SENSOR_DEVICE_ATTR_RO(in3_label, in_label, 3);

static struct attribute *sch5627_attributes[] = {
	&dev_attr_name.attr,

	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp4_input.dev_attr.attr,
	&sensor_dev_attr_temp5_input.dev_attr.attr,
	&sensor_dev_attr_temp6_input.dev_attr.attr,
	&sensor_dev_attr_temp7_input.dev_attr.attr,
	&sensor_dev_attr_temp8_input.dev_attr.attr,
	&sensor_dev_attr_temp1_fault.dev_attr.attr,
	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	&sensor_dev_attr_temp3_fault.dev_attr.attr,
	&sensor_dev_attr_temp4_fault.dev_attr.attr,
	&sensor_dev_attr_temp5_fault.dev_attr.attr,
	&sensor_dev_attr_temp6_fault.dev_attr.attr,
	&sensor_dev_attr_temp7_fault.dev_attr.attr,
	&sensor_dev_attr_temp8_fault.dev_attr.attr,
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp2_max.dev_attr.attr,
	&sensor_dev_attr_temp3_max.dev_attr.attr,
	&sensor_dev_attr_temp4_max.dev_attr.attr,
	&sensor_dev_attr_temp5_max.dev_attr.attr,
	&sensor_dev_attr_temp6_max.dev_attr.attr,
	&sensor_dev_attr_temp7_max.dev_attr.attr,
	&sensor_dev_attr_temp8_max.dev_attr.attr,
	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	&sensor_dev_attr_temp4_crit.dev_attr.attr,
	&sensor_dev_attr_temp5_crit.dev_attr.attr,
	&sensor_dev_attr_temp6_crit.dev_attr.attr,
	&sensor_dev_attr_temp7_crit.dev_attr.attr,
	&sensor_dev_attr_temp8_crit.dev_attr.attr,

	&sensor_dev_attr_fan1_input.dev_attr.attr,
	&sensor_dev_attr_fan2_input.dev_attr.attr,
	&sensor_dev_attr_fan3_input.dev_attr.attr,
	&sensor_dev_attr_fan4_input.dev_attr.attr,
	&sensor_dev_attr_fan1_fault.dev_attr.attr,
	&sensor_dev_attr_fan2_fault.dev_attr.attr,
	&sensor_dev_attr_fan3_fault.dev_attr.attr,
	&sensor_dev_attr_fan4_fault.dev_attr.attr,
	&sensor_dev_attr_fan1_min.dev_attr.attr,
	&sensor_dev_attr_fan2_min.dev_attr.attr,
	&sensor_dev_attr_fan3_min.dev_attr.attr,
	&sensor_dev_attr_fan4_min.dev_attr.attr,

	&sensor_dev_attr_in0_input.dev_attr.attr,
	&sensor_dev_attr_in1_input.dev_attr.attr,
	&sensor_dev_attr_in2_input.dev_attr.attr,
	&sensor_dev_attr_in3_input.dev_attr.attr,
	&sensor_dev_attr_in4_input.dev_attr.attr,
	&sensor_dev_attr_in0_label.dev_attr.attr,
	&sensor_dev_attr_in1_label.dev_attr.attr,
	&sensor_dev_attr_in2_label.dev_attr.attr,
	&sensor_dev_attr_in3_label.dev_attr.attr,
	/* No in4_label as in4 is a generic input pin */

	NULL
};

static const struct attribute_group sch5627_group = {
	.attrs = sch5627_attributes,
};

static int sch5627_remove(struct platform_device *pdev)
{
	struct sch5627_data *data = platform_get_drvdata(pdev);

	if (data->watchdog)
		sch56xx_watchdog_unregister(data->watchdog);

	if (data->hwmon_dev)
		hwmon_device_unregister(data->hwmon_dev);

	sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);

	return 0;
}

static int sch5627_probe(struct platform_device *pdev)
{
	struct sch5627_data *data;
	int err, 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) {
		err = val;
		goto error;
	}
	if (val != SCH5627_HWMON_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
		       val, SCH5627_HWMON_ID);
		err = -ENODEV;
		goto error;
	}

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
	if (val < 0) {
		err = val;
		goto error;
	}
	if (val != SCH5627_COMPANY_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
		       val, SCH5627_COMPANY_ID);
		err = -ENODEV;
		goto error;
	}

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
	if (val < 0) {
		err = val;
		goto error;
	}
	if (val != SCH5627_PRIMARY_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
		       val, SCH5627_PRIMARY_ID);
		err = -ENODEV;
		goto error;
	}

	build_code = sch56xx_read_virtual_reg(data->addr,
					      SCH5627_REG_BUILD_CODE);
	if (build_code < 0) {
		err = build_code;
		goto error;
	}

	build_id = sch56xx_read_virtual_reg16(data->addr,
					      SCH5627_REG_BUILD_ID);
	if (build_id < 0) {
		err = build_id;
		goto error;
	}

	hwmon_rev = sch56xx_read_virtual_reg(data->addr,
					     SCH5627_REG_HWMON_REV);
	if (hwmon_rev < 0) {
		err = hwmon_rev;
		goto error;
	}

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
	if (val < 0) {
		err = val;
		goto error;
	}
	data->control = val;
	if (!(data->control & 0x01)) {
		pr_err("hardware monitoring not enabled\n");
		err = -ENODEV;
		goto error;
	}
	/* 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 | 0x10);
	data->last_battery = jiffies;

	/*
	 * Read limits, we do this only once as reading a register on
	 * the sch5627 is quite expensive (and they don't change).
	 */
	err = sch5627_read_limits(data);
	if (err)
		goto error;

	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);

	/* Register sysfs interface files */
	err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
	if (err)
		goto error;

	data->hwmon_dev = hwmon_device_register(&pdev->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		data->hwmon_dev = NULL;
		goto error;
	}

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

	return 0;

error:
	sch5627_remove(pdev);
	return err;
}

static struct platform_driver sch5627_driver = {
	.driver = {
		.name	= DRVNAME,
	},
	.probe		= sch5627_probe,
	.remove		= sch5627_remove,
};

module_platform_driver(sch5627_driver);

MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
MODULE_AUTHOR("Hans de Goede <[email protected]>");
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 <[email protected]> *
a98d506c	4	* *
a98d506c HG	5	***************************************************************************/
	6
	7	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	8
	9	#include <linux/module.h>
	10	#include <linux/init.h>
	11	#include <linux/slab.h>
	12	#include <linux/jiffies.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/hwmon.h>
	15	#include <linux/hwmon-sysfs.h>
	16	#include <linux/err.h>
	17	#include <linux/mutex.h>
28ff2f7a	18	#include "sch56xx-common.h"
a98d506c HG	19
	20	#define DRVNAME "sch5627"
	21	#define DEVNAME DRVNAME /* We only support one model */
	22
a98d506c HG	23	#define SCH5627_HWMON_ID 0xa5
	24	#define SCH5627_COMPANY_ID 0x5c
	25	#define SCH5627_PRIMARY_ID 0xa0
	26
	27	#define SCH5627_REG_BUILD_CODE 0x39
	28	#define SCH5627_REG_BUILD_ID 0x3a
	29	#define SCH5627_REG_HWMON_ID 0x3c
	30	#define SCH5627_REG_HWMON_REV 0x3d
	31	#define SCH5627_REG_COMPANY_ID 0x3e
	32	#define SCH5627_REG_PRIMARY_ID 0x3f
	33	#define SCH5627_REG_CTRL 0x40
	34
	35	#define SCH5627_NO_TEMPS 8
	36	#define SCH5627_NO_FANS 4
	37	#define SCH5627_NO_IN 5
	38
	39	static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
	40	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
	41	static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
	42	0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
	43	static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
	44	0, 0, 1, 1, 0, 0, 0, 1 };
	45	static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
	46	0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
	47	static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
	48	0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
	49
	50	static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
	51	0x2C, 0x2E, 0x30, 0x32 };
	52	static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
	53	0x62, 0x64, 0x66, 0x68 };
	54
	55	static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
	56	0x22, 0x23, 0x24, 0x25, 0x189 };
	57	static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
	58	0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
	59	static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
	60	1, 0, 1, 0, 1 };
	61	static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
	62	10745, 3660, 9765, 10745, 3660 };
	63	static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
	64	"VCC", "VTT", "VBAT", "VTR", "V_IN" };
	65
	66	struct sch5627_data {
	67	unsigned short addr;
	68	struct device *hwmon_dev;
312869ec	69	struct sch56xx_watchdog_data *watchdog;
357b9dc6	70	u8 control;
a98d506c HG	71	u8 temp_max[SCH5627_NO_TEMPS];
	72	u8 temp_crit[SCH5627_NO_TEMPS];
	73	u16 fan_min[SCH5627_NO_FANS];
	74
	75	struct mutex update_lock;
357b9dc6	76	unsigned long last_battery; /* In jiffies */
a98d506c HG	77	char valid; /* !=0 if following fields are valid */
	78	unsigned long last_updated; /* In jiffies */
	79	u16 temp[SCH5627_NO_TEMPS];
	80	u16 fan[SCH5627_NO_FANS];
	81	u16 in[SCH5627_NO_IN];
	82	};
	83
a98d506c HG	84	static struct sch5627_data sch5627_update_device(struct device dev)
	85	{
	86	struct sch5627_data *data = dev_get_drvdata(dev);
	87	struct sch5627_data *ret = data;
	88	int i, val;
	89
	90	mutex_lock(&data->update_lock);
	91
357b9dc6 HG	92	/* Trigger a Vbat voltage measurement every 5 minutes */
357b9dc6 HG	93	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
28ff2f7a	94	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
357b9dc6 HG	95	data->control \| 0x10);
	96	data->last_battery = jiffies;
	97	}
	98
a98d506c HG	99	/* Cache the values for 1 second */
	100	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
	101	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
28ff2f7a	102	val = sch56xx_read_virtual_reg12(data->addr,
a98d506c HG	103	SCH5627_REG_TEMP_MSB[i],
	104	SCH5627_REG_TEMP_LSN[i],
	105	SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
	106	if (unlikely(val < 0)) {
	107	ret = ERR_PTR(val);
	108	goto abort;
	109	}
	110	data->temp[i] = val;
	111	}
	112
	113	for (i = 0; i < SCH5627_NO_FANS; i++) {
28ff2f7a	114	val = sch56xx_read_virtual_reg16(data->addr,
a98d506c HG	115	SCH5627_REG_FAN[i]);
	116	if (unlikely(val < 0)) {
	117	ret = ERR_PTR(val);
	118	goto abort;
	119	}
	120	data->fan[i] = val;
	121	}
	122
	123	for (i = 0; i < SCH5627_NO_IN; i++) {
28ff2f7a	124	val = sch56xx_read_virtual_reg12(data->addr,
a98d506c HG	125	SCH5627_REG_IN_MSB[i],
	126	SCH5627_REG_IN_LSN[i],
	127	SCH5627_REG_IN_HIGH_NIBBLE[i]);
	128	if (unlikely(val < 0)) {
	129	ret = ERR_PTR(val);
	130	goto abort;
	131	}
	132	data->in[i] = val;
	133	}
	134
	135	data->last_updated = jiffies;
	136	data->valid = 1;
	137	}
	138	abort:
	139	mutex_unlock(&data->update_lock);
	140	return ret;
	141	}
	142
6c931ae1	143	static int sch5627_read_limits(struct sch5627_data *data)
a98d506c HG	144	{
	145	int i, val;
	146
	147	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
	148	/*
	149	* Note what SMSC calls ABS, is what lm_sensors calls max
	150	* (aka high), and HIGH is what lm_sensors calls crit.
	151	*/
28ff2f7a HG	152	val = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	153	SCH5627_REG_TEMP_ABS[i]);
a98d506c HG	154	if (val < 0)
	155	return val;
	156	data->temp_max[i] = val;
	157
28ff2f7a HG	158	val = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	159	SCH5627_REG_TEMP_HIGH[i]);
a98d506c HG	160	if (val < 0)
	161	return val;
	162	data->temp_crit[i] = val;
	163	}
	164	for (i = 0; i < SCH5627_NO_FANS; i++) {
28ff2f7a HG	165	val = sch56xx_read_virtual_reg16(data->addr,
28ff2f7a HG	166	SCH5627_REG_FAN_MIN[i]);
a98d506c HG	167	if (val < 0)
	168	return val;
	169	data->fan_min[i] = val;
	170	}
	171
	172	return 0;
	173	}
	174
	175	static int reg_to_temp(u16 reg)
	176	{
	177	return (reg * 625) / 10 - 64000;
	178	}
	179
	180	static int reg_to_temp_limit(u8 reg)
	181	{
	182	return (reg - 64) * 1000;
	183	}
	184
	185	static int reg_to_rpm(u16 reg)
	186	{
	187	if (reg == 0)
	188	return -EIO;
	189	if (reg == 0xffff)
	190	return 0;
	191
	192	return 5400540 / reg;
	193	}
	194
3776c835	195	static ssize_t name_show(struct device dev, struct device_attribute devattr,
a98d506c HG	196	char *buf)
	197	{
	198	return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
	199	}
	200
290dbb8e GR	201	static ssize_t temp_show(struct device dev, struct device_attribute devattr,
290dbb8e GR	202	char *buf)
a98d506c HG	203	{
	204	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	205	struct sch5627_data *data = sch5627_update_device(dev);
	206	int val;
	207
	208	if (IS_ERR(data))
	209	return PTR_ERR(data);
	210
	211	val = reg_to_temp(data->temp[attr->index]);
	212	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	213	}
	214
290dbb8e GR	215	static ssize_t temp_fault_show(struct device *dev,
290dbb8e GR	216	struct device_attribute devattr, char buf)
a98d506c HG	217	{
	218	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	219	struct sch5627_data *data = sch5627_update_device(dev);
	220
	221	if (IS_ERR(data))
	222	return PTR_ERR(data);
	223
	224	return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
	225	}
	226
290dbb8e GR	227	static ssize_t temp_max_show(struct device *dev,
290dbb8e GR	228	struct device_attribute devattr, char buf)
a98d506c HG	229	{
	230	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	231	struct sch5627_data *data = dev_get_drvdata(dev);
	232	int val;
	233
	234	val = reg_to_temp_limit(data->temp_max[attr->index]);
	235	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	236	}
	237
290dbb8e GR	238	static ssize_t temp_crit_show(struct device *dev,
290dbb8e GR	239	struct device_attribute devattr, char buf)
a98d506c HG	240	{
	241	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	242	struct sch5627_data *data = dev_get_drvdata(dev);
	243	int val;
	244
	245	val = reg_to_temp_limit(data->temp_crit[attr->index]);
	246	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	247	}
	248
290dbb8e GR	249	static ssize_t fan_show(struct device dev, struct device_attribute devattr,
290dbb8e GR	250	char *buf)
a98d506c HG	251	{
	252	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	253	struct sch5627_data *data = sch5627_update_device(dev);
	254	int val;
	255
	256	if (IS_ERR(data))
	257	return PTR_ERR(data);
	258
	259	val = reg_to_rpm(data->fan[attr->index]);
	260	if (val < 0)
	261	return val;
	262
	263	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	264	}
	265
290dbb8e GR	266	static ssize_t fan_fault_show(struct device *dev,
290dbb8e GR	267	struct device_attribute devattr, char buf)
a98d506c HG	268	{
	269	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	270	struct sch5627_data *data = sch5627_update_device(dev);
	271
	272	if (IS_ERR(data))
	273	return PTR_ERR(data);
	274
	275	return snprintf(buf, PAGE_SIZE, "%d\n",
	276	data->fan[attr->index] == 0xffff);
	277	}
	278
290dbb8e GR	279	static ssize_t fan_min_show(struct device *dev,
290dbb8e GR	280	struct device_attribute devattr, char buf)
a98d506c HG	281	{
	282	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	283	struct sch5627_data *data = dev_get_drvdata(dev);
	284	int val = reg_to_rpm(data->fan_min[attr->index]);
	285	if (val < 0)
	286	return val;
	287
	288	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	289	}
	290
290dbb8e GR	291	static ssize_t in_show(struct device dev, struct device_attribute devattr,
290dbb8e GR	292	char *buf)
a98d506c HG	293	{
	294	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	295	struct sch5627_data *data = sch5627_update_device(dev);
	296	int val;
	297
	298	if (IS_ERR(data))
	299	return PTR_ERR(data);
	300
	301	val = DIV_ROUND_CLOSEST(
	302	data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
	303	10000);
	304	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	305	}
	306
290dbb8e GR	307	static ssize_t in_label_show(struct device *dev,
290dbb8e GR	308	struct device_attribute devattr, char buf)
a98d506c HG	309	{
	310	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	311
	312	return snprintf(buf, PAGE_SIZE, "%s\n",
	313	SCH5627_IN_LABELS[attr->index]);
	314	}
	315
3776c835	316	static DEVICE_ATTR_RO(name);
290dbb8e GR	317	static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
	318	static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
	319	static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
	320	static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
	321	static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
	322	static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
	323	static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
	324	static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
	325	static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
	326	static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
	327	static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
	328	static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
	329	static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
	330	static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
	331	static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
	332	static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
	333	static SENSOR_DEVICE_ATTR_RO(temp1_max, temp_max, 0);
	334	static SENSOR_DEVICE_ATTR_RO(temp2_max, temp_max, 1);
	335	static SENSOR_DEVICE_ATTR_RO(temp3_max, temp_max, 2);
	336	static SENSOR_DEVICE_ATTR_RO(temp4_max, temp_max, 3);
	337	static SENSOR_DEVICE_ATTR_RO(temp5_max, temp_max, 4);
	338	static SENSOR_DEVICE_ATTR_RO(temp6_max, temp_max, 5);
	339	static SENSOR_DEVICE_ATTR_RO(temp7_max, temp_max, 6);
	340	static SENSOR_DEVICE_ATTR_RO(temp8_max, temp_max, 7);
	341	static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0);
	342	static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_crit, 1);
	343	static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_crit, 2);
	344	static SENSOR_DEVICE_ATTR_RO(temp4_crit, temp_crit, 3);
	345	static SENSOR_DEVICE_ATTR_RO(temp5_crit, temp_crit, 4);
	346	static SENSOR_DEVICE_ATTR_RO(temp6_crit, temp_crit, 5);
	347	static SENSOR_DEVICE_ATTR_RO(temp7_crit, temp_crit, 6);
	348	static SENSOR_DEVICE_ATTR_RO(temp8_crit, temp_crit, 7);
	349
	350	static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
	351	static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
	352	static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
	353	static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
	354	static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan_fault, 0);
	355	static SENSOR_DEVICE_ATTR_RO(fan2_fault, fan_fault, 1);
	356	static SENSOR_DEVICE_ATTR_RO(fan3_fault, fan_fault, 2);
	357	static SENSOR_DEVICE_ATTR_RO(fan4_fault, fan_fault, 3);
	358	static SENSOR_DEVICE_ATTR_RO(fan1_min, fan_min, 0);
	359	static SENSOR_DEVICE_ATTR_RO(fan2_min, fan_min, 1);
	360	static SENSOR_DEVICE_ATTR_RO(fan3_min, fan_min, 2);
	361	static SENSOR_DEVICE_ATTR_RO(fan4_min, fan_min, 3);
	362
	363	static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
	364	static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
	365	static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
	366	static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
	367	static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
	368	static SENSOR_DEVICE_ATTR_RO(in0_label, in_label, 0);
	369	static SENSOR_DEVICE_ATTR_RO(in1_label, in_label, 1);
	370	static SENSOR_DEVICE_ATTR_RO(in2_label, in_label, 2);
	371	static SENSOR_DEVICE_ATTR_RO(in3_label, in_label, 3);
a98d506c HG	372
	373	static struct attribute *sch5627_attributes[] = {
	374	&dev_attr_name.attr,
	375
	376	&sensor_dev_attr_temp1_input.dev_attr.attr,
	377	&sensor_dev_attr_temp2_input.dev_attr.attr,
	378	&sensor_dev_attr_temp3_input.dev_attr.attr,
	379	&sensor_dev_attr_temp4_input.dev_attr.attr,
	380	&sensor_dev_attr_temp5_input.dev_attr.attr,
	381	&sensor_dev_attr_temp6_input.dev_attr.attr,
	382	&sensor_dev_attr_temp7_input.dev_attr.attr,
	383	&sensor_dev_attr_temp8_input.dev_attr.attr,
	384	&sensor_dev_attr_temp1_fault.dev_attr.attr,
	385	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	386	&sensor_dev_attr_temp3_fault.dev_attr.attr,
	387	&sensor_dev_attr_temp4_fault.dev_attr.attr,
	388	&sensor_dev_attr_temp5_fault.dev_attr.attr,
	389	&sensor_dev_attr_temp6_fault.dev_attr.attr,
	390	&sensor_dev_attr_temp7_fault.dev_attr.attr,
	391	&sensor_dev_attr_temp8_fault.dev_attr.attr,
	392	&sensor_dev_attr_temp1_max.dev_attr.attr,
	393	&sensor_dev_attr_temp2_max.dev_attr.attr,
	394	&sensor_dev_attr_temp3_max.dev_attr.attr,
	395	&sensor_dev_attr_temp4_max.dev_attr.attr,
	396	&sensor_dev_attr_temp5_max.dev_attr.attr,
	397	&sensor_dev_attr_temp6_max.dev_attr.attr,
	398	&sensor_dev_attr_temp7_max.dev_attr.attr,
	399	&sensor_dev_attr_temp8_max.dev_attr.attr,
	400	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	401	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	402	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	403	&sensor_dev_attr_temp4_crit.dev_attr.attr,
	404	&sensor_dev_attr_temp5_crit.dev_attr.attr,
	405	&sensor_dev_attr_temp6_crit.dev_attr.attr,
	406	&sensor_dev_attr_temp7_crit.dev_attr.attr,
	407	&sensor_dev_attr_temp8_crit.dev_attr.attr,
	408
	409	&sensor_dev_attr_fan1_input.dev_attr.attr,
	410	&sensor_dev_attr_fan2_input.dev_attr.attr,
	411	&sensor_dev_attr_fan3_input.dev_attr.attr,
	412	&sensor_dev_attr_fan4_input.dev_attr.attr,
	413	&sensor_dev_attr_fan1_fault.dev_attr.attr,
	414	&sensor_dev_attr_fan2_fault.dev_attr.attr,
	415	&sensor_dev_attr_fan3_fault.dev_attr.attr,
	416	&sensor_dev_attr_fan4_fault.dev_attr.attr,
	417	&sensor_dev_attr_fan1_min.dev_attr.attr,
	418	&sensor_dev_attr_fan2_min.dev_attr.attr,
	419	&sensor_dev_attr_fan3_min.dev_attr.attr,
	420	&sensor_dev_attr_fan4_min.dev_attr.attr,
	421
	422	&sensor_dev_attr_in0_input.dev_attr.attr,
	423	&sensor_dev_attr_in1_input.dev_attr.attr,
	424	&sensor_dev_attr_in2_input.dev_attr.attr,
	425	&sensor_dev_attr_in3_input.dev_attr.attr,
	426	&sensor_dev_attr_in4_input.dev_attr.attr,
	427	&sensor_dev_attr_in0_label.dev_attr.attr,
	428	&sensor_dev_attr_in1_label.dev_attr.attr,
	429	&sensor_dev_attr_in2_label.dev_attr.attr,
	430	&sensor_dev_attr_in3_label.dev_attr.attr,
	431	/* No in4_label as in4 is a generic input pin */
	432
	433	NULL
	434	};
	435
436	static const struct attribute_group sch5627_group = {
437	.attrs = sch5627_attributes,
438	};
439
440	static int sch5627_remove(struct platform_device *pdev)
441	{
442	struct sch5627_data *data = platform_get_drvdata(pdev);
443
312869ec HG	444	if (data->watchdog)
	445	sch56xx_watchdog_unregister(data->watchdog);
	446
a98d506c HG	447	if (data->hwmon_dev)
	448	hwmon_device_unregister(data->hwmon_dev);
	449
	450	sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
a98d506c HG	451
	452	return 0;
	453	}
	454
6c931ae1	455	static int sch5627_probe(struct platform_device *pdev)
a98d506c HG	456	{
	457	struct sch5627_data *data;
	458	int err, build_code, build_id, hwmon_rev, val;
	459
bd8d8e08 GR	460	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
bd8d8e08 GR	461	GFP_KERNEL);
a98d506c HG	462	if (!data)
	463	return -ENOMEM;
	464
	465	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	466	mutex_init(&data->update_lock);
	467	platform_set_drvdata(pdev, data);
	468
28ff2f7a	469	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
a98d506c HG	470	if (val < 0) {
	471	err = val;
	472	goto error;
	473	}
	474	if (val != SCH5627_HWMON_ID) {
	475	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
	476	val, SCH5627_HWMON_ID);
	477	err = -ENODEV;
	478	goto error;
	479	}
	480
28ff2f7a	481	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
a98d506c HG	482	if (val < 0) {
	483	err = val;
	484	goto error;
	485	}
	486	if (val != SCH5627_COMPANY_ID) {
	487	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
	488	val, SCH5627_COMPANY_ID);
	489	err = -ENODEV;
	490	goto error;
	491	}
	492
28ff2f7a	493	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
a98d506c HG	494	if (val < 0) {
	495	err = val;
	496	goto error;
	497	}
	498	if (val != SCH5627_PRIMARY_ID) {
	499	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
	500	val, SCH5627_PRIMARY_ID);
	501	err = -ENODEV;
	502	goto error;
	503	}
	504
28ff2f7a HG	505	build_code = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	506	SCH5627_REG_BUILD_CODE);
a98d506c HG	507	if (build_code < 0) {
	508	err = build_code;
	509	goto error;
	510	}
	511
28ff2f7a HG	512	build_id = sch56xx_read_virtual_reg16(data->addr,
28ff2f7a HG	513	SCH5627_REG_BUILD_ID);
a98d506c HG	514	if (build_id < 0) {
	515	err = build_id;
	516	goto error;
	517	}
	518
28ff2f7a HG	519	hwmon_rev = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	520	SCH5627_REG_HWMON_REV);
a98d506c HG	521	if (hwmon_rev < 0) {
	522	err = hwmon_rev;
	523	goto error;
	524	}
	525
28ff2f7a	526	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
a98d506c HG	527	if (val < 0) {
	528	err = val;
	529	goto error;
	530	}
357b9dc6 HG	531	data->control = val;
357b9dc6 HG	532	if (!(data->control & 0x01)) {
a98d506c HG	533	pr_err("hardware monitoring not enabled\n");
	534	err = -ENODEV;
	535	goto error;
	536	}
357b9dc6 HG	537	/* Trigger a Vbat voltage measurement, so that we get a valid reading
357b9dc6 HG	538	the first time we read Vbat */
28ff2f7a	539	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
357b9dc6 HG	540	data->control \| 0x10);
357b9dc6 HG	541	data->last_battery = jiffies;
a98d506c HG	542
	543	/*
	544	* Read limits, we do this only once as reading a register on
	545	* the sch5627 is quite expensive (and they don't change).
	546	*/
	547	err = sch5627_read_limits(data);
	548	if (err)
	549	goto error;
	550
28ff2f7a	551	pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
a98d506c HG	552	pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
	553	build_code, build_id, hwmon_rev);
	554
	555	/* Register sysfs interface files */
	556	err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
	557	if (err)
	558	goto error;
	559
	560	data->hwmon_dev = hwmon_device_register(&pdev->dev);
	561	if (IS_ERR(data->hwmon_dev)) {
	562	err = PTR_ERR(data->hwmon_dev);
	563	data->hwmon_dev = NULL;
	564	goto error;
	565	}
	566
312869ec	567	/* Note failing to register the watchdog is not a fatal error */
fb551405	568	data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
312869ec HG	569	(build_code << 24) \| (build_id << 8) \| hwmon_rev,
	570	&data->update_lock, 1);
	571
a98d506c HG	572	return 0;
	573
	574	error:
	575	sch5627_remove(pdev);
	576	return err;
	577	}
	578
a98d506c HG	579	static struct platform_driver sch5627_driver = {
a98d506c HG	580	.driver = {
a98d506c HG	581	.name = DRVNAME,
	582	},
	583	.probe = sch5627_probe,
	584	.remove = sch5627_remove,
	585	};
	586
25a236a5	587	module_platform_driver(sch5627_driver);
a98d506c HG	588
a98d506c HG	589	MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
7958e3b4	590	MODULE_AUTHOR("Hans de Goede <[email protected]>");
a98d506c	591	MODULE_LICENSE("GPL");