ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/hwmon/max6650.c b/marvell/linux/drivers/hwmon/max6650.c
new file mode 100644
index 0000000..3d9d371
--- /dev/null
+++ b/marvell/linux/drivers/hwmon/max6650.c
@@ -0,0 +1,828 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * max6650.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring.
+ *
+ * (C) 2007 by Hans J. Koch <hjk@hansjkoch.de>
+ *
+ * based on code written by John Morris <john.morris@spirentcom.com>
+ * Copyright (c) 2003 Spirent Communications
+ * and Claus Gindhart <claus.gindhart@kontron.com>
+ *
+ * This module has only been tested with the MAX6650 chip. It should
+ * also work with the MAX6651. It does not distinguish max6650 and max6651
+ * chips.
+ *
+ * The datasheet was last seen at:
+ *
+ * http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/of_device.h>
+#include <linux/thermal.h>
+
+/*
+ * Insmod parameters
+ */
+
+/* fan_voltage: 5=5V fan, 12=12V fan, 0=don't change */
+static int fan_voltage;
+/* prescaler: Possible values are 1, 2, 4, 8, 16 or 0 for don't change */
+static int prescaler;
+/* clock: The clock frequency of the chip (max6651 can be clocked externally) */
+static int clock = 254000;
+
+module_param(fan_voltage, int, 0444);
+module_param(prescaler, int, 0444);
+module_param(clock, int, 0444);
+
+/*
+ * MAX 6650/6651 registers
+ */
+
+#define MAX6650_REG_SPEED 0x00
+#define MAX6650_REG_CONFIG 0x02
+#define MAX6650_REG_GPIO_DEF 0x04
+#define MAX6650_REG_DAC 0x06
+#define MAX6650_REG_ALARM_EN 0x08
+#define MAX6650_REG_ALARM 0x0A
+#define MAX6650_REG_TACH0 0x0C
+#define MAX6650_REG_TACH1 0x0E
+#define MAX6650_REG_TACH2 0x10
+#define MAX6650_REG_TACH3 0x12
+#define MAX6650_REG_GPIO_STAT 0x14
+#define MAX6650_REG_COUNT 0x16
+
+/*
+ * Config register bits
+ */
+
+#define MAX6650_CFG_V12 0x08
+#define MAX6650_CFG_PRESCALER_MASK 0x07
+#define MAX6650_CFG_PRESCALER_2 0x01
+#define MAX6650_CFG_PRESCALER_4 0x02
+#define MAX6650_CFG_PRESCALER_8 0x03
+#define MAX6650_CFG_PRESCALER_16 0x04
+#define MAX6650_CFG_MODE_MASK 0x30
+#define MAX6650_CFG_MODE_ON 0x00
+#define MAX6650_CFG_MODE_OFF 0x10
+#define MAX6650_CFG_MODE_CLOSED_LOOP 0x20
+#define MAX6650_CFG_MODE_OPEN_LOOP 0x30
+#define MAX6650_COUNT_MASK 0x03
+
+/*
+ * Alarm status register bits
+ */
+
+#define MAX6650_ALRM_MAX 0x01
+#define MAX6650_ALRM_MIN 0x02
+#define MAX6650_ALRM_TACH 0x04
+#define MAX6650_ALRM_GPIO1 0x08
+#define MAX6650_ALRM_GPIO2 0x10
+
+/* Minimum and maximum values of the FAN-RPM */
+#define FAN_RPM_MIN 240
+#define FAN_RPM_MAX 30000
+
+#define DIV_FROM_REG(reg) (1 << ((reg) & 7))
+#define DAC_LIMIT(v12) ((v12) ? 180 : 76)
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct max6650_data {
+ struct i2c_client *client;
+ struct mutex update_lock; /* protect alarm register updates */
+ int nr_fans;
+ bool valid; /* false until following fields are valid */
+ unsigned long last_updated; /* in jiffies */
+
+ /* register values */
+ u8 speed;
+ u8 config;
+ u8 tach[4];
+ u8 count;
+ u8 dac;
+ u8 alarm;
+ u8 alarm_en;
+ unsigned long cooling_dev_state;
+};
+
+static const u8 tach_reg[] = {
+ MAX6650_REG_TACH0,
+ MAX6650_REG_TACH1,
+ MAX6650_REG_TACH2,
+ MAX6650_REG_TACH3,
+};
+
+static const struct of_device_id __maybe_unused max6650_dt_match[] = {
+ {
+ .compatible = "maxim,max6650",
+ .data = (void *)1
+ },
+ {
+ .compatible = "maxim,max6651",
+ .data = (void *)4
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, max6650_dt_match);
+
+static int dac_to_pwm(int dac, bool v12)
+{
+ /*
+ * Useful range for dac is 0-180 for 12V fans and 0-76 for 5V fans.
+ * Lower DAC values mean higher speeds.
+ */
+ return clamp_val(255 - (255 * dac) / DAC_LIMIT(v12), 0, 255);
+}
+
+static u8 pwm_to_dac(unsigned int pwm, bool v12)
+{
+ int limit = DAC_LIMIT(v12);
+
+ return limit - (limit * pwm) / 255;
+}
+
+static struct max6650_data *max6650_update_device(struct device *dev)
+{
+ struct max6650_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ int reg, err = 0;
+ int i;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+ for (i = 0; i < data->nr_fans; i++) {
+ reg = i2c_smbus_read_byte_data(client, tach_reg[i]);
+ if (reg < 0) {
+ err = reg;
+ goto error;
+ }
+ data->tach[i] = reg;
+ }
+
+ /*
+ * Alarms are cleared on read in case the condition that
+ * caused the alarm is removed. Keep the value latched here
+ * for providing the register through different alarm files.
+ */
+ reg = i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM);
+ if (reg < 0) {
+ err = reg;
+ goto error;
+ }
+ data->alarm |= reg;
+ data->last_updated = jiffies;
+ data->valid = true;
+ }
+
+error:
+ mutex_unlock(&data->update_lock);
+ if (err)
+ data = ERR_PTR(err);
+ return data;
+}
+
+/*
+ * Change the operating mode of the chip (if needed).
+ * mode is one of the MAX6650_CFG_MODE_* values.
+ */
+static int max6650_set_operating_mode(struct max6650_data *data, u8 mode)
+{
+ int result;
+ u8 config = data->config;
+
+ if (mode == (config & MAX6650_CFG_MODE_MASK))
+ return 0;
+
+ config = (config & ~MAX6650_CFG_MODE_MASK) | mode;
+
+ result = i2c_smbus_write_byte_data(data->client, MAX6650_REG_CONFIG,
+ config);
+ if (result < 0)
+ return result;
+
+ data->config = config;
+
+ return 0;
+}
+
+/*
+ * Set the fan speed to the specified RPM (or read back the RPM setting).
+ * This works in closed loop mode only. Use pwm1 for open loop speed setting.
+ *
+ * The MAX6650/1 will automatically control fan speed when in closed loop
+ * mode.
+ *
+ * Assumptions:
+ *
+ * 1) The MAX6650/1 internal 254kHz clock frequency is set correctly. Use
+ * the clock module parameter if you need to fine tune this.
+ *
+ * 2) The prescaler (low three bits of the config register) has already
+ * been set to an appropriate value. Use the prescaler module parameter
+ * if your BIOS doesn't initialize the chip properly.
+ *
+ * The relevant equations are given on pages 21 and 22 of the datasheet.
+ *
+ * From the datasheet, the relevant equation when in regulation is:
+ *
+ * [fCLK / (128 x (KTACH + 1))] = 2 x FanSpeed / KSCALE
+ *
+ * where:
+ *
+ * fCLK is the oscillator frequency (either the 254kHz internal
+ * oscillator or the externally applied clock)
+ *
+ * KTACH is the value in the speed register
+ *
+ * FanSpeed is the speed of the fan in rps
+ *
+ * KSCALE is the prescaler value (1, 2, 4, 8, or 16)
+ *
+ * When reading, we need to solve for FanSpeed. When writing, we need to
+ * solve for KTACH.
+ *
+ * Note: this tachometer is completely separate from the tachometers
+ * used to measure the fan speeds. Only one fan's speed (fan1) is
+ * controlled.
+ */
+
+static int max6650_set_target(struct max6650_data *data, unsigned long rpm)
+{
+ int kscale, ktach;
+
+ if (rpm == 0)
+ return max6650_set_operating_mode(data, MAX6650_CFG_MODE_OFF);
+
+ rpm = clamp_val(rpm, FAN_RPM_MIN, FAN_RPM_MAX);
+
+ /*
+ * Divide the required speed by 60 to get from rpm to rps, then
+ * use the datasheet equation:
+ *
+ * KTACH = [(fCLK x KSCALE) / (256 x FanSpeed)] - 1
+ */
+
+ kscale = DIV_FROM_REG(data->config);
+ ktach = ((clock * kscale) / (256 * rpm / 60)) - 1;
+ if (ktach < 0)
+ ktach = 0;
+ if (ktach > 255)
+ ktach = 255;
+ data->speed = ktach;
+
+ return i2c_smbus_write_byte_data(data->client, MAX6650_REG_SPEED,
+ data->speed);
+}
+
+/*
+ * Get gpio alarm status:
+ * Possible values:
+ * 0 = no alarm
+ * 1 = alarm
+ */
+
+static ssize_t alarm_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct max6650_data *data = max6650_update_device(dev);
+ bool alarm;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ alarm = data->alarm & attr->index;
+ if (alarm) {
+ mutex_lock(&data->update_lock);
+ data->alarm &= ~attr->index;
+ data->valid = false;
+ mutex_unlock(&data->update_lock);
+ }
+
+ return sprintf(buf, "%d\n", alarm);
+}
+
+static SENSOR_DEVICE_ATTR_RO(gpio1_alarm, alarm, MAX6650_ALRM_GPIO1);
+static SENSOR_DEVICE_ATTR_RO(gpio2_alarm, alarm, MAX6650_ALRM_GPIO2);
+
+static umode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
+ int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct max6650_data *data = dev_get_drvdata(dev);
+ struct device_attribute *devattr;
+
+ /*
+ * Hide the alarms that have not been enabled by the firmware
+ */
+
+ devattr = container_of(a, struct device_attribute, attr);
+ if (devattr == &sensor_dev_attr_gpio1_alarm.dev_attr ||
+ devattr == &sensor_dev_attr_gpio2_alarm.dev_attr) {
+ if (!(data->alarm_en & to_sensor_dev_attr(devattr)->index))
+ return 0;
+ }
+
+ return a->mode;
+}
+
+static struct attribute *max6650_attrs[] = {
+ &sensor_dev_attr_gpio1_alarm.dev_attr.attr,
+ &sensor_dev_attr_gpio2_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group max6650_group = {
+ .attrs = max6650_attrs,
+ .is_visible = max6650_attrs_visible,
+};
+
+static const struct attribute_group *max6650_groups[] = {
+ &max6650_group,
+ NULL
+};
+
+static int max6650_init_client(struct max6650_data *data,
+ struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ int reg;
+ int err;
+ u32 voltage;
+ u32 prescale;
+ u32 target_rpm;
+
+ if (of_property_read_u32(dev->of_node, "maxim,fan-microvolt",
+ &voltage))
+ voltage = fan_voltage;
+ else
+ voltage /= 1000000; /* Microvolts to volts */
+ if (of_property_read_u32(dev->of_node, "maxim,fan-prescale",
+ &prescale))
+ prescale = prescaler;
+
+ reg = i2c_smbus_read_byte_data(client, MAX6650_REG_CONFIG);
+ if (reg < 0) {
+ dev_err(dev, "Error reading config register, aborting.\n");
+ return reg;
+ }
+
+ switch (voltage) {
+ case 0:
+ break;
+ case 5:
+ reg &= ~MAX6650_CFG_V12;
+ break;
+ case 12:
+ reg |= MAX6650_CFG_V12;
+ break;
+ default:
+ dev_err(dev, "illegal value for fan_voltage (%d)\n", voltage);
+ }
+
+ switch (prescale) {
+ case 0:
+ break;
+ case 1:
+ reg &= ~MAX6650_CFG_PRESCALER_MASK;
+ break;
+ case 2:
+ reg = (reg & ~MAX6650_CFG_PRESCALER_MASK)
+ | MAX6650_CFG_PRESCALER_2;
+ break;
+ case 4:
+ reg = (reg & ~MAX6650_CFG_PRESCALER_MASK)
+ | MAX6650_CFG_PRESCALER_4;
+ break;
+ case 8:
+ reg = (reg & ~MAX6650_CFG_PRESCALER_MASK)
+ | MAX6650_CFG_PRESCALER_8;
+ break;
+ case 16:
+ reg = (reg & ~MAX6650_CFG_PRESCALER_MASK)
+ | MAX6650_CFG_PRESCALER_16;
+ break;
+ default:
+ dev_err(dev, "illegal value for prescaler (%d)\n", prescale);
+ }
+
+ dev_info(dev, "Fan voltage: %dV, prescaler: %d.\n",
+ (reg & MAX6650_CFG_V12) ? 12 : 5,
+ 1 << (reg & MAX6650_CFG_PRESCALER_MASK));
+
+ err = i2c_smbus_write_byte_data(client, MAX6650_REG_CONFIG, reg);
+ if (err) {
+ dev_err(dev, "Config write error, aborting.\n");
+ return err;
+ }
+ data->config = reg;
+
+ reg = i2c_smbus_read_byte_data(client, MAX6650_REG_SPEED);
+ if (reg < 0) {
+ dev_err(dev, "Failed to read speed register, aborting.\n");
+ return reg;
+ }
+ data->speed = reg;
+
+ reg = i2c_smbus_read_byte_data(client, MAX6650_REG_DAC);
+ if (reg < 0) {
+ dev_err(dev, "Failed to read DAC register, aborting.\n");
+ return reg;
+ }
+ data->dac = reg;
+
+ reg = i2c_smbus_read_byte_data(client, MAX6650_REG_COUNT);
+ if (reg < 0) {
+ dev_err(dev, "Failed to read count register, aborting.\n");
+ return reg;
+ }
+ data->count = reg;
+
+ reg = i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM_EN);
+ if (reg < 0) {
+ dev_err(dev, "Failed to read alarm configuration, aborting.\n");
+ return reg;
+ }
+ data->alarm_en = reg;
+
+ if (!of_property_read_u32(client->dev.of_node, "maxim,fan-target-rpm",
+ &target_rpm)) {
+ max6650_set_target(data, target_rpm);
+ max6650_set_operating_mode(data, MAX6650_CFG_MODE_CLOSED_LOOP);
+ }
+
+ return 0;
+}
+
+static int max6650_get_max_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ *state = 255;
+
+ return 0;
+}
+
+static int max6650_get_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ struct max6650_data *data = cdev->devdata;
+
+ *state = data->cooling_dev_state;
+
+ return 0;
+}
+
+static int max6650_set_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long state)
+{
+ struct max6650_data *data = cdev->devdata;
+ struct i2c_client *client = data->client;
+ int err;
+
+ state = clamp_val(state, 0, 255);
+
+ mutex_lock(&data->update_lock);
+
+ data->dac = pwm_to_dac(state, data->config & MAX6650_CFG_V12);
+ err = i2c_smbus_write_byte_data(client, MAX6650_REG_DAC, data->dac);
+ if (!err) {
+ max6650_set_operating_mode(data, state ?
+ MAX6650_CFG_MODE_OPEN_LOOP :
+ MAX6650_CFG_MODE_OFF);
+ data->cooling_dev_state = state;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return err;
+}
+
+static const struct thermal_cooling_device_ops max6650_cooling_ops = {
+ .get_max_state = max6650_get_max_state,
+ .get_cur_state = max6650_get_cur_state,
+ .set_cur_state = max6650_set_cur_state,
+};
+
+static int max6650_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct max6650_data *data = max6650_update_device(dev);
+ int mode;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ switch (type) {
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_input:
+ *val = dac_to_pwm(data->dac,
+ data->config & MAX6650_CFG_V12);
+ break;
+ case hwmon_pwm_enable:
+ /*
+ * Possible values:
+ * 0 = Fan always on
+ * 1 = Open loop, Voltage is set according to speed,
+ * not regulated.
+ * 2 = Closed loop, RPM for all fans regulated by fan1
+ * tachometer
+ * 3 = Fan off
+ */
+ mode = (data->config & MAX6650_CFG_MODE_MASK) >> 4;
+ *val = (4 - mode) & 3; /* {0 1 2 3} -> {0 3 2 1} */
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ break;
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_input:
+ /*
+ * Calculation details:
+ *
+ * Each tachometer counts over an interval given by the
+ * "count" register (0.25, 0.5, 1 or 2 seconds).
+ * The driver assumes that the fans produce two pulses
+ * per revolution (this seems to be the most common).
+ */
+ *val = DIV_ROUND_CLOSEST(data->tach[channel] * 120,
+ DIV_FROM_REG(data->count));
+ break;
+ case hwmon_fan_div:
+ *val = DIV_FROM_REG(data->count);
+ break;
+ case hwmon_fan_target:
+ /*
+ * Use the datasheet equation:
+ * FanSpeed = KSCALE x fCLK / [256 x (KTACH + 1)]
+ * then multiply by 60 to give rpm.
+ */
+ *val = 60 * DIV_FROM_REG(data->config) * clock /
+ (256 * (data->speed + 1));
+ break;
+ case hwmon_fan_min_alarm:
+ *val = !!(data->alarm & MAX6650_ALRM_MIN);
+ data->alarm &= ~MAX6650_ALRM_MIN;
+ data->valid = false;
+ break;
+ case hwmon_fan_max_alarm:
+ *val = !!(data->alarm & MAX6650_ALRM_MAX);
+ data->alarm &= ~MAX6650_ALRM_MAX;
+ data->valid = false;
+ break;
+ case hwmon_fan_fault:
+ *val = !!(data->alarm & MAX6650_ALRM_TACH);
+ data->alarm &= ~MAX6650_ALRM_TACH;
+ data->valid = false;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
+
+static const u8 max6650_pwm_modes[] = {
+ MAX6650_CFG_MODE_ON,
+ MAX6650_CFG_MODE_OPEN_LOOP,
+ MAX6650_CFG_MODE_CLOSED_LOOP,
+ MAX6650_CFG_MODE_OFF,
+};
+
+static int max6650_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long val)
+{
+ struct max6650_data *data = dev_get_drvdata(dev);
+ int ret = 0;
+ u8 reg;
+
+ mutex_lock(&data->update_lock);
+
+ switch (type) {
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_input:
+ reg = pwm_to_dac(clamp_val(val, 0, 255),
+ data->config & MAX6650_CFG_V12);
+ ret = i2c_smbus_write_byte_data(data->client,
+ MAX6650_REG_DAC, reg);
+ if (ret)
+ break;
+ data->dac = reg;
+ break;
+ case hwmon_pwm_enable:
+ if (val < 0 || val >= ARRAY_SIZE(max6650_pwm_modes)) {
+ ret = -EINVAL;
+ break;
+ }
+ ret = max6650_set_operating_mode(data,
+ max6650_pwm_modes[val]);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+ break;
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_div:
+ switch (val) {
+ case 1:
+ reg = 0;
+ break;
+ case 2:
+ reg = 1;
+ break;
+ case 4:
+ reg = 2;
+ break;
+ case 8:
+ reg = 3;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error;
+ }
+ ret = i2c_smbus_write_byte_data(data->client,
+ MAX6650_REG_COUNT, reg);
+ if (ret)
+ break;
+ data->count = reg;
+ break;
+ case hwmon_fan_target:
+ if (val < 0) {
+ ret = -EINVAL;
+ break;
+ }
+ ret = max6650_set_target(data, val);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+error:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static umode_t max6650_is_visible(const void *_data,
+ enum hwmon_sensor_types type, u32 attr,
+ int channel)
+{
+ const struct max6650_data *data = _data;
+
+ if (channel && (channel >= data->nr_fans || type != hwmon_fan))
+ return 0;
+
+ switch (type) {
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_input:
+ return 0444;
+ case hwmon_fan_target:
+ case hwmon_fan_div:
+ return 0644;
+ case hwmon_fan_min_alarm:
+ if (data->alarm_en & MAX6650_ALRM_MIN)
+ return 0444;
+ break;
+ case hwmon_fan_max_alarm:
+ if (data->alarm_en & MAX6650_ALRM_MAX)
+ return 0444;
+ break;
+ case hwmon_fan_fault:
+ if (data->alarm_en & MAX6650_ALRM_TACH)
+ return 0444;
+ break;
+ default:
+ break;
+ }
+ break;
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_input:
+ case hwmon_pwm_enable:
+ return 0644;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+static const struct hwmon_channel_info *max6650_info[] = {
+ HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
+ HWMON_F_MIN_ALARM | HWMON_F_MAX_ALARM |
+ HWMON_F_FAULT,
+ HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT),
+ HWMON_CHANNEL_INFO(pwm, HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
+ NULL
+};
+
+static const struct hwmon_ops max6650_hwmon_ops = {
+ .read = max6650_read,
+ .write = max6650_write,
+ .is_visible = max6650_is_visible,
+};
+
+static const struct hwmon_chip_info max6650_chip_info = {
+ .ops = &max6650_hwmon_ops,
+ .info = max6650_info,
+};
+
+static int max6650_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct thermal_cooling_device *cooling_dev;
+ struct device *dev = &client->dev;
+ const struct of_device_id *of_id =
+ of_match_device(of_match_ptr(max6650_dt_match), dev);
+ struct max6650_data *data;
+ struct device *hwmon_dev;
+ int err;
+
+ data = devm_kzalloc(dev, sizeof(struct max6650_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = client;
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+ data->nr_fans = of_id ? (int)(uintptr_t)of_id->data : id->driver_data;
+
+ /*
+ * Initialize the max6650 chip
+ */
+ err = max6650_init_client(data, client);
+ if (err)
+ return err;
+
+ hwmon_dev = devm_hwmon_device_register_with_info(dev,
+ client->name, data,
+ &max6650_chip_info,
+ max6650_groups);
+ err = PTR_ERR_OR_ZERO(hwmon_dev);
+ if (err)
+ return err;
+
+ if (IS_ENABLED(CONFIG_THERMAL)) {
+ cooling_dev = devm_thermal_of_cooling_device_register(dev,
+ dev->of_node, client->name,
+ data, &max6650_cooling_ops);
+ if (IS_ERR(cooling_dev)) {
+ dev_warn(dev, "thermal cooling device register failed: %ld\n",
+ PTR_ERR(cooling_dev));
+ }
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id max6650_id[] = {
+ { "max6650", 1 },
+ { "max6651", 4 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max6650_id);
+
+static struct i2c_driver max6650_driver = {
+ .driver = {
+ .name = "max6650",
+ .of_match_table = of_match_ptr(max6650_dt_match),
+ },
+ .probe = max6650_probe,
+ .id_table = max6650_id,
+};
+
+module_i2c_driver(max6650_driver);
+
+MODULE_AUTHOR("Hans J. Koch");
+MODULE_DESCRIPTION("MAX6650 sensor driver");
+MODULE_LICENSE("GPL");