| /* |
| * Device driver for the i2c thermostat found on the iBook G4, Albook G4 |
| * |
| * Copyright (C) 2003, 2004 Colin Leroy, Rasmus Rohde, Benjamin Herrenschmidt |
| * |
| * Documentation from |
| * http://www.analog.com/UploadedFiles/Data_Sheets/115254175ADT7467_pra.pdf |
| * http://www.analog.com/UploadedFiles/Data_Sheets/3686221171167ADT7460_b.pdf |
| * |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/delay.h> |
| #include <linux/sched.h> |
| #include <linux/i2c.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/spinlock.h> |
| #include <linux/wait.h> |
| #include <linux/suspend.h> |
| #include <linux/kthread.h> |
| #include <linux/moduleparam.h> |
| #include <linux/freezer.h> |
| #include <linux/of_platform.h> |
| |
| #include <asm/prom.h> |
| #include <asm/machdep.h> |
| #include <asm/io.h> |
| #include <asm/system.h> |
| #include <asm/sections.h> |
| |
| #undef DEBUG |
| |
| #define CONFIG_REG 0x40 |
| #define MANUAL_MASK 0xe0 |
| #define AUTO_MASK 0x20 |
| #define INVERT_MASK 0x10 |
| |
| static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */ |
| static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */ |
| static u8 MANUAL_MODE[2] = {0x5c, 0x5d}; |
| static u8 REM_CONTROL[2] = {0x00, 0x40}; |
| static u8 FAN_SPEED[2] = {0x28, 0x2a}; |
| static u8 FAN_SPD_SET[2] = {0x30, 0x31}; |
| |
| static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */ |
| static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */ |
| static const char *sensor_location[3]; |
| |
| static int limit_adjust; |
| static int fan_speed = -1; |
| static int verbose; |
| |
| MODULE_AUTHOR("Colin Leroy <colin@colino.net>"); |
| MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and " |
| "Powerbook G4 Alu"); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(limit_adjust, int, 0644); |
| MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) " |
| "by N degrees."); |
| |
| module_param(fan_speed, int, 0644); |
| MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) " |
| "(default 64)"); |
| |
| module_param(verbose, bool, 0); |
| MODULE_PARM_DESC(verbose,"Verbose log operations " |
| "(default 0)"); |
| |
| struct thermostat { |
| struct i2c_client *clt; |
| u8 temps[3]; |
| u8 cached_temp[3]; |
| u8 initial_limits[3]; |
| u8 limits[3]; |
| int last_speed[2]; |
| int last_var[2]; |
| }; |
| |
| static enum {ADT7460, ADT7467} therm_type; |
| static int therm_bus, therm_address; |
| static struct of_device * of_dev; |
| static struct thermostat* thermostat; |
| static struct task_struct *thread_therm = NULL; |
| |
| static void write_both_fan_speed(struct thermostat *th, int speed); |
| static void write_fan_speed(struct thermostat *th, int speed, int fan); |
| |
| static int |
| write_reg(struct thermostat* th, int reg, u8 data) |
| { |
| u8 tmp[2]; |
| int rc; |
| |
| tmp[0] = reg; |
| tmp[1] = data; |
| rc = i2c_master_send(th->clt, (const char *)tmp, 2); |
| if (rc < 0) |
| return rc; |
| if (rc != 2) |
| return -ENODEV; |
| return 0; |
| } |
| |
| static int |
| read_reg(struct thermostat* th, int reg) |
| { |
| u8 reg_addr, data; |
| int rc; |
| |
| reg_addr = (u8)reg; |
| rc = i2c_master_send(th->clt, ®_addr, 1); |
| if (rc < 0) |
| return rc; |
| if (rc != 1) |
| return -ENODEV; |
| rc = i2c_master_recv(th->clt, (char *)&data, 1); |
| if (rc < 0) |
| return rc; |
| return data; |
| } |
| |
| static struct i2c_driver thermostat_driver; |
| |
| static int |
| attach_thermostat(struct i2c_adapter *adapter) |
| { |
| unsigned long bus_no; |
| struct i2c_board_info info; |
| struct i2c_client *client; |
| |
| if (strncmp(adapter->name, "uni-n", 5)) |
| return -ENODEV; |
| bus_no = simple_strtoul(adapter->name + 6, NULL, 10); |
| if (bus_no != therm_bus) |
| return -ENODEV; |
| |
| memset(&info, 0, sizeof(struct i2c_board_info)); |
| strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE); |
| info.addr = therm_address; |
| client = i2c_new_device(adapter, &info); |
| if (!client) |
| return -ENODEV; |
| |
| /* |
| * Let i2c-core delete that device on driver removal. |
| * This is safe because i2c-core holds the core_lock mutex for us. |
| */ |
| list_add_tail(&client->detected, &thermostat_driver.clients); |
| return 0; |
| } |
| |
| static int |
| remove_thermostat(struct i2c_client *client) |
| { |
| struct thermostat *th = i2c_get_clientdata(client); |
| int i; |
| |
| if (thread_therm != NULL) { |
| kthread_stop(thread_therm); |
| } |
| |
| printk(KERN_INFO "adt746x: Putting max temperatures back from " |
| "%d, %d, %d to %d, %d, %d\n", |
| th->limits[0], th->limits[1], th->limits[2], |
| th->initial_limits[0], th->initial_limits[1], |
| th->initial_limits[2]); |
| |
| for (i = 0; i < 3; i++) |
| write_reg(th, LIMIT_REG[i], th->initial_limits[i]); |
| |
| write_both_fan_speed(th, -1); |
| |
| thermostat = NULL; |
| |
| kfree(th); |
| |
| return 0; |
| } |
| |
| static int read_fan_speed(struct thermostat *th, u8 addr) |
| { |
| u8 tmp[2]; |
| u16 res; |
| |
| /* should start with low byte */ |
| tmp[1] = read_reg(th, addr); |
| tmp[0] = read_reg(th, addr + 1); |
| |
| res = tmp[1] + (tmp[0] << 8); |
| /* "a value of 0xffff means that the fan has stopped" */ |
| return (res == 0xffff ? 0 : (90000*60)/res); |
| } |
| |
| static void write_both_fan_speed(struct thermostat *th, int speed) |
| { |
| write_fan_speed(th, speed, 0); |
| if (therm_type == ADT7460) |
| write_fan_speed(th, speed, 1); |
| } |
| |
| static void write_fan_speed(struct thermostat *th, int speed, int fan) |
| { |
| u8 manual; |
| |
| if (speed > 0xff) |
| speed = 0xff; |
| else if (speed < -1) |
| speed = 0; |
| |
| if (therm_type == ADT7467 && fan == 1) |
| return; |
| |
| if (th->last_speed[fan] != speed) { |
| if (verbose) { |
| if (speed == -1) |
| printk(KERN_DEBUG "adt746x: Setting speed to automatic " |
| "for %s fan.\n", sensor_location[fan+1]); |
| else |
| printk(KERN_DEBUG "adt746x: Setting speed to %d " |
| "for %s fan.\n", speed, sensor_location[fan+1]); |
| } |
| } else |
| return; |
| |
| if (speed >= 0) { |
| manual = read_reg(th, MANUAL_MODE[fan]); |
| write_reg(th, MANUAL_MODE[fan], |
| (manual|MANUAL_MASK) & (~INVERT_MASK)); |
| write_reg(th, FAN_SPD_SET[fan], speed); |
| } else { |
| /* back to automatic */ |
| if(therm_type == ADT7460) { |
| manual = read_reg(th, |
| MANUAL_MODE[fan]) & (~MANUAL_MASK); |
| |
| write_reg(th, |
| MANUAL_MODE[fan], manual|REM_CONTROL[fan]); |
| } else { |
| manual = read_reg(th, MANUAL_MODE[fan]); |
| write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK)); |
| } |
| } |
| |
| th->last_speed[fan] = speed; |
| } |
| |
| static void read_sensors(struct thermostat *th) |
| { |
| int i = 0; |
| |
| for (i = 0; i < 3; i++) |
| th->temps[i] = read_reg(th, TEMP_REG[i]); |
| } |
| |
| #ifdef DEBUG |
| static void display_stats(struct thermostat *th) |
| { |
| if (th->temps[0] != th->cached_temp[0] |
| || th->temps[1] != th->cached_temp[1] |
| || th->temps[2] != th->cached_temp[2]) { |
| printk(KERN_INFO "adt746x: Temperature infos:" |
| " thermostats: %d,%d,%d;" |
| " limits: %d,%d,%d;" |
| " fan speed: %d RPM\n", |
| th->temps[0], th->temps[1], th->temps[2], |
| th->limits[0], th->limits[1], th->limits[2], |
| read_fan_speed(th, FAN_SPEED[0])); |
| } |
| th->cached_temp[0] = th->temps[0]; |
| th->cached_temp[1] = th->temps[1]; |
| th->cached_temp[2] = th->temps[2]; |
| } |
| #endif |
| |
| static void update_fans_speed (struct thermostat *th) |
| { |
| int lastvar = 0; /* last variation, for iBook */ |
| int i = 0; |
| |
| /* we don't care about local sensor, so we start at sensor 1 */ |
| for (i = 1; i < 3; i++) { |
| int started = 0; |
| int fan_number = (therm_type == ADT7460 && i == 2); |
| int var = th->temps[i] - th->limits[i]; |
| |
| if (var > -1) { |
| int step = (255 - fan_speed) / 7; |
| int new_speed = 0; |
| |
| /* hysteresis : change fan speed only if variation is |
| * more than two degrees */ |
| if (abs(var - th->last_var[fan_number]) < 2) |
| continue; |
| |
| started = 1; |
| new_speed = fan_speed + ((var-1)*step); |
| |
| if (new_speed < fan_speed) |
| new_speed = fan_speed; |
| if (new_speed > 255) |
| new_speed = 255; |
| |
| if (verbose) |
| printk(KERN_DEBUG "adt746x: Setting fans speed to %d " |
| "(limit exceeded by %d on %s) \n", |
| new_speed, var, |
| sensor_location[fan_number+1]); |
| write_both_fan_speed(th, new_speed); |
| th->last_var[fan_number] = var; |
| } else if (var < -2) { |
| /* don't stop fan if sensor2 is cold and sensor1 is not |
| * so cold (lastvar >= -1) */ |
| if (i == 2 && lastvar < -1) { |
| if (th->last_speed[fan_number] != 0) |
| if (verbose) |
| printk(KERN_DEBUG "adt746x: Stopping " |
| "fans.\n"); |
| write_both_fan_speed(th, 0); |
| } |
| } |
| |
| lastvar = var; |
| |
| if (started) |
| return; /* we don't want to re-stop the fan |
| * if sensor1 is heating and sensor2 is not */ |
| } |
| } |
| |
| static int monitor_task(void *arg) |
| { |
| struct thermostat* th = arg; |
| |
| set_freezable(); |
| while(!kthread_should_stop()) { |
| try_to_freeze(); |
| msleep_interruptible(2000); |
| |
| #ifndef DEBUG |
| if (fan_speed != -1) |
| read_sensors(th); |
| #else |
| read_sensors(th); |
| #endif |
| |
| if (fan_speed != -1) |
| update_fans_speed(th); |
| |
| #ifdef DEBUG |
| display_stats(th); |
| #endif |
| |
| } |
| |
| return 0; |
| } |
| |
| static void set_limit(struct thermostat *th, int i) |
| { |
| /* Set sensor1 limit higher to avoid powerdowns */ |
| th->limits[i] = default_limits_chip[i] + limit_adjust; |
| write_reg(th, LIMIT_REG[i], th->limits[i]); |
| |
| /* set our limits to normal */ |
| th->limits[i] = default_limits_local[i] + limit_adjust; |
| } |
| |
| static int probe_thermostat(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct thermostat* th; |
| int rc; |
| int i; |
| |
| if (thermostat) |
| return 0; |
| |
| th = kzalloc(sizeof(struct thermostat), GFP_KERNEL); |
| if (!th) |
| return -ENOMEM; |
| |
| i2c_set_clientdata(client, th); |
| th->clt = client; |
| |
| rc = read_reg(th, CONFIG_REG); |
| if (rc < 0) { |
| dev_err(&client->dev, "Thermostat failed to read config!\n"); |
| kfree(th); |
| return -ENODEV; |
| } |
| |
| /* force manual control to start the fan quieter */ |
| if (fan_speed == -1) |
| fan_speed = 64; |
| |
| if(therm_type == ADT7460) { |
| printk(KERN_INFO "adt746x: ADT7460 initializing\n"); |
| /* The 7460 needs to be started explicitly */ |
| write_reg(th, CONFIG_REG, 1); |
| } else |
| printk(KERN_INFO "adt746x: ADT7467 initializing\n"); |
| |
| for (i = 0; i < 3; i++) { |
| th->initial_limits[i] = read_reg(th, LIMIT_REG[i]); |
| set_limit(th, i); |
| } |
| |
| printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d" |
| " to %d, %d, %d\n", |
| th->initial_limits[0], th->initial_limits[1], |
| th->initial_limits[2], th->limits[0], th->limits[1], |
| th->limits[2]); |
| |
| thermostat = th; |
| |
| /* be sure to really write fan speed the first time */ |
| th->last_speed[0] = -2; |
| th->last_speed[1] = -2; |
| th->last_var[0] = -80; |
| th->last_var[1] = -80; |
| |
| if (fan_speed != -1) { |
| /* manual mode, stop fans */ |
| write_both_fan_speed(th, 0); |
| } else { |
| /* automatic mode */ |
| write_both_fan_speed(th, -1); |
| } |
| |
| thread_therm = kthread_run(monitor_task, th, "kfand"); |
| |
| if (thread_therm == ERR_PTR(-ENOMEM)) { |
| printk(KERN_INFO "adt746x: Kthread creation failed\n"); |
| thread_therm = NULL; |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id therm_adt746x_id[] = { |
| { "therm_adt746x", 0 }, |
| { } |
| }; |
| |
| static struct i2c_driver thermostat_driver = { |
| .driver = { |
| .name = "therm_adt746x", |
| }, |
| .attach_adapter = attach_thermostat, |
| .probe = probe_thermostat, |
| .remove = remove_thermostat, |
| .id_table = therm_adt746x_id, |
| }; |
| |
| /* |
| * Now, unfortunately, sysfs doesn't give us a nice void * we could |
| * pass around to the attribute functions, so we don't really have |
| * choice but implement a bunch of them... |
| * |
| * FIXME, it does now... |
| */ |
| #define BUILD_SHOW_FUNC_INT(name, data) \ |
| static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| return sprintf(buf, "%d\n", data); \ |
| } |
| |
| #define BUILD_SHOW_FUNC_STR(name, data) \ |
| static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| return sprintf(buf, "%s\n", data); \ |
| } |
| |
| #define BUILD_SHOW_FUNC_FAN(name, data) \ |
| static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| return sprintf(buf, "%d (%d rpm)\n", \ |
| thermostat->last_speed[data], \ |
| read_fan_speed(thermostat, FAN_SPEED[data]) \ |
| ); \ |
| } |
| |
| #define BUILD_STORE_FUNC_DEG(name, data) \ |
| static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
| { \ |
| int val; \ |
| int i; \ |
| val = simple_strtol(buf, NULL, 10); \ |
| printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \ |
| limit_adjust = val; \ |
| for (i=0; i < 3; i++) \ |
| set_limit(thermostat, i); \ |
| return n; \ |
| } |
| |
| #define BUILD_STORE_FUNC_INT(name, data) \ |
| static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
| { \ |
| int val; \ |
| val = simple_strtol(buf, NULL, 10); \ |
| if (val < 0 || val > 255) \ |
| return -EINVAL; \ |
| printk(KERN_INFO "Setting specified fan speed to %d\n", val); \ |
| data = val; \ |
| return n; \ |
| } |
| |
| BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1]))) |
| BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2]))) |
| BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1]) |
| BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2]) |
| BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1]) |
| BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2]) |
| |
| BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed) |
| BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0) |
| BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1) |
| |
| BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed) |
| BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust) |
| BUILD_STORE_FUNC_DEG(limit_adjust, thermostat) |
| |
| static DEVICE_ATTR(sensor1_temperature, S_IRUGO, |
| show_sensor1_temperature,NULL); |
| static DEVICE_ATTR(sensor2_temperature, S_IRUGO, |
| show_sensor2_temperature,NULL); |
| static DEVICE_ATTR(sensor1_limit, S_IRUGO, |
| show_sensor1_limit, NULL); |
| static DEVICE_ATTR(sensor2_limit, S_IRUGO, |
| show_sensor2_limit, NULL); |
| static DEVICE_ATTR(sensor1_location, S_IRUGO, |
| show_sensor1_location, NULL); |
| static DEVICE_ATTR(sensor2_location, S_IRUGO, |
| show_sensor2_location, NULL); |
| |
| static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, |
| show_specified_fan_speed,store_specified_fan_speed); |
| |
| static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO, |
| show_sensor1_fan_speed, NULL); |
| static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO, |
| show_sensor2_fan_speed, NULL); |
| |
| static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, |
| show_limit_adjust, store_limit_adjust); |
| |
| |
| static int __init |
| thermostat_init(void) |
| { |
| struct device_node* np; |
| const u32 *prop; |
| int i = 0, offset = 0; |
| int err; |
| |
| np = of_find_node_by_name(NULL, "fan"); |
| if (!np) |
| return -ENODEV; |
| if (of_device_is_compatible(np, "adt7460")) |
| therm_type = ADT7460; |
| else if (of_device_is_compatible(np, "adt7467")) |
| therm_type = ADT7467; |
| else { |
| of_node_put(np); |
| return -ENODEV; |
| } |
| |
| prop = of_get_property(np, "hwsensor-params-version", NULL); |
| printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop, |
| (*prop == 1)?"":"un"); |
| if (*prop != 1) { |
| of_node_put(np); |
| return -ENODEV; |
| } |
| |
| prop = of_get_property(np, "reg", NULL); |
| if (!prop) { |
| of_node_put(np); |
| return -ENODEV; |
| } |
| |
| /* look for bus either by path or using "reg" */ |
| if (strstr(np->full_name, "/i2c-bus@") != NULL) { |
| const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9); |
| therm_bus = tmp_bus[0]-'0'; |
| } else { |
| therm_bus = ((*prop) >> 8) & 0x0f; |
| } |
| |
| therm_address = ((*prop) & 0xff) >> 1; |
| |
| printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, " |
| "limit_adjust: %d, fan_speed: %d\n", |
| therm_bus, therm_address, limit_adjust, fan_speed); |
| |
| if (of_get_property(np, "hwsensor-location", NULL)) { |
| for (i = 0; i < 3; i++) { |
| sensor_location[i] = of_get_property(np, |
| "hwsensor-location", NULL) + offset; |
| |
| if (sensor_location[i] == NULL) |
| sensor_location[i] = ""; |
| |
| printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]); |
| offset += strlen(sensor_location[i]) + 1; |
| } |
| } else { |
| sensor_location[0] = "?"; |
| sensor_location[1] = "?"; |
| sensor_location[2] = "?"; |
| } |
| |
| of_dev = of_platform_device_create(np, "temperatures", NULL); |
| of_node_put(np); |
| |
| if (of_dev == NULL) { |
| printk(KERN_ERR "Can't register temperatures device !\n"); |
| return -ENODEV; |
| } |
| |
| err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
| err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature); |
| err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit); |
| err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_limit); |
| err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_location); |
| err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_location); |
| err |= device_create_file(&of_dev->dev, &dev_attr_limit_adjust); |
| err |= device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed); |
| err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
| if(therm_type == ADT7460) |
| err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed); |
| if (err) |
| printk(KERN_WARNING |
| "Failed to create tempertaure attribute file(s).\n"); |
| |
| #ifndef CONFIG_I2C_POWERMAC |
| request_module("i2c-powermac"); |
| #endif |
| |
| return i2c_add_driver(&thermostat_driver); |
| } |
| |
| static void __exit |
| thermostat_exit(void) |
| { |
| if (of_dev) { |
| device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
| device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature); |
| device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit); |
| device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit); |
| device_remove_file(&of_dev->dev, &dev_attr_sensor1_location); |
| device_remove_file(&of_dev->dev, &dev_attr_sensor2_location); |
| device_remove_file(&of_dev->dev, &dev_attr_limit_adjust); |
| device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed); |
| device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
| |
| if(therm_type == ADT7460) |
| device_remove_file(&of_dev->dev, |
| &dev_attr_sensor2_fan_speed); |
| |
| of_device_unregister(of_dev); |
| } |
| i2c_del_driver(&thermostat_driver); |
| } |
| |
| module_init(thermostat_init); |
| module_exit(thermostat_exit); |