Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Device driver for the i2c thermostat found on the iBook G4, Albook G4 |
| 3 | * |
| 4 | * Copyright (C) 2003, 2004 Colin Leroy, Rasmus Rohde, Benjamin Herrenschmidt |
| 5 | * |
| 6 | * Documentation from |
| 7 | * http://www.analog.com/UploadedFiles/Data_Sheets/115254175ADT7467_pra.pdf |
| 8 | * http://www.analog.com/UploadedFiles/Data_Sheets/3686221171167ADT7460_b.pdf |
| 9 | * |
| 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/types.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/errno.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/sched.h> |
| 18 | #include <linux/i2c.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/spinlock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/wait.h> |
| 23 | #include <linux/suspend.h> |
| 24 | #include <linux/kthread.h> |
| 25 | #include <linux/moduleparam.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 26 | #include <linux/freezer.h> |
Stephen Rothwell | ad9e05a | 2008-05-23 16:27:02 +1000 | [diff] [blame] | 27 | #include <linux/of_platform.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <asm/prom.h> |
| 30 | #include <asm/machdep.h> |
| 31 | #include <asm/io.h> |
| 32 | #include <asm/system.h> |
| 33 | #include <asm/sections.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
| 35 | #undef DEBUG |
| 36 | |
| 37 | #define CONFIG_REG 0x40 |
| 38 | #define MANUAL_MASK 0xe0 |
| 39 | #define AUTO_MASK 0x20 |
Michel Dänzer | 0512a9a | 2009-05-22 10:59:10 +0000 | [diff] [blame] | 40 | #define INVERT_MASK 0x10 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 42 | static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */ |
| 43 | static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | static u8 MANUAL_MODE[2] = {0x5c, 0x5d}; |
| 45 | static u8 REM_CONTROL[2] = {0x00, 0x40}; |
| 46 | static u8 FAN_SPEED[2] = {0x28, 0x2a}; |
| 47 | static u8 FAN_SPD_SET[2] = {0x30, 0x31}; |
| 48 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 49 | static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */ |
| 50 | static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */ |
Olaf Hering | 8727585 | 2007-02-10 21:35:12 +0100 | [diff] [blame] | 51 | static const char *sensor_location[3]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Olaf Hering | 8727585 | 2007-02-10 21:35:12 +0100 | [diff] [blame] | 53 | static int limit_adjust; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | static int fan_speed = -1; |
Olaf Hering | 8727585 | 2007-02-10 21:35:12 +0100 | [diff] [blame] | 55 | static int verbose; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | MODULE_AUTHOR("Colin Leroy <colin@colino.net>"); |
| 58 | MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and " |
| 59 | "Powerbook G4 Alu"); |
| 60 | MODULE_LICENSE("GPL"); |
| 61 | |
| 62 | module_param(limit_adjust, int, 0644); |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 63 | MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | "by N degrees."); |
| 65 | |
| 66 | module_param(fan_speed, int, 0644); |
| 67 | MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) " |
| 68 | "(default 64)"); |
| 69 | |
Ben Collins | 9f6d4b0 | 2006-01-06 00:11:40 -0800 | [diff] [blame] | 70 | module_param(verbose, bool, 0); |
| 71 | MODULE_PARM_DESC(verbose,"Verbose log operations " |
| 72 | "(default 0)"); |
| 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | struct thermostat { |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 75 | struct i2c_client *clt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | u8 temps[3]; |
| 77 | u8 cached_temp[3]; |
| 78 | u8 initial_limits[3]; |
| 79 | u8 limits[3]; |
| 80 | int last_speed[2]; |
| 81 | int last_var[2]; |
Darrick J. Wong | 1496e89 | 2009-12-03 16:19:59 +0000 | [diff] [blame] | 82 | int pwm_inv[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | }; |
| 84 | |
| 85 | static enum {ADT7460, ADT7467} therm_type; |
| 86 | static int therm_bus, therm_address; |
Grant Likely | 2dc1158 | 2010-08-06 09:25:50 -0600 | [diff] [blame] | 87 | static struct platform_device * of_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | static struct thermostat* thermostat; |
| 89 | static struct task_struct *thread_therm = NULL; |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | static void write_both_fan_speed(struct thermostat *th, int speed); |
| 92 | static void write_fan_speed(struct thermostat *th, int speed, int fan); |
Jean Delvare | 33a470f | 2010-01-31 04:00:30 +0000 | [diff] [blame] | 93 | static void thermostat_create_files(void); |
| 94 | static void thermostat_remove_files(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | static int |
| 97 | write_reg(struct thermostat* th, int reg, u8 data) |
| 98 | { |
| 99 | u8 tmp[2]; |
| 100 | int rc; |
| 101 | |
| 102 | tmp[0] = reg; |
| 103 | tmp[1] = data; |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 104 | rc = i2c_master_send(th->clt, (const char *)tmp, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | if (rc < 0) |
| 106 | return rc; |
| 107 | if (rc != 2) |
| 108 | return -ENODEV; |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static int |
| 113 | read_reg(struct thermostat* th, int reg) |
| 114 | { |
| 115 | u8 reg_addr, data; |
| 116 | int rc; |
| 117 | |
| 118 | reg_addr = (u8)reg; |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 119 | rc = i2c_master_send(th->clt, ®_addr, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | if (rc < 0) |
| 121 | return rc; |
| 122 | if (rc != 1) |
| 123 | return -ENODEV; |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 124 | rc = i2c_master_recv(th->clt, (char *)&data, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | if (rc < 0) |
| 126 | return rc; |
| 127 | return data; |
| 128 | } |
| 129 | |
Jean Delvare | 6f6b35e | 2009-10-04 22:53:46 +0200 | [diff] [blame] | 130 | static struct i2c_driver thermostat_driver; |
| 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | static int |
| 133 | attach_thermostat(struct i2c_adapter *adapter) |
| 134 | { |
| 135 | unsigned long bus_no; |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 136 | struct i2c_board_info info; |
| 137 | struct i2c_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | if (strncmp(adapter->name, "uni-n", 5)) |
| 140 | return -ENODEV; |
| 141 | bus_no = simple_strtoul(adapter->name + 6, NULL, 10); |
| 142 | if (bus_no != therm_bus) |
| 143 | return -ENODEV; |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 144 | |
| 145 | memset(&info, 0, sizeof(struct i2c_board_info)); |
| 146 | strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE); |
| 147 | info.addr = therm_address; |
| 148 | client = i2c_new_device(adapter, &info); |
| 149 | if (!client) |
| 150 | return -ENODEV; |
| 151 | |
| 152 | /* |
| 153 | * Let i2c-core delete that device on driver removal. |
| 154 | * This is safe because i2c-core holds the core_lock mutex for us. |
| 155 | */ |
Jean Delvare | 6f6b35e | 2009-10-04 22:53:46 +0200 | [diff] [blame] | 156 | list_add_tail(&client->detected, &thermostat_driver.clients); |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 157 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | static int |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 161 | remove_thermostat(struct i2c_client *client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 163 | struct thermostat *th = i2c_get_clientdata(client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | int i; |
| 165 | |
Jean Delvare | 33a470f | 2010-01-31 04:00:30 +0000 | [diff] [blame] | 166 | thermostat_remove_files(); |
| 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | if (thread_therm != NULL) { |
| 169 | kthread_stop(thread_therm); |
| 170 | } |
Ben Collins | 9f6d4b0 | 2006-01-06 00:11:40 -0800 | [diff] [blame] | 171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | printk(KERN_INFO "adt746x: Putting max temperatures back from " |
| 173 | "%d, %d, %d to %d, %d, %d\n", |
| 174 | th->limits[0], th->limits[1], th->limits[2], |
| 175 | th->initial_limits[0], th->initial_limits[1], |
| 176 | th->initial_limits[2]); |
Ben Collins | 9f6d4b0 | 2006-01-06 00:11:40 -0800 | [diff] [blame] | 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | for (i = 0; i < 3; i++) |
| 179 | write_reg(th, LIMIT_REG[i], th->initial_limits[i]); |
| 180 | |
| 181 | write_both_fan_speed(th, -1); |
| 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | thermostat = NULL; |
| 184 | |
| 185 | kfree(th); |
| 186 | |
| 187 | return 0; |
| 188 | } |
| 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | static int read_fan_speed(struct thermostat *th, u8 addr) |
| 191 | { |
| 192 | u8 tmp[2]; |
| 193 | u16 res; |
| 194 | |
| 195 | /* should start with low byte */ |
| 196 | tmp[1] = read_reg(th, addr); |
| 197 | tmp[0] = read_reg(th, addr + 1); |
| 198 | |
| 199 | res = tmp[1] + (tmp[0] << 8); |
| 200 | /* "a value of 0xffff means that the fan has stopped" */ |
| 201 | return (res == 0xffff ? 0 : (90000*60)/res); |
| 202 | } |
| 203 | |
| 204 | static void write_both_fan_speed(struct thermostat *th, int speed) |
| 205 | { |
| 206 | write_fan_speed(th, speed, 0); |
| 207 | if (therm_type == ADT7460) |
| 208 | write_fan_speed(th, speed, 1); |
| 209 | } |
| 210 | |
| 211 | static void write_fan_speed(struct thermostat *th, int speed, int fan) |
| 212 | { |
| 213 | u8 manual; |
| 214 | |
| 215 | if (speed > 0xff) |
| 216 | speed = 0xff; |
| 217 | else if (speed < -1) |
| 218 | speed = 0; |
| 219 | |
| 220 | if (therm_type == ADT7467 && fan == 1) |
| 221 | return; |
| 222 | |
| 223 | if (th->last_speed[fan] != speed) { |
Ben Collins | 9f6d4b0 | 2006-01-06 00:11:40 -0800 | [diff] [blame] | 224 | if (verbose) { |
| 225 | if (speed == -1) |
| 226 | printk(KERN_DEBUG "adt746x: Setting speed to automatic " |
| 227 | "for %s fan.\n", sensor_location[fan+1]); |
| 228 | else |
| 229 | printk(KERN_DEBUG "adt746x: Setting speed to %d " |
| 230 | "for %s fan.\n", speed, sensor_location[fan+1]); |
| 231 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } else |
| 233 | return; |
| 234 | |
| 235 | if (speed >= 0) { |
| 236 | manual = read_reg(th, MANUAL_MODE[fan]); |
Darrick J. Wong | 1496e89 | 2009-12-03 16:19:59 +0000 | [diff] [blame] | 237 | manual &= ~INVERT_MASK; |
Michel Dänzer | 0512a9a | 2009-05-22 10:59:10 +0000 | [diff] [blame] | 238 | write_reg(th, MANUAL_MODE[fan], |
Darrick J. Wong | 1496e89 | 2009-12-03 16:19:59 +0000 | [diff] [blame] | 239 | manual | MANUAL_MASK | th->pwm_inv[fan]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | write_reg(th, FAN_SPD_SET[fan], speed); |
| 241 | } else { |
| 242 | /* back to automatic */ |
| 243 | if(therm_type == ADT7460) { |
| 244 | manual = read_reg(th, |
| 245 | MANUAL_MODE[fan]) & (~MANUAL_MASK); |
Darrick J. Wong | 1496e89 | 2009-12-03 16:19:59 +0000 | [diff] [blame] | 246 | manual &= ~INVERT_MASK; |
| 247 | manual |= th->pwm_inv[fan]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | write_reg(th, |
| 249 | MANUAL_MODE[fan], manual|REM_CONTROL[fan]); |
| 250 | } else { |
| 251 | manual = read_reg(th, MANUAL_MODE[fan]); |
Darrick J. Wong | 1496e89 | 2009-12-03 16:19:59 +0000 | [diff] [blame] | 252 | manual &= ~INVERT_MASK; |
| 253 | manual |= th->pwm_inv[fan]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK)); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | th->last_speed[fan] = speed; |
| 259 | } |
| 260 | |
| 261 | static void read_sensors(struct thermostat *th) |
| 262 | { |
| 263 | int i = 0; |
| 264 | |
| 265 | for (i = 0; i < 3; i++) |
| 266 | th->temps[i] = read_reg(th, TEMP_REG[i]); |
| 267 | } |
| 268 | |
| 269 | #ifdef DEBUG |
| 270 | static void display_stats(struct thermostat *th) |
| 271 | { |
| 272 | if (th->temps[0] != th->cached_temp[0] |
| 273 | || th->temps[1] != th->cached_temp[1] |
| 274 | || th->temps[2] != th->cached_temp[2]) { |
| 275 | printk(KERN_INFO "adt746x: Temperature infos:" |
| 276 | " thermostats: %d,%d,%d;" |
| 277 | " limits: %d,%d,%d;" |
| 278 | " fan speed: %d RPM\n", |
| 279 | th->temps[0], th->temps[1], th->temps[2], |
| 280 | th->limits[0], th->limits[1], th->limits[2], |
| 281 | read_fan_speed(th, FAN_SPEED[0])); |
| 282 | } |
| 283 | th->cached_temp[0] = th->temps[0]; |
| 284 | th->cached_temp[1] = th->temps[1]; |
| 285 | th->cached_temp[2] = th->temps[2]; |
| 286 | } |
| 287 | #endif |
| 288 | |
| 289 | static void update_fans_speed (struct thermostat *th) |
| 290 | { |
| 291 | int lastvar = 0; /* last variation, for iBook */ |
| 292 | int i = 0; |
| 293 | |
| 294 | /* we don't care about local sensor, so we start at sensor 1 */ |
| 295 | for (i = 1; i < 3; i++) { |
| 296 | int started = 0; |
| 297 | int fan_number = (therm_type == ADT7460 && i == 2); |
| 298 | int var = th->temps[i] - th->limits[i]; |
| 299 | |
| 300 | if (var > -1) { |
| 301 | int step = (255 - fan_speed) / 7; |
| 302 | int new_speed = 0; |
| 303 | |
| 304 | /* hysteresis : change fan speed only if variation is |
| 305 | * more than two degrees */ |
| 306 | if (abs(var - th->last_var[fan_number]) < 2) |
| 307 | continue; |
| 308 | |
| 309 | started = 1; |
| 310 | new_speed = fan_speed + ((var-1)*step); |
| 311 | |
| 312 | if (new_speed < fan_speed) |
| 313 | new_speed = fan_speed; |
| 314 | if (new_speed > 255) |
| 315 | new_speed = 255; |
| 316 | |
Ben Collins | 9f6d4b0 | 2006-01-06 00:11:40 -0800 | [diff] [blame] | 317 | if (verbose) |
| 318 | printk(KERN_DEBUG "adt746x: Setting fans speed to %d " |
Frans Pop | 8354be9 | 2010-02-06 07:47:20 +0000 | [diff] [blame] | 319 | "(limit exceeded by %d on %s)\n", |
Ben Collins | 9f6d4b0 | 2006-01-06 00:11:40 -0800 | [diff] [blame] | 320 | new_speed, var, |
| 321 | sensor_location[fan_number+1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | write_both_fan_speed(th, new_speed); |
| 323 | th->last_var[fan_number] = var; |
| 324 | } else if (var < -2) { |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 325 | /* don't stop fan if sensor2 is cold and sensor1 is not |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | * so cold (lastvar >= -1) */ |
| 327 | if (i == 2 && lastvar < -1) { |
| 328 | if (th->last_speed[fan_number] != 0) |
Ben Collins | 9f6d4b0 | 2006-01-06 00:11:40 -0800 | [diff] [blame] | 329 | if (verbose) |
| 330 | printk(KERN_DEBUG "adt746x: Stopping " |
| 331 | "fans.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | write_both_fan_speed(th, 0); |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | lastvar = var; |
| 337 | |
| 338 | if (started) |
| 339 | return; /* we don't want to re-stop the fan |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 340 | * if sensor1 is heating and sensor2 is not */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } |
| 342 | } |
| 343 | |
| 344 | static int monitor_task(void *arg) |
| 345 | { |
| 346 | struct thermostat* th = arg; |
| 347 | |
Rafael J. Wysocki | 8314418 | 2007-07-17 04:03:35 -0700 | [diff] [blame] | 348 | set_freezable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | while(!kthread_should_stop()) { |
Christoph Lameter | 3e1d1d2 | 2005-06-24 23:13:50 -0700 | [diff] [blame] | 350 | try_to_freeze(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | msleep_interruptible(2000); |
| 352 | |
| 353 | #ifndef DEBUG |
| 354 | if (fan_speed != -1) |
| 355 | read_sensors(th); |
| 356 | #else |
| 357 | read_sensors(th); |
| 358 | #endif |
| 359 | |
| 360 | if (fan_speed != -1) |
| 361 | update_fans_speed(th); |
| 362 | |
| 363 | #ifdef DEBUG |
| 364 | display_stats(th); |
| 365 | #endif |
| 366 | |
| 367 | } |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static void set_limit(struct thermostat *th, int i) |
| 373 | { |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 374 | /* Set sensor1 limit higher to avoid powerdowns */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | th->limits[i] = default_limits_chip[i] + limit_adjust; |
| 376 | write_reg(th, LIMIT_REG[i], th->limits[i]); |
| 377 | |
| 378 | /* set our limits to normal */ |
| 379 | th->limits[i] = default_limits_local[i] + limit_adjust; |
| 380 | } |
| 381 | |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 382 | static int probe_thermostat(struct i2c_client *client, |
| 383 | const struct i2c_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
| 385 | struct thermostat* th; |
| 386 | int rc; |
| 387 | int i; |
| 388 | |
| 389 | if (thermostat) |
| 390 | return 0; |
| 391 | |
Mariusz Kozlowski | cc61f95 | 2007-08-01 08:10:03 +1000 | [diff] [blame] | 392 | th = kzalloc(sizeof(struct thermostat), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | if (!th) |
| 394 | return -ENOMEM; |
| 395 | |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 396 | i2c_set_clientdata(client, th); |
| 397 | th->clt = client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Jean Delvare | 99ca177a | 2009-10-14 05:31:32 +0000 | [diff] [blame] | 399 | rc = read_reg(th, CONFIG_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | if (rc < 0) { |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 401 | dev_err(&client->dev, "Thermostat failed to read config!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | kfree(th); |
| 403 | return -ENODEV; |
| 404 | } |
| 405 | |
| 406 | /* force manual control to start the fan quieter */ |
| 407 | if (fan_speed == -1) |
| 408 | fan_speed = 64; |
| 409 | |
| 410 | if(therm_type == ADT7460) { |
| 411 | printk(KERN_INFO "adt746x: ADT7460 initializing\n"); |
| 412 | /* The 7460 needs to be started explicitly */ |
| 413 | write_reg(th, CONFIG_REG, 1); |
| 414 | } else |
| 415 | printk(KERN_INFO "adt746x: ADT7467 initializing\n"); |
| 416 | |
| 417 | for (i = 0; i < 3; i++) { |
| 418 | th->initial_limits[i] = read_reg(th, LIMIT_REG[i]); |
| 419 | set_limit(th, i); |
| 420 | } |
Ben Collins | 9f6d4b0 | 2006-01-06 00:11:40 -0800 | [diff] [blame] | 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d" |
| 423 | " to %d, %d, %d\n", |
| 424 | th->initial_limits[0], th->initial_limits[1], |
| 425 | th->initial_limits[2], th->limits[0], th->limits[1], |
| 426 | th->limits[2]); |
| 427 | |
| 428 | thermostat = th; |
| 429 | |
Darrick J. Wong | 1496e89 | 2009-12-03 16:19:59 +0000 | [diff] [blame] | 430 | /* record invert bit status because fw can corrupt it after suspend */ |
| 431 | th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK; |
| 432 | th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK; |
| 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | /* be sure to really write fan speed the first time */ |
| 435 | th->last_speed[0] = -2; |
| 436 | th->last_speed[1] = -2; |
| 437 | th->last_var[0] = -80; |
| 438 | th->last_var[1] = -80; |
| 439 | |
| 440 | if (fan_speed != -1) { |
| 441 | /* manual mode, stop fans */ |
| 442 | write_both_fan_speed(th, 0); |
| 443 | } else { |
| 444 | /* automatic mode */ |
| 445 | write_both_fan_speed(th, -1); |
| 446 | } |
| 447 | |
| 448 | thread_therm = kthread_run(monitor_task, th, "kfand"); |
| 449 | |
| 450 | if (thread_therm == ERR_PTR(-ENOMEM)) { |
| 451 | printk(KERN_INFO "adt746x: Kthread creation failed\n"); |
| 452 | thread_therm = NULL; |
| 453 | return -ENOMEM; |
| 454 | } |
| 455 | |
Jean Delvare | 33a470f | 2010-01-31 04:00:30 +0000 | [diff] [blame] | 456 | thermostat_create_files(); |
| 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | return 0; |
| 459 | } |
| 460 | |
Jean Delvare | 2e613e7 | 2009-06-15 18:01:51 +0200 | [diff] [blame] | 461 | static const struct i2c_device_id therm_adt746x_id[] = { |
| 462 | { "therm_adt746x", 0 }, |
| 463 | { } |
| 464 | }; |
| 465 | |
| 466 | static struct i2c_driver thermostat_driver = { |
| 467 | .driver = { |
| 468 | .name = "therm_adt746x", |
| 469 | }, |
| 470 | .attach_adapter = attach_thermostat, |
| 471 | .probe = probe_thermostat, |
| 472 | .remove = remove_thermostat, |
| 473 | .id_table = therm_adt746x_id, |
| 474 | }; |
| 475 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | /* |
| 477 | * Now, unfortunately, sysfs doesn't give us a nice void * we could |
| 478 | * pass around to the attribute functions, so we don't really have |
| 479 | * choice but implement a bunch of them... |
| 480 | * |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 481 | * FIXME, it does now... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | */ |
| 483 | #define BUILD_SHOW_FUNC_INT(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 484 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | { \ |
| 486 | return sprintf(buf, "%d\n", data); \ |
| 487 | } |
| 488 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 489 | #define BUILD_SHOW_FUNC_STR(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 490 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 491 | { \ |
| 492 | return sprintf(buf, "%s\n", data); \ |
| 493 | } |
| 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | #define BUILD_SHOW_FUNC_FAN(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 496 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { \ |
| 498 | return sprintf(buf, "%d (%d rpm)\n", \ |
| 499 | thermostat->last_speed[data], \ |
| 500 | read_fan_speed(thermostat, FAN_SPEED[data]) \ |
| 501 | ); \ |
| 502 | } |
| 503 | |
| 504 | #define BUILD_STORE_FUNC_DEG(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 505 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | { \ |
| 507 | int val; \ |
| 508 | int i; \ |
| 509 | val = simple_strtol(buf, NULL, 10); \ |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 510 | printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | limit_adjust = val; \ |
| 512 | for (i=0; i < 3; i++) \ |
| 513 | set_limit(thermostat, i); \ |
| 514 | return n; \ |
| 515 | } |
| 516 | |
| 517 | #define BUILD_STORE_FUNC_INT(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 518 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | { \ |
roel kluin | 2e74778 | 2009-01-18 02:03:47 +0000 | [diff] [blame] | 520 | int val; \ |
| 521 | val = simple_strtol(buf, NULL, 10); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | if (val < 0 || val > 255) \ |
| 523 | return -EINVAL; \ |
| 524 | printk(KERN_INFO "Setting specified fan speed to %d\n", val); \ |
| 525 | data = val; \ |
| 526 | return n; \ |
| 527 | } |
| 528 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 529 | BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1]))) |
| 530 | BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2]))) |
| 531 | BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1]) |
| 532 | BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2]) |
| 533 | BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1]) |
| 534 | BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
| 536 | BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed) |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 537 | BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0) |
| 538 | BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
| 540 | BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed) |
| 541 | BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust) |
| 542 | BUILD_STORE_FUNC_DEG(limit_adjust, thermostat) |
| 543 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 544 | static DEVICE_ATTR(sensor1_temperature, S_IRUGO, |
| 545 | show_sensor1_temperature,NULL); |
| 546 | static DEVICE_ATTR(sensor2_temperature, S_IRUGO, |
| 547 | show_sensor2_temperature,NULL); |
| 548 | static DEVICE_ATTR(sensor1_limit, S_IRUGO, |
| 549 | show_sensor1_limit, NULL); |
| 550 | static DEVICE_ATTR(sensor2_limit, S_IRUGO, |
| 551 | show_sensor2_limit, NULL); |
| 552 | static DEVICE_ATTR(sensor1_location, S_IRUGO, |
| 553 | show_sensor1_location, NULL); |
| 554 | static DEVICE_ATTR(sensor2_location, S_IRUGO, |
| 555 | show_sensor2_location, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
| 557 | static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, |
| 558 | show_specified_fan_speed,store_specified_fan_speed); |
| 559 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 560 | static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO, |
| 561 | show_sensor1_fan_speed, NULL); |
| 562 | static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO, |
| 563 | show_sensor2_fan_speed, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, |
| 566 | show_limit_adjust, store_limit_adjust); |
| 567 | |
| 568 | |
| 569 | static int __init |
| 570 | thermostat_init(void) |
| 571 | { |
| 572 | struct device_node* np; |
Jeremy Kerr | 018a3d1 | 2006-07-12 15:40:29 +1000 | [diff] [blame] | 573 | const u32 *prop; |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 574 | int i = 0, offset = 0; |
Nicolas Palix | 44ea9c8 | 2009-01-06 14:41:35 -0800 | [diff] [blame] | 575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | np = of_find_node_by_name(NULL, "fan"); |
| 577 | if (!np) |
| 578 | return -ENODEV; |
Stephen Rothwell | 55b61fe | 2007-05-03 17:26:52 +1000 | [diff] [blame] | 579 | if (of_device_is_compatible(np, "adt7460")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | therm_type = ADT7460; |
Stephen Rothwell | 55b61fe | 2007-05-03 17:26:52 +1000 | [diff] [blame] | 581 | else if (of_device_is_compatible(np, "adt7467")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | therm_type = ADT7467; |
Julia Lawall | 958a65f | 2008-06-09 22:21:51 +1000 | [diff] [blame] | 583 | else { |
| 584 | of_node_put(np); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | return -ENODEV; |
Julia Lawall | 958a65f | 2008-06-09 22:21:51 +1000 | [diff] [blame] | 586 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
Stephen Rothwell | 01b2726 | 2007-04-27 13:41:15 +1000 | [diff] [blame] | 588 | prop = of_get_property(np, "hwsensor-params-version", NULL); |
Colin Leroy | a8bacec | 2005-05-25 12:31:34 -0700 | [diff] [blame] | 589 | printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop, |
| 590 | (*prop == 1)?"":"un"); |
Julia Lawall | 958a65f | 2008-06-09 22:21:51 +1000 | [diff] [blame] | 591 | if (*prop != 1) { |
| 592 | of_node_put(np); |
Colin Leroy | a8bacec | 2005-05-25 12:31:34 -0700 | [diff] [blame] | 593 | return -ENODEV; |
Julia Lawall | 958a65f | 2008-06-09 22:21:51 +1000 | [diff] [blame] | 594 | } |
Colin Leroy | a8bacec | 2005-05-25 12:31:34 -0700 | [diff] [blame] | 595 | |
Stephen Rothwell | 01b2726 | 2007-04-27 13:41:15 +1000 | [diff] [blame] | 596 | prop = of_get_property(np, "reg", NULL); |
Julia Lawall | 958a65f | 2008-06-09 22:21:51 +1000 | [diff] [blame] | 597 | if (!prop) { |
| 598 | of_node_put(np); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | return -ENODEV; |
Julia Lawall | 958a65f | 2008-06-09 22:21:51 +1000 | [diff] [blame] | 600 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
| 602 | /* look for bus either by path or using "reg" */ |
| 603 | if (strstr(np->full_name, "/i2c-bus@") != NULL) { |
| 604 | const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9); |
| 605 | therm_bus = tmp_bus[0]-'0'; |
| 606 | } else { |
| 607 | therm_bus = ((*prop) >> 8) & 0x0f; |
| 608 | } |
| 609 | |
| 610 | therm_address = ((*prop) & 0xff) >> 1; |
| 611 | |
| 612 | printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, " |
| 613 | "limit_adjust: %d, fan_speed: %d\n", |
| 614 | therm_bus, therm_address, limit_adjust, fan_speed); |
| 615 | |
Stephen Rothwell | 01b2726 | 2007-04-27 13:41:15 +1000 | [diff] [blame] | 616 | if (of_get_property(np, "hwsensor-location", NULL)) { |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 617 | for (i = 0; i < 3; i++) { |
Stephen Rothwell | 01b2726 | 2007-04-27 13:41:15 +1000 | [diff] [blame] | 618 | sensor_location[i] = of_get_property(np, |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 619 | "hwsensor-location", NULL) + offset; |
| 620 | |
| 621 | if (sensor_location[i] == NULL) |
| 622 | sensor_location[i] = ""; |
| 623 | |
| 624 | printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]); |
| 625 | offset += strlen(sensor_location[i]) + 1; |
| 626 | } |
| 627 | } else { |
| 628 | sensor_location[0] = "?"; |
| 629 | sensor_location[1] = "?"; |
| 630 | sensor_location[2] = "?"; |
| 631 | } |
| 632 | |
Benjamin Herrenschmidt | 0365ba7 | 2005-09-22 21:44:06 -0700 | [diff] [blame] | 633 | of_dev = of_platform_device_create(np, "temperatures", NULL); |
Nicolas Palix | 44ea9c8 | 2009-01-06 14:41:35 -0800 | [diff] [blame] | 634 | of_node_put(np); |
| 635 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | if (of_dev == NULL) { |
| 637 | printk(KERN_ERR "Can't register temperatures device !\n"); |
| 638 | return -ENODEV; |
| 639 | } |
Nicolas Palix | 44ea9c8 | 2009-01-06 14:41:35 -0800 | [diff] [blame] | 640 | |
Jean Delvare | 33a470f | 2010-01-31 04:00:30 +0000 | [diff] [blame] | 641 | #ifndef CONFIG_I2C_POWERMAC |
| 642 | request_module("i2c-powermac"); |
| 643 | #endif |
| 644 | |
| 645 | return i2c_add_driver(&thermostat_driver); |
| 646 | } |
| 647 | |
| 648 | static void thermostat_create_files(void) |
| 649 | { |
| 650 | int err; |
| 651 | |
Stephen Rothwell | 10804f0 | 2008-01-03 15:17:12 +1100 | [diff] [blame] | 652 | err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
| 653 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature); |
| 654 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit); |
| 655 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_limit); |
| 656 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_location); |
| 657 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_location); |
| 658 | err |= device_create_file(&of_dev->dev, &dev_attr_limit_adjust); |
| 659 | err |= device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed); |
| 660 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | if(therm_type == ADT7460) |
Stephen Rothwell | 10804f0 | 2008-01-03 15:17:12 +1100 | [diff] [blame] | 662 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed); |
| 663 | if (err) |
| 664 | printk(KERN_WARNING |
| 665 | "Failed to create tempertaure attribute file(s).\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | } |
| 667 | |
Jean Delvare | 33a470f | 2010-01-31 04:00:30 +0000 | [diff] [blame] | 668 | static void thermostat_remove_files(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | { |
| 670 | if (of_dev) { |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 671 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
| 672 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature); |
| 673 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit); |
| 674 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit); |
| 675 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_location); |
| 676 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_location); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | device_remove_file(&of_dev->dev, &dev_attr_limit_adjust); |
| 678 | device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed); |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 679 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
| 681 | if(therm_type == ADT7460) |
| 682 | device_remove_file(&of_dev->dev, |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 683 | &dev_attr_sensor2_fan_speed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | } |
Jean Delvare | 33a470f | 2010-01-31 04:00:30 +0000 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | static void __exit |
| 689 | thermostat_exit(void) |
| 690 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | i2c_del_driver(&thermostat_driver); |
Jean Delvare | 33a470f | 2010-01-31 04:00:30 +0000 | [diff] [blame] | 692 | of_device_unregister(of_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | } |
| 694 | |
| 695 | module_init(thermostat_init); |
| 696 | module_exit(thermostat_exit); |