Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | adm1021.c - Part of lm_sensors, Linux kernel modules for hardware |
| 3 | monitoring |
| 4 | Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and |
| 5 | Philip Edelbrock <phil@netroedge.com> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/module.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/jiffies.h> |
| 26 | #include <linux/i2c.h> |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 27 | #include <linux/hwmon.h> |
| 28 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | |
| 31 | /* Addresses to scan */ |
| 32 | static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, |
| 33 | 0x29, 0x2a, 0x2b, |
| 34 | 0x4c, 0x4d, 0x4e, |
| 35 | I2C_CLIENT_END }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | /* Insmod parameters */ |
Jean Delvare | f4b5026 | 2005-07-31 21:49:03 +0200 | [diff] [blame] | 38 | I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | /* adm1021 constants specified below */ |
| 41 | |
| 42 | /* The adm1021 registers */ |
| 43 | /* Read-only */ |
| 44 | #define ADM1021_REG_TEMP 0x00 |
| 45 | #define ADM1021_REG_REMOTE_TEMP 0x01 |
| 46 | #define ADM1021_REG_STATUS 0x02 |
| 47 | #define ADM1021_REG_MAN_ID 0x0FE /* 0x41 = AMD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi*/ |
| 48 | #define ADM1021_REG_DEV_ID 0x0FF /* ADM1021 = 0x0X, ADM1023 = 0x3X */ |
| 49 | #define ADM1021_REG_DIE_CODE 0x0FF /* MAX1617A */ |
| 50 | /* These use different addresses for reading/writing */ |
| 51 | #define ADM1021_REG_CONFIG_R 0x03 |
| 52 | #define ADM1021_REG_CONFIG_W 0x09 |
| 53 | #define ADM1021_REG_CONV_RATE_R 0x04 |
| 54 | #define ADM1021_REG_CONV_RATE_W 0x0A |
| 55 | /* These are for the ADM1023's additional precision on the remote temp sensor */ |
| 56 | #define ADM1021_REG_REM_TEMP_PREC 0x010 |
| 57 | #define ADM1021_REG_REM_OFFSET 0x011 |
| 58 | #define ADM1021_REG_REM_OFFSET_PREC 0x012 |
| 59 | #define ADM1021_REG_REM_TOS_PREC 0x013 |
| 60 | #define ADM1021_REG_REM_THYST_PREC 0x014 |
| 61 | /* limits */ |
| 62 | #define ADM1021_REG_TOS_R 0x05 |
| 63 | #define ADM1021_REG_TOS_W 0x0B |
| 64 | #define ADM1021_REG_REMOTE_TOS_R 0x07 |
| 65 | #define ADM1021_REG_REMOTE_TOS_W 0x0D |
| 66 | #define ADM1021_REG_THYST_R 0x06 |
| 67 | #define ADM1021_REG_THYST_W 0x0C |
| 68 | #define ADM1021_REG_REMOTE_THYST_R 0x08 |
| 69 | #define ADM1021_REG_REMOTE_THYST_W 0x0E |
| 70 | /* write-only */ |
| 71 | #define ADM1021_REG_ONESHOT 0x0F |
| 72 | |
| 73 | |
| 74 | /* Conversions. Rounding and limit checking is only done on the TO_REG |
| 75 | variants. Note that you should be a bit careful with which arguments |
| 76 | these macros are called: arguments may be evaluated more than once. |
| 77 | Fixing this is just not worth it. */ |
| 78 | /* Conversions note: 1021 uses normal integer signed-byte format*/ |
| 79 | #define TEMP_FROM_REG(val) (val > 127 ? (val-256)*1000 : val*1000) |
| 80 | #define TEMP_TO_REG(val) (SENSORS_LIMIT((val < 0 ? (val/1000)+256 : val/1000),0,255)) |
| 81 | |
| 82 | /* Initial values */ |
| 83 | |
| 84 | /* Note: Even though I left the low and high limits named os and hyst, |
| 85 | they don't quite work like a thermostat the way the LM75 does. I.e., |
| 86 | a lower temp than THYST actually triggers an alarm instead of |
| 87 | clearing it. Weird, ey? --Phil */ |
| 88 | |
| 89 | /* Each client has this additional data */ |
| 90 | struct adm1021_data { |
| 91 | struct i2c_client client; |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 92 | struct class_device *class_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | enum chips type; |
| 94 | |
| 95 | struct semaphore update_lock; |
| 96 | char valid; /* !=0 if following fields are valid */ |
| 97 | unsigned long last_updated; /* In jiffies */ |
| 98 | |
| 99 | u8 temp_max; /* Register values */ |
| 100 | u8 temp_hyst; |
| 101 | u8 temp_input; |
| 102 | u8 remote_temp_max; |
| 103 | u8 remote_temp_hyst; |
| 104 | u8 remote_temp_input; |
| 105 | u8 alarms; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | /* Special values for ADM1023 only */ |
| 107 | u8 remote_temp_prec; |
| 108 | u8 remote_temp_os_prec; |
| 109 | u8 remote_temp_hyst_prec; |
| 110 | u8 remote_temp_offset; |
| 111 | u8 remote_temp_offset_prec; |
| 112 | }; |
| 113 | |
| 114 | static int adm1021_attach_adapter(struct i2c_adapter *adapter); |
| 115 | static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind); |
| 116 | static void adm1021_init_client(struct i2c_client *client); |
| 117 | static int adm1021_detach_client(struct i2c_client *client); |
| 118 | static int adm1021_read_value(struct i2c_client *client, u8 reg); |
| 119 | static int adm1021_write_value(struct i2c_client *client, u8 reg, |
| 120 | u16 value); |
| 121 | static struct adm1021_data *adm1021_update_device(struct device *dev); |
| 122 | |
| 123 | /* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */ |
Jean Delvare | 0200296 | 2005-09-25 16:26:44 +0200 | [diff] [blame] | 124 | static int read_only; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | |
| 127 | /* This is the driver that will be inserted */ |
| 128 | static struct i2c_driver adm1021_driver = { |
Laurent Riffard | cdaf793 | 2005-11-26 20:37:41 +0100 | [diff] [blame] | 129 | .driver = { |
Laurent Riffard | cdaf793 | 2005-11-26 20:37:41 +0100 | [diff] [blame] | 130 | .name = "adm1021", |
| 131 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | .id = I2C_DRIVERID_ADM1021, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | .attach_adapter = adm1021_attach_adapter, |
| 134 | .detach_client = adm1021_detach_client, |
| 135 | }; |
| 136 | |
| 137 | #define show(value) \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 138 | static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | { \ |
| 140 | struct adm1021_data *data = adm1021_update_device(dev); \ |
| 141 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \ |
| 142 | } |
| 143 | show(temp_max); |
| 144 | show(temp_hyst); |
| 145 | show(temp_input); |
| 146 | show(remote_temp_max); |
| 147 | show(remote_temp_hyst); |
| 148 | show(remote_temp_input); |
| 149 | |
| 150 | #define show2(value) \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 151 | static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | { \ |
| 153 | struct adm1021_data *data = adm1021_update_device(dev); \ |
| 154 | return sprintf(buf, "%d\n", data->value); \ |
| 155 | } |
| 156 | show2(alarms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
| 158 | #define set(value, reg) \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 159 | static ssize_t set_##value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | { \ |
| 161 | struct i2c_client *client = to_i2c_client(dev); \ |
| 162 | struct adm1021_data *data = i2c_get_clientdata(client); \ |
| 163 | int temp = simple_strtoul(buf, NULL, 10); \ |
| 164 | \ |
| 165 | down(&data->update_lock); \ |
| 166 | data->value = TEMP_TO_REG(temp); \ |
| 167 | adm1021_write_value(client, reg, data->value); \ |
| 168 | up(&data->update_lock); \ |
| 169 | return count; \ |
| 170 | } |
| 171 | set(temp_max, ADM1021_REG_TOS_W); |
| 172 | set(temp_hyst, ADM1021_REG_THYST_W); |
| 173 | set(remote_temp_max, ADM1021_REG_REMOTE_TOS_W); |
| 174 | set(remote_temp_hyst, ADM1021_REG_REMOTE_THYST_W); |
| 175 | |
| 176 | static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max); |
| 177 | static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_hyst, set_temp_hyst); |
| 178 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL); |
| 179 | static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_remote_temp_max, set_remote_temp_max); |
| 180 | static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_remote_temp_hyst, set_remote_temp_hyst); |
| 181 | static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote_temp_input, NULL); |
| 182 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
| 184 | |
| 185 | static int adm1021_attach_adapter(struct i2c_adapter *adapter) |
| 186 | { |
| 187 | if (!(adapter->class & I2C_CLASS_HWMON)) |
| 188 | return 0; |
Jean Delvare | 2ed2dc3 | 2005-07-31 21:42:02 +0200 | [diff] [blame] | 189 | return i2c_probe(adapter, &addr_data, adm1021_detect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind) |
| 193 | { |
| 194 | int i; |
| 195 | struct i2c_client *new_client; |
| 196 | struct adm1021_data *data; |
| 197 | int err = 0; |
| 198 | const char *type_name = ""; |
| 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| 201 | goto error0; |
| 202 | |
| 203 | /* OK. For now, we presume we have a valid client. We now create the |
| 204 | client structure, even though we cannot fill it completely yet. |
| 205 | But it allows us to access adm1021_{read,write}_value. */ |
| 206 | |
Deepak Saxena | ba9c2e8 | 2005-10-17 23:08:32 +0200 | [diff] [blame] | 207 | if (!(data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | err = -ENOMEM; |
| 209 | goto error0; |
| 210 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | new_client = &data->client; |
| 213 | i2c_set_clientdata(new_client, data); |
| 214 | new_client->addr = address; |
| 215 | new_client->adapter = adapter; |
| 216 | new_client->driver = &adm1021_driver; |
| 217 | new_client->flags = 0; |
| 218 | |
| 219 | /* Now, we do the remaining detection. */ |
| 220 | if (kind < 0) { |
| 221 | if ((adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0x03) != 0x00 |
| 222 | || (adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x3F) != 0x00 |
| 223 | || (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) & 0xF8) != 0x00) { |
| 224 | err = -ENODEV; |
| 225 | goto error1; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /* Determine the chip type. */ |
| 230 | if (kind <= 0) { |
| 231 | i = adm1021_read_value(new_client, ADM1021_REG_MAN_ID); |
| 232 | if (i == 0x41) |
| 233 | if ((adm1021_read_value(new_client, ADM1021_REG_DEV_ID) & 0x0F0) == 0x030) |
| 234 | kind = adm1023; |
| 235 | else |
| 236 | kind = adm1021; |
| 237 | else if (i == 0x49) |
| 238 | kind = thmc10; |
| 239 | else if (i == 0x23) |
| 240 | kind = gl523sm; |
| 241 | else if ((i == 0x4d) && |
| 242 | (adm1021_read_value(new_client, ADM1021_REG_DEV_ID) == 0x01)) |
| 243 | kind = max1617a; |
| 244 | else if (i == 0x54) |
| 245 | kind = mc1066; |
| 246 | /* LM84 Mfr ID in a different place, and it has more unused bits */ |
| 247 | else if (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) == 0x00 |
| 248 | && (kind == 0 /* skip extra detection */ |
| 249 | || ((adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x7F) == 0x00 |
| 250 | && (adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0xAB) == 0x00))) |
| 251 | kind = lm84; |
| 252 | else |
| 253 | kind = max1617; |
| 254 | } |
| 255 | |
| 256 | if (kind == max1617) { |
| 257 | type_name = "max1617"; |
| 258 | } else if (kind == max1617a) { |
| 259 | type_name = "max1617a"; |
| 260 | } else if (kind == adm1021) { |
| 261 | type_name = "adm1021"; |
| 262 | } else if (kind == adm1023) { |
| 263 | type_name = "adm1023"; |
| 264 | } else if (kind == thmc10) { |
| 265 | type_name = "thmc10"; |
| 266 | } else if (kind == lm84) { |
| 267 | type_name = "lm84"; |
| 268 | } else if (kind == gl523sm) { |
| 269 | type_name = "gl523sm"; |
| 270 | } else if (kind == mc1066) { |
| 271 | type_name = "mc1066"; |
| 272 | } |
| 273 | |
| 274 | /* Fill in the remaining client fields and put it into the global list */ |
| 275 | strlcpy(new_client->name, type_name, I2C_NAME_SIZE); |
| 276 | data->type = kind; |
| 277 | data->valid = 0; |
| 278 | init_MUTEX(&data->update_lock); |
| 279 | |
| 280 | /* Tell the I2C layer a new client has arrived */ |
| 281 | if ((err = i2c_attach_client(new_client))) |
| 282 | goto error1; |
| 283 | |
| 284 | /* Initialize the ADM1021 chip */ |
| 285 | if (kind != lm84) |
| 286 | adm1021_init_client(new_client); |
| 287 | |
| 288 | /* Register sysfs hooks */ |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 289 | data->class_dev = hwmon_device_register(&new_client->dev); |
| 290 | if (IS_ERR(data->class_dev)) { |
| 291 | err = PTR_ERR(data->class_dev); |
| 292 | goto error2; |
| 293 | } |
| 294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | device_create_file(&new_client->dev, &dev_attr_temp1_max); |
| 296 | device_create_file(&new_client->dev, &dev_attr_temp1_min); |
| 297 | device_create_file(&new_client->dev, &dev_attr_temp1_input); |
| 298 | device_create_file(&new_client->dev, &dev_attr_temp2_max); |
| 299 | device_create_file(&new_client->dev, &dev_attr_temp2_min); |
| 300 | device_create_file(&new_client->dev, &dev_attr_temp2_input); |
| 301 | device_create_file(&new_client->dev, &dev_attr_alarms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | return 0; |
| 304 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 305 | error2: |
| 306 | i2c_detach_client(new_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | error1: |
| 308 | kfree(data); |
| 309 | error0: |
| 310 | return err; |
| 311 | } |
| 312 | |
| 313 | static void adm1021_init_client(struct i2c_client *client) |
| 314 | { |
| 315 | /* Enable ADC and disable suspend mode */ |
| 316 | adm1021_write_value(client, ADM1021_REG_CONFIG_W, |
| 317 | adm1021_read_value(client, ADM1021_REG_CONFIG_R) & 0xBF); |
| 318 | /* Set Conversion rate to 1/sec (this can be tinkered with) */ |
| 319 | adm1021_write_value(client, ADM1021_REG_CONV_RATE_W, 0x04); |
| 320 | } |
| 321 | |
| 322 | static int adm1021_detach_client(struct i2c_client *client) |
| 323 | { |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 324 | struct adm1021_data *data = i2c_get_clientdata(client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | int err; |
| 326 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 327 | hwmon_device_unregister(data->class_dev); |
| 328 | |
Jean Delvare | 7bef559 | 2005-07-27 22:14:49 +0200 | [diff] [blame] | 329 | if ((err = i2c_detach_client(client))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 332 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | /* All registers are byte-sized */ |
| 337 | static int adm1021_read_value(struct i2c_client *client, u8 reg) |
| 338 | { |
| 339 | return i2c_smbus_read_byte_data(client, reg); |
| 340 | } |
| 341 | |
| 342 | static int adm1021_write_value(struct i2c_client *client, u8 reg, u16 value) |
| 343 | { |
| 344 | if (!read_only) |
| 345 | return i2c_smbus_write_byte_data(client, reg, value); |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static struct adm1021_data *adm1021_update_device(struct device *dev) |
| 350 | { |
| 351 | struct i2c_client *client = to_i2c_client(dev); |
| 352 | struct adm1021_data *data = i2c_get_clientdata(client); |
| 353 | |
| 354 | down(&data->update_lock); |
| 355 | |
| 356 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| 357 | || !data->valid) { |
| 358 | dev_dbg(&client->dev, "Starting adm1021 update\n"); |
| 359 | |
| 360 | data->temp_input = adm1021_read_value(client, ADM1021_REG_TEMP); |
| 361 | data->temp_max = adm1021_read_value(client, ADM1021_REG_TOS_R); |
| 362 | data->temp_hyst = adm1021_read_value(client, ADM1021_REG_THYST_R); |
| 363 | data->remote_temp_input = adm1021_read_value(client, ADM1021_REG_REMOTE_TEMP); |
| 364 | data->remote_temp_max = adm1021_read_value(client, ADM1021_REG_REMOTE_TOS_R); |
| 365 | data->remote_temp_hyst = adm1021_read_value(client, ADM1021_REG_REMOTE_THYST_R); |
| 366 | data->alarms = adm1021_read_value(client, ADM1021_REG_STATUS) & 0x7c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | if (data->type == adm1023) { |
| 368 | data->remote_temp_prec = adm1021_read_value(client, ADM1021_REG_REM_TEMP_PREC); |
| 369 | data->remote_temp_os_prec = adm1021_read_value(client, ADM1021_REG_REM_TOS_PREC); |
| 370 | data->remote_temp_hyst_prec = adm1021_read_value(client, ADM1021_REG_REM_THYST_PREC); |
| 371 | data->remote_temp_offset = adm1021_read_value(client, ADM1021_REG_REM_OFFSET); |
| 372 | data->remote_temp_offset_prec = adm1021_read_value(client, ADM1021_REG_REM_OFFSET_PREC); |
| 373 | } |
| 374 | data->last_updated = jiffies; |
| 375 | data->valid = 1; |
| 376 | } |
| 377 | |
| 378 | up(&data->update_lock); |
| 379 | |
| 380 | return data; |
| 381 | } |
| 382 | |
| 383 | static int __init sensors_adm1021_init(void) |
| 384 | { |
| 385 | return i2c_add_driver(&adm1021_driver); |
| 386 | } |
| 387 | |
| 388 | static void __exit sensors_adm1021_exit(void) |
| 389 | { |
| 390 | i2c_del_driver(&adm1021_driver); |
| 391 | } |
| 392 | |
| 393 | MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and " |
| 394 | "Philip Edelbrock <phil@netroedge.com>"); |
| 395 | MODULE_DESCRIPTION("adm1021 driver"); |
| 396 | MODULE_LICENSE("GPL"); |
| 397 | |
| 398 | module_param(read_only, bool, 0); |
| 399 | MODULE_PARM_DESC(read_only, "Don't set any values, read only mode"); |
| 400 | |
| 401 | module_init(sensors_adm1021_init) |
| 402 | module_exit(sensors_adm1021_exit) |