Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 1 | /* tmp421.c |
| 2 | * |
| 3 | * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de> |
| 4 | * Preliminary support by: |
| 5 | * Melvin Rook, Raymond Ng |
| 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. |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 16 | */ |
| 17 | |
| 18 | /* |
| 19 | * Driver for the Texas Instruments TMP421 SMBus temperature sensor IC. |
Guenter Roeck | 05c77ab | 2014-04-12 16:12:06 -0700 | [diff] [blame] | 20 | * Supported models: TMP421, TMP422, TMP423, TMP441, TMP442 |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/jiffies.h> |
| 27 | #include <linux/i2c.h> |
| 28 | #include <linux/hwmon.h> |
| 29 | #include <linux/hwmon-sysfs.h> |
| 30 | #include <linux/err.h> |
| 31 | #include <linux/mutex.h> |
Javier Martinez Canillas | a125302 | 2017-02-24 10:13:12 -0300 | [diff] [blame] | 32 | #include <linux/of_device.h> |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 33 | #include <linux/sysfs.h> |
| 34 | |
| 35 | /* Addresses to scan */ |
Jean Delvare | 918ee91 | 2010-10-28 20:31:50 +0200 | [diff] [blame] | 36 | static const unsigned short normal_i2c[] = { 0x2a, 0x4c, 0x4d, 0x4e, 0x4f, |
| 37 | I2C_CLIENT_END }; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 38 | |
Guenter Roeck | 05c77ab | 2014-04-12 16:12:06 -0700 | [diff] [blame] | 39 | enum chips { tmp421, tmp422, tmp423, tmp441, tmp442 }; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 40 | |
| 41 | /* The TMP421 registers */ |
Guenter Roeck | a63ee9d | 2014-04-22 16:13:17 -0700 | [diff] [blame] | 42 | #define TMP421_STATUS_REG 0x08 |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 43 | #define TMP421_CONFIG_REG_1 0x09 |
| 44 | #define TMP421_CONVERSION_RATE_REG 0x0B |
| 45 | #define TMP421_MANUFACTURER_ID_REG 0xFE |
| 46 | #define TMP421_DEVICE_ID_REG 0xFF |
| 47 | |
| 48 | static const u8 TMP421_TEMP_MSB[4] = { 0x00, 0x01, 0x02, 0x03 }; |
| 49 | static const u8 TMP421_TEMP_LSB[4] = { 0x10, 0x11, 0x12, 0x13 }; |
| 50 | |
| 51 | /* Flags */ |
| 52 | #define TMP421_CONFIG_SHUTDOWN 0x40 |
| 53 | #define TMP421_CONFIG_RANGE 0x04 |
| 54 | |
| 55 | /* Manufacturer / Device ID's */ |
| 56 | #define TMP421_MANUFACTURER_ID 0x55 |
| 57 | #define TMP421_DEVICE_ID 0x21 |
| 58 | #define TMP422_DEVICE_ID 0x22 |
| 59 | #define TMP423_DEVICE_ID 0x23 |
Guenter Roeck | 05c77ab | 2014-04-12 16:12:06 -0700 | [diff] [blame] | 60 | #define TMP441_DEVICE_ID 0x41 |
| 61 | #define TMP442_DEVICE_ID 0x42 |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 62 | |
| 63 | static const struct i2c_device_id tmp421_id[] = { |
Jean Delvare | 8d59582 | 2010-03-05 22:17:25 +0100 | [diff] [blame] | 64 | { "tmp421", 2 }, |
| 65 | { "tmp422", 3 }, |
| 66 | { "tmp423", 4 }, |
Guenter Roeck | 05c77ab | 2014-04-12 16:12:06 -0700 | [diff] [blame] | 67 | { "tmp441", 2 }, |
| 68 | { "tmp442", 3 }, |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 69 | { } |
| 70 | }; |
| 71 | MODULE_DEVICE_TABLE(i2c, tmp421_id); |
| 72 | |
Javier Martinez Canillas | a125302 | 2017-02-24 10:13:12 -0300 | [diff] [blame] | 73 | static const struct of_device_id tmp421_of_match[] = { |
| 74 | { |
| 75 | .compatible = "ti,tmp421", |
| 76 | .data = (void *)2 |
| 77 | }, |
| 78 | { |
| 79 | .compatible = "ti,tmp422", |
| 80 | .data = (void *)3 |
| 81 | }, |
| 82 | { |
| 83 | .compatible = "ti,tmp423", |
| 84 | .data = (void *)4 |
| 85 | }, |
| 86 | { |
| 87 | .compatible = "ti,tmp441", |
| 88 | .data = (void *)2 |
| 89 | }, |
| 90 | { |
| 91 | .compatible = "ti,tmp422", |
| 92 | .data = (void *)3 |
| 93 | }, |
| 94 | { }, |
| 95 | }; |
| 96 | MODULE_DEVICE_TABLE(of, tmp421_of_match); |
| 97 | |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 98 | struct tmp421_data { |
Guenter Roeck | 276dac8 | 2014-04-05 21:22:46 -0700 | [diff] [blame] | 99 | struct i2c_client *client; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 100 | struct mutex update_lock; |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 101 | u32 temp_config[5]; |
| 102 | struct hwmon_channel_info temp_info; |
| 103 | const struct hwmon_channel_info *info[2]; |
| 104 | struct hwmon_chip_info chip; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 105 | char valid; |
| 106 | unsigned long last_updated; |
Javier Martinez Canillas | a125302 | 2017-02-24 10:13:12 -0300 | [diff] [blame] | 107 | unsigned long channels; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 108 | u8 config; |
| 109 | s16 temp[4]; |
| 110 | }; |
| 111 | |
| 112 | static int temp_from_s16(s16 reg) |
| 113 | { |
Jean Delvare | a44908d | 2010-03-05 22:17:25 +0100 | [diff] [blame] | 114 | /* Mask out status bits */ |
| 115 | int temp = reg & ~0xf; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 116 | |
| 117 | return (temp * 1000 + 128) / 256; |
| 118 | } |
| 119 | |
| 120 | static int temp_from_u16(u16 reg) |
| 121 | { |
Jean Delvare | a44908d | 2010-03-05 22:17:25 +0100 | [diff] [blame] | 122 | /* Mask out status bits */ |
| 123 | int temp = reg & ~0xf; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 124 | |
| 125 | /* Add offset for extended temperature range. */ |
| 126 | temp -= 64 * 256; |
| 127 | |
| 128 | return (temp * 1000 + 128) / 256; |
| 129 | } |
| 130 | |
| 131 | static struct tmp421_data *tmp421_update_device(struct device *dev) |
| 132 | { |
Guenter Roeck | 276dac8 | 2014-04-05 21:22:46 -0700 | [diff] [blame] | 133 | struct tmp421_data *data = dev_get_drvdata(dev); |
| 134 | struct i2c_client *client = data->client; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 135 | int i; |
| 136 | |
| 137 | mutex_lock(&data->update_lock); |
| 138 | |
| 139 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
| 140 | data->config = i2c_smbus_read_byte_data(client, |
| 141 | TMP421_CONFIG_REG_1); |
| 142 | |
Jean Delvare | 8d59582 | 2010-03-05 22:17:25 +0100 | [diff] [blame] | 143 | for (i = 0; i < data->channels; i++) { |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 144 | data->temp[i] = i2c_smbus_read_byte_data(client, |
| 145 | TMP421_TEMP_MSB[i]) << 8; |
| 146 | data->temp[i] |= i2c_smbus_read_byte_data(client, |
| 147 | TMP421_TEMP_LSB[i]); |
| 148 | } |
| 149 | data->last_updated = jiffies; |
| 150 | data->valid = 1; |
| 151 | } |
| 152 | |
| 153 | mutex_unlock(&data->update_lock); |
| 154 | |
| 155 | return data; |
| 156 | } |
| 157 | |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 158 | static int tmp421_read(struct device *dev, enum hwmon_sensor_types type, |
| 159 | u32 attr, int channel, long *val) |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 160 | { |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 161 | struct tmp421_data *tmp421 = tmp421_update_device(dev); |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 162 | |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 163 | switch (attr) { |
| 164 | case hwmon_temp_input: |
| 165 | if (tmp421->config & TMP421_CONFIG_RANGE) |
| 166 | *val = temp_from_u16(tmp421->temp[channel]); |
| 167 | else |
| 168 | *val = temp_from_s16(tmp421->temp[channel]); |
| 169 | return 0; |
| 170 | case hwmon_temp_fault: |
| 171 | /* |
| 172 | * The OPEN bit signals a fault. This is bit 0 of the temperature |
| 173 | * register (low byte). |
| 174 | */ |
| 175 | *val = tmp421->temp[channel] & 0x01; |
| 176 | return 0; |
| 177 | default: |
| 178 | return -EOPNOTSUPP; |
| 179 | } |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 180 | |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 181 | } |
| 182 | |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 183 | static umode_t tmp421_is_visible(const void *data, enum hwmon_sensor_types type, |
| 184 | u32 attr, int channel) |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 185 | { |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 186 | switch (attr) { |
| 187 | case hwmon_temp_fault: |
| 188 | if (channel == 0) |
| 189 | return 0; |
| 190 | return S_IRUGO; |
| 191 | case hwmon_temp_input: |
| 192 | return S_IRUGO; |
| 193 | default: |
| 194 | return 0; |
| 195 | } |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 196 | } |
| 197 | |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 198 | static int tmp421_init_client(struct i2c_client *client) |
| 199 | { |
| 200 | int config, config_orig; |
| 201 | |
| 202 | /* Set the conversion rate to 2 Hz */ |
| 203 | i2c_smbus_write_byte_data(client, TMP421_CONVERSION_RATE_REG, 0x05); |
| 204 | |
| 205 | /* Start conversions (disable shutdown if necessary) */ |
| 206 | config = i2c_smbus_read_byte_data(client, TMP421_CONFIG_REG_1); |
| 207 | if (config < 0) { |
Guenter Roeck | b55f375 | 2013-01-10 10:01:24 -0800 | [diff] [blame] | 208 | dev_err(&client->dev, |
| 209 | "Could not read configuration register (%d)\n", config); |
Sachin Kamat | 010a166 | 2013-09-11 09:49:52 +0530 | [diff] [blame] | 210 | return config; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | config_orig = config; |
| 214 | config &= ~TMP421_CONFIG_SHUTDOWN; |
| 215 | |
| 216 | if (config != config_orig) { |
| 217 | dev_info(&client->dev, "Enable monitoring chip\n"); |
| 218 | i2c_smbus_write_byte_data(client, TMP421_CONFIG_REG_1, config); |
| 219 | } |
| 220 | |
| 221 | return 0; |
| 222 | } |
| 223 | |
Jean Delvare | 310ec79 | 2009-12-14 21:17:23 +0100 | [diff] [blame] | 224 | static int tmp421_detect(struct i2c_client *client, |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 225 | struct i2c_board_info *info) |
| 226 | { |
Jean Delvare | dbe73c8 | 2009-12-09 20:35:54 +0100 | [diff] [blame] | 227 | enum chips kind; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 228 | struct i2c_adapter *adapter = client->adapter; |
Guenter Roeck | 05c77ab | 2014-04-12 16:12:06 -0700 | [diff] [blame] | 229 | const char * const names[] = { "TMP421", "TMP422", "TMP423", |
| 230 | "TMP441", "TMP442" }; |
Guenter Roeck | a63ee9d | 2014-04-22 16:13:17 -0700 | [diff] [blame] | 231 | int addr = client->addr; |
Jean Delvare | dbe73c8 | 2009-12-09 20:35:54 +0100 | [diff] [blame] | 232 | u8 reg; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 233 | |
| 234 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| 235 | return -ENODEV; |
| 236 | |
Jean Delvare | dbe73c8 | 2009-12-09 20:35:54 +0100 | [diff] [blame] | 237 | reg = i2c_smbus_read_byte_data(client, TMP421_MANUFACTURER_ID_REG); |
| 238 | if (reg != TMP421_MANUFACTURER_ID) |
| 239 | return -ENODEV; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 240 | |
Guenter Roeck | a63ee9d | 2014-04-22 16:13:17 -0700 | [diff] [blame] | 241 | reg = i2c_smbus_read_byte_data(client, TMP421_CONVERSION_RATE_REG); |
| 242 | if (reg & 0xf8) |
| 243 | return -ENODEV; |
| 244 | |
| 245 | reg = i2c_smbus_read_byte_data(client, TMP421_STATUS_REG); |
| 246 | if (reg & 0x7f) |
| 247 | return -ENODEV; |
| 248 | |
Jean Delvare | dbe73c8 | 2009-12-09 20:35:54 +0100 | [diff] [blame] | 249 | reg = i2c_smbus_read_byte_data(client, TMP421_DEVICE_ID_REG); |
| 250 | switch (reg) { |
| 251 | case TMP421_DEVICE_ID: |
| 252 | kind = tmp421; |
| 253 | break; |
| 254 | case TMP422_DEVICE_ID: |
Guenter Roeck | a63ee9d | 2014-04-22 16:13:17 -0700 | [diff] [blame] | 255 | if (addr == 0x2a) |
| 256 | return -ENODEV; |
Jean Delvare | dbe73c8 | 2009-12-09 20:35:54 +0100 | [diff] [blame] | 257 | kind = tmp422; |
| 258 | break; |
| 259 | case TMP423_DEVICE_ID: |
Guenter Roeck | a63ee9d | 2014-04-22 16:13:17 -0700 | [diff] [blame] | 260 | if (addr != 0x4c && addr != 0x4d) |
| 261 | return -ENODEV; |
Jean Delvare | dbe73c8 | 2009-12-09 20:35:54 +0100 | [diff] [blame] | 262 | kind = tmp423; |
| 263 | break; |
Guenter Roeck | 05c77ab | 2014-04-12 16:12:06 -0700 | [diff] [blame] | 264 | case TMP441_DEVICE_ID: |
| 265 | kind = tmp441; |
| 266 | break; |
| 267 | case TMP442_DEVICE_ID: |
| 268 | if (addr != 0x4c && addr != 0x4d) |
| 269 | return -ENODEV; |
| 270 | kind = tmp442; |
| 271 | break; |
Jean Delvare | dbe73c8 | 2009-12-09 20:35:54 +0100 | [diff] [blame] | 272 | default: |
| 273 | return -ENODEV; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 274 | } |
Jean Delvare | dbe73c8 | 2009-12-09 20:35:54 +0100 | [diff] [blame] | 275 | |
Jean Delvare | dc71afe | 2010-03-05 22:17:26 +0100 | [diff] [blame] | 276 | strlcpy(info->type, tmp421_id[kind].name, I2C_NAME_SIZE); |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 277 | dev_info(&adapter->dev, "Detected TI %s chip at 0x%02x\n", |
Jean Delvare | dc71afe | 2010-03-05 22:17:26 +0100 | [diff] [blame] | 278 | names[kind], client->addr); |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 279 | |
| 280 | return 0; |
| 281 | } |
| 282 | |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 283 | static const struct hwmon_ops tmp421_ops = { |
| 284 | .is_visible = tmp421_is_visible, |
| 285 | .read = tmp421_read, |
| 286 | }; |
| 287 | |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 288 | static int tmp421_probe(struct i2c_client *client, |
| 289 | const struct i2c_device_id *id) |
| 290 | { |
Guenter Roeck | 276dac8 | 2014-04-05 21:22:46 -0700 | [diff] [blame] | 291 | struct device *dev = &client->dev; |
| 292 | struct device *hwmon_dev; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 293 | struct tmp421_data *data; |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 294 | int i, err; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 295 | |
Guenter Roeck | 276dac8 | 2014-04-05 21:22:46 -0700 | [diff] [blame] | 296 | data = devm_kzalloc(dev, sizeof(struct tmp421_data), GFP_KERNEL); |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 297 | if (!data) |
| 298 | return -ENOMEM; |
| 299 | |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 300 | mutex_init(&data->update_lock); |
Javier Martinez Canillas | a125302 | 2017-02-24 10:13:12 -0300 | [diff] [blame] | 301 | if (client->dev.of_node) |
| 302 | data->channels = (unsigned long) |
| 303 | of_device_get_match_data(&client->dev); |
| 304 | else |
| 305 | data->channels = id->driver_data; |
Guenter Roeck | 276dac8 | 2014-04-05 21:22:46 -0700 | [diff] [blame] | 306 | data->client = client; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 307 | |
| 308 | err = tmp421_init_client(client); |
| 309 | if (err) |
Guenter Roeck | f625e0f | 2012-06-02 11:35:53 -0700 | [diff] [blame] | 310 | return err; |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 311 | |
Guenter Roeck | bb43cc4 | 2016-06-25 10:41:18 -0700 | [diff] [blame] | 312 | for (i = 0; i < data->channels; i++) |
| 313 | data->temp_config[i] = HWMON_T_INPUT | HWMON_T_FAULT; |
| 314 | |
| 315 | data->chip.ops = &tmp421_ops; |
| 316 | data->chip.info = data->info; |
| 317 | |
| 318 | data->info[0] = &data->temp_info; |
| 319 | |
| 320 | data->temp_info.type = hwmon_temp; |
| 321 | data->temp_info.config = data->temp_config; |
| 322 | |
| 323 | hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
| 324 | data, |
| 325 | &data->chip, |
| 326 | NULL); |
Guenter Roeck | 276dac8 | 2014-04-05 21:22:46 -0700 | [diff] [blame] | 327 | return PTR_ERR_OR_ZERO(hwmon_dev); |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | static struct i2c_driver tmp421_driver = { |
| 331 | .class = I2C_CLASS_HWMON, |
| 332 | .driver = { |
| 333 | .name = "tmp421", |
Javier Martinez Canillas | a125302 | 2017-02-24 10:13:12 -0300 | [diff] [blame] | 334 | .of_match_table = of_match_ptr(tmp421_of_match), |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 335 | }, |
| 336 | .probe = tmp421_probe, |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 337 | .id_table = tmp421_id, |
| 338 | .detect = tmp421_detect, |
Jean Delvare | c3813d6 | 2009-12-14 21:17:25 +0100 | [diff] [blame] | 339 | .address_list = normal_i2c, |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 340 | }; |
| 341 | |
Axel Lin | f0967ee | 2012-01-20 15:38:18 +0800 | [diff] [blame] | 342 | module_i2c_driver(tmp421_driver); |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 343 | |
| 344 | MODULE_AUTHOR("Andre Prendel <andre.prendel@gmx.de>"); |
Guenter Roeck | 05c77ab | 2014-04-12 16:12:06 -0700 | [diff] [blame] | 345 | MODULE_DESCRIPTION("Texas Instruments TMP421/422/423/441/442 temperature sensor driver"); |
Andre Prendel | 9410700 | 2009-09-15 17:18:11 +0200 | [diff] [blame] | 346 | MODULE_LICENSE("GPL"); |