Guenter Roeck | 5372d2d | 2012-10-12 23:01:58 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net> |
| 3 | * |
| 4 | * based on max1668.c |
| 5 | * Copyright (c) 2011 David George <david.george@ska.ac.za> |
| 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 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/jiffies.h> |
| 22 | #include <linux/i2c.h> |
| 23 | #include <linux/hwmon.h> |
| 24 | #include <linux/hwmon-sysfs.h> |
| 25 | #include <linux/err.h> |
| 26 | #include <linux/mutex.h> |
| 27 | #include <linux/of.h> |
| 28 | |
| 29 | #include <linux/platform_data/max6697.h> |
| 30 | |
| 31 | enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694, |
| 32 | max6697, max6698, max6699 }; |
| 33 | |
| 34 | /* Report local sensor as temp1 */ |
| 35 | |
| 36 | static const u8 MAX6697_REG_TEMP[] = { |
| 37 | 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 }; |
| 38 | static const u8 MAX6697_REG_TEMP_EXT[] = { |
| 39 | 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 }; |
| 40 | static const u8 MAX6697_REG_MAX[] = { |
| 41 | 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 }; |
| 42 | static const u8 MAX6697_REG_CRIT[] = { |
| 43 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 }; |
| 44 | |
| 45 | /* |
| 46 | * Map device tree / platform data register bit map to chip bit map. |
| 47 | * Applies to alert register and over-temperature register. |
| 48 | */ |
| 49 | #define MAX6697_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ |
| 50 | (((reg) & 0x01) << 6) | ((reg) & 0x80)) |
| 51 | |
| 52 | #define MAX6697_REG_STAT(n) (0x44 + (n)) |
| 53 | |
| 54 | #define MAX6697_REG_CONFIG 0x41 |
| 55 | #define MAX6581_CONF_EXTENDED (1 << 1) |
| 56 | #define MAX6693_CONF_BETA (1 << 2) |
| 57 | #define MAX6697_CONF_RESISTANCE (1 << 3) |
| 58 | #define MAX6697_CONF_TIMEOUT (1 << 5) |
| 59 | #define MAX6697_REG_ALERT_MASK 0x42 |
| 60 | #define MAX6697_REG_OVERT_MASK 0x43 |
| 61 | |
| 62 | #define MAX6581_REG_RESISTANCE 0x4a |
| 63 | #define MAX6581_REG_IDEALITY 0x4b |
| 64 | #define MAX6581_REG_IDEALITY_SELECT 0x4c |
| 65 | #define MAX6581_REG_OFFSET 0x4d |
| 66 | #define MAX6581_REG_OFFSET_SELECT 0x4e |
| 67 | |
| 68 | #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ |
| 69 | |
| 70 | struct max6697_chip_data { |
| 71 | int channels; |
| 72 | u32 have_ext; |
| 73 | u32 have_crit; |
| 74 | u32 have_fault; |
| 75 | u8 valid_conf; |
| 76 | const u8 *alarm_map; |
| 77 | }; |
| 78 | |
| 79 | struct max6697_data { |
| 80 | struct device *hwmon_dev; |
| 81 | |
| 82 | enum chips type; |
| 83 | const struct max6697_chip_data *chip; |
| 84 | |
| 85 | int update_interval; /* in milli-seconds */ |
| 86 | int temp_offset; /* in degrees C */ |
| 87 | |
| 88 | struct mutex update_lock; |
| 89 | unsigned long last_updated; /* In jiffies */ |
| 90 | bool valid; /* true if following fields are valid */ |
| 91 | |
| 92 | /* 1x local and up to 7x remote */ |
| 93 | u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ |
| 94 | #define MAX6697_TEMP_INPUT 0 |
| 95 | #define MAX6697_TEMP_EXT 1 |
| 96 | #define MAX6697_TEMP_MAX 2 |
| 97 | #define MAX6697_TEMP_CRIT 3 |
| 98 | u32 alarms; |
| 99 | }; |
| 100 | |
| 101 | /* Diode fault status bits on MAX6581 are right shifted by one bit */ |
| 102 | static const u8 max6581_alarm_map[] = { |
| 103 | 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, |
| 104 | 16, 17, 18, 19, 20, 21, 22, 23 }; |
| 105 | |
| 106 | static const struct max6697_chip_data max6697_chip_data[] = { |
| 107 | [max6581] = { |
| 108 | .channels = 8, |
| 109 | .have_crit = 0xff, |
| 110 | .have_ext = 0x7f, |
| 111 | .have_fault = 0xfe, |
| 112 | .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, |
| 113 | .alarm_map = max6581_alarm_map, |
| 114 | }, |
| 115 | [max6602] = { |
| 116 | .channels = 5, |
| 117 | .have_crit = 0x12, |
| 118 | .have_ext = 0x02, |
| 119 | .have_fault = 0x1e, |
| 120 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| 121 | }, |
| 122 | [max6622] = { |
| 123 | .channels = 5, |
| 124 | .have_crit = 0x12, |
| 125 | .have_ext = 0x02, |
| 126 | .have_fault = 0x1e, |
| 127 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| 128 | }, |
| 129 | [max6636] = { |
| 130 | .channels = 7, |
| 131 | .have_crit = 0x72, |
| 132 | .have_ext = 0x02, |
| 133 | .have_fault = 0x7e, |
| 134 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| 135 | }, |
| 136 | [max6689] = { |
| 137 | .channels = 7, |
| 138 | .have_crit = 0x72, |
| 139 | .have_ext = 0x02, |
| 140 | .have_fault = 0x7e, |
| 141 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| 142 | }, |
| 143 | [max6693] = { |
| 144 | .channels = 7, |
| 145 | .have_crit = 0x72, |
| 146 | .have_ext = 0x02, |
| 147 | .have_fault = 0x7e, |
| 148 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | |
| 149 | MAX6697_CONF_TIMEOUT, |
| 150 | }, |
| 151 | [max6694] = { |
| 152 | .channels = 5, |
| 153 | .have_crit = 0x12, |
| 154 | .have_ext = 0x02, |
| 155 | .have_fault = 0x1e, |
| 156 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | |
| 157 | MAX6697_CONF_TIMEOUT, |
| 158 | }, |
| 159 | [max6697] = { |
| 160 | .channels = 7, |
| 161 | .have_crit = 0x72, |
| 162 | .have_ext = 0x02, |
| 163 | .have_fault = 0x7e, |
| 164 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| 165 | }, |
| 166 | [max6698] = { |
| 167 | .channels = 7, |
| 168 | .have_crit = 0x72, |
| 169 | .have_ext = 0x02, |
| 170 | .have_fault = 0x0e, |
| 171 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| 172 | }, |
| 173 | [max6699] = { |
| 174 | .channels = 5, |
| 175 | .have_crit = 0x12, |
| 176 | .have_ext = 0x02, |
| 177 | .have_fault = 0x1e, |
| 178 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| 179 | }, |
| 180 | }; |
| 181 | |
| 182 | static struct max6697_data *max6697_update_device(struct device *dev) |
| 183 | { |
| 184 | struct i2c_client *client = to_i2c_client(dev); |
| 185 | struct max6697_data *data = i2c_get_clientdata(client); |
| 186 | struct max6697_data *ret = data; |
| 187 | int val; |
| 188 | int i; |
| 189 | u32 alarms; |
| 190 | |
| 191 | mutex_lock(&data->update_lock); |
| 192 | |
| 193 | if (data->valid && |
| 194 | !time_after(jiffies, data->last_updated |
| 195 | + msecs_to_jiffies(data->update_interval))) |
| 196 | goto abort; |
| 197 | |
| 198 | for (i = 0; i < data->chip->channels; i++) { |
| 199 | if (data->chip->have_ext & (1 << i)) { |
| 200 | val = i2c_smbus_read_byte_data(client, |
| 201 | MAX6697_REG_TEMP_EXT[i]); |
| 202 | if (unlikely(val < 0)) { |
| 203 | ret = ERR_PTR(val); |
| 204 | goto abort; |
| 205 | } |
| 206 | data->temp[i][MAX6697_TEMP_EXT] = val; |
| 207 | } |
| 208 | |
| 209 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]); |
| 210 | if (unlikely(val < 0)) { |
| 211 | ret = ERR_PTR(val); |
| 212 | goto abort; |
| 213 | } |
| 214 | data->temp[i][MAX6697_TEMP_INPUT] = val; |
| 215 | |
| 216 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]); |
| 217 | if (unlikely(val < 0)) { |
| 218 | ret = ERR_PTR(val); |
| 219 | goto abort; |
| 220 | } |
| 221 | data->temp[i][MAX6697_TEMP_MAX] = val; |
| 222 | |
| 223 | if (data->chip->have_crit & (1 << i)) { |
| 224 | val = i2c_smbus_read_byte_data(client, |
| 225 | MAX6697_REG_CRIT[i]); |
| 226 | if (unlikely(val < 0)) { |
| 227 | ret = ERR_PTR(val); |
| 228 | goto abort; |
| 229 | } |
| 230 | data->temp[i][MAX6697_TEMP_CRIT] = val; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | alarms = 0; |
| 235 | for (i = 0; i < 3; i++) { |
| 236 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i)); |
| 237 | if (unlikely(val < 0)) { |
| 238 | ret = ERR_PTR(val); |
| 239 | goto abort; |
| 240 | } |
| 241 | alarms = (alarms << 8) | val; |
| 242 | } |
| 243 | data->alarms = alarms; |
| 244 | data->last_updated = jiffies; |
| 245 | data->valid = true; |
| 246 | abort: |
| 247 | mutex_unlock(&data->update_lock); |
| 248 | |
| 249 | return ret; |
| 250 | } |
| 251 | |
| 252 | static ssize_t show_temp_input(struct device *dev, |
| 253 | struct device_attribute *devattr, char *buf) |
| 254 | { |
| 255 | int index = to_sensor_dev_attr(devattr)->index; |
| 256 | struct max6697_data *data = max6697_update_device(dev); |
| 257 | int temp; |
| 258 | |
| 259 | if (IS_ERR(data)) |
| 260 | return PTR_ERR(data); |
| 261 | |
| 262 | temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3; |
| 263 | temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5; |
| 264 | |
| 265 | return sprintf(buf, "%d\n", temp * 125); |
| 266 | } |
| 267 | |
| 268 | static ssize_t show_temp(struct device *dev, |
| 269 | struct device_attribute *devattr, char *buf) |
| 270 | { |
| 271 | int nr = to_sensor_dev_attr_2(devattr)->nr; |
| 272 | int index = to_sensor_dev_attr_2(devattr)->index; |
| 273 | struct max6697_data *data = max6697_update_device(dev); |
| 274 | int temp; |
| 275 | |
| 276 | if (IS_ERR(data)) |
| 277 | return PTR_ERR(data); |
| 278 | |
| 279 | temp = data->temp[nr][index]; |
| 280 | temp -= data->temp_offset; |
| 281 | |
| 282 | return sprintf(buf, "%d\n", temp * 1000); |
| 283 | } |
| 284 | |
| 285 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
| 286 | char *buf) |
| 287 | { |
| 288 | int index = to_sensor_dev_attr(attr)->index; |
| 289 | struct max6697_data *data = max6697_update_device(dev); |
| 290 | |
| 291 | if (IS_ERR(data)) |
| 292 | return PTR_ERR(data); |
| 293 | |
| 294 | if (data->chip->alarm_map) |
| 295 | index = data->chip->alarm_map[index]; |
| 296 | |
| 297 | return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); |
| 298 | } |
| 299 | |
| 300 | static ssize_t set_temp(struct device *dev, |
| 301 | struct device_attribute *devattr, |
| 302 | const char *buf, size_t count) |
| 303 | { |
| 304 | int nr = to_sensor_dev_attr_2(devattr)->nr; |
| 305 | int index = to_sensor_dev_attr_2(devattr)->index; |
| 306 | struct i2c_client *client = to_i2c_client(dev); |
| 307 | struct max6697_data *data = i2c_get_clientdata(client); |
| 308 | long temp; |
| 309 | int ret; |
| 310 | |
| 311 | ret = kstrtol(buf, 10, &temp); |
| 312 | if (ret < 0) |
| 313 | return ret; |
| 314 | |
| 315 | mutex_lock(&data->update_lock); |
| 316 | temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset; |
| 317 | temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127); |
| 318 | data->temp[nr][index] = temp; |
| 319 | ret = i2c_smbus_write_byte_data(client, |
| 320 | index == 2 ? MAX6697_REG_MAX[nr] |
| 321 | : MAX6697_REG_CRIT[nr], |
| 322 | temp); |
| 323 | mutex_unlock(&data->update_lock); |
| 324 | |
| 325 | return ret < 0 ? ret : count; |
| 326 | } |
| 327 | |
| 328 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0); |
| 329 | static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 330 | 0, MAX6697_TEMP_MAX); |
| 331 | static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 332 | 0, MAX6697_TEMP_CRIT); |
| 333 | |
| 334 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1); |
| 335 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 336 | 1, MAX6697_TEMP_MAX); |
| 337 | static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 338 | 1, MAX6697_TEMP_CRIT); |
| 339 | |
| 340 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2); |
| 341 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 342 | 2, MAX6697_TEMP_MAX); |
| 343 | static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 344 | 2, MAX6697_TEMP_CRIT); |
| 345 | |
| 346 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3); |
| 347 | static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 348 | 3, MAX6697_TEMP_MAX); |
| 349 | static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 350 | 3, MAX6697_TEMP_CRIT); |
| 351 | |
| 352 | static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4); |
| 353 | static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 354 | 4, MAX6697_TEMP_MAX); |
| 355 | static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 356 | 4, MAX6697_TEMP_CRIT); |
| 357 | |
| 358 | static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5); |
| 359 | static SENSOR_DEVICE_ATTR_2(temp6_max, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 360 | 5, MAX6697_TEMP_MAX); |
| 361 | static SENSOR_DEVICE_ATTR_2(temp6_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 362 | 5, MAX6697_TEMP_CRIT); |
| 363 | |
| 364 | static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_input, NULL, 6); |
| 365 | static SENSOR_DEVICE_ATTR_2(temp7_max, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 366 | 6, MAX6697_TEMP_MAX); |
| 367 | static SENSOR_DEVICE_ATTR_2(temp7_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 368 | 6, MAX6697_TEMP_CRIT); |
| 369 | |
| 370 | static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_input, NULL, 7); |
| 371 | static SENSOR_DEVICE_ATTR_2(temp8_max, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 372 | 7, MAX6697_TEMP_MAX); |
| 373 | static SENSOR_DEVICE_ATTR_2(temp8_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, |
| 374 | 7, MAX6697_TEMP_CRIT); |
| 375 | |
| 376 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 22); |
| 377 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 16); |
| 378 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 17); |
| 379 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 18); |
| 380 | static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, 19); |
| 381 | static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO, show_alarm, NULL, 20); |
| 382 | static SENSOR_DEVICE_ATTR(temp7_max_alarm, S_IRUGO, show_alarm, NULL, 21); |
| 383 | static SENSOR_DEVICE_ATTR(temp8_max_alarm, S_IRUGO, show_alarm, NULL, 23); |
| 384 | |
| 385 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14); |
| 386 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8); |
| 387 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9); |
| 388 | static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 10); |
| 389 | static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, 11); |
| 390 | static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO, show_alarm, NULL, 12); |
| 391 | static SENSOR_DEVICE_ATTR(temp7_crit_alarm, S_IRUGO, show_alarm, NULL, 13); |
| 392 | static SENSOR_DEVICE_ATTR(temp8_crit_alarm, S_IRUGO, show_alarm, NULL, 15); |
| 393 | |
| 394 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 1); |
| 395 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2); |
| 396 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, 3); |
| 397 | static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, 4); |
| 398 | static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_alarm, NULL, 5); |
| 399 | static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_alarm, NULL, 6); |
| 400 | static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_alarm, NULL, 7); |
| 401 | |
| 402 | static struct attribute *max6697_attributes[8][7] = { |
| 403 | { |
| 404 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 405 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
| 406 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
| 407 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
| 408 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
| 409 | NULL |
| 410 | }, { |
| 411 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
| 412 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
| 413 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
| 414 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
| 415 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
| 416 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
| 417 | NULL |
| 418 | }, { |
| 419 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
| 420 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
| 421 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, |
| 422 | &sensor_dev_attr_temp3_crit.dev_attr.attr, |
| 423 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, |
| 424 | &sensor_dev_attr_temp3_fault.dev_attr.attr, |
| 425 | NULL |
| 426 | }, { |
| 427 | &sensor_dev_attr_temp4_input.dev_attr.attr, |
| 428 | &sensor_dev_attr_temp4_max.dev_attr.attr, |
| 429 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, |
| 430 | &sensor_dev_attr_temp4_crit.dev_attr.attr, |
| 431 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, |
| 432 | &sensor_dev_attr_temp4_fault.dev_attr.attr, |
| 433 | NULL |
| 434 | }, { |
| 435 | &sensor_dev_attr_temp5_input.dev_attr.attr, |
| 436 | &sensor_dev_attr_temp5_max.dev_attr.attr, |
| 437 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, |
| 438 | &sensor_dev_attr_temp5_crit.dev_attr.attr, |
| 439 | &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, |
| 440 | &sensor_dev_attr_temp5_fault.dev_attr.attr, |
| 441 | NULL |
| 442 | }, { |
| 443 | &sensor_dev_attr_temp6_input.dev_attr.attr, |
| 444 | &sensor_dev_attr_temp6_max.dev_attr.attr, |
| 445 | &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, |
| 446 | &sensor_dev_attr_temp6_crit.dev_attr.attr, |
| 447 | &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, |
| 448 | &sensor_dev_attr_temp6_fault.dev_attr.attr, |
| 449 | NULL |
| 450 | }, { |
| 451 | &sensor_dev_attr_temp7_input.dev_attr.attr, |
| 452 | &sensor_dev_attr_temp7_max.dev_attr.attr, |
| 453 | &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, |
| 454 | &sensor_dev_attr_temp7_crit.dev_attr.attr, |
| 455 | &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, |
| 456 | &sensor_dev_attr_temp7_fault.dev_attr.attr, |
| 457 | NULL |
| 458 | }, { |
| 459 | &sensor_dev_attr_temp8_input.dev_attr.attr, |
| 460 | &sensor_dev_attr_temp8_max.dev_attr.attr, |
| 461 | &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, |
| 462 | &sensor_dev_attr_temp8_crit.dev_attr.attr, |
| 463 | &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, |
| 464 | &sensor_dev_attr_temp8_fault.dev_attr.attr, |
| 465 | NULL |
| 466 | } |
| 467 | }; |
| 468 | |
| 469 | static const struct attribute_group max6697_group[8] = { |
| 470 | { .attrs = max6697_attributes[0] }, |
| 471 | { .attrs = max6697_attributes[1] }, |
| 472 | { .attrs = max6697_attributes[2] }, |
| 473 | { .attrs = max6697_attributes[3] }, |
| 474 | { .attrs = max6697_attributes[4] }, |
| 475 | { .attrs = max6697_attributes[5] }, |
| 476 | { .attrs = max6697_attributes[6] }, |
| 477 | { .attrs = max6697_attributes[7] }, |
| 478 | }; |
| 479 | |
| 480 | static void max6697_get_config_of(struct device_node *node, |
| 481 | struct max6697_platform_data *pdata) |
| 482 | { |
| 483 | int len; |
| 484 | const __be32 *prop; |
| 485 | |
| 486 | prop = of_get_property(node, "smbus-timeout-disable", &len); |
| 487 | if (prop) |
| 488 | pdata->smbus_timeout_disable = true; |
| 489 | prop = of_get_property(node, "extended-range-enable", &len); |
| 490 | if (prop) |
| 491 | pdata->extended_range_enable = true; |
| 492 | prop = of_get_property(node, "beta-compensation-enable", &len); |
| 493 | if (prop) |
| 494 | pdata->beta_compensation = true; |
| 495 | prop = of_get_property(node, "alert-mask", &len); |
| 496 | if (prop && len == sizeof(u32)) |
| 497 | pdata->alert_mask = be32_to_cpu(prop[0]); |
| 498 | prop = of_get_property(node, "over-temperature-mask", &len); |
| 499 | if (prop && len == sizeof(u32)) |
| 500 | pdata->over_temperature_mask = be32_to_cpu(prop[0]); |
| 501 | prop = of_get_property(node, "resistance-cancellation", &len); |
| 502 | if (prop) { |
| 503 | if (len == sizeof(u32)) |
| 504 | pdata->resistance_cancellation = be32_to_cpu(prop[0]); |
| 505 | else |
| 506 | pdata->resistance_cancellation = 0xfe; |
| 507 | } |
| 508 | prop = of_get_property(node, "transistor-ideality", &len); |
| 509 | if (prop && len == 2 * sizeof(u32)) { |
| 510 | pdata->ideality_mask = be32_to_cpu(prop[0]); |
| 511 | pdata->ideality_value = be32_to_cpu(prop[1]); |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | static int max6697_init_chip(struct i2c_client *client) |
| 516 | { |
| 517 | struct max6697_data *data = i2c_get_clientdata(client); |
| 518 | struct max6697_platform_data *pdata = dev_get_platdata(&client->dev); |
| 519 | struct max6697_platform_data p; |
| 520 | const struct max6697_chip_data *chip = data->chip; |
| 521 | int factor = chip->channels; |
| 522 | int ret, reg; |
| 523 | |
| 524 | /* |
| 525 | * Don't touch configuration if neither platform data nor OF |
| 526 | * configuration was specified. If that is the case, use the |
| 527 | * current chip configuration. |
| 528 | */ |
| 529 | if (!pdata && !client->dev.of_node) { |
| 530 | reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); |
| 531 | if (reg < 0) |
| 532 | return reg; |
| 533 | if (data->type == max6581) { |
| 534 | if (reg & MAX6581_CONF_EXTENDED) |
| 535 | data->temp_offset = 64; |
| 536 | reg = i2c_smbus_read_byte_data(client, |
| 537 | MAX6581_REG_RESISTANCE); |
| 538 | if (reg < 0) |
| 539 | return reg; |
| 540 | factor += hweight8(reg); |
| 541 | } else { |
| 542 | if (reg & MAX6697_CONF_RESISTANCE) |
| 543 | factor++; |
| 544 | } |
| 545 | goto done; |
| 546 | } |
| 547 | |
| 548 | if (client->dev.of_node) { |
| 549 | memset(&p, 0, sizeof(p)); |
| 550 | max6697_get_config_of(client->dev.of_node, &p); |
| 551 | pdata = &p; |
| 552 | } |
| 553 | |
| 554 | reg = 0; |
| 555 | if (pdata->smbus_timeout_disable && |
| 556 | (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { |
| 557 | reg |= MAX6697_CONF_TIMEOUT; |
| 558 | } |
| 559 | if (pdata->extended_range_enable && |
| 560 | (chip->valid_conf & MAX6581_CONF_EXTENDED)) { |
| 561 | reg |= MAX6581_CONF_EXTENDED; |
| 562 | data->temp_offset = 64; |
| 563 | } |
| 564 | if (pdata->resistance_cancellation && |
| 565 | (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { |
| 566 | reg |= MAX6697_CONF_RESISTANCE; |
| 567 | factor++; |
| 568 | } |
| 569 | if (pdata->beta_compensation && |
| 570 | (chip->valid_conf & MAX6693_CONF_BETA)) { |
| 571 | reg |= MAX6693_CONF_BETA; |
| 572 | } |
| 573 | |
| 574 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg); |
| 575 | if (ret < 0) |
| 576 | return ret; |
| 577 | |
| 578 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, |
| 579 | MAX6697_MAP_BITS(pdata->alert_mask)); |
| 580 | if (ret < 0) |
| 581 | return ret; |
| 582 | |
| 583 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, |
| 584 | MAX6697_MAP_BITS(pdata->over_temperature_mask)); |
| 585 | if (ret < 0) |
| 586 | return ret; |
| 587 | |
| 588 | if (data->type == max6581) { |
| 589 | factor += hweight8(pdata->resistance_cancellation >> 1); |
| 590 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, |
| 591 | pdata->resistance_cancellation >> 1); |
| 592 | if (ret < 0) |
| 593 | return ret; |
| 594 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, |
| 595 | pdata->ideality_mask >> 1); |
| 596 | if (ret < 0) |
| 597 | return ret; |
| 598 | ret = i2c_smbus_write_byte_data(client, |
| 599 | MAX6581_REG_IDEALITY_SELECT, |
| 600 | pdata->ideality_value); |
| 601 | if (ret < 0) |
| 602 | return ret; |
| 603 | } |
| 604 | done: |
| 605 | data->update_interval = factor * MAX6697_CONV_TIME; |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | static void max6697_remove_files(struct i2c_client *client) |
| 610 | { |
| 611 | int i; |
| 612 | |
| 613 | for (i = 0; i < ARRAY_SIZE(max6697_group); i++) |
| 614 | sysfs_remove_group(&client->dev.kobj, &max6697_group[i]); |
| 615 | } |
| 616 | |
| 617 | static int max6697_probe(struct i2c_client *client, |
| 618 | const struct i2c_device_id *id) |
| 619 | { |
| 620 | struct i2c_adapter *adapter = client->adapter; |
| 621 | struct device *dev = &client->dev; |
| 622 | struct max6697_data *data; |
| 623 | int i, err; |
| 624 | |
| 625 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| 626 | return -ENODEV; |
| 627 | |
| 628 | data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); |
| 629 | if (!data) |
| 630 | return -ENOMEM; |
| 631 | |
| 632 | data->type = id->driver_data; |
| 633 | data->chip = &max6697_chip_data[data->type]; |
| 634 | |
| 635 | i2c_set_clientdata(client, data); |
| 636 | mutex_init(&data->update_lock); |
| 637 | |
| 638 | err = max6697_init_chip(client); |
| 639 | if (err) |
| 640 | return err; |
| 641 | |
| 642 | for (i = 0; i < data->chip->channels; i++) { |
| 643 | err = sysfs_create_file(&dev->kobj, |
| 644 | max6697_attributes[i][0]); |
| 645 | if (err) |
| 646 | goto error; |
| 647 | err = sysfs_create_file(&dev->kobj, |
| 648 | max6697_attributes[i][1]); |
| 649 | if (err) |
| 650 | goto error; |
| 651 | err = sysfs_create_file(&dev->kobj, |
| 652 | max6697_attributes[i][2]); |
| 653 | if (err) |
| 654 | goto error; |
| 655 | |
| 656 | if (data->chip->have_crit & (1 << i)) { |
| 657 | err = sysfs_create_file(&dev->kobj, |
| 658 | max6697_attributes[i][3]); |
| 659 | if (err) |
| 660 | goto error; |
| 661 | err = sysfs_create_file(&dev->kobj, |
| 662 | max6697_attributes[i][4]); |
| 663 | if (err) |
| 664 | goto error; |
| 665 | } |
| 666 | if (data->chip->have_fault & (1 << i)) { |
| 667 | err = sysfs_create_file(&dev->kobj, |
| 668 | max6697_attributes[i][5]); |
| 669 | if (err) |
| 670 | goto error; |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | data->hwmon_dev = hwmon_device_register(dev); |
| 675 | if (IS_ERR(data->hwmon_dev)) { |
| 676 | err = PTR_ERR(data->hwmon_dev); |
| 677 | goto error; |
| 678 | } |
| 679 | |
| 680 | return 0; |
| 681 | |
| 682 | error: |
| 683 | max6697_remove_files(client); |
| 684 | return err; |
| 685 | } |
| 686 | |
| 687 | static int max6697_remove(struct i2c_client *client) |
| 688 | { |
| 689 | struct max6697_data *data = i2c_get_clientdata(client); |
| 690 | |
| 691 | hwmon_device_unregister(data->hwmon_dev); |
| 692 | max6697_remove_files(client); |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | |
| 697 | static const struct i2c_device_id max6697_id[] = { |
| 698 | { "max6581", max6581 }, |
| 699 | { "max6602", max6602 }, |
| 700 | { "max6622", max6622 }, |
| 701 | { "max6636", max6636 }, |
| 702 | { "max6689", max6689 }, |
| 703 | { "max6693", max6693 }, |
| 704 | { "max6694", max6694 }, |
| 705 | { "max6697", max6697 }, |
| 706 | { "max6698", max6698 }, |
| 707 | { "max6699", max6699 }, |
| 708 | { } |
| 709 | }; |
| 710 | MODULE_DEVICE_TABLE(i2c, max6697_id); |
| 711 | |
| 712 | static struct i2c_driver max6697_driver = { |
| 713 | .class = I2C_CLASS_HWMON, |
| 714 | .driver = { |
| 715 | .name = "max6697", |
| 716 | }, |
| 717 | .probe = max6697_probe, |
| 718 | .remove = max6697_remove, |
| 719 | .id_table = max6697_id, |
| 720 | }; |
| 721 | |
| 722 | module_i2c_driver(max6697_driver); |
| 723 | |
| 724 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); |
| 725 | MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); |
| 726 | MODULE_LICENSE("GPL"); |