drivers/hwmon/lm63.c

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This source file includes following definitions.
temp8_from_reg
lut_temp_from_reg
lut_temp_to_reg
lm63_update_lut
lm63_update_device
lm63_lut_looks_bad
show_fan
set_fan
show_pwm1
set_pwm1
pwm1_enable_show
pwm1_enable_store
show_local_temp8
show_remote_temp8
show_lut_temp
set_temp8
show_temp11
set_temp11
temp2_crit_hyst_show
show_lut_temp_hyst
temp2_crit_hyst_store
lm63_set_convrate
update_interval_show
update_interval_store
temp2_type_show
temp2_type_store
alarms_show
show_alarm
lm63_attribute_mode
lm63_detect
lm63_init_client
lm63_probe
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * lm63.c - driver for the National Semiconductor LM63 temperature sensor
   4  *          with integrated fan control
   5  * Copyright (C) 2004-2008  Jean Delvare <jdelvare@suse.de>
   6  * Based on the lm90 driver.
   7  *
   8  * The LM63 is a sensor chip made by National Semiconductor. It measures
   9  * two temperatures (its own and one external one) and the speed of one
  10  * fan, those speed it can additionally control. Complete datasheet can be
  11  * obtained from National's website at:
  12  *   http://www.national.com/pf/LM/LM63.html
  13  *
  14  * The LM63 is basically an LM86 with fan speed monitoring and control
  15  * capabilities added. It misses some of the LM86 features though:
  16  *  - No low limit for local temperature.
  17  *  - No critical limit for local temperature.
  18  *  - Critical limit for remote temperature can be changed only once. We
  19  *    will consider that the critical limit is read-only.
  20  *
  21  * The datasheet isn't very clear about what the tachometer reading is.
  22  * I had a explanation from National Semiconductor though. The two lower
  23  * bits of the read value have to be masked out. The value is still 16 bit
  24  * in width.
  25  */
  26 
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/slab.h>
  30 #include <linux/jiffies.h>
  31 #include <linux/i2c.h>
  32 #include <linux/hwmon-sysfs.h>
  33 #include <linux/hwmon.h>
  34 #include <linux/err.h>
  35 #include <linux/mutex.h>
  36 #include <linux/of_device.h>
  37 #include <linux/sysfs.h>
  38 #include <linux/types.h>
  39 
  40 /*
  41  * Addresses to scan
  42  * Address is fully defined internally and cannot be changed except for
  43  * LM64 which has one pin dedicated to address selection.
  44  * LM63 and LM96163 have address 0x4c.
  45  * LM64 can have address 0x18 or 0x4e.
  46  */
  47 
  48 static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
  49 
  50 /*
  51  * The LM63 registers
  52  */
  53 
  54 #define LM63_REG_CONFIG1                0x03
  55 #define LM63_REG_CONVRATE               0x04
  56 #define LM63_REG_CONFIG2                0xBF
  57 #define LM63_REG_CONFIG_FAN             0x4A
  58 
  59 #define LM63_REG_TACH_COUNT_MSB         0x47
  60 #define LM63_REG_TACH_COUNT_LSB         0x46
  61 #define LM63_REG_TACH_LIMIT_MSB         0x49
  62 #define LM63_REG_TACH_LIMIT_LSB         0x48
  63 
  64 #define LM63_REG_PWM_VALUE              0x4C
  65 #define LM63_REG_PWM_FREQ               0x4D
  66 #define LM63_REG_LUT_TEMP_HYST          0x4F
  67 #define LM63_REG_LUT_TEMP(nr)           (0x50 + 2 * (nr))
  68 #define LM63_REG_LUT_PWM(nr)            (0x51 + 2 * (nr))
  69 
  70 #define LM63_REG_LOCAL_TEMP             0x00
  71 #define LM63_REG_LOCAL_HIGH             0x05
  72 
  73 #define LM63_REG_REMOTE_TEMP_MSB        0x01
  74 #define LM63_REG_REMOTE_TEMP_LSB        0x10
  75 #define LM63_REG_REMOTE_OFFSET_MSB      0x11
  76 #define LM63_REG_REMOTE_OFFSET_LSB      0x12
  77 #define LM63_REG_REMOTE_HIGH_MSB        0x07
  78 #define LM63_REG_REMOTE_HIGH_LSB        0x13
  79 #define LM63_REG_REMOTE_LOW_MSB         0x08
  80 #define LM63_REG_REMOTE_LOW_LSB         0x14
  81 #define LM63_REG_REMOTE_TCRIT           0x19
  82 #define LM63_REG_REMOTE_TCRIT_HYST      0x21
  83 
  84 #define LM63_REG_ALERT_STATUS           0x02
  85 #define LM63_REG_ALERT_MASK             0x16
  86 
  87 #define LM63_REG_MAN_ID                 0xFE
  88 #define LM63_REG_CHIP_ID                0xFF
  89 
  90 #define LM96163_REG_TRUTHERM            0x30
  91 #define LM96163_REG_REMOTE_TEMP_U_MSB   0x31
  92 #define LM96163_REG_REMOTE_TEMP_U_LSB   0x32
  93 #define LM96163_REG_CONFIG_ENHANCED     0x45
  94 
  95 #define LM63_MAX_CONVRATE               9
  96 
  97 #define LM63_MAX_CONVRATE_HZ            32
  98 #define LM96163_MAX_CONVRATE_HZ         26
  99 
 100 /*
 101  * Conversions and various macros
 102  * For tachometer counts, the LM63 uses 16-bit values.
 103  * For local temperature and high limit, remote critical limit and hysteresis
 104  * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
 105  * For remote temperature, low and high limits, it uses signed 11-bit values
 106  * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
 107  * For LM64 the actual remote diode temperature is 16 degree Celsius higher
 108  * than the register reading. Remote temperature setpoints have to be
 109  * adapted accordingly.
 110  */
 111 
 112 #define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
 113                                  5400000 / (reg))
 114 #define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \
 115                                  (5400000 / (val)) & 0xFFFC)
 116 #define TEMP8_FROM_REG(reg)     ((reg) * 1000)
 117 #define TEMP8_TO_REG(val)       DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
 118                                                             127000), 1000)
 119 #define TEMP8U_TO_REG(val)      DIV_ROUND_CLOSEST(clamp_val((val), 0, \
 120                                                             255000), 1000)
 121 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 122 #define TEMP11_TO_REG(val)      (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
 123                                                              127875), 125) * 32)
 124 #define TEMP11U_TO_REG(val)     (DIV_ROUND_CLOSEST(clamp_val((val), 0, \
 125                                                              255875), 125) * 32)
 126 #define HYST_TO_REG(val)        DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \
 127                                                   1000)
 128 
 129 #define UPDATE_INTERVAL(max, rate) \
 130                         ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max))
 131 
 132 enum chips { lm63, lm64, lm96163 };
 133 
 134 /*
 135  * Client data (each client gets its own)
 136  */
 137 
 138 struct lm63_data {
 139         struct i2c_client *client;
 140         struct mutex update_lock;
 141         const struct attribute_group *groups[5];
 142         char valid; /* zero until following fields are valid */
 143         char lut_valid; /* zero until lut fields are valid */
 144         unsigned long last_updated; /* in jiffies */
 145         unsigned long lut_last_updated; /* in jiffies */
 146         enum chips kind;
 147         int temp2_offset;
 148 
 149         int update_interval;    /* in milliseconds */
 150         int max_convrate_hz;
 151         int lut_size;           /* 8 or 12 */
 152 
 153         /* registers values */
 154         u8 config, config_fan;
 155         u16 fan[2];     /* 0: input
 156                            1: low limit */
 157         u8 pwm1_freq;
 158         u8 pwm1[13];    /* 0: current output
 159                            1-12: lookup table */
 160         s8 temp8[15];   /* 0: local input
 161                            1: local high limit
 162                            2: remote critical limit
 163                            3-14: lookup table */
 164         s16 temp11[4];  /* 0: remote input
 165                            1: remote low limit
 166                            2: remote high limit
 167                            3: remote offset */
 168         u16 temp11u;    /* remote input (unsigned) */
 169         u8 temp2_crit_hyst;
 170         u8 lut_temp_hyst;
 171         u8 alarms;
 172         bool pwm_highres;
 173         bool lut_temp_highres;
 174         bool remote_unsigned; /* true if unsigned remote upper limits */
 175         bool trutherm;
 176 };
 177 
 178 static inline int temp8_from_reg(struct lm63_data *data, int nr)
 179 {
 180         if (data->remote_unsigned)
 181                 return TEMP8_FROM_REG((u8)data->temp8[nr]);
 182         return TEMP8_FROM_REG(data->temp8[nr]);
 183 }
 184 
 185 static inline int lut_temp_from_reg(struct lm63_data *data, int nr)
 186 {
 187         return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000);
 188 }
 189 
 190 static inline int lut_temp_to_reg(struct lm63_data *data, long val)
 191 {
 192         val -= data->temp2_offset;
 193         if (data->lut_temp_highres)
 194                 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500);
 195         else
 196                 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000);
 197 }
 198 
 199 /*
 200  * Update the lookup table register cache.
 201  * client->update_lock must be held when calling this function.
 202  */
 203 static void lm63_update_lut(struct lm63_data *data)
 204 {
 205         struct i2c_client *client = data->client;
 206         int i;
 207 
 208         if (time_after(jiffies, data->lut_last_updated + 5 * HZ) ||
 209             !data->lut_valid) {
 210                 for (i = 0; i < data->lut_size; i++) {
 211                         data->pwm1[1 + i] = i2c_smbus_read_byte_data(client,
 212                                             LM63_REG_LUT_PWM(i));
 213                         data->temp8[3 + i] = i2c_smbus_read_byte_data(client,
 214                                              LM63_REG_LUT_TEMP(i));
 215                 }
 216                 data->lut_temp_hyst = i2c_smbus_read_byte_data(client,
 217                                       LM63_REG_LUT_TEMP_HYST);
 218 
 219                 data->lut_last_updated = jiffies;
 220                 data->lut_valid = 1;
 221         }
 222 }
 223 
 224 static struct lm63_data *lm63_update_device(struct device *dev)
 225 {
 226         struct lm63_data *data = dev_get_drvdata(dev);
 227         struct i2c_client *client = data->client;
 228         unsigned long next_update;
 229 
 230         mutex_lock(&data->update_lock);
 231 
 232         next_update = data->last_updated +
 233                       msecs_to_jiffies(data->update_interval);
 234         if (time_after(jiffies, next_update) || !data->valid) {
 235                 if (data->config & 0x04) { /* tachometer enabled  */
 236                         /* order matters for fan1_input */
 237                         data->fan[0] = i2c_smbus_read_byte_data(client,
 238                                        LM63_REG_TACH_COUNT_LSB) & 0xFC;
 239                         data->fan[0] |= i2c_smbus_read_byte_data(client,
 240                                         LM63_REG_TACH_COUNT_MSB) << 8;
 241                         data->fan[1] = (i2c_smbus_read_byte_data(client,
 242                                         LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 243                                      | (i2c_smbus_read_byte_data(client,
 244                                         LM63_REG_TACH_LIMIT_MSB) << 8);
 245                 }
 246 
 247                 data->pwm1_freq = i2c_smbus_read_byte_data(client,
 248                                   LM63_REG_PWM_FREQ);
 249                 if (data->pwm1_freq == 0)
 250                         data->pwm1_freq = 1;
 251                 data->pwm1[0] = i2c_smbus_read_byte_data(client,
 252                                 LM63_REG_PWM_VALUE);
 253 
 254                 data->temp8[0] = i2c_smbus_read_byte_data(client,
 255                                  LM63_REG_LOCAL_TEMP);
 256                 data->temp8[1] = i2c_smbus_read_byte_data(client,
 257                                  LM63_REG_LOCAL_HIGH);
 258 
 259                 /* order matters for temp2_input */
 260                 data->temp11[0] = i2c_smbus_read_byte_data(client,
 261                                   LM63_REG_REMOTE_TEMP_MSB) << 8;
 262                 data->temp11[0] |= i2c_smbus_read_byte_data(client,
 263                                    LM63_REG_REMOTE_TEMP_LSB);
 264                 data->temp11[1] = (i2c_smbus_read_byte_data(client,
 265                                   LM63_REG_REMOTE_LOW_MSB) << 8)
 266                                 | i2c_smbus_read_byte_data(client,
 267                                   LM63_REG_REMOTE_LOW_LSB);
 268                 data->temp11[2] = (i2c_smbus_read_byte_data(client,
 269                                   LM63_REG_REMOTE_HIGH_MSB) << 8)
 270                                 | i2c_smbus_read_byte_data(client,
 271                                   LM63_REG_REMOTE_HIGH_LSB);
 272                 data->temp11[3] = (i2c_smbus_read_byte_data(client,
 273                                   LM63_REG_REMOTE_OFFSET_MSB) << 8)
 274                                 | i2c_smbus_read_byte_data(client,
 275                                   LM63_REG_REMOTE_OFFSET_LSB);
 276 
 277                 if (data->kind == lm96163)
 278                         data->temp11u = (i2c_smbus_read_byte_data(client,
 279                                         LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
 280                                       | i2c_smbus_read_byte_data(client,
 281                                         LM96163_REG_REMOTE_TEMP_U_LSB);
 282 
 283                 data->temp8[2] = i2c_smbus_read_byte_data(client,
 284                                  LM63_REG_REMOTE_TCRIT);
 285                 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 286                                         LM63_REG_REMOTE_TCRIT_HYST);
 287 
 288                 data->alarms = i2c_smbus_read_byte_data(client,
 289                                LM63_REG_ALERT_STATUS) & 0x7F;
 290 
 291                 data->last_updated = jiffies;
 292                 data->valid = 1;
 293         }
 294 
 295         lm63_update_lut(data);
 296 
 297         mutex_unlock(&data->update_lock);
 298 
 299         return data;
 300 }
 301 
 302 /*
 303  * Trip points in the lookup table should be in ascending order for both
 304  * temperatures and PWM output values.
 305  */
 306 static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data)
 307 {
 308         int i;
 309 
 310         mutex_lock(&data->update_lock);
 311         lm63_update_lut(data);
 312 
 313         for (i = 1; i < data->lut_size; i++) {
 314                 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i]
 315                  || data->temp8[3 + i - 1] > data->temp8[3 + i]) {
 316                         dev_warn(dev,
 317                                  "Lookup table doesn't look sane (check entries %d and %d)\n",
 318                                  i, i + 1);
 319                         break;
 320                 }
 321         }
 322         mutex_unlock(&data->update_lock);
 323 
 324         return i == data->lut_size ? 0 : 1;
 325 }
 326 
 327 /*
 328  * Sysfs callback functions and files
 329  */
 330 
 331 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 332                         char *buf)
 333 {
 334         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 335         struct lm63_data *data = lm63_update_device(dev);
 336         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 337 }
 338 
 339 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 340                        const char *buf, size_t count)
 341 {
 342         struct lm63_data *data = dev_get_drvdata(dev);
 343         struct i2c_client *client = data->client;
 344         unsigned long val;
 345         int err;
 346 
 347         err = kstrtoul(buf, 10, &val);
 348         if (err)
 349                 return err;
 350 
 351         mutex_lock(&data->update_lock);
 352         data->fan[1] = FAN_TO_REG(val);
 353         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 354                                   data->fan[1] & 0xFF);
 355         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 356                                   data->fan[1] >> 8);
 357         mutex_unlock(&data->update_lock);
 358         return count;
 359 }
 360 
 361 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
 362                          char *buf)
 363 {
 364         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 365         struct lm63_data *data = lm63_update_device(dev);
 366         int nr = attr->index;
 367         int pwm;
 368 
 369         if (data->pwm_highres)
 370                 pwm = data->pwm1[nr];
 371         else
 372                 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
 373                        255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
 374                        (2 * data->pwm1_freq);
 375 
 376         return sprintf(buf, "%d\n", pwm);
 377 }
 378 
 379 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
 380                         const char *buf, size_t count)
 381 {
 382         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 383         struct lm63_data *data = dev_get_drvdata(dev);
 384         struct i2c_client *client = data->client;
 385         int nr = attr->index;
 386         unsigned long val;
 387         int err;
 388         u8 reg;
 389 
 390         if (!(data->config_fan & 0x20)) /* register is read-only */
 391                 return -EPERM;
 392 
 393         err = kstrtoul(buf, 10, &val);
 394         if (err)
 395                 return err;
 396 
 397         reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
 398         val = clamp_val(val, 0, 255);
 399 
 400         mutex_lock(&data->update_lock);
 401         data->pwm1[nr] = data->pwm_highres ? val :
 402                         (val * data->pwm1_freq * 2 + 127) / 255;
 403         i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
 404         mutex_unlock(&data->update_lock);
 405         return count;
 406 }
 407 
 408 static ssize_t pwm1_enable_show(struct device *dev,
 409                                 struct device_attribute *dummy, char *buf)
 410 {
 411         struct lm63_data *data = lm63_update_device(dev);
 412         return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 413 }
 414 
 415 static ssize_t pwm1_enable_store(struct device *dev,
 416                                  struct device_attribute *dummy,
 417                                  const char *buf, size_t count)
 418 {
 419         struct lm63_data *data = dev_get_drvdata(dev);
 420         struct i2c_client *client = data->client;
 421         unsigned long val;
 422         int err;
 423 
 424         err = kstrtoul(buf, 10, &val);
 425         if (err)
 426                 return err;
 427         if (val < 1 || val > 2)
 428                 return -EINVAL;
 429 
 430         /*
 431          * Only let the user switch to automatic mode if the lookup table
 432          * looks sane.
 433          */
 434         if (val == 2 && lm63_lut_looks_bad(dev, data))
 435                 return -EPERM;
 436 
 437         mutex_lock(&data->update_lock);
 438         data->config_fan = i2c_smbus_read_byte_data(client,
 439                                                     LM63_REG_CONFIG_FAN);
 440         if (val == 1)
 441                 data->config_fan |= 0x20;
 442         else
 443                 data->config_fan &= ~0x20;
 444         i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
 445                                   data->config_fan);
 446         mutex_unlock(&data->update_lock);
 447         return count;
 448 }
 449 
 450 /*
 451  * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
 452  * For remote sensor registers temp2_offset has to be considered,
 453  * for local sensor it must not.
 454  * So we need separate 8bit accessors for local and remote sensor.
 455  */
 456 static ssize_t show_local_temp8(struct device *dev,
 457                                 struct device_attribute *devattr,
 458                                 char *buf)
 459 {
 460         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 461         struct lm63_data *data = lm63_update_device(dev);
 462         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 463 }
 464 
 465 static ssize_t show_remote_temp8(struct device *dev,
 466                                  struct device_attribute *devattr,
 467                                  char *buf)
 468 {
 469         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 470         struct lm63_data *data = lm63_update_device(dev);
 471         return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
 472                        + data->temp2_offset);
 473 }
 474 
 475 static ssize_t show_lut_temp(struct device *dev,
 476                               struct device_attribute *devattr,
 477                               char *buf)
 478 {
 479         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 480         struct lm63_data *data = lm63_update_device(dev);
 481         return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
 482                        + data->temp2_offset);
 483 }
 484 
 485 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
 486                          const char *buf, size_t count)
 487 {
 488         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 489         struct lm63_data *data = dev_get_drvdata(dev);
 490         struct i2c_client *client = data->client;
 491         int nr = attr->index;
 492         long val;
 493         int err;
 494         int temp;
 495         u8 reg;
 496 
 497         err = kstrtol(buf, 10, &val);
 498         if (err)
 499                 return err;
 500 
 501         mutex_lock(&data->update_lock);
 502         switch (nr) {
 503         case 2:
 504                 reg = LM63_REG_REMOTE_TCRIT;
 505                 if (data->remote_unsigned)
 506                         temp = TEMP8U_TO_REG(val - data->temp2_offset);
 507                 else
 508                         temp = TEMP8_TO_REG(val - data->temp2_offset);
 509                 break;
 510         case 1:
 511                 reg = LM63_REG_LOCAL_HIGH;
 512                 temp = TEMP8_TO_REG(val);
 513                 break;
 514         default:        /* lookup table */
 515                 reg = LM63_REG_LUT_TEMP(nr - 3);
 516                 temp = lut_temp_to_reg(data, val);
 517         }
 518         data->temp8[nr] = temp;
 519         i2c_smbus_write_byte_data(client, reg, temp);
 520         mutex_unlock(&data->update_lock);
 521         return count;
 522 }
 523 
 524 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 525                            char *buf)
 526 {
 527         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 528         struct lm63_data *data = lm63_update_device(dev);
 529         int nr = attr->index;
 530         int temp;
 531 
 532         if (!nr) {
 533                 /*
 534                  * Use unsigned temperature unless its value is zero.
 535                  * If it is zero, use signed temperature.
 536                  */
 537                 if (data->temp11u)
 538                         temp = TEMP11_FROM_REG(data->temp11u);
 539                 else
 540                         temp = TEMP11_FROM_REG(data->temp11[nr]);
 541         } else {
 542                 if (data->remote_unsigned && nr == 2)
 543                         temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
 544                 else
 545                         temp = TEMP11_FROM_REG(data->temp11[nr]);
 546         }
 547         return sprintf(buf, "%d\n", temp + data->temp2_offset);
 548 }
 549 
 550 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 551                           const char *buf, size_t count)
 552 {
 553         static const u8 reg[6] = {
 554                 LM63_REG_REMOTE_LOW_MSB,
 555                 LM63_REG_REMOTE_LOW_LSB,
 556                 LM63_REG_REMOTE_HIGH_MSB,
 557                 LM63_REG_REMOTE_HIGH_LSB,
 558                 LM63_REG_REMOTE_OFFSET_MSB,
 559                 LM63_REG_REMOTE_OFFSET_LSB,
 560         };
 561 
 562         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 563         struct lm63_data *data = dev_get_drvdata(dev);
 564         struct i2c_client *client = data->client;
 565         long val;
 566         int err;
 567         int nr = attr->index;
 568 
 569         err = kstrtol(buf, 10, &val);
 570         if (err)
 571                 return err;
 572 
 573         mutex_lock(&data->update_lock);
 574         if (data->remote_unsigned && nr == 2)
 575                 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
 576         else
 577                 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
 578 
 579         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 580                                   data->temp11[nr] >> 8);
 581         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 582                                   data->temp11[nr] & 0xff);
 583         mutex_unlock(&data->update_lock);
 584         return count;
 585 }
 586 
 587 /*
 588  * Hysteresis register holds a relative value, while we want to present
 589  * an absolute to user-space
 590  */
 591 static ssize_t temp2_crit_hyst_show(struct device *dev,
 592                                     struct device_attribute *dummy, char *buf)
 593 {
 594         struct lm63_data *data = lm63_update_device(dev);
 595         return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
 596                        + data->temp2_offset
 597                        - TEMP8_FROM_REG(data->temp2_crit_hyst));
 598 }
 599 
 600 static ssize_t show_lut_temp_hyst(struct device *dev,
 601                                   struct device_attribute *devattr, char *buf)
 602 {
 603         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 604         struct lm63_data *data = lm63_update_device(dev);
 605 
 606         return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
 607                        + data->temp2_offset
 608                        - TEMP8_FROM_REG(data->lut_temp_hyst));
 609 }
 610 
 611 /*
 612  * And now the other way around, user-space provides an absolute
 613  * hysteresis value and we have to store a relative one
 614  */
 615 static ssize_t temp2_crit_hyst_store(struct device *dev,
 616                                      struct device_attribute *dummy,
 617                                      const char *buf, size_t count)
 618 {
 619         struct lm63_data *data = dev_get_drvdata(dev);
 620         struct i2c_client *client = data->client;
 621         long val;
 622         int err;
 623         long hyst;
 624 
 625         err = kstrtol(buf, 10, &val);
 626         if (err)
 627                 return err;
 628 
 629         mutex_lock(&data->update_lock);
 630         hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
 631         i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 632                                   HYST_TO_REG(hyst));
 633         mutex_unlock(&data->update_lock);
 634         return count;
 635 }
 636 
 637 /*
 638  * Set conversion rate.
 639  * client->update_lock must be held when calling this function.
 640  */
 641 static void lm63_set_convrate(struct lm63_data *data, unsigned int interval)
 642 {
 643         struct i2c_client *client = data->client;
 644         unsigned int update_interval;
 645         int i;
 646 
 647         /* Shift calculations to avoid rounding errors */
 648         interval <<= 6;
 649 
 650         /* find the nearest update rate */
 651         update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
 652           / data->max_convrate_hz;
 653         for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
 654                 if (interval >= update_interval * 3 / 4)
 655                         break;
 656 
 657         i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
 658         data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
 659 }
 660 
 661 static ssize_t update_interval_show(struct device *dev,
 662                                     struct device_attribute *attr, char *buf)
 663 {
 664         struct lm63_data *data = dev_get_drvdata(dev);
 665 
 666         return sprintf(buf, "%u\n", data->update_interval);
 667 }
 668 
 669 static ssize_t update_interval_store(struct device *dev,
 670                                      struct device_attribute *attr,
 671                                      const char *buf, size_t count)
 672 {
 673         struct lm63_data *data = dev_get_drvdata(dev);
 674         unsigned long val;
 675         int err;
 676 
 677         err = kstrtoul(buf, 10, &val);
 678         if (err)
 679                 return err;
 680 
 681         mutex_lock(&data->update_lock);
 682         lm63_set_convrate(data, clamp_val(val, 0, 100000));
 683         mutex_unlock(&data->update_lock);
 684 
 685         return count;
 686 }
 687 
 688 static ssize_t temp2_type_show(struct device *dev,
 689                                struct device_attribute *attr, char *buf)
 690 {
 691         struct lm63_data *data = dev_get_drvdata(dev);
 692 
 693         return sprintf(buf, data->trutherm ? "1\n" : "2\n");
 694 }
 695 
 696 static ssize_t temp2_type_store(struct device *dev,
 697                                 struct device_attribute *attr,
 698                                 const char *buf, size_t count)
 699 {
 700         struct lm63_data *data = dev_get_drvdata(dev);
 701         struct i2c_client *client = data->client;
 702         unsigned long val;
 703         int ret;
 704         u8 reg;
 705 
 706         ret = kstrtoul(buf, 10, &val);
 707         if (ret < 0)
 708                 return ret;
 709         if (val != 1 && val != 2)
 710                 return -EINVAL;
 711 
 712         mutex_lock(&data->update_lock);
 713         data->trutherm = val == 1;
 714         reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
 715         i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
 716                                   reg | (data->trutherm ? 0x02 : 0x00));
 717         data->valid = 0;
 718         mutex_unlock(&data->update_lock);
 719 
 720         return count;
 721 }
 722 
 723 static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy,
 724                            char *buf)
 725 {
 726         struct lm63_data *data = lm63_update_device(dev);
 727         return sprintf(buf, "%u\n", data->alarms);
 728 }
 729 
 730 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 731                           char *buf)
 732 {
 733         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 734         struct lm63_data *data = lm63_update_device(dev);
 735         int bitnr = attr->index;
 736 
 737         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 738 }
 739 
 740 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 741 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 742         set_fan, 1);
 743 
 744 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
 745 static DEVICE_ATTR_RW(pwm1_enable);
 746 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
 747         show_pwm1, set_pwm1, 1);
 748 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
 749         show_lut_temp, set_temp8, 3);
 750 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
 751         show_lut_temp_hyst, NULL, 3);
 752 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
 753         show_pwm1, set_pwm1, 2);
 754 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
 755         show_lut_temp, set_temp8, 4);
 756 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
 757         show_lut_temp_hyst, NULL, 4);
 758 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
 759         show_pwm1, set_pwm1, 3);
 760 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
 761         show_lut_temp, set_temp8, 5);
 762 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
 763         show_lut_temp_hyst, NULL, 5);
 764 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
 765         show_pwm1, set_pwm1, 4);
 766 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
 767         show_lut_temp, set_temp8, 6);
 768 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
 769         show_lut_temp_hyst, NULL, 6);
 770 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
 771         show_pwm1, set_pwm1, 5);
 772 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
 773         show_lut_temp, set_temp8, 7);
 774 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
 775         show_lut_temp_hyst, NULL, 7);
 776 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
 777         show_pwm1, set_pwm1, 6);
 778 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
 779         show_lut_temp, set_temp8, 8);
 780 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
 781         show_lut_temp_hyst, NULL, 8);
 782 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
 783         show_pwm1, set_pwm1, 7);
 784 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
 785         show_lut_temp, set_temp8, 9);
 786 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
 787         show_lut_temp_hyst, NULL, 9);
 788 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
 789         show_pwm1, set_pwm1, 8);
 790 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
 791         show_lut_temp, set_temp8, 10);
 792 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
 793         show_lut_temp_hyst, NULL, 10);
 794 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
 795         show_pwm1, set_pwm1, 9);
 796 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
 797         show_lut_temp, set_temp8, 11);
 798 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
 799         show_lut_temp_hyst, NULL, 11);
 800 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
 801         show_pwm1, set_pwm1, 10);
 802 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
 803         show_lut_temp, set_temp8, 12);
 804 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
 805         show_lut_temp_hyst, NULL, 12);
 806 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
 807         show_pwm1, set_pwm1, 11);
 808 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
 809         show_lut_temp, set_temp8, 13);
 810 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
 811         show_lut_temp_hyst, NULL, 13);
 812 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
 813         show_pwm1, set_pwm1, 12);
 814 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
 815         show_lut_temp, set_temp8, 14);
 816 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
 817         show_lut_temp_hyst, NULL, 14);
 818 
 819 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
 820 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
 821         set_temp8, 1);
 822 
 823 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 824 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 825         set_temp11, 1);
 826 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 827         set_temp11, 2);
 828 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
 829         set_temp11, 3);
 830 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
 831         set_temp8, 2);
 832 static DEVICE_ATTR_RW(temp2_crit_hyst);
 833 
 834 static DEVICE_ATTR_RW(temp2_type);
 835 
 836 /* Individual alarm files */
 837 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 838 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 839 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 840 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 841 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 842 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 843 /* Raw alarm file for compatibility */
 844 static DEVICE_ATTR_RO(alarms);
 845 
 846 static DEVICE_ATTR_RW(update_interval);
 847 
 848 static struct attribute *lm63_attributes[] = {
 849         &sensor_dev_attr_pwm1.dev_attr.attr,
 850         &dev_attr_pwm1_enable.attr,
 851         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
 852         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
 853         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
 854         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
 855         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
 856         &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
 857         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
 858         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
 859         &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
 860         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
 861         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
 862         &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
 863         &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
 864         &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
 865         &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
 866         &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
 867         &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
 868         &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
 869         &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
 870         &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
 871         &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
 872         &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
 873         &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
 874         &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
 875 
 876         &sensor_dev_attr_temp1_input.dev_attr.attr,
 877         &sensor_dev_attr_temp2_input.dev_attr.attr,
 878         &sensor_dev_attr_temp2_min.dev_attr.attr,
 879         &sensor_dev_attr_temp1_max.dev_attr.attr,
 880         &sensor_dev_attr_temp2_max.dev_attr.attr,
 881         &sensor_dev_attr_temp2_offset.dev_attr.attr,
 882         &sensor_dev_attr_temp2_crit.dev_attr.attr,
 883         &dev_attr_temp2_crit_hyst.attr,
 884 
 885         &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 886         &sensor_dev_attr_temp2_fault.dev_attr.attr,
 887         &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 888         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 889         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 890         &dev_attr_alarms.attr,
 891         &dev_attr_update_interval.attr,
 892         NULL
 893 };
 894 
 895 static struct attribute *lm63_attributes_temp2_type[] = {
 896         &dev_attr_temp2_type.attr,
 897         NULL
 898 };
 899 
 900 static const struct attribute_group lm63_group_temp2_type = {
 901         .attrs = lm63_attributes_temp2_type,
 902 };
 903 
 904 static struct attribute *lm63_attributes_extra_lut[] = {
 905         &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr,
 906         &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr,
 907         &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr,
 908         &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr,
 909         &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr,
 910         &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr,
 911         &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr,
 912         &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr,
 913         &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr,
 914         &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr,
 915         &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr,
 916         &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr,
 917         NULL
 918 };
 919 
 920 static const struct attribute_group lm63_group_extra_lut = {
 921         .attrs = lm63_attributes_extra_lut,
 922 };
 923 
 924 /*
 925  * On LM63, temp2_crit can be set only once, which should be job
 926  * of the bootloader.
 927  * On LM64, temp2_crit can always be set.
 928  * On LM96163, temp2_crit can be set if bit 1 of the configuration
 929  * register is true.
 930  */
 931 static umode_t lm63_attribute_mode(struct kobject *kobj,
 932                                    struct attribute *attr, int index)
 933 {
 934         struct device *dev = container_of(kobj, struct device, kobj);
 935         struct lm63_data *data = dev_get_drvdata(dev);
 936 
 937         if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
 938             && (data->kind == lm64 ||
 939                 (data->kind == lm96163 && (data->config & 0x02))))
 940                 return attr->mode | S_IWUSR;
 941 
 942         return attr->mode;
 943 }
 944 
 945 static const struct attribute_group lm63_group = {
 946         .is_visible = lm63_attribute_mode,
 947         .attrs = lm63_attributes,
 948 };
 949 
 950 static struct attribute *lm63_attributes_fan1[] = {
 951         &sensor_dev_attr_fan1_input.dev_attr.attr,
 952         &sensor_dev_attr_fan1_min.dev_attr.attr,
 953 
 954         &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 955         NULL
 956 };
 957 
 958 static const struct attribute_group lm63_group_fan1 = {
 959         .attrs = lm63_attributes_fan1,
 960 };
 961 
 962 /*
 963  * Real code
 964  */
 965 
 966 /* Return 0 if detection is successful, -ENODEV otherwise */
 967 static int lm63_detect(struct i2c_client *client,
 968                        struct i2c_board_info *info)
 969 {
 970         struct i2c_adapter *adapter = client->adapter;
 971         u8 man_id, chip_id, reg_config1, reg_config2;
 972         u8 reg_alert_status, reg_alert_mask;
 973         int address = client->addr;
 974 
 975         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 976                 return -ENODEV;
 977 
 978         man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
 979         chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
 980 
 981         reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 982         reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
 983         reg_alert_status = i2c_smbus_read_byte_data(client,
 984                            LM63_REG_ALERT_STATUS);
 985         reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
 986 
 987         if (man_id != 0x01 /* National Semiconductor */
 988          || (reg_config1 & 0x18) != 0x00
 989          || (reg_config2 & 0xF8) != 0x00
 990          || (reg_alert_status & 0x20) != 0x00
 991          || (reg_alert_mask & 0xA4) != 0xA4) {
 992                 dev_dbg(&adapter->dev,
 993                         "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
 994                         man_id, chip_id);
 995                 return -ENODEV;
 996         }
 997 
 998         if (chip_id == 0x41 && address == 0x4c)
 999                 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
1000         else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
1001                 strlcpy(info->type, "lm64", I2C_NAME_SIZE);
1002         else if (chip_id == 0x49 && address == 0x4c)
1003                 strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
1004         else
1005                 return -ENODEV;
1006 
1007         return 0;
1008 }
1009 
1010 /*
1011  * Ideally we shouldn't have to initialize anything, since the BIOS
1012  * should have taken care of everything
1013  */
1014 static void lm63_init_client(struct lm63_data *data)
1015 {
1016         struct i2c_client *client = data->client;
1017         struct device *dev = &client->dev;
1018         u8 convrate;
1019 
1020         data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1021         data->config_fan = i2c_smbus_read_byte_data(client,
1022                                                     LM63_REG_CONFIG_FAN);
1023 
1024         /* Start converting if needed */
1025         if (data->config & 0x40) { /* standby */
1026                 dev_dbg(dev, "Switching to operational mode\n");
1027                 data->config &= 0xA7;
1028                 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
1029                                           data->config);
1030         }
1031         /* Tachometer is always enabled on LM64 */
1032         if (data->kind == lm64)
1033                 data->config |= 0x04;
1034 
1035         /* We may need pwm1_freq before ever updating the client data */
1036         data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
1037         if (data->pwm1_freq == 0)
1038                 data->pwm1_freq = 1;
1039 
1040         switch (data->kind) {
1041         case lm63:
1042         case lm64:
1043                 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
1044                 data->lut_size = 8;
1045                 break;
1046         case lm96163:
1047                 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
1048                 data->lut_size = 12;
1049                 data->trutherm
1050                   = i2c_smbus_read_byte_data(client,
1051                                              LM96163_REG_TRUTHERM) & 0x02;
1052                 break;
1053         }
1054         convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
1055         if (unlikely(convrate > LM63_MAX_CONVRATE))
1056                 convrate = LM63_MAX_CONVRATE;
1057         data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
1058                                                 convrate);
1059 
1060         /*
1061          * For LM96163, check if high resolution PWM
1062          * and unsigned temperature format is enabled.
1063          */
1064         if (data->kind == lm96163) {
1065                 u8 config_enhanced
1066                   = i2c_smbus_read_byte_data(client,
1067                                              LM96163_REG_CONFIG_ENHANCED);
1068                 if (config_enhanced & 0x20)
1069                         data->lut_temp_highres = true;
1070                 if ((config_enhanced & 0x10)
1071                     && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
1072                         data->pwm_highres = true;
1073                 if (config_enhanced & 0x08)
1074                         data->remote_unsigned = true;
1075         }
1076 
1077         /* Show some debug info about the LM63 configuration */
1078         if (data->kind == lm63)
1079                 dev_dbg(dev, "Alert/tach pin configured for %s\n",
1080                         (data->config & 0x04) ? "tachometer input" :
1081                         "alert output");
1082         dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n",
1083                 (data->config_fan & 0x08) ? "1.4" : "360",
1084                 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
1085         dev_dbg(dev, "PWM output active %s, %s mode\n",
1086                 (data->config_fan & 0x10) ? "low" : "high",
1087                 (data->config_fan & 0x20) ? "manual" : "auto");
1088 }
1089 
1090 static int lm63_probe(struct i2c_client *client,
1091                       const struct i2c_device_id *id)
1092 {
1093         struct device *dev = &client->dev;
1094         struct device *hwmon_dev;
1095         struct lm63_data *data;
1096         int groups = 0;
1097 
1098         data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL);
1099         if (!data)
1100                 return -ENOMEM;
1101 
1102         data->client = client;
1103         mutex_init(&data->update_lock);
1104 
1105         /* Set the device type */
1106         if (client->dev.of_node)
1107                 data->kind = (enum chips)of_device_get_match_data(&client->dev);
1108         else
1109                 data->kind = id->driver_data;
1110         if (data->kind == lm64)
1111                 data->temp2_offset = 16000;
1112 
1113         /* Initialize chip */
1114         lm63_init_client(data);
1115 
1116         /* Register sysfs hooks */
1117         data->groups[groups++] = &lm63_group;
1118         if (data->config & 0x04)        /* tachometer enabled */
1119                 data->groups[groups++] = &lm63_group_fan1;
1120 
1121         if (data->kind == lm96163) {
1122                 data->groups[groups++] = &lm63_group_temp2_type;
1123                 data->groups[groups++] = &lm63_group_extra_lut;
1124         }
1125 
1126         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1127                                                            data, data->groups);
1128         return PTR_ERR_OR_ZERO(hwmon_dev);
1129 }
1130 
1131 /*
1132  * Driver data (common to all clients)
1133  */
1134 
1135 static const struct i2c_device_id lm63_id[] = {
1136         { "lm63", lm63 },
1137         { "lm64", lm64 },
1138         { "lm96163", lm96163 },
1139         { }
1140 };
1141 MODULE_DEVICE_TABLE(i2c, lm63_id);
1142 
1143 static const struct of_device_id __maybe_unused lm63_of_match[] = {
1144         {
1145                 .compatible = "national,lm63",
1146                 .data = (void *)lm63
1147         },
1148         {
1149                 .compatible = "national,lm64",
1150                 .data = (void *)lm64
1151         },
1152         {
1153                 .compatible = "national,lm96163",
1154                 .data = (void *)lm96163
1155         },
1156         { },
1157 };
1158 MODULE_DEVICE_TABLE(of, lm63_of_match);
1159 
1160 static struct i2c_driver lm63_driver = {
1161         .class          = I2C_CLASS_HWMON,
1162         .driver = {
1163                 .name   = "lm63",
1164                 .of_match_table = of_match_ptr(lm63_of_match),
1165         },
1166         .probe          = lm63_probe,
1167         .id_table       = lm63_id,
1168         .detect         = lm63_detect,
1169         .address_list   = normal_i2c,
1170 };
1171 
1172 module_i2c_driver(lm63_driver);
1173 
1174 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1175 MODULE_DESCRIPTION("LM63 driver");
1176 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/hwmon/lm63.c

DEFINITIONS
