linux/drivers/hwmon/lm63.c
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   1/*
   2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
   3 *          with integrated fan control
   4 * Copyright (C) 2004-2008  Jean Delvare <khali@linux-fr.org>
   5 * Based on the lm90 driver.
   6 *
   7 * The LM63 is a sensor chip made by National Semiconductor. It measures
   8 * two temperatures (its own and one external one) and the speed of one
   9 * fan, those speed it can additionally control. Complete datasheet can be
  10 * obtained from National's website at:
  11 *   http://www.national.com/pf/LM/LM63.html
  12 *
  13 * The LM63 is basically an LM86 with fan speed monitoring and control
  14 * capabilities added. It misses some of the LM86 features though:
  15 *  - No low limit for local temperature.
  16 *  - No critical limit for local temperature.
  17 *  - Critical limit for remote temperature can be changed only once. We
  18 *    will consider that the critical limit is read-only.
  19 *
  20 * The datasheet isn't very clear about what the tachometer reading is.
  21 * I had a explanation from National Semiconductor though. The two lower
  22 * bits of the read value have to be masked out. The value is still 16 bit
  23 * in width.
  24 *
  25 * This program is free software; you can redistribute it and/or modify
  26 * it under the terms of the GNU General Public License as published by
  27 * the Free Software Foundation; either version 2 of the License, or
  28 * (at your option) any later version.
  29 *
  30 * This program is distributed in the hope that it will be useful,
  31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  33 * GNU General Public License for more details.
  34 *
  35 * You should have received a copy of the GNU General Public License
  36 * along with this program; if not, write to the Free Software
  37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  38 */
  39
  40#include <linux/module.h>
  41#include <linux/init.h>
  42#include <linux/slab.h>
  43#include <linux/jiffies.h>
  44#include <linux/i2c.h>
  45#include <linux/hwmon-sysfs.h>
  46#include <linux/hwmon.h>
  47#include <linux/err.h>
  48#include <linux/mutex.h>
  49#include <linux/sysfs.h>
  50#include <linux/types.h>
  51
  52/*
  53 * Addresses to scan
  54 * Address is fully defined internally and cannot be changed except for
  55 * LM64 which has one pin dedicated to address selection.
  56 * LM63 and LM96163 have address 0x4c.
  57 * LM64 can have address 0x18 or 0x4e.
  58 */
  59
  60static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
  61
  62/*
  63 * The LM63 registers
  64 */
  65
  66#define LM63_REG_CONFIG1                0x03
  67#define LM63_REG_CONVRATE               0x04
  68#define LM63_REG_CONFIG2                0xBF
  69#define LM63_REG_CONFIG_FAN             0x4A
  70
  71#define LM63_REG_TACH_COUNT_MSB         0x47
  72#define LM63_REG_TACH_COUNT_LSB         0x46
  73#define LM63_REG_TACH_LIMIT_MSB         0x49
  74#define LM63_REG_TACH_LIMIT_LSB         0x48
  75
  76#define LM63_REG_PWM_VALUE              0x4C
  77#define LM63_REG_PWM_FREQ               0x4D
  78#define LM63_REG_LUT_TEMP_HYST          0x4F
  79#define LM63_REG_LUT_TEMP(nr)           (0x50 + 2 * (nr))
  80#define LM63_REG_LUT_PWM(nr)            (0x51 + 2 * (nr))
  81
  82#define LM63_REG_LOCAL_TEMP             0x00
  83#define LM63_REG_LOCAL_HIGH             0x05
  84
  85#define LM63_REG_REMOTE_TEMP_MSB        0x01
  86#define LM63_REG_REMOTE_TEMP_LSB        0x10
  87#define LM63_REG_REMOTE_OFFSET_MSB      0x11
  88#define LM63_REG_REMOTE_OFFSET_LSB      0x12
  89#define LM63_REG_REMOTE_HIGH_MSB        0x07
  90#define LM63_REG_REMOTE_HIGH_LSB        0x13
  91#define LM63_REG_REMOTE_LOW_MSB         0x08
  92#define LM63_REG_REMOTE_LOW_LSB         0x14
  93#define LM63_REG_REMOTE_TCRIT           0x19
  94#define LM63_REG_REMOTE_TCRIT_HYST      0x21
  95
  96#define LM63_REG_ALERT_STATUS           0x02
  97#define LM63_REG_ALERT_MASK             0x16
  98
  99#define LM63_REG_MAN_ID                 0xFE
 100#define LM63_REG_CHIP_ID                0xFF
 101
 102#define LM96163_REG_TRUTHERM            0x30
 103#define LM96163_REG_REMOTE_TEMP_U_MSB   0x31
 104#define LM96163_REG_REMOTE_TEMP_U_LSB   0x32
 105#define LM96163_REG_CONFIG_ENHANCED     0x45
 106
 107#define LM63_MAX_CONVRATE               9
 108
 109#define LM63_MAX_CONVRATE_HZ            32
 110#define LM96163_MAX_CONVRATE_HZ         26
 111
 112/*
 113 * Conversions and various macros
 114 * For tachometer counts, the LM63 uses 16-bit values.
 115 * For local temperature and high limit, remote critical limit and hysteresis
 116 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
 117 * For remote temperature, low and high limits, it uses signed 11-bit values
 118 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
 119 * For LM64 the actual remote diode temperature is 16 degree Celsius higher
 120 * than the register reading. Remote temperature setpoints have to be
 121 * adapted accordingly.
 122 */
 123
 124#define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
 125                                 5400000 / (reg))
 126#define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \
 127                                 (5400000 / (val)) & 0xFFFC)
 128#define TEMP8_FROM_REG(reg)     ((reg) * 1000)
 129#define TEMP8_TO_REG(val)       ((val) <= -128000 ? -128 : \
 130                                 (val) >= 127000 ? 127 : \
 131                                 (val) < 0 ? ((val) - 500) / 1000 : \
 132                                 ((val) + 500) / 1000)
 133#define TEMP8U_TO_REG(val)      ((val) <= 0 ? 0 : \
 134                                 (val) >= 255000 ? 255 : \
 135                                 ((val) + 500) / 1000)
 136#define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 137#define TEMP11_TO_REG(val)      ((val) <= -128000 ? 0x8000 : \
 138                                 (val) >= 127875 ? 0x7FE0 : \
 139                                 (val) < 0 ? ((val) - 62) / 125 * 32 : \
 140                                 ((val) + 62) / 125 * 32)
 141#define TEMP11U_TO_REG(val)     ((val) <= 0 ? 0 : \
 142                                 (val) >= 255875 ? 0xFFE0 : \
 143                                 ((val) + 62) / 125 * 32)
 144#define HYST_TO_REG(val)        ((val) <= 0 ? 0 : \
 145                                 (val) >= 127000 ? 127 : \
 146                                 ((val) + 500) / 1000)
 147
 148#define UPDATE_INTERVAL(max, rate) \
 149                        ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max))
 150
 151enum chips { lm63, lm64, lm96163 };
 152
 153/*
 154 * Client data (each client gets its own)
 155 */
 156
 157struct lm63_data {
 158        struct device *hwmon_dev;
 159        struct mutex update_lock;
 160        char valid; /* zero until following fields are valid */
 161        char lut_valid; /* zero until lut fields are valid */
 162        unsigned long last_updated; /* in jiffies */
 163        unsigned long lut_last_updated; /* in jiffies */
 164        enum chips kind;
 165        int temp2_offset;
 166
 167        int update_interval;    /* in milliseconds */
 168        int max_convrate_hz;
 169        int lut_size;           /* 8 or 12 */
 170
 171        /* registers values */
 172        u8 config, config_fan;
 173        u16 fan[2];     /* 0: input
 174                           1: low limit */
 175        u8 pwm1_freq;
 176        u8 pwm1[13];    /* 0: current output
 177                           1-12: lookup table */
 178        s8 temp8[15];   /* 0: local input
 179                           1: local high limit
 180                           2: remote critical limit
 181                           3-14: lookup table */
 182        s16 temp11[4];  /* 0: remote input
 183                           1: remote low limit
 184                           2: remote high limit
 185                           3: remote offset */
 186        u16 temp11u;    /* remote input (unsigned) */
 187        u8 temp2_crit_hyst;
 188        u8 lut_temp_hyst;
 189        u8 alarms;
 190        bool pwm_highres;
 191        bool lut_temp_highres;
 192        bool remote_unsigned; /* true if unsigned remote upper limits */
 193        bool trutherm;
 194};
 195
 196static inline int temp8_from_reg(struct lm63_data *data, int nr)
 197{
 198        if (data->remote_unsigned)
 199                return TEMP8_FROM_REG((u8)data->temp8[nr]);
 200        return TEMP8_FROM_REG(data->temp8[nr]);
 201}
 202
 203static inline int lut_temp_from_reg(struct lm63_data *data, int nr)
 204{
 205        return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000);
 206}
 207
 208static inline int lut_temp_to_reg(struct lm63_data *data, long val)
 209{
 210        val -= data->temp2_offset;
 211        if (data->lut_temp_highres)
 212                return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500);
 213        else
 214                return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000);
 215}
 216
 217/*
 218 * Update the lookup table register cache.
 219 * client->update_lock must be held when calling this function.
 220 */
 221static void lm63_update_lut(struct i2c_client *client)
 222{
 223        struct lm63_data *data = i2c_get_clientdata(client);
 224        int i;
 225
 226        if (time_after(jiffies, data->lut_last_updated + 5 * HZ) ||
 227            !data->lut_valid) {
 228                for (i = 0; i < data->lut_size; i++) {
 229                        data->pwm1[1 + i] = i2c_smbus_read_byte_data(client,
 230                                            LM63_REG_LUT_PWM(i));
 231                        data->temp8[3 + i] = i2c_smbus_read_byte_data(client,
 232                                             LM63_REG_LUT_TEMP(i));
 233                }
 234                data->lut_temp_hyst = i2c_smbus_read_byte_data(client,
 235                                      LM63_REG_LUT_TEMP_HYST);
 236
 237                data->lut_last_updated = jiffies;
 238                data->lut_valid = 1;
 239        }
 240}
 241
 242static struct lm63_data *lm63_update_device(struct device *dev)
 243{
 244        struct i2c_client *client = to_i2c_client(dev);
 245        struct lm63_data *data = i2c_get_clientdata(client);
 246        unsigned long next_update;
 247
 248        mutex_lock(&data->update_lock);
 249
 250        next_update = data->last_updated +
 251                      msecs_to_jiffies(data->update_interval);
 252        if (time_after(jiffies, next_update) || !data->valid) {
 253                if (data->config & 0x04) { /* tachometer enabled  */
 254                        /* order matters for fan1_input */
 255                        data->fan[0] = i2c_smbus_read_byte_data(client,
 256                                       LM63_REG_TACH_COUNT_LSB) & 0xFC;
 257                        data->fan[0] |= i2c_smbus_read_byte_data(client,
 258                                        LM63_REG_TACH_COUNT_MSB) << 8;
 259                        data->fan[1] = (i2c_smbus_read_byte_data(client,
 260                                        LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 261                                     | (i2c_smbus_read_byte_data(client,
 262                                        LM63_REG_TACH_LIMIT_MSB) << 8);
 263                }
 264
 265                data->pwm1_freq = i2c_smbus_read_byte_data(client,
 266                                  LM63_REG_PWM_FREQ);
 267                if (data->pwm1_freq == 0)
 268                        data->pwm1_freq = 1;
 269                data->pwm1[0] = i2c_smbus_read_byte_data(client,
 270                                LM63_REG_PWM_VALUE);
 271
 272                data->temp8[0] = i2c_smbus_read_byte_data(client,
 273                                 LM63_REG_LOCAL_TEMP);
 274                data->temp8[1] = i2c_smbus_read_byte_data(client,
 275                                 LM63_REG_LOCAL_HIGH);
 276
 277                /* order matters for temp2_input */
 278                data->temp11[0] = i2c_smbus_read_byte_data(client,
 279                                  LM63_REG_REMOTE_TEMP_MSB) << 8;
 280                data->temp11[0] |= i2c_smbus_read_byte_data(client,
 281                                   LM63_REG_REMOTE_TEMP_LSB);
 282                data->temp11[1] = (i2c_smbus_read_byte_data(client,
 283                                  LM63_REG_REMOTE_LOW_MSB) << 8)
 284                                | i2c_smbus_read_byte_data(client,
 285                                  LM63_REG_REMOTE_LOW_LSB);
 286                data->temp11[2] = (i2c_smbus_read_byte_data(client,
 287                                  LM63_REG_REMOTE_HIGH_MSB) << 8)
 288                                | i2c_smbus_read_byte_data(client,
 289                                  LM63_REG_REMOTE_HIGH_LSB);
 290                data->temp11[3] = (i2c_smbus_read_byte_data(client,
 291                                  LM63_REG_REMOTE_OFFSET_MSB) << 8)
 292                                | i2c_smbus_read_byte_data(client,
 293                                  LM63_REG_REMOTE_OFFSET_LSB);
 294
 295                if (data->kind == lm96163)
 296                        data->temp11u = (i2c_smbus_read_byte_data(client,
 297                                        LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
 298                                      | i2c_smbus_read_byte_data(client,
 299                                        LM96163_REG_REMOTE_TEMP_U_LSB);
 300
 301                data->temp8[2] = i2c_smbus_read_byte_data(client,
 302                                 LM63_REG_REMOTE_TCRIT);
 303                data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 304                                        LM63_REG_REMOTE_TCRIT_HYST);
 305
 306                data->alarms = i2c_smbus_read_byte_data(client,
 307                               LM63_REG_ALERT_STATUS) & 0x7F;
 308
 309                data->last_updated = jiffies;
 310                data->valid = 1;
 311        }
 312
 313        lm63_update_lut(client);
 314
 315        mutex_unlock(&data->update_lock);
 316
 317        return data;
 318}
 319
 320/*
 321 * Trip points in the lookup table should be in ascending order for both
 322 * temperatures and PWM output values.
 323 */
 324static int lm63_lut_looks_bad(struct i2c_client *client)
 325{
 326        struct lm63_data *data = i2c_get_clientdata(client);
 327        int i;
 328
 329        mutex_lock(&data->update_lock);
 330        lm63_update_lut(client);
 331
 332        for (i = 1; i < data->lut_size; i++) {
 333                if (data->pwm1[1 + i - 1] > data->pwm1[1 + i]
 334                 || data->temp8[3 + i - 1] > data->temp8[3 + i]) {
 335                        dev_warn(&client->dev,
 336                                 "Lookup table doesn't look sane (check entries %d and %d)\n",
 337                                 i, i + 1);
 338                        break;
 339                }
 340        }
 341        mutex_unlock(&data->update_lock);
 342
 343        return i == data->lut_size ? 0 : 1;
 344}
 345
 346/*
 347 * Sysfs callback functions and files
 348 */
 349
 350static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 351                        char *buf)
 352{
 353        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 354        struct lm63_data *data = lm63_update_device(dev);
 355        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 356}
 357
 358static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 359                       const char *buf, size_t count)
 360{
 361        struct i2c_client *client = to_i2c_client(dev);
 362        struct lm63_data *data = i2c_get_clientdata(client);
 363        unsigned long val;
 364        int err;
 365
 366        err = kstrtoul(buf, 10, &val);
 367        if (err)
 368                return err;
 369
 370        mutex_lock(&data->update_lock);
 371        data->fan[1] = FAN_TO_REG(val);
 372        i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 373                                  data->fan[1] & 0xFF);
 374        i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 375                                  data->fan[1] >> 8);
 376        mutex_unlock(&data->update_lock);
 377        return count;
 378}
 379
 380static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
 381                         char *buf)
 382{
 383        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 384        struct lm63_data *data = lm63_update_device(dev);
 385        int nr = attr->index;
 386        int pwm;
 387
 388        if (data->pwm_highres)
 389                pwm = data->pwm1[nr];
 390        else
 391                pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
 392                       255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
 393                       (2 * data->pwm1_freq);
 394
 395        return sprintf(buf, "%d\n", pwm);
 396}
 397
 398static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
 399                        const char *buf, size_t count)
 400{
 401        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 402        struct i2c_client *client = to_i2c_client(dev);
 403        struct lm63_data *data = i2c_get_clientdata(client);
 404        int nr = attr->index;
 405        unsigned long val;
 406        int err;
 407        u8 reg;
 408
 409        if (!(data->config_fan & 0x20)) /* register is read-only */
 410                return -EPERM;
 411
 412        err = kstrtoul(buf, 10, &val);
 413        if (err)
 414                return err;
 415
 416        reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
 417        val = clamp_val(val, 0, 255);
 418
 419        mutex_lock(&data->update_lock);
 420        data->pwm1[nr] = data->pwm_highres ? val :
 421                        (val * data->pwm1_freq * 2 + 127) / 255;
 422        i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
 423        mutex_unlock(&data->update_lock);
 424        return count;
 425}
 426
 427static ssize_t show_pwm1_enable(struct device *dev,
 428                                struct device_attribute *dummy, char *buf)
 429{
 430        struct lm63_data *data = lm63_update_device(dev);
 431        return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 432}
 433
 434static ssize_t set_pwm1_enable(struct device *dev,
 435                               struct device_attribute *dummy,
 436                               const char *buf, size_t count)
 437{
 438        struct i2c_client *client = to_i2c_client(dev);
 439        struct lm63_data *data = i2c_get_clientdata(client);
 440        unsigned long val;
 441        int err;
 442
 443        err = kstrtoul(buf, 10, &val);
 444        if (err)
 445                return err;
 446        if (val < 1 || val > 2)
 447                return -EINVAL;
 448
 449        /*
 450         * Only let the user switch to automatic mode if the lookup table
 451         * looks sane.
 452         */
 453        if (val == 2 && lm63_lut_looks_bad(client))
 454                return -EPERM;
 455
 456        mutex_lock(&data->update_lock);
 457        data->config_fan = i2c_smbus_read_byte_data(client,
 458                                                    LM63_REG_CONFIG_FAN);
 459        if (val == 1)
 460                data->config_fan |= 0x20;
 461        else
 462                data->config_fan &= ~0x20;
 463        i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
 464        data->config_fan);
 465        mutex_unlock(&data->update_lock);
 466        return count;
 467}
 468
 469/*
 470 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
 471 * For remote sensor registers temp2_offset has to be considered,
 472 * for local sensor it must not.
 473 * So we need separate 8bit accessors for local and remote sensor.
 474 */
 475static ssize_t show_local_temp8(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", TEMP8_FROM_REG(data->temp8[attr->index]));
 482}
 483
 484static ssize_t show_remote_temp8(struct device *dev,
 485                                 struct device_attribute *devattr,
 486                                 char *buf)
 487{
 488        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 489        struct lm63_data *data = lm63_update_device(dev);
 490        return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
 491                       + data->temp2_offset);
 492}
 493
 494static ssize_t show_lut_temp(struct device *dev,
 495                              struct device_attribute *devattr,
 496                              char *buf)
 497{
 498        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 499        struct lm63_data *data = lm63_update_device(dev);
 500        return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
 501                       + data->temp2_offset);
 502}
 503
 504static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
 505                         const char *buf, size_t count)
 506{
 507        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 508        struct i2c_client *client = to_i2c_client(dev);
 509        struct lm63_data *data = i2c_get_clientdata(client);
 510        int nr = attr->index;
 511        long val;
 512        int err;
 513        int temp;
 514        u8 reg;
 515
 516        err = kstrtol(buf, 10, &val);
 517        if (err)
 518                return err;
 519
 520        mutex_lock(&data->update_lock);
 521        switch (nr) {
 522        case 2:
 523                reg = LM63_REG_REMOTE_TCRIT;
 524                if (data->remote_unsigned)
 525                        temp = TEMP8U_TO_REG(val - data->temp2_offset);
 526                else
 527                        temp = TEMP8_TO_REG(val - data->temp2_offset);
 528                break;
 529        case 1:
 530                reg = LM63_REG_LOCAL_HIGH;
 531                temp = TEMP8_TO_REG(val);
 532                break;
 533        default:        /* lookup table */
 534                reg = LM63_REG_LUT_TEMP(nr - 3);
 535                temp = lut_temp_to_reg(data, val);
 536        }
 537        data->temp8[nr] = temp;
 538        i2c_smbus_write_byte_data(client, reg, temp);
 539        mutex_unlock(&data->update_lock);
 540        return count;
 541}
 542
 543static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 544                           char *buf)
 545{
 546        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 547        struct lm63_data *data = lm63_update_device(dev);
 548        int nr = attr->index;
 549        int temp;
 550
 551        if (!nr) {
 552                /*
 553                 * Use unsigned temperature unless its value is zero.
 554                 * If it is zero, use signed temperature.
 555                 */
 556                if (data->temp11u)
 557                        temp = TEMP11_FROM_REG(data->temp11u);
 558                else
 559                        temp = TEMP11_FROM_REG(data->temp11[nr]);
 560        } else {
 561                if (data->remote_unsigned && nr == 2)
 562                        temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
 563                else
 564                        temp = TEMP11_FROM_REG(data->temp11[nr]);
 565        }
 566        return sprintf(buf, "%d\n", temp + data->temp2_offset);
 567}
 568
 569static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 570                          const char *buf, size_t count)
 571{
 572        static const u8 reg[6] = {
 573                LM63_REG_REMOTE_LOW_MSB,
 574                LM63_REG_REMOTE_LOW_LSB,
 575                LM63_REG_REMOTE_HIGH_MSB,
 576                LM63_REG_REMOTE_HIGH_LSB,
 577                LM63_REG_REMOTE_OFFSET_MSB,
 578                LM63_REG_REMOTE_OFFSET_LSB,
 579        };
 580
 581        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 582        struct i2c_client *client = to_i2c_client(dev);
 583        struct lm63_data *data = i2c_get_clientdata(client);
 584        long val;
 585        int err;
 586        int nr = attr->index;
 587
 588        err = kstrtol(buf, 10, &val);
 589        if (err)
 590                return err;
 591
 592        mutex_lock(&data->update_lock);
 593        if (data->remote_unsigned && nr == 2)
 594                data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
 595        else
 596                data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
 597
 598        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 599                                  data->temp11[nr] >> 8);
 600        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 601                                  data->temp11[nr] & 0xff);
 602        mutex_unlock(&data->update_lock);
 603        return count;
 604}
 605
 606/*
 607 * Hysteresis register holds a relative value, while we want to present
 608 * an absolute to user-space
 609 */
 610static ssize_t show_temp2_crit_hyst(struct device *dev,
 611                                    struct device_attribute *dummy, char *buf)
 612{
 613        struct lm63_data *data = lm63_update_device(dev);
 614        return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
 615                       + data->temp2_offset
 616                       - TEMP8_FROM_REG(data->temp2_crit_hyst));
 617}
 618
 619static ssize_t show_lut_temp_hyst(struct device *dev,
 620                                  struct device_attribute *devattr, char *buf)
 621{
 622        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 623        struct lm63_data *data = lm63_update_device(dev);
 624
 625        return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
 626                       + data->temp2_offset
 627                       - TEMP8_FROM_REG(data->lut_temp_hyst));
 628}
 629
 630/*
 631 * And now the other way around, user-space provides an absolute
 632 * hysteresis value and we have to store a relative one
 633 */
 634static ssize_t set_temp2_crit_hyst(struct device *dev,
 635                                   struct device_attribute *dummy,
 636                                   const char *buf, size_t count)
 637{
 638        struct i2c_client *client = to_i2c_client(dev);
 639        struct lm63_data *data = i2c_get_clientdata(client);
 640        long val;
 641        int err;
 642        long hyst;
 643
 644        err = kstrtol(buf, 10, &val);
 645        if (err)
 646                return err;
 647
 648        mutex_lock(&data->update_lock);
 649        hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
 650        i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 651                                  HYST_TO_REG(hyst));
 652        mutex_unlock(&data->update_lock);
 653        return count;
 654}
 655
 656/*
 657 * Set conversion rate.
 658 * client->update_lock must be held when calling this function.
 659 */
 660static void lm63_set_convrate(struct i2c_client *client, struct lm63_data *data,
 661                              unsigned int interval)
 662{
 663        int i;
 664        unsigned int update_interval;
 665
 666        /* Shift calculations to avoid rounding errors */
 667        interval <<= 6;
 668
 669        /* find the nearest update rate */
 670        update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
 671          / data->max_convrate_hz;
 672        for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
 673                if (interval >= update_interval * 3 / 4)
 674                        break;
 675
 676        i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
 677        data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
 678}
 679
 680static ssize_t show_update_interval(struct device *dev,
 681                                    struct device_attribute *attr, char *buf)
 682{
 683        struct lm63_data *data = dev_get_drvdata(dev);
 684
 685        return sprintf(buf, "%u\n", data->update_interval);
 686}
 687
 688static ssize_t set_update_interval(struct device *dev,
 689                                   struct device_attribute *attr,
 690                                   const char *buf, size_t count)
 691{
 692        struct i2c_client *client = to_i2c_client(dev);
 693        struct lm63_data *data = i2c_get_clientdata(client);
 694        unsigned long val;
 695        int err;
 696
 697        err = kstrtoul(buf, 10, &val);
 698        if (err)
 699                return err;
 700
 701        mutex_lock(&data->update_lock);
 702        lm63_set_convrate(client, data, clamp_val(val, 0, 100000));
 703        mutex_unlock(&data->update_lock);
 704
 705        return count;
 706}
 707
 708static ssize_t show_type(struct device *dev, struct device_attribute *attr,
 709                         char *buf)
 710{
 711        struct i2c_client *client = to_i2c_client(dev);
 712        struct lm63_data *data = i2c_get_clientdata(client);
 713
 714        return sprintf(buf, data->trutherm ? "1\n" : "2\n");
 715}
 716
 717static ssize_t set_type(struct device *dev, struct device_attribute *attr,
 718                        const char *buf, size_t count)
 719{
 720        struct i2c_client *client = to_i2c_client(dev);
 721        struct lm63_data *data = i2c_get_clientdata(client);
 722        unsigned long val;
 723        int ret;
 724        u8 reg;
 725
 726        ret = kstrtoul(buf, 10, &val);
 727        if (ret < 0)
 728                return ret;
 729        if (val != 1 && val != 2)
 730                return -EINVAL;
 731
 732        mutex_lock(&data->update_lock);
 733        data->trutherm = val == 1;
 734        reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
 735        i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
 736                                  reg | (data->trutherm ? 0x02 : 0x00));
 737        data->valid = 0;
 738        mutex_unlock(&data->update_lock);
 739
 740        return count;
 741}
 742
 743static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 744                           char *buf)
 745{
 746        struct lm63_data *data = lm63_update_device(dev);
 747        return sprintf(buf, "%u\n", data->alarms);
 748}
 749
 750static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 751                          char *buf)
 752{
 753        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 754        struct lm63_data *data = lm63_update_device(dev);
 755        int bitnr = attr->index;
 756
 757        return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 758}
 759
 760static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 761static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 762        set_fan, 1);
 763
 764static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
 765static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
 766        show_pwm1_enable, set_pwm1_enable);
 767static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
 768        show_pwm1, set_pwm1, 1);
 769static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
 770        show_lut_temp, set_temp8, 3);
 771static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
 772        show_lut_temp_hyst, NULL, 3);
 773static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
 774        show_pwm1, set_pwm1, 2);
 775static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
 776        show_lut_temp, set_temp8, 4);
 777static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
 778        show_lut_temp_hyst, NULL, 4);
 779static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
 780        show_pwm1, set_pwm1, 3);
 781static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
 782        show_lut_temp, set_temp8, 5);
 783static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
 784        show_lut_temp_hyst, NULL, 5);
 785static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
 786        show_pwm1, set_pwm1, 4);
 787static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
 788        show_lut_temp, set_temp8, 6);
 789static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
 790        show_lut_temp_hyst, NULL, 6);
 791static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
 792        show_pwm1, set_pwm1, 5);
 793static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
 794        show_lut_temp, set_temp8, 7);
 795static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
 796        show_lut_temp_hyst, NULL, 7);
 797static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
 798        show_pwm1, set_pwm1, 6);
 799static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
 800        show_lut_temp, set_temp8, 8);
 801static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
 802        show_lut_temp_hyst, NULL, 8);
 803static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
 804        show_pwm1, set_pwm1, 7);
 805static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
 806        show_lut_temp, set_temp8, 9);
 807static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
 808        show_lut_temp_hyst, NULL, 9);
 809static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
 810        show_pwm1, set_pwm1, 8);
 811static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
 812        show_lut_temp, set_temp8, 10);
 813static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
 814        show_lut_temp_hyst, NULL, 10);
 815static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
 816        show_pwm1, set_pwm1, 9);
 817static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
 818        show_lut_temp, set_temp8, 11);
 819static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
 820        show_lut_temp_hyst, NULL, 11);
 821static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
 822        show_pwm1, set_pwm1, 10);
 823static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
 824        show_lut_temp, set_temp8, 12);
 825static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
 826        show_lut_temp_hyst, NULL, 12);
 827static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
 828        show_pwm1, set_pwm1, 11);
 829static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
 830        show_lut_temp, set_temp8, 13);
 831static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
 832        show_lut_temp_hyst, NULL, 13);
 833static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
 834        show_pwm1, set_pwm1, 12);
 835static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
 836        show_lut_temp, set_temp8, 14);
 837static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
 838        show_lut_temp_hyst, NULL, 14);
 839
 840static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
 841static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
 842        set_temp8, 1);
 843
 844static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 845static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 846        set_temp11, 1);
 847static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 848        set_temp11, 2);
 849static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
 850        set_temp11, 3);
 851static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
 852        set_temp8, 2);
 853static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 854        set_temp2_crit_hyst);
 855
 856static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type);
 857
 858/* Individual alarm files */
 859static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 860static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 861static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 862static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 863static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 864static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 865/* Raw alarm file for compatibility */
 866static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 867
 868static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
 869                   set_update_interval);
 870
 871static struct attribute *lm63_attributes[] = {
 872        &sensor_dev_attr_pwm1.dev_attr.attr,
 873        &dev_attr_pwm1_enable.attr,
 874        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
 875        &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
 876        &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
 877        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
 878        &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
 879        &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
 880        &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
 881        &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
 882        &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
 883        &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
 884        &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
 885        &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
 886        &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
 887        &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
 888        &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
 889        &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
 890        &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
 891        &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
 892        &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
 893        &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
 894        &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
 895        &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
 896        &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
 897        &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
 898
 899        &sensor_dev_attr_temp1_input.dev_attr.attr,
 900        &sensor_dev_attr_temp2_input.dev_attr.attr,
 901        &sensor_dev_attr_temp2_min.dev_attr.attr,
 902        &sensor_dev_attr_temp1_max.dev_attr.attr,
 903        &sensor_dev_attr_temp2_max.dev_attr.attr,
 904        &sensor_dev_attr_temp2_offset.dev_attr.attr,
 905        &sensor_dev_attr_temp2_crit.dev_attr.attr,
 906        &dev_attr_temp2_crit_hyst.attr,
 907
 908        &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 909        &sensor_dev_attr_temp2_fault.dev_attr.attr,
 910        &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 911        &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 912        &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 913        &dev_attr_alarms.attr,
 914        &dev_attr_update_interval.attr,
 915        NULL
 916};
 917
 918static struct attribute *lm63_attributes_extra_lut[] = {
 919        &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr,
 920        &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr,
 921        &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr,
 922        &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr,
 923        &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr,
 924        &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr,
 925        &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr,
 926        &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr,
 927        &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr,
 928        &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr,
 929        &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr,
 930        &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr,
 931        NULL
 932};
 933
 934static const struct attribute_group lm63_group_extra_lut = {
 935        .attrs = lm63_attributes_extra_lut,
 936};
 937
 938/*
 939 * On LM63, temp2_crit can be set only once, which should be job
 940 * of the bootloader.
 941 * On LM64, temp2_crit can always be set.
 942 * On LM96163, temp2_crit can be set if bit 1 of the configuration
 943 * register is true.
 944 */
 945static umode_t lm63_attribute_mode(struct kobject *kobj,
 946                                   struct attribute *attr, int index)
 947{
 948        struct device *dev = container_of(kobj, struct device, kobj);
 949        struct i2c_client *client = to_i2c_client(dev);
 950        struct lm63_data *data = i2c_get_clientdata(client);
 951
 952        if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
 953            && (data->kind == lm64 ||
 954                (data->kind == lm96163 && (data->config & 0x02))))
 955                return attr->mode | S_IWUSR;
 956
 957        return attr->mode;
 958}
 959
 960static const struct attribute_group lm63_group = {
 961        .is_visible = lm63_attribute_mode,
 962        .attrs = lm63_attributes,
 963};
 964
 965static struct attribute *lm63_attributes_fan1[] = {
 966        &sensor_dev_attr_fan1_input.dev_attr.attr,
 967        &sensor_dev_attr_fan1_min.dev_attr.attr,
 968
 969        &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 970        NULL
 971};
 972
 973static const struct attribute_group lm63_group_fan1 = {
 974        .attrs = lm63_attributes_fan1,
 975};
 976
 977/*
 978 * Real code
 979 */
 980
 981/* Return 0 if detection is successful, -ENODEV otherwise */
 982static int lm63_detect(struct i2c_client *client,
 983                       struct i2c_board_info *info)
 984{
 985        struct i2c_adapter *adapter = client->adapter;
 986        u8 man_id, chip_id, reg_config1, reg_config2;
 987        u8 reg_alert_status, reg_alert_mask;
 988        int address = client->addr;
 989
 990        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 991                return -ENODEV;
 992
 993        man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
 994        chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
 995
 996        reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 997        reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
 998        reg_alert_status = i2c_smbus_read_byte_data(client,
 999                           LM63_REG_ALERT_STATUS);
1000        reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
1001
1002        if (man_id != 0x01 /* National Semiconductor */
1003         || (reg_config1 & 0x18) != 0x00
1004         || (reg_config2 & 0xF8) != 0x00
1005         || (reg_alert_status & 0x20) != 0x00
1006         || (reg_alert_mask & 0xA4) != 0xA4) {
1007                dev_dbg(&adapter->dev,
1008                        "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
1009                        man_id, chip_id);
1010                return -ENODEV;
1011        }
1012
1013        if (chip_id == 0x41 && address == 0x4c)
1014                strlcpy(info->type, "lm63", I2C_NAME_SIZE);
1015        else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
1016                strlcpy(info->type, "lm64", I2C_NAME_SIZE);
1017        else if (chip_id == 0x49 && address == 0x4c)
1018                strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
1019        else
1020                return -ENODEV;
1021
1022        return 0;
1023}
1024
1025/*
1026 * Ideally we shouldn't have to initialize anything, since the BIOS
1027 * should have taken care of everything
1028 */
1029static void lm63_init_client(struct i2c_client *client)
1030{
1031        struct lm63_data *data = i2c_get_clientdata(client);
1032        u8 convrate;
1033
1034        data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1035        data->config_fan = i2c_smbus_read_byte_data(client,
1036                                                    LM63_REG_CONFIG_FAN);
1037
1038        /* Start converting if needed */
1039        if (data->config & 0x40) { /* standby */
1040                dev_dbg(&client->dev, "Switching to operational mode\n");
1041                data->config &= 0xA7;
1042                i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
1043                                          data->config);
1044        }
1045        /* Tachometer is always enabled on LM64 */
1046        if (data->kind == lm64)
1047                data->config |= 0x04;
1048
1049        /* We may need pwm1_freq before ever updating the client data */
1050        data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
1051        if (data->pwm1_freq == 0)
1052                data->pwm1_freq = 1;
1053
1054        switch (data->kind) {
1055        case lm63:
1056        case lm64:
1057                data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
1058                data->lut_size = 8;
1059                break;
1060        case lm96163:
1061                data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
1062                data->lut_size = 12;
1063                data->trutherm
1064                  = i2c_smbus_read_byte_data(client,
1065                                             LM96163_REG_TRUTHERM) & 0x02;
1066                break;
1067        }
1068        convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
1069        if (unlikely(convrate > LM63_MAX_CONVRATE))
1070                convrate = LM63_MAX_CONVRATE;
1071        data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
1072                                                convrate);
1073
1074        /*
1075         * For LM96163, check if high resolution PWM
1076         * and unsigned temperature format is enabled.
1077         */
1078        if (data->kind == lm96163) {
1079                u8 config_enhanced
1080                  = i2c_smbus_read_byte_data(client,
1081                                             LM96163_REG_CONFIG_ENHANCED);
1082                if (config_enhanced & 0x20)
1083                        data->lut_temp_highres = true;
1084                if ((config_enhanced & 0x10)
1085                    && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
1086                        data->pwm_highres = true;
1087                if (config_enhanced & 0x08)
1088                        data->remote_unsigned = true;
1089        }
1090
1091        /* Show some debug info about the LM63 configuration */
1092        if (data->kind == lm63)
1093                dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
1094                        (data->config & 0x04) ? "tachometer input" :
1095                        "alert output");
1096        dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
1097                (data->config_fan & 0x08) ? "1.4" : "360",
1098                ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
1099        dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
1100                (data->config_fan & 0x10) ? "low" : "high",
1101                (data->config_fan & 0x20) ? "manual" : "auto");
1102}
1103
1104static int lm63_probe(struct i2c_client *client,
1105                      const struct i2c_device_id *id)
1106{
1107        struct lm63_data *data;
1108        int err;
1109
1110        data = devm_kzalloc(&client->dev, sizeof(struct lm63_data), GFP_KERNEL);
1111        if (!data)
1112                return -ENOMEM;
1113
1114        i2c_set_clientdata(client, data);
1115        data->valid = 0;
1116        mutex_init(&data->update_lock);
1117
1118        /* Set the device type */
1119        data->kind = id->driver_data;
1120        if (data->kind == lm64)
1121                data->temp2_offset = 16000;
1122
1123        /* Initialize chip */
1124        lm63_init_client(client);
1125
1126        /* Register sysfs hooks */
1127        err = sysfs_create_group(&client->dev.kobj, &lm63_group);
1128        if (err)
1129                return err;
1130        if (data->config & 0x04) { /* tachometer enabled */
1131                err = sysfs_create_group(&client->dev.kobj, &lm63_group_fan1);
1132                if (err)
1133                        goto exit_remove_files;
1134        }
1135        if (data->kind == lm96163) {
1136                err = device_create_file(&client->dev, &dev_attr_temp2_type);
1137                if (err)
1138                        goto exit_remove_files;
1139
1140                err = sysfs_create_group(&client->dev.kobj,
1141                                         &lm63_group_extra_lut);
1142                if (err)
1143                        goto exit_remove_files;
1144        }
1145
1146        data->hwmon_dev = hwmon_device_register(&client->dev);
1147        if (IS_ERR(data->hwmon_dev)) {
1148                err = PTR_ERR(data->hwmon_dev);
1149                goto exit_remove_files;
1150        }
1151
1152        return 0;
1153
1154exit_remove_files:
1155        sysfs_remove_group(&client->dev.kobj, &lm63_group);
1156        sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
1157        if (data->kind == lm96163) {
1158                device_remove_file(&client->dev, &dev_attr_temp2_type);
1159                sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut);
1160        }
1161        return err;
1162}
1163
1164static int lm63_remove(struct i2c_client *client)
1165{
1166        struct lm63_data *data = i2c_get_clientdata(client);
1167
1168        hwmon_device_unregister(data->hwmon_dev);
1169        sysfs_remove_group(&client->dev.kobj, &lm63_group);
1170        sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
1171        if (data->kind == lm96163) {
1172                device_remove_file(&client->dev, &dev_attr_temp2_type);
1173                sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut);
1174        }
1175
1176        return 0;
1177}
1178
1179/*
1180 * Driver data (common to all clients)
1181 */
1182
1183static const struct i2c_device_id lm63_id[] = {
1184        { "lm63", lm63 },
1185        { "lm64", lm64 },
1186        { "lm96163", lm96163 },
1187        { }
1188};
1189MODULE_DEVICE_TABLE(i2c, lm63_id);
1190
1191static struct i2c_driver lm63_driver = {
1192        .class          = I2C_CLASS_HWMON,
1193        .driver = {
1194                .name   = "lm63",
1195        },
1196        .probe          = lm63_probe,
1197        .remove         = lm63_remove,
1198        .id_table       = lm63_id,
1199        .detect         = lm63_detect,
1200        .address_list   = normal_i2c,
1201};
1202
1203module_i2c_driver(lm63_driver);
1204
1205MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1206MODULE_DESCRIPTION("LM63 driver");
1207MODULE_LICENSE("GPL");
1208
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