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(SENSORS_LIMIT(val, 0, 127500), 500);
 213        else
 214                return DIV_ROUND_CLOSEST(SENSORS_LIMIT(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) + 1;
 252
 253        if (time_after(jiffies, next_update) || !data->valid) {
 254                if (data->config & 0x04) { /* tachometer enabled  */
 255                        /* order matters for fan1_input */
 256                        data->fan[0] = i2c_smbus_read_byte_data(client,
 257                                       LM63_REG_TACH_COUNT_LSB) & 0xFC;
 258                        data->fan[0] |= i2c_smbus_read_byte_data(client,
 259                                        LM63_REG_TACH_COUNT_MSB) << 8;
 260                        data->fan[1] = (i2c_smbus_read_byte_data(client,
 261                                        LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 262                                     | (i2c_smbus_read_byte_data(client,
 263                                        LM63_REG_TACH_LIMIT_MSB) << 8);
 264                }
 265
 266                data->pwm1_freq = i2c_smbus_read_byte_data(client,
 267                                  LM63_REG_PWM_FREQ);
 268                if (data->pwm1_freq == 0)
 269                        data->pwm1_freq = 1;
 270                data->pwm1[0] = i2c_smbus_read_byte_data(client,
 271                                LM63_REG_PWM_VALUE);
 272
 273                data->temp8[0] = i2c_smbus_read_byte_data(client,
 274                                 LM63_REG_LOCAL_TEMP);
 275                data->temp8[1] = i2c_smbus_read_byte_data(client,
 276                                 LM63_REG_LOCAL_HIGH);
 277
 278                /* order matters for temp2_input */
 279                data->temp11[0] = i2c_smbus_read_byte_data(client,
 280                                  LM63_REG_REMOTE_TEMP_MSB) << 8;
 281                data->temp11[0] |= i2c_smbus_read_byte_data(client,
 282                                   LM63_REG_REMOTE_TEMP_LSB);
 283                data->temp11[1] = (i2c_smbus_read_byte_data(client,
 284                                  LM63_REG_REMOTE_LOW_MSB) << 8)
 285                                | i2c_smbus_read_byte_data(client,
 286                                  LM63_REG_REMOTE_LOW_LSB);
 287                data->temp11[2] = (i2c_smbus_read_byte_data(client,
 288                                  LM63_REG_REMOTE_HIGH_MSB) << 8)
 289                                | i2c_smbus_read_byte_data(client,
 290                                  LM63_REG_REMOTE_HIGH_LSB);
 291                data->temp11[3] = (i2c_smbus_read_byte_data(client,
 292                                  LM63_REG_REMOTE_OFFSET_MSB) << 8)
 293                                | i2c_smbus_read_byte_data(client,
 294                                  LM63_REG_REMOTE_OFFSET_LSB);
 295
 296                if (data->kind == lm96163)
 297                        data->temp11u = (i2c_smbus_read_byte_data(client,
 298                                        LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
 299                                      | i2c_smbus_read_byte_data(client,
 300                                        LM96163_REG_REMOTE_TEMP_U_LSB);
 301
 302                data->temp8[2] = i2c_smbus_read_byte_data(client,
 303                                 LM63_REG_REMOTE_TCRIT);
 304                data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 305                                        LM63_REG_REMOTE_TCRIT_HYST);
 306
 307                data->alarms = i2c_smbus_read_byte_data(client,
 308                               LM63_REG_ALERT_STATUS) & 0x7F;
 309
 310                data->last_updated = jiffies;
 311                data->valid = 1;
 312        }
 313
 314        lm63_update_lut(client);
 315
 316        mutex_unlock(&data->update_lock);
 317
 318        return data;
 319}
 320
 321/*
 322 * Trip points in the lookup table should be in ascending order for both
 323 * temperatures and PWM output values.
 324 */
 325static int lm63_lut_looks_bad(struct i2c_client *client)
 326{
 327        struct lm63_data *data = i2c_get_clientdata(client);
 328        int i;
 329
 330        mutex_lock(&data->update_lock);
 331        lm63_update_lut(client);
 332
 333        for (i = 1; i < data->lut_size; i++) {
 334                if (data->pwm1[1 + i - 1] > data->pwm1[1 + i]
 335                 || data->temp8[3 + i - 1] > data->temp8[3 + i]) {
 336                        dev_warn(&client->dev,
 337                                 "Lookup table doesn't look sane (check entries %d and %d)\n",
 338                                 i, i + 1);
 339                        break;
 340                }
 341        }
 342        mutex_unlock(&data->update_lock);
 343
 344        return i == data->lut_size ? 0 : 1;
 345}
 346
 347/*
 348 * Sysfs callback functions and files
 349 */
 350
 351static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 352                        char *buf)
 353{
 354        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 355        struct lm63_data *data = lm63_update_device(dev);
 356        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 357}
 358
 359static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 360                       const char *buf, size_t count)
 361{
 362        struct i2c_client *client = to_i2c_client(dev);
 363        struct lm63_data *data = i2c_get_clientdata(client);
 364        unsigned long val;
 365        int err;
 366
 367        err = kstrtoul(buf, 10, &val);
 368        if (err)
 369                return err;
 370
 371        mutex_lock(&data->update_lock);
 372        data->fan[1] = FAN_TO_REG(val);
 373        i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 374                                  data->fan[1] & 0xFF);
 375        i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 376                                  data->fan[1] >> 8);
 377        mutex_unlock(&data->update_lock);
 378        return count;
 379}
 380
 381static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
 382                         char *buf)
 383{
 384        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 385        struct lm63_data *data = lm63_update_device(dev);
 386        int nr = attr->index;
 387        int pwm;
 388
 389        if (data->pwm_highres)
 390                pwm = data->pwm1[nr];
 391        else
 392                pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
 393                       255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
 394                       (2 * data->pwm1_freq);
 395
 396        return sprintf(buf, "%d\n", pwm);
 397}
 398
 399static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
 400                        const char *buf, size_t count)
 401{
 402        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 403        struct i2c_client *client = to_i2c_client(dev);
 404        struct lm63_data *data = i2c_get_clientdata(client);
 405        int nr = attr->index;
 406        unsigned long val;
 407        int err;
 408        u8 reg;
 409
 410        if (!(data->config_fan & 0x20)) /* register is read-only */
 411                return -EPERM;
 412
 413        err = kstrtoul(buf, 10, &val);
 414        if (err)
 415                return err;
 416
 417        reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
 418        val = SENSORS_LIMIT(val, 0, 255);
 419
 420        mutex_lock(&data->update_lock);
 421        data->pwm1[nr] = data->pwm_highres ? val :
 422                        (val * data->pwm1_freq * 2 + 127) / 255;
 423        i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
 424        mutex_unlock(&data->update_lock);
 425        return count;
 426}
 427
 428static ssize_t show_pwm1_enable(struct device *dev,
 429                                struct device_attribute *dummy, char *buf)
 430{
 431        struct lm63_data *data = lm63_update_device(dev);
 432        return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 433}
 434
 435static ssize_t set_pwm1_enable(struct device *dev,
 436                               struct device_attribute *dummy,
 437                               const char *buf, size_t count)
 438{
 439        struct i2c_client *client = to_i2c_client(dev);
 440        struct lm63_data *data = i2c_get_clientdata(client);
 441        unsigned long val;
 442        int err;
 443
 444        err = kstrtoul(buf, 10, &val);
 445        if (err)
 446                return err;
 447        if (val < 1 || val > 2)
 448                return -EINVAL;
 449
 450        /*
 451         * Only let the user switch to automatic mode if the lookup table
 452         * looks sane.
 453         */
 454        if (val == 2 && lm63_lut_looks_bad(client))
 455                return -EPERM;
 456
 457        mutex_lock(&data->update_lock);
 458        data->config_fan = i2c_smbus_read_byte_data(client,
 459                                                    LM63_REG_CONFIG_FAN);
 460        if (val == 1)
 461                data->config_fan |= 0x20;
 462        else
 463                data->config_fan &= ~0x20;
 464        i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
 465        data->config_fan);
 466        mutex_unlock(&data->update_lock);
 467        return count;
 468}
 469
 470/*
 471 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
 472 * For remote sensor registers temp2_offset has to be considered,
 473 * for local sensor it must not.
 474 * So we need separate 8bit accessors for local and remote sensor.
 475 */
 476static ssize_t show_local_temp8(struct device *dev,
 477                                struct device_attribute *devattr,
 478                                char *buf)
 479{
 480        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 481        struct lm63_data *data = lm63_update_device(dev);
 482        return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 483}
 484
 485static ssize_t show_remote_temp8(struct device *dev,
 486                                 struct device_attribute *devattr,
 487                                 char *buf)
 488{
 489        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 490        struct lm63_data *data = lm63_update_device(dev);
 491        return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
 492                       + data->temp2_offset);
 493}
 494
 495static ssize_t show_lut_temp(struct device *dev,
 496                              struct device_attribute *devattr,
 497                              char *buf)
 498{
 499        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 500        struct lm63_data *data = lm63_update_device(dev);
 501        return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
 502                       + data->temp2_offset);
 503}
 504
 505static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
 506                         const char *buf, size_t count)
 507{
 508        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 509        struct i2c_client *client = to_i2c_client(dev);
 510        struct lm63_data *data = i2c_get_clientdata(client);
 511        int nr = attr->index;
 512        long val;
 513        int err;
 514        int temp;
 515        u8 reg;
 516
 517        err = kstrtol(buf, 10, &val);
 518        if (err)
 519                return err;
 520
 521        mutex_lock(&data->update_lock);
 522        switch (nr) {
 523        case 2:
 524                reg = LM63_REG_REMOTE_TCRIT;
 525                if (data->remote_unsigned)
 526                        temp = TEMP8U_TO_REG(val - data->temp2_offset);
 527                else
 528                        temp = TEMP8_TO_REG(val - data->temp2_offset);
 529                break;
 530        case 1:
 531                reg = LM63_REG_LOCAL_HIGH;
 532                temp = TEMP8_TO_REG(val);
 533                break;
 534        default:        /* lookup table */
 535                reg = LM63_REG_LUT_TEMP(nr - 3);
 536                temp = lut_temp_to_reg(data, val);
 537        }
 538        data->temp8[nr] = temp;
 539        i2c_smbus_write_byte_data(client, reg, temp);
 540        mutex_unlock(&data->update_lock);
 541        return count;
 542}
 543
 544static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 545                           char *buf)
 546{
 547        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 548        struct lm63_data *data = lm63_update_device(dev);
 549        int nr = attr->index;
 550        int temp;
 551
 552        if (!nr) {
 553                /*
 554                 * Use unsigned temperature unless its value is zero.
 555                 * If it is zero, use signed temperature.
 556                 */
 557                if (data->temp11u)
 558                        temp = TEMP11_FROM_REG(data->temp11u);
 559                else
 560                        temp = TEMP11_FROM_REG(data->temp11[nr]);
 561        } else {
 562                if (data->remote_unsigned && nr == 2)
 563                        temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
 564                else
 565                        temp = TEMP11_FROM_REG(data->temp11[nr]);
 566        }
 567        return sprintf(buf, "%d\n", temp + data->temp2_offset);
 568}
 569
 570static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 571                          const char *buf, size_t count)
 572{
 573        static const u8 reg[6] = {
 574                LM63_REG_REMOTE_LOW_MSB,
 575                LM63_REG_REMOTE_LOW_LSB,
 576                LM63_REG_REMOTE_HIGH_MSB,
 577                LM63_REG_REMOTE_HIGH_LSB,
 578                LM63_REG_REMOTE_OFFSET_MSB,
 579                LM63_REG_REMOTE_OFFSET_LSB,
 580        };
 581
 582        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 583        struct i2c_client *client = to_i2c_client(dev);
 584        struct lm63_data *data = i2c_get_clientdata(client);
 585        long val;
 586        int err;
 587        int nr = attr->index;
 588
 589        err = kstrtol(buf, 10, &val);
 590        if (err)
 591                return err;
 592
 593        mutex_lock(&data->update_lock);
 594        if (data->remote_unsigned && nr == 2)
 595                data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
 596        else
 597                data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
 598
 599        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 600                                  data->temp11[nr] >> 8);
 601        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 602                                  data->temp11[nr] & 0xff);
 603        mutex_unlock(&data->update_lock);
 604        return count;
 605}
 606
 607/*
 608 * Hysteresis register holds a relative value, while we want to present
 609 * an absolute to user-space
 610 */
 611static ssize_t show_temp2_crit_hyst(struct device *dev,
 612                                    struct device_attribute *dummy, char *buf)
 613{
 614        struct lm63_data *data = lm63_update_device(dev);
 615        return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
 616                       + data->temp2_offset
 617                       - TEMP8_FROM_REG(data->temp2_crit_hyst));
 618}
 619
 620static ssize_t show_lut_temp_hyst(struct device *dev,
 621                                  struct device_attribute *devattr, char *buf)
 622{
 623        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 624        struct lm63_data *data = lm63_update_device(dev);
 625
 626        return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
 627                       + data->temp2_offset
 628                       - TEMP8_FROM_REG(data->lut_temp_hyst));
 629}
 630
 631/*
 632 * And now the other way around, user-space provides an absolute
 633 * hysteresis value and we have to store a relative one
 634 */
 635static ssize_t set_temp2_crit_hyst(struct device *dev,
 636                                   struct device_attribute *dummy,
 637                                   const char *buf, size_t count)
 638{
 639        struct i2c_client *client = to_i2c_client(dev);
 640        struct lm63_data *data = i2c_get_clientdata(client);
 641        long val;
 642        int err;
 643        long hyst;
 644
 645        err = kstrtol(buf, 10, &val);
 646        if (err)
 647                return err;
 648
 649        mutex_lock(&data->update_lock);
 650        hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
 651        i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 652                                  HYST_TO_REG(hyst));
 653        mutex_unlock(&data->update_lock);
 654        return count;
 655}
 656
 657/*
 658 * Set conversion rate.
 659 * client->update_lock must be held when calling this function.
 660 */
 661static void lm63_set_convrate(struct i2c_client *client, struct lm63_data *data,
 662                              unsigned int interval)
 663{
 664        int i;
 665        unsigned int update_interval;
 666
 667        /* Shift calculations to avoid rounding errors */
 668        interval <<= 6;
 669
 670        /* find the nearest update rate */
 671        update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
 672          / data->max_convrate_hz;
 673        for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
 674                if (interval >= update_interval * 3 / 4)
 675                        break;
 676
 677        i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
 678        data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
 679}
 680
 681static ssize_t show_update_interval(struct device *dev,
 682                                    struct device_attribute *attr, char *buf)
 683{
 684        struct lm63_data *data = dev_get_drvdata(dev);
 685
 686        return sprintf(buf, "%u\n", data->update_interval);
 687}
 688
 689static ssize_t set_update_interval(struct device *dev,
 690                                   struct device_attribute *attr,
 691                                   const char *buf, size_t count)
 692{
 693        struct i2c_client *client = to_i2c_client(dev);
 694        struct lm63_data *data = i2c_get_clientdata(client);
 695        unsigned long val;
 696        int err;
 697
 698        err = kstrtoul(buf, 10, &val);
 699        if (err)
 700                return err;
 701
 702        mutex_lock(&data->update_lock);
 703        lm63_set_convrate(client, data, SENSORS_LIMIT(val, 0, 100000));
 704        mutex_unlock(&data->update_lock);
 705
 706        return count;
 707}
 708
 709static ssize_t show_type(struct device *dev, struct device_attribute *attr,
 710                         char *buf)
 711{
 712        struct i2c_client *client = to_i2c_client(dev);
 713        struct lm63_data *data = i2c_get_clientdata(client);
 714
 715        return sprintf(buf, data->trutherm ? "1\n" : "2\n");
 716}
 717
 718static ssize_t set_type(struct device *dev, struct device_attribute *attr,
 719                        const char *buf, size_t count)
 720{
 721        struct i2c_client *client = to_i2c_client(dev);
 722        struct lm63_data *data = i2c_get_clientdata(client);
 723        unsigned long val;
 724        int ret;
 725        u8 reg;
 726
 727        ret = kstrtoul(buf, 10, &val);
 728        if (ret < 0)
 729                return ret;
 730        if (val != 1 && val != 2)
 731                return -EINVAL;
 732
 733        mutex_lock(&data->update_lock);
 734        data->trutherm = val == 1;
 735        reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
 736        i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
 737                                  reg | (data->trutherm ? 0x02 : 0x00));
 738        data->valid = 0;
 739        mutex_unlock(&data->update_lock);
 740
 741        return count;
 742}
 743
 744static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 745                           char *buf)
 746{
 747        struct lm63_data *data = lm63_update_device(dev);
 748        return sprintf(buf, "%u\n", data->alarms);
 749}
 750
 751static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 752                          char *buf)
 753{
 754        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 755        struct lm63_data *data = lm63_update_device(dev);
 756        int bitnr = attr->index;
 757
 758        return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 759}
 760
 761static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 762static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 763        set_fan, 1);
 764
 765static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
 766static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
 767        show_pwm1_enable, set_pwm1_enable);
 768static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
 769        show_pwm1, set_pwm1, 1);
 770static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
 771        show_lut_temp, set_temp8, 3);
 772static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
 773        show_lut_temp_hyst, NULL, 3);
 774static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
 775        show_pwm1, set_pwm1, 2);
 776static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
 777        show_lut_temp, set_temp8, 4);
 778static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
 779        show_lut_temp_hyst, NULL, 4);
 780static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
 781        show_pwm1, set_pwm1, 3);
 782static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
 783        show_lut_temp, set_temp8, 5);
 784static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
 785        show_lut_temp_hyst, NULL, 5);
 786static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
 787        show_pwm1, set_pwm1, 4);
 788static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
 789        show_lut_temp, set_temp8, 6);
 790static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
 791        show_lut_temp_hyst, NULL, 6);
 792static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
 793        show_pwm1, set_pwm1, 5);
 794static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
 795        show_lut_temp, set_temp8, 7);
 796static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
 797        show_lut_temp_hyst, NULL, 7);
 798static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
 799        show_pwm1, set_pwm1, 6);
 800static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
 801        show_lut_temp, set_temp8, 8);
 802static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
 803        show_lut_temp_hyst, NULL, 8);
 804static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
 805        show_pwm1, set_pwm1, 7);
 806static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
 807        show_lut_temp, set_temp8, 9);
 808static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
 809        show_lut_temp_hyst, NULL, 9);
 810static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
 811        show_pwm1, set_pwm1, 8);
 812static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
 813        show_lut_temp, set_temp8, 10);
 814static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
 815        show_lut_temp_hyst, NULL, 10);
 816static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
 817        show_pwm1, set_pwm1, 9);
 818static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
 819        show_lut_temp, set_temp8, 11);
 820static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
 821        show_lut_temp_hyst, NULL, 11);
 822static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
 823        show_pwm1, set_pwm1, 10);
 824static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
 825        show_lut_temp, set_temp8, 12);
 826static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
 827        show_lut_temp_hyst, NULL, 12);
 828static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
 829        show_pwm1, set_pwm1, 11);
 830static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
 831        show_lut_temp, set_temp8, 13);
 832static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
 833        show_lut_temp_hyst, NULL, 13);
 834static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
 835        show_pwm1, set_pwm1, 12);
 836static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
 837        show_lut_temp, set_temp8, 14);
 838static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
 839        show_lut_temp_hyst, NULL, 14);
 840
 841static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
 842static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
 843        set_temp8, 1);
 844
 845static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 846static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 847        set_temp11, 1);
 848static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 849        set_temp11, 2);
 850static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
 851        set_temp11, 3);
 852static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
 853        set_temp8, 2);
 854static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 855        set_temp2_crit_hyst);
 856
 857static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type);
 858
 859/* Individual alarm files */
 860static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 861static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 862static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 863static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 864static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 865static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 866/* Raw alarm file for compatibility */
 867static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 868
 869static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
 870                   set_update_interval);
 871
 872static struct attribute *lm63_attributes[] = {
 873        &sensor_dev_attr_pwm1.dev_attr.attr,
 874        &dev_attr_pwm1_enable.attr,
 875        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
 876        &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
 877        &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
 878        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
 879        &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
 880        &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
 881        &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
 882        &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
 883        &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
 884        &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
 885        &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
 886        &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
 887        &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
 888        &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
 889        &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
 890        &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
 891        &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
 892        &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
 893        &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
 894        &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
 895        &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
 896        &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
 897        &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
 898        &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
 899
 900        &sensor_dev_attr_temp1_input.dev_attr.attr,
 901        &sensor_dev_attr_temp2_input.dev_attr.attr,
 902        &sensor_dev_attr_temp2_min.dev_attr.attr,
 903        &sensor_dev_attr_temp1_max.dev_attr.attr,
 904        &sensor_dev_attr_temp2_max.dev_attr.attr,
 905        &sensor_dev_attr_temp2_offset.dev_attr.attr,
 906        &sensor_dev_attr_temp2_crit.dev_attr.attr,
 907        &dev_attr_temp2_crit_hyst.attr,
 908
 909        &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 910        &sensor_dev_attr_temp2_fault.dev_attr.attr,
 911        &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 912        &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 913        &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 914        &dev_attr_alarms.attr,
 915        &dev_attr_update_interval.attr,
 916        NULL
 917};
 918
 919static struct attribute *lm63_attributes_extra_lut[] = {
 920        &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr,
 921        &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr,
 922        &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr,
 923        &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr,
 924        &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr,
 925        &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr,
 926        &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr,
 927        &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr,
 928        &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr,
 929        &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr,
 930        &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr,
 931        &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr,
 932        NULL
 933};
 934
 935static const struct attribute_group lm63_group_extra_lut = {
 936        .attrs = lm63_attributes_extra_lut,
 937};
 938
 939/*
 940 * On LM63, temp2_crit can be set only once, which should be job
 941 * of the bootloader.
 942 * On LM64, temp2_crit can always be set.
 943 * On LM96163, temp2_crit can be set if bit 1 of the configuration
 944 * register is true.
 945 */
 946static umode_t lm63_attribute_mode(struct kobject *kobj,
 947                                   struct attribute *attr, int index)
 948{
 949        struct device *dev = container_of(kobj, struct device, kobj);
 950        struct i2c_client *client = to_i2c_client(dev);
 951        struct lm63_data *data = i2c_get_clientdata(client);
 952
 953        if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
 954            && (data->kind == lm64 ||
 955                (data->kind == lm96163 && (data->config & 0x02))))
 956                return attr->mode | S_IWUSR;
 957
 958        return attr->mode;
 959}
 960
 961static const struct attribute_group lm63_group = {
 962        .is_visible = lm63_attribute_mode,
 963        .attrs = lm63_attributes,
 964};
 965
 966static struct attribute *lm63_attributes_fan1[] = {
 967        &sensor_dev_attr_fan1_input.dev_attr.attr,
 968        &sensor_dev_attr_fan1_min.dev_attr.attr,
 969
 970        &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 971        NULL
 972};
 973
 974static const struct attribute_group lm63_group_fan1 = {
 975        .attrs = lm63_attributes_fan1,
 976};
 977
 978/*
 979 * Real code
 980 */
 981
 982/* Return 0 if detection is successful, -ENODEV otherwise */
 983static int lm63_detect(struct i2c_client *client,
 984                       struct i2c_board_info *info)
 985{
 986        struct i2c_adapter *adapter = client->adapter;
 987        u8 man_id, chip_id, reg_config1, reg_config2;
 988        u8 reg_alert_status, reg_alert_mask;
 989        int address = client->addr;
 990
 991        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 992                return -ENODEV;
 993
 994        man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
 995        chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
 996
 997        reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 998        reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
 999        reg_alert_status = i2c_smbus_read_byte_data(client,
1000                           LM63_REG_ALERT_STATUS);
1001        reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
1002
1003        if (man_id != 0x01 /* National Semiconductor */
1004         || (reg_config1 & 0x18) != 0x00
1005         || (reg_config2 & 0xF8) != 0x00
1006         || (reg_alert_status & 0x20) != 0x00
1007         || (reg_alert_mask & 0xA4) != 0xA4) {
1008                dev_dbg(&adapter->dev,
1009                        "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
1010                        man_id, chip_id);
1011                return -ENODEV;
1012        }
1013
1014        if (chip_id == 0x41 && address == 0x4c)
1015                strlcpy(info->type, "lm63", I2C_NAME_SIZE);
1016        else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
1017                strlcpy(info->type, "lm64", I2C_NAME_SIZE);
1018        else if (chip_id == 0x49 && address == 0x4c)
1019                strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
1020        else
1021                return -ENODEV;
1022
1023        return 0;
1024}
1025
1026/*
1027 * Ideally we shouldn't have to initialize anything, since the BIOS
1028 * should have taken care of everything
1029 */
1030static void lm63_init_client(struct i2c_client *client)
1031{
1032        struct lm63_data *data = i2c_get_clientdata(client);
1033        u8 convrate;
1034
1035        data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1036        data->config_fan = i2c_smbus_read_byte_data(client,
1037                                                    LM63_REG_CONFIG_FAN);
1038
1039        /* Start converting if needed */
1040        if (data->config & 0x40) { /* standby */
1041                dev_dbg(&client->dev, "Switching to operational mode\n");
1042                data->config &= 0xA7;
1043                i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
1044                                          data->config);
1045        }
1046        /* Tachometer is always enabled on LM64 */
1047        if (data->kind == lm64)
1048                data->config |= 0x04;
1049
1050        /* We may need pwm1_freq before ever updating the client data */
1051        data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
1052        if (data->pwm1_freq == 0)
1053                data->pwm1_freq = 1;
1054
1055        switch (data->kind) {
1056        case lm63:
1057        case lm64:
1058                data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
1059                data->lut_size = 8;
1060                break;
1061        case lm96163:
1062                data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
1063                data->lut_size = 12;
1064                data->trutherm
1065                  = i2c_smbus_read_byte_data(client,
1066                                             LM96163_REG_TRUTHERM) & 0x02;
1067                break;
1068        }
1069        convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
1070        if (unlikely(convrate > LM63_MAX_CONVRATE))
1071                convrate = LM63_MAX_CONVRATE;
1072        data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
1073                                                convrate);
1074
1075        /*
1076         * For LM96163, check if high resolution PWM
1077         * and unsigned temperature format is enabled.
1078         */
1079        if (data->kind == lm96163) {
1080                u8 config_enhanced
1081                  = i2c_smbus_read_byte_data(client,
1082                                             LM96163_REG_CONFIG_ENHANCED);
1083                if (config_enhanced & 0x20)
1084                        data->lut_temp_highres = true;
1085                if ((config_enhanced & 0x10)
1086                    && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
1087                        data->pwm_highres = true;
1088                if (config_enhanced & 0x08)
1089                        data->remote_unsigned = true;
1090        }
1091
1092        /* Show some debug info about the LM63 configuration */
1093        if (data->kind == lm63)
1094                dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
1095                        (data->config & 0x04) ? "tachometer input" :
1096                        "alert output");
1097        dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
1098                (data->config_fan & 0x08) ? "1.4" : "360",
1099                ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
1100        dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
1101                (data->config_fan & 0x10) ? "low" : "high",
1102                (data->config_fan & 0x20) ? "manual" : "auto");
1103}
1104
1105static int lm63_probe(struct i2c_client *client,
1106                      const struct i2c_device_id *id)
1107{
1108        struct lm63_data *data;
1109        int err;
1110
1111        data = devm_kzalloc(&client->dev, sizeof(struct lm63_data), GFP_KERNEL);
1112        if (!data)
1113                return -ENOMEM;
1114
1115        i2c_set_clientdata(client, data);
1116        data->valid = 0;
1117        mutex_init(&data->update_lock);
1118
1119        /* Set the device type */
1120        data->kind = id->driver_data;
1121        if (data->kind == lm64)
1122                data->temp2_offset = 16000;
1123
1124        /* Initialize chip */
1125        lm63_init_client(client);
1126
1127        /* Register sysfs hooks */
1128        err = sysfs_create_group(&client->dev.kobj, &lm63_group);
1129        if (err)
1130                return err;
1131        if (data->config & 0x04) { /* tachometer enabled */
1132                err = sysfs_create_group(&client->dev.kobj, &lm63_group_fan1);
1133                if (err)
1134                        goto exit_remove_files;
1135        }
1136        if (data->kind == lm96163) {
1137                err = device_create_file(&client->dev, &dev_attr_temp2_type);
1138                if (err)
1139                        goto exit_remove_files;
1140
1141                err = sysfs_create_group(&client->dev.kobj,
1142                                         &lm63_group_extra_lut);
1143                if (err)
1144                        goto exit_remove_files;
1145        }
1146
1147        data->hwmon_dev = hwmon_device_register(&client->dev);
1148        if (IS_ERR(data->hwmon_dev)) {
1149                err = PTR_ERR(data->hwmon_dev);
1150                goto exit_remove_files;
1151        }
1152
1153        return 0;
1154
1155exit_remove_files:
1156        sysfs_remove_group(&client->dev.kobj, &lm63_group);
1157        sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
1158        if (data->kind == lm96163) {
1159                device_remove_file(&client->dev, &dev_attr_temp2_type);
1160                sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut);
1161        }
1162        return err;
1163}
1164
1165static int lm63_remove(struct i2c_client *client)
1166{
1167        struct lm63_data *data = i2c_get_clientdata(client);
1168
1169        hwmon_device_unregister(data->hwmon_dev);
1170        sysfs_remove_group(&client->dev.kobj, &lm63_group);
1171        sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
1172        if (data->kind == lm96163) {
1173                device_remove_file(&client->dev, &dev_attr_temp2_type);
1174                sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut);
1175        }
1176
1177        return 0;
1178}
1179
1180/*
1181 * Driver data (common to all clients)
1182 */
1183
1184static const struct i2c_device_id lm63_id[] = {
1185        { "lm63", lm63 },
1186        { "lm64", lm64 },
1187        { "lm96163", lm96163 },
1188        { }
1189};
1190MODULE_DEVICE_TABLE(i2c, lm63_id);
1191
1192static struct i2c_driver lm63_driver = {
1193        .class          = I2C_CLASS_HWMON,
1194        .driver = {
1195                .name   = "lm63",
1196        },
1197        .probe          = lm63_probe,
1198        .remove         = lm63_remove,
1199        .id_table       = lm63_id,
1200        .detect         = lm63_detect,
1201        .address_list   = normal_i2c,
1202};
1203
1204module_i2c_driver(lm63_driver);
1205
1206MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1207MODULE_DESCRIPTION("LM63 driver");
1208MODULE_LICENSE("GPL");
1209
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