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 <jdelvare@suse.de>
   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)       DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
 130                                                            127000), 1000)
 131#define TEMP8U_TO_REG(val)      DIV_ROUND_CLOSEST(clamp_val((val), 0, \
 132                                                            255000), 1000)
 133#define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 134#define TEMP11_TO_REG(val)      (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
 135                                                             127875), 125) * 32)
 136#define TEMP11U_TO_REG(val)     (DIV_ROUND_CLOSEST(clamp_val((val), 0, \
 137                                                             255875), 125) * 32)
 138#define HYST_TO_REG(val)        DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \
 139                                                  1000)
 140
 141#define UPDATE_INTERVAL(max, rate) \
 142                        ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max))
 143
 144enum chips { lm63, lm64, lm96163 };
 145
 146/*
 147 * Client data (each client gets its own)
 148 */
 149
 150struct lm63_data {
 151        struct i2c_client *client;
 152        struct mutex update_lock;
 153        const struct attribute_group *groups[5];
 154        char valid; /* zero until following fields are valid */
 155        char lut_valid; /* zero until lut fields are valid */
 156        unsigned long last_updated; /* in jiffies */
 157        unsigned long lut_last_updated; /* in jiffies */
 158        enum chips kind;
 159        int temp2_offset;
 160
 161        int update_interval;    /* in milliseconds */
 162        int max_convrate_hz;
 163        int lut_size;           /* 8 or 12 */
 164
 165        /* registers values */
 166        u8 config, config_fan;
 167        u16 fan[2];     /* 0: input
 168                           1: low limit */
 169        u8 pwm1_freq;
 170        u8 pwm1[13];    /* 0: current output
 171                           1-12: lookup table */
 172        s8 temp8[15];   /* 0: local input
 173                           1: local high limit
 174                           2: remote critical limit
 175                           3-14: lookup table */
 176        s16 temp11[4];  /* 0: remote input
 177                           1: remote low limit
 178                           2: remote high limit
 179                           3: remote offset */
 180        u16 temp11u;    /* remote input (unsigned) */
 181        u8 temp2_crit_hyst;
 182        u8 lut_temp_hyst;
 183        u8 alarms;
 184        bool pwm_highres;
 185        bool lut_temp_highres;
 186        bool remote_unsigned; /* true if unsigned remote upper limits */
 187        bool trutherm;
 188};
 189
 190static inline int temp8_from_reg(struct lm63_data *data, int nr)
 191{
 192        if (data->remote_unsigned)
 193                return TEMP8_FROM_REG((u8)data->temp8[nr]);
 194        return TEMP8_FROM_REG(data->temp8[nr]);
 195}
 196
 197static inline int lut_temp_from_reg(struct lm63_data *data, int nr)
 198{
 199        return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000);
 200}
 201
 202static inline int lut_temp_to_reg(struct lm63_data *data, long val)
 203{
 204        val -= data->temp2_offset;
 205        if (data->lut_temp_highres)
 206                return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500);
 207        else
 208                return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000);
 209}
 210
 211/*
 212 * Update the lookup table register cache.
 213 * client->update_lock must be held when calling this function.
 214 */
 215static void lm63_update_lut(struct lm63_data *data)
 216{
 217        struct i2c_client *client = data->client;
 218        int i;
 219
 220        if (time_after(jiffies, data->lut_last_updated + 5 * HZ) ||
 221            !data->lut_valid) {
 222                for (i = 0; i < data->lut_size; i++) {
 223                        data->pwm1[1 + i] = i2c_smbus_read_byte_data(client,
 224                                            LM63_REG_LUT_PWM(i));
 225                        data->temp8[3 + i] = i2c_smbus_read_byte_data(client,
 226                                             LM63_REG_LUT_TEMP(i));
 227                }
 228                data->lut_temp_hyst = i2c_smbus_read_byte_data(client,
 229                                      LM63_REG_LUT_TEMP_HYST);
 230
 231                data->lut_last_updated = jiffies;
 232                data->lut_valid = 1;
 233        }
 234}
 235
 236static struct lm63_data *lm63_update_device(struct device *dev)
 237{
 238        struct lm63_data *data = dev_get_drvdata(dev);
 239        struct i2c_client *client = data->client;
 240        unsigned long next_update;
 241
 242        mutex_lock(&data->update_lock);
 243
 244        next_update = data->last_updated +
 245                      msecs_to_jiffies(data->update_interval);
 246        if (time_after(jiffies, next_update) || !data->valid) {
 247                if (data->config & 0x04) { /* tachometer enabled  */
 248                        /* order matters for fan1_input */
 249                        data->fan[0] = i2c_smbus_read_byte_data(client,
 250                                       LM63_REG_TACH_COUNT_LSB) & 0xFC;
 251                        data->fan[0] |= i2c_smbus_read_byte_data(client,
 252                                        LM63_REG_TACH_COUNT_MSB) << 8;
 253                        data->fan[1] = (i2c_smbus_read_byte_data(client,
 254                                        LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 255                                     | (i2c_smbus_read_byte_data(client,
 256                                        LM63_REG_TACH_LIMIT_MSB) << 8);
 257                }
 258
 259                data->pwm1_freq = i2c_smbus_read_byte_data(client,
 260                                  LM63_REG_PWM_FREQ);
 261                if (data->pwm1_freq == 0)
 262                        data->pwm1_freq = 1;
 263                data->pwm1[0] = i2c_smbus_read_byte_data(client,
 264                                LM63_REG_PWM_VALUE);
 265
 266                data->temp8[0] = i2c_smbus_read_byte_data(client,
 267                                 LM63_REG_LOCAL_TEMP);
 268                data->temp8[1] = i2c_smbus_read_byte_data(client,
 269                                 LM63_REG_LOCAL_HIGH);
 270
 271                /* order matters for temp2_input */
 272                data->temp11[0] = i2c_smbus_read_byte_data(client,
 273                                  LM63_REG_REMOTE_TEMP_MSB) << 8;
 274                data->temp11[0] |= i2c_smbus_read_byte_data(client,
 275                                   LM63_REG_REMOTE_TEMP_LSB);
 276                data->temp11[1] = (i2c_smbus_read_byte_data(client,
 277                                  LM63_REG_REMOTE_LOW_MSB) << 8)
 278                                | i2c_smbus_read_byte_data(client,
 279                                  LM63_REG_REMOTE_LOW_LSB);
 280                data->temp11[2] = (i2c_smbus_read_byte_data(client,
 281                                  LM63_REG_REMOTE_HIGH_MSB) << 8)
 282                                | i2c_smbus_read_byte_data(client,
 283                                  LM63_REG_REMOTE_HIGH_LSB);
 284                data->temp11[3] = (i2c_smbus_read_byte_data(client,
 285                                  LM63_REG_REMOTE_OFFSET_MSB) << 8)
 286                                | i2c_smbus_read_byte_data(client,
 287                                  LM63_REG_REMOTE_OFFSET_LSB);
 288
 289                if (data->kind == lm96163)
 290                        data->temp11u = (i2c_smbus_read_byte_data(client,
 291                                        LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
 292                                      | i2c_smbus_read_byte_data(client,
 293                                        LM96163_REG_REMOTE_TEMP_U_LSB);
 294
 295                data->temp8[2] = i2c_smbus_read_byte_data(client,
 296                                 LM63_REG_REMOTE_TCRIT);
 297                data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 298                                        LM63_REG_REMOTE_TCRIT_HYST);
 299
 300                data->alarms = i2c_smbus_read_byte_data(client,
 301                               LM63_REG_ALERT_STATUS) & 0x7F;
 302
 303                data->last_updated = jiffies;
 304                data->valid = 1;
 305        }
 306
 307        lm63_update_lut(data);
 308
 309        mutex_unlock(&data->update_lock);
 310
 311        return data;
 312}
 313
 314/*
 315 * Trip points in the lookup table should be in ascending order for both
 316 * temperatures and PWM output values.
 317 */
 318static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data)
 319{
 320        int i;
 321
 322        mutex_lock(&data->update_lock);
 323        lm63_update_lut(data);
 324
 325        for (i = 1; i < data->lut_size; i++) {
 326                if (data->pwm1[1 + i - 1] > data->pwm1[1 + i]
 327                 || data->temp8[3 + i - 1] > data->temp8[3 + i]) {
 328                        dev_warn(dev,
 329                                 "Lookup table doesn't look sane (check entries %d and %d)\n",
 330                                 i, i + 1);
 331                        break;
 332                }
 333        }
 334        mutex_unlock(&data->update_lock);
 335
 336        return i == data->lut_size ? 0 : 1;
 337}
 338
 339/*
 340 * Sysfs callback functions and files
 341 */
 342
 343static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 344                        char *buf)
 345{
 346        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 347        struct lm63_data *data = lm63_update_device(dev);
 348        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 349}
 350
 351static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 352                       const char *buf, size_t count)
 353{
 354        struct lm63_data *data = dev_get_drvdata(dev);
 355        struct i2c_client *client = data->client;
 356        unsigned long val;
 357        int err;
 358
 359        err = kstrtoul(buf, 10, &val);
 360        if (err)
 361                return err;
 362
 363        mutex_lock(&data->update_lock);
 364        data->fan[1] = FAN_TO_REG(val);
 365        i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 366                                  data->fan[1] & 0xFF);
 367        i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 368                                  data->fan[1] >> 8);
 369        mutex_unlock(&data->update_lock);
 370        return count;
 371}
 372
 373static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
 374                         char *buf)
 375{
 376        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 377        struct lm63_data *data = lm63_update_device(dev);
 378        int nr = attr->index;
 379        int pwm;
 380
 381        if (data->pwm_highres)
 382                pwm = data->pwm1[nr];
 383        else
 384                pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
 385                       255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
 386                       (2 * data->pwm1_freq);
 387
 388        return sprintf(buf, "%d\n", pwm);
 389}
 390
 391static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
 392                        const char *buf, size_t count)
 393{
 394        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 395        struct lm63_data *data = dev_get_drvdata(dev);
 396        struct i2c_client *client = data->client;
 397        int nr = attr->index;
 398        unsigned long val;
 399        int err;
 400        u8 reg;
 401
 402        if (!(data->config_fan & 0x20)) /* register is read-only */
 403                return -EPERM;
 404
 405        err = kstrtoul(buf, 10, &val);
 406        if (err)
 407                return err;
 408
 409        reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
 410        val = clamp_val(val, 0, 255);
 411
 412        mutex_lock(&data->update_lock);
 413        data->pwm1[nr] = data->pwm_highres ? val :
 414                        (val * data->pwm1_freq * 2 + 127) / 255;
 415        i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
 416        mutex_unlock(&data->update_lock);
 417        return count;
 418}
 419
 420static ssize_t show_pwm1_enable(struct device *dev,
 421                                struct device_attribute *dummy, char *buf)
 422{
 423        struct lm63_data *data = lm63_update_device(dev);
 424        return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 425}
 426
 427static ssize_t set_pwm1_enable(struct device *dev,
 428                               struct device_attribute *dummy,
 429                               const char *buf, size_t count)
 430{
 431        struct lm63_data *data = dev_get_drvdata(dev);
 432        struct i2c_client *client = data->client;
 433        unsigned long val;
 434        int err;
 435
 436        err = kstrtoul(buf, 10, &val);
 437        if (err)
 438                return err;
 439        if (val < 1 || val > 2)
 440                return -EINVAL;
 441
 442        /*
 443         * Only let the user switch to automatic mode if the lookup table
 444         * looks sane.
 445         */
 446        if (val == 2 && lm63_lut_looks_bad(dev, data))
 447                return -EPERM;
 448
 449        mutex_lock(&data->update_lock);
 450        data->config_fan = i2c_smbus_read_byte_data(client,
 451                                                    LM63_REG_CONFIG_FAN);
 452        if (val == 1)
 453                data->config_fan |= 0x20;
 454        else
 455                data->config_fan &= ~0x20;
 456        i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
 457                                  data->config_fan);
 458        mutex_unlock(&data->update_lock);
 459        return count;
 460}
 461
 462/*
 463 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
 464 * For remote sensor registers temp2_offset has to be considered,
 465 * for local sensor it must not.
 466 * So we need separate 8bit accessors for local and remote sensor.
 467 */
 468static ssize_t show_local_temp8(struct device *dev,
 469                                struct device_attribute *devattr,
 470                                char *buf)
 471{
 472        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 473        struct lm63_data *data = lm63_update_device(dev);
 474        return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 475}
 476
 477static ssize_t show_remote_temp8(struct device *dev,
 478                                 struct device_attribute *devattr,
 479                                 char *buf)
 480{
 481        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 482        struct lm63_data *data = lm63_update_device(dev);
 483        return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
 484                       + data->temp2_offset);
 485}
 486
 487static ssize_t show_lut_temp(struct device *dev,
 488                              struct device_attribute *devattr,
 489                              char *buf)
 490{
 491        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 492        struct lm63_data *data = lm63_update_device(dev);
 493        return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
 494                       + data->temp2_offset);
 495}
 496
 497static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
 498                         const char *buf, size_t count)
 499{
 500        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 501        struct lm63_data *data = dev_get_drvdata(dev);
 502        struct i2c_client *client = data->client;
 503        int nr = attr->index;
 504        long val;
 505        int err;
 506        int temp;
 507        u8 reg;
 508
 509        err = kstrtol(buf, 10, &val);
 510        if (err)
 511                return err;
 512
 513        mutex_lock(&data->update_lock);
 514        switch (nr) {
 515        case 2:
 516                reg = LM63_REG_REMOTE_TCRIT;
 517                if (data->remote_unsigned)
 518                        temp = TEMP8U_TO_REG(val - data->temp2_offset);
 519                else
 520                        temp = TEMP8_TO_REG(val - data->temp2_offset);
 521                break;
 522        case 1:
 523                reg = LM63_REG_LOCAL_HIGH;
 524                temp = TEMP8_TO_REG(val);
 525                break;
 526        default:        /* lookup table */
 527                reg = LM63_REG_LUT_TEMP(nr - 3);
 528                temp = lut_temp_to_reg(data, val);
 529        }
 530        data->temp8[nr] = temp;
 531        i2c_smbus_write_byte_data(client, reg, temp);
 532        mutex_unlock(&data->update_lock);
 533        return count;
 534}
 535
 536static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 537                           char *buf)
 538{
 539        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 540        struct lm63_data *data = lm63_update_device(dev);
 541        int nr = attr->index;
 542        int temp;
 543
 544        if (!nr) {
 545                /*
 546                 * Use unsigned temperature unless its value is zero.
 547                 * If it is zero, use signed temperature.
 548                 */
 549                if (data->temp11u)
 550                        temp = TEMP11_FROM_REG(data->temp11u);
 551                else
 552                        temp = TEMP11_FROM_REG(data->temp11[nr]);
 553        } else {
 554                if (data->remote_unsigned && nr == 2)
 555                        temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
 556                else
 557                        temp = TEMP11_FROM_REG(data->temp11[nr]);
 558        }
 559        return sprintf(buf, "%d\n", temp + data->temp2_offset);
 560}
 561
 562static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 563                          const char *buf, size_t count)
 564{
 565        static const u8 reg[6] = {
 566                LM63_REG_REMOTE_LOW_MSB,
 567                LM63_REG_REMOTE_LOW_LSB,
 568                LM63_REG_REMOTE_HIGH_MSB,
 569                LM63_REG_REMOTE_HIGH_LSB,
 570                LM63_REG_REMOTE_OFFSET_MSB,
 571                LM63_REG_REMOTE_OFFSET_LSB,
 572        };
 573
 574        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 575        struct lm63_data *data = dev_get_drvdata(dev);
 576        struct i2c_client *client = data->client;
 577        long val;
 578        int err;
 579        int nr = attr->index;
 580
 581        err = kstrtol(buf, 10, &val);
 582        if (err)
 583                return err;
 584
 585        mutex_lock(&data->update_lock);
 586        if (data->remote_unsigned && nr == 2)
 587                data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
 588        else
 589                data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
 590
 591        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 592                                  data->temp11[nr] >> 8);
 593        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 594                                  data->temp11[nr] & 0xff);
 595        mutex_unlock(&data->update_lock);
 596        return count;
 597}
 598
 599/*
 600 * Hysteresis register holds a relative value, while we want to present
 601 * an absolute to user-space
 602 */
 603static ssize_t show_temp2_crit_hyst(struct device *dev,
 604                                    struct device_attribute *dummy, char *buf)
 605{
 606        struct lm63_data *data = lm63_update_device(dev);
 607        return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
 608                       + data->temp2_offset
 609                       - TEMP8_FROM_REG(data->temp2_crit_hyst));
 610}
 611
 612static ssize_t show_lut_temp_hyst(struct device *dev,
 613                                  struct device_attribute *devattr, char *buf)
 614{
 615        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 616        struct lm63_data *data = lm63_update_device(dev);
 617
 618        return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
 619                       + data->temp2_offset
 620                       - TEMP8_FROM_REG(data->lut_temp_hyst));
 621}
 622
 623/*
 624 * And now the other way around, user-space provides an absolute
 625 * hysteresis value and we have to store a relative one
 626 */
 627static ssize_t set_temp2_crit_hyst(struct device *dev,
 628                                   struct device_attribute *dummy,
 629                                   const char *buf, size_t count)
 630{
 631        struct lm63_data *data = dev_get_drvdata(dev);
 632        struct i2c_client *client = data->client;
 633        long val;
 634        int err;
 635        long hyst;
 636
 637        err = kstrtol(buf, 10, &val);
 638        if (err)
 639                return err;
 640
 641        mutex_lock(&data->update_lock);
 642        hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
 643        i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 644                                  HYST_TO_REG(hyst));
 645        mutex_unlock(&data->update_lock);
 646        return count;
 647}
 648
 649/*
 650 * Set conversion rate.
 651 * client->update_lock must be held when calling this function.
 652 */
 653static void lm63_set_convrate(struct lm63_data *data, unsigned int interval)
 654{
 655        struct i2c_client *client = data->client;
 656        unsigned int update_interval;
 657        int i;
 658
 659        /* Shift calculations to avoid rounding errors */
 660        interval <<= 6;
 661
 662        /* find the nearest update rate */
 663        update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
 664          / data->max_convrate_hz;
 665        for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
 666                if (interval >= update_interval * 3 / 4)
 667                        break;
 668
 669        i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
 670        data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
 671}
 672
 673static ssize_t show_update_interval(struct device *dev,
 674                                    struct device_attribute *attr, char *buf)
 675{
 676        struct lm63_data *data = dev_get_drvdata(dev);
 677
 678        return sprintf(buf, "%u\n", data->update_interval);
 679}
 680
 681static ssize_t set_update_interval(struct device *dev,
 682                                   struct device_attribute *attr,
 683                                   const char *buf, size_t count)
 684{
 685        struct lm63_data *data = dev_get_drvdata(dev);
 686        unsigned long val;
 687        int err;
 688
 689        err = kstrtoul(buf, 10, &val);
 690        if (err)
 691                return err;
 692
 693        mutex_lock(&data->update_lock);
 694        lm63_set_convrate(data, clamp_val(val, 0, 100000));
 695        mutex_unlock(&data->update_lock);
 696
 697        return count;
 698}
 699
 700static ssize_t show_type(struct device *dev, struct device_attribute *attr,
 701                         char *buf)
 702{
 703        struct lm63_data *data = dev_get_drvdata(dev);
 704
 705        return sprintf(buf, data->trutherm ? "1\n" : "2\n");
 706}
 707
 708static ssize_t set_type(struct device *dev, struct device_attribute *attr,
 709                        const char *buf, size_t count)
 710{
 711        struct lm63_data *data = dev_get_drvdata(dev);
 712        struct i2c_client *client = data->client;
 713        unsigned long val;
 714        int ret;
 715        u8 reg;
 716
 717        ret = kstrtoul(buf, 10, &val);
 718        if (ret < 0)
 719                return ret;
 720        if (val != 1 && val != 2)
 721                return -EINVAL;
 722
 723        mutex_lock(&data->update_lock);
 724        data->trutherm = val == 1;
 725        reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
 726        i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
 727                                  reg | (data->trutherm ? 0x02 : 0x00));
 728        data->valid = 0;
 729        mutex_unlock(&data->update_lock);
 730
 731        return count;
 732}
 733
 734static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 735                           char *buf)
 736{
 737        struct lm63_data *data = lm63_update_device(dev);
 738        return sprintf(buf, "%u\n", data->alarms);
 739}
 740
 741static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 742                          char *buf)
 743{
 744        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 745        struct lm63_data *data = lm63_update_device(dev);
 746        int bitnr = attr->index;
 747
 748        return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 749}
 750
 751static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 752static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 753        set_fan, 1);
 754
 755static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
 756static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
 757        show_pwm1_enable, set_pwm1_enable);
 758static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
 759        show_pwm1, set_pwm1, 1);
 760static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
 761        show_lut_temp, set_temp8, 3);
 762static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
 763        show_lut_temp_hyst, NULL, 3);
 764static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
 765        show_pwm1, set_pwm1, 2);
 766static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
 767        show_lut_temp, set_temp8, 4);
 768static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
 769        show_lut_temp_hyst, NULL, 4);
 770static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
 771        show_pwm1, set_pwm1, 3);
 772static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
 773        show_lut_temp, set_temp8, 5);
 774static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
 775        show_lut_temp_hyst, NULL, 5);
 776static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
 777        show_pwm1, set_pwm1, 4);
 778static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
 779        show_lut_temp, set_temp8, 6);
 780static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
 781        show_lut_temp_hyst, NULL, 6);
 782static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
 783        show_pwm1, set_pwm1, 5);
 784static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
 785        show_lut_temp, set_temp8, 7);
 786static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
 787        show_lut_temp_hyst, NULL, 7);
 788static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
 789        show_pwm1, set_pwm1, 6);
 790static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
 791        show_lut_temp, set_temp8, 8);
 792static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
 793        show_lut_temp_hyst, NULL, 8);
 794static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
 795        show_pwm1, set_pwm1, 7);
 796static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
 797        show_lut_temp, set_temp8, 9);
 798static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
 799        show_lut_temp_hyst, NULL, 9);
 800static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
 801        show_pwm1, set_pwm1, 8);
 802static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
 803        show_lut_temp, set_temp8, 10);
 804static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
 805        show_lut_temp_hyst, NULL, 10);
 806static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
 807        show_pwm1, set_pwm1, 9);
 808static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
 809        show_lut_temp, set_temp8, 11);
 810static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
 811        show_lut_temp_hyst, NULL, 11);
 812static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
 813        show_pwm1, set_pwm1, 10);
 814static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
 815        show_lut_temp, set_temp8, 12);
 816static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
 817        show_lut_temp_hyst, NULL, 12);
 818static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
 819        show_pwm1, set_pwm1, 11);
 820static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
 821        show_lut_temp, set_temp8, 13);
 822static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
 823        show_lut_temp_hyst, NULL, 13);
 824static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
 825        show_pwm1, set_pwm1, 12);
 826static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
 827        show_lut_temp, set_temp8, 14);
 828static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
 829        show_lut_temp_hyst, NULL, 14);
 830
 831static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
 832static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
 833        set_temp8, 1);
 834
 835static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 836static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 837        set_temp11, 1);
 838static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 839        set_temp11, 2);
 840static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
 841        set_temp11, 3);
 842static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
 843        set_temp8, 2);
 844static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 845        set_temp2_crit_hyst);
 846
 847static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type);
 848
 849/* Individual alarm files */
 850static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 851static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 852static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 853static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 854static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 855static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 856/* Raw alarm file for compatibility */
 857static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 858
 859static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
 860                   set_update_interval);
 861
 862static struct attribute *lm63_attributes[] = {
 863        &sensor_dev_attr_pwm1.dev_attr.attr,
 864        &dev_attr_pwm1_enable.attr,
 865        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
 866        &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
 867        &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
 868        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
 869        &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
 870        &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
 871        &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
 872        &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
 873        &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
 874        &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
 875        &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
 876        &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
 877        &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
 878        &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
 879        &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
 880        &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
 881        &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
 882        &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
 883        &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
 884        &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
 885        &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
 886        &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
 887        &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
 888        &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
 889
 890        &sensor_dev_attr_temp1_input.dev_attr.attr,
 891        &sensor_dev_attr_temp2_input.dev_attr.attr,
 892        &sensor_dev_attr_temp2_min.dev_attr.attr,
 893        &sensor_dev_attr_temp1_max.dev_attr.attr,
 894        &sensor_dev_attr_temp2_max.dev_attr.attr,
 895        &sensor_dev_attr_temp2_offset.dev_attr.attr,
 896        &sensor_dev_attr_temp2_crit.dev_attr.attr,
 897        &dev_attr_temp2_crit_hyst.attr,
 898
 899        &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 900        &sensor_dev_attr_temp2_fault.dev_attr.attr,
 901        &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 902        &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 903        &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 904        &dev_attr_alarms.attr,
 905        &dev_attr_update_interval.attr,
 906        NULL
 907};
 908
 909static struct attribute *lm63_attributes_temp2_type[] = {
 910        &dev_attr_temp2_type.attr,
 911        NULL
 912};
 913
 914static const struct attribute_group lm63_group_temp2_type = {
 915        .attrs = lm63_attributes_temp2_type,
 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 lm63_data *data = dev_get_drvdata(dev);
 950
 951        if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
 952            && (data->kind == lm64 ||
 953                (data->kind == lm96163 && (data->config & 0x02))))
 954                return attr->mode | S_IWUSR;
 955
 956        return attr->mode;
 957}
 958
 959static const struct attribute_group lm63_group = {
 960        .is_visible = lm63_attribute_mode,
 961        .attrs = lm63_attributes,
 962};
 963
 964static struct attribute *lm63_attributes_fan1[] = {
 965        &sensor_dev_attr_fan1_input.dev_attr.attr,
 966        &sensor_dev_attr_fan1_min.dev_attr.attr,
 967
 968        &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 969        NULL
 970};
 971
 972static const struct attribute_group lm63_group_fan1 = {
 973        .attrs = lm63_attributes_fan1,
 974};
 975
 976/*
 977 * Real code
 978 */
 979
 980/* Return 0 if detection is successful, -ENODEV otherwise */
 981static int lm63_detect(struct i2c_client *client,
 982                       struct i2c_board_info *info)
 983{
 984        struct i2c_adapter *adapter = client->adapter;
 985        u8 man_id, chip_id, reg_config1, reg_config2;
 986        u8 reg_alert_status, reg_alert_mask;
 987        int address = client->addr;
 988
 989        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 990                return -ENODEV;
 991
 992        man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
 993        chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
 994
 995        reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 996        reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
 997        reg_alert_status = i2c_smbus_read_byte_data(client,
 998                           LM63_REG_ALERT_STATUS);
 999        reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
1000
1001        if (man_id != 0x01 /* National Semiconductor */
1002         || (reg_config1 & 0x18) != 0x00
1003         || (reg_config2 & 0xF8) != 0x00
1004         || (reg_alert_status & 0x20) != 0x00
1005         || (reg_alert_mask & 0xA4) != 0xA4) {
1006                dev_dbg(&adapter->dev,
1007                        "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
1008                        man_id, chip_id);
1009                return -ENODEV;
1010        }
1011
1012        if (chip_id == 0x41 && address == 0x4c)
1013                strlcpy(info->type, "lm63", I2C_NAME_SIZE);
1014        else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
1015                strlcpy(info->type, "lm64", I2C_NAME_SIZE);
1016        else if (chip_id == 0x49 && address == 0x4c)
1017                strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
1018        else
1019                return -ENODEV;
1020
1021        return 0;
1022}
1023
1024/*
1025 * Ideally we shouldn't have to initialize anything, since the BIOS
1026 * should have taken care of everything
1027 */
1028static void lm63_init_client(struct lm63_data *data)
1029{
1030        struct i2c_client *client = data->client;
1031        struct device *dev = &client->dev;
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(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(dev, "Alert/tach pin configured for %s\n",
1094                        (data->config & 0x04) ? "tachometer input" :
1095                        "alert output");
1096        dev_dbg(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(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 device *dev = &client->dev;
1108        struct device *hwmon_dev;
1109        struct lm63_data *data;
1110        int groups = 0;
1111
1112        data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL);
1113        if (!data)
1114                return -ENOMEM;
1115
1116        data->client = client;
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(data);
1126
1127        /* Register sysfs hooks */
1128        data->groups[groups++] = &lm63_group;
1129        if (data->config & 0x04)        /* tachometer enabled */
1130                data->groups[groups++] = &lm63_group_fan1;
1131
1132        if (data->kind == lm96163) {
1133                data->groups[groups++] = &lm63_group_temp2_type;
1134                data->groups[groups++] = &lm63_group_extra_lut;
1135        }
1136
1137        hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1138                                                           data, data->groups);
1139        return PTR_ERR_OR_ZERO(hwmon_dev);
1140}
1141
1142/*
1143 * Driver data (common to all clients)
1144 */
1145
1146static const struct i2c_device_id lm63_id[] = {
1147        { "lm63", lm63 },
1148        { "lm64", lm64 },
1149        { "lm96163", lm96163 },
1150        { }
1151};
1152MODULE_DEVICE_TABLE(i2c, lm63_id);
1153
1154static struct i2c_driver lm63_driver = {
1155        .class          = I2C_CLASS_HWMON,
1156        .driver = {
1157                .name   = "lm63",
1158        },
1159        .probe          = lm63_probe,
1160        .id_table       = lm63_id,
1161        .detect         = lm63_detect,
1162        .address_list   = normal_i2c,
1163};
1164
1165module_i2c_driver(lm63_driver);
1166
1167MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1168MODULE_DESCRIPTION("LM63 driver");
1169MODULE_LICENSE("GPL");
1170