LXR linux/drivers/hwmon/pmbus/pmbus.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * pmbus.h - Common defines and structures for PMBus devices
   4 *
   5 * Copyright (c) 2010, 2011 Ericsson AB.
   6 * Copyright (c) 2012 Guenter Roeck
   7 */
   8
   9#ifndef PMBUS_H
  10#define PMBUS_H
  11
  12#include <linux/bitops.h>
  13#include <linux/regulator/driver.h>
  14
  15/*
  16 * Registers
  17 */
  18enum pmbus_regs {
  19        PMBUS_PAGE                      = 0x00,
  20        PMBUS_OPERATION                 = 0x01,
  21        PMBUS_ON_OFF_CONFIG             = 0x02,
  22        PMBUS_CLEAR_FAULTS              = 0x03,
  23        PMBUS_PHASE                     = 0x04,
  24
  25        PMBUS_WRITE_PROTECT             = 0x10,
  26
  27        PMBUS_CAPABILITY                = 0x19,
  28        PMBUS_QUERY                     = 0x1A,
  29
  30        PMBUS_VOUT_MODE                 = 0x20,
  31        PMBUS_VOUT_COMMAND              = 0x21,
  32        PMBUS_VOUT_TRIM                 = 0x22,
  33        PMBUS_VOUT_CAL_OFFSET           = 0x23,
  34        PMBUS_VOUT_MAX                  = 0x24,
  35        PMBUS_VOUT_MARGIN_HIGH          = 0x25,
  36        PMBUS_VOUT_MARGIN_LOW           = 0x26,
  37        PMBUS_VOUT_TRANSITION_RATE      = 0x27,
  38        PMBUS_VOUT_DROOP                = 0x28,
  39        PMBUS_VOUT_SCALE_LOOP           = 0x29,
  40        PMBUS_VOUT_SCALE_MONITOR        = 0x2A,
  41
  42        PMBUS_COEFFICIENTS              = 0x30,
  43        PMBUS_POUT_MAX                  = 0x31,
  44
  45        PMBUS_FAN_CONFIG_12             = 0x3A,
  46        PMBUS_FAN_COMMAND_1             = 0x3B,
  47        PMBUS_FAN_COMMAND_2             = 0x3C,
  48        PMBUS_FAN_CONFIG_34             = 0x3D,
  49        PMBUS_FAN_COMMAND_3             = 0x3E,
  50        PMBUS_FAN_COMMAND_4             = 0x3F,
  51
  52        PMBUS_VOUT_OV_FAULT_LIMIT       = 0x40,
  53        PMBUS_VOUT_OV_FAULT_RESPONSE    = 0x41,
  54        PMBUS_VOUT_OV_WARN_LIMIT        = 0x42,
  55        PMBUS_VOUT_UV_WARN_LIMIT        = 0x43,
  56        PMBUS_VOUT_UV_FAULT_LIMIT       = 0x44,
  57        PMBUS_VOUT_UV_FAULT_RESPONSE    = 0x45,
  58        PMBUS_IOUT_OC_FAULT_LIMIT       = 0x46,
  59        PMBUS_IOUT_OC_FAULT_RESPONSE    = 0x47,
  60        PMBUS_IOUT_OC_LV_FAULT_LIMIT    = 0x48,
  61        PMBUS_IOUT_OC_LV_FAULT_RESPONSE = 0x49,
  62        PMBUS_IOUT_OC_WARN_LIMIT        = 0x4A,
  63        PMBUS_IOUT_UC_FAULT_LIMIT       = 0x4B,
  64        PMBUS_IOUT_UC_FAULT_RESPONSE    = 0x4C,
  65
  66        PMBUS_OT_FAULT_LIMIT            = 0x4F,
  67        PMBUS_OT_FAULT_RESPONSE         = 0x50,
  68        PMBUS_OT_WARN_LIMIT             = 0x51,
  69        PMBUS_UT_WARN_LIMIT             = 0x52,
  70        PMBUS_UT_FAULT_LIMIT            = 0x53,
  71        PMBUS_UT_FAULT_RESPONSE         = 0x54,
  72        PMBUS_VIN_OV_FAULT_LIMIT        = 0x55,
  73        PMBUS_VIN_OV_FAULT_RESPONSE     = 0x56,
  74        PMBUS_VIN_OV_WARN_LIMIT         = 0x57,
  75        PMBUS_VIN_UV_WARN_LIMIT         = 0x58,
  76        PMBUS_VIN_UV_FAULT_LIMIT        = 0x59,
  77
  78        PMBUS_IIN_OC_FAULT_LIMIT        = 0x5B,
  79        PMBUS_IIN_OC_WARN_LIMIT         = 0x5D,
  80
  81        PMBUS_POUT_OP_FAULT_LIMIT       = 0x68,
  82        PMBUS_POUT_OP_WARN_LIMIT        = 0x6A,
  83        PMBUS_PIN_OP_WARN_LIMIT         = 0x6B,
  84
  85        PMBUS_STATUS_BYTE               = 0x78,
  86        PMBUS_STATUS_WORD               = 0x79,
  87        PMBUS_STATUS_VOUT               = 0x7A,
  88        PMBUS_STATUS_IOUT               = 0x7B,
  89        PMBUS_STATUS_INPUT              = 0x7C,
  90        PMBUS_STATUS_TEMPERATURE        = 0x7D,
  91        PMBUS_STATUS_CML                = 0x7E,
  92        PMBUS_STATUS_OTHER              = 0x7F,
  93        PMBUS_STATUS_MFR_SPECIFIC       = 0x80,
  94        PMBUS_STATUS_FAN_12             = 0x81,
  95        PMBUS_STATUS_FAN_34             = 0x82,
  96
  97        PMBUS_READ_VIN                  = 0x88,
  98        PMBUS_READ_IIN                  = 0x89,
  99        PMBUS_READ_VCAP                 = 0x8A,
 100        PMBUS_READ_VOUT                 = 0x8B,
 101        PMBUS_READ_IOUT                 = 0x8C,
 102        PMBUS_READ_TEMPERATURE_1        = 0x8D,
 103        PMBUS_READ_TEMPERATURE_2        = 0x8E,
 104        PMBUS_READ_TEMPERATURE_3        = 0x8F,
 105        PMBUS_READ_FAN_SPEED_1          = 0x90,
 106        PMBUS_READ_FAN_SPEED_2          = 0x91,
 107        PMBUS_READ_FAN_SPEED_3          = 0x92,
 108        PMBUS_READ_FAN_SPEED_4          = 0x93,
 109        PMBUS_READ_DUTY_CYCLE           = 0x94,
 110        PMBUS_READ_FREQUENCY            = 0x95,
 111        PMBUS_READ_POUT                 = 0x96,
 112        PMBUS_READ_PIN                  = 0x97,
 113
 114        PMBUS_REVISION                  = 0x98,
 115        PMBUS_MFR_ID                    = 0x99,
 116        PMBUS_MFR_MODEL                 = 0x9A,
 117        PMBUS_MFR_REVISION              = 0x9B,
 118        PMBUS_MFR_LOCATION              = 0x9C,
 119        PMBUS_MFR_DATE                  = 0x9D,
 120        PMBUS_MFR_SERIAL                = 0x9E,
 121
 122        PMBUS_MFR_VIN_MIN               = 0xA0,
 123        PMBUS_MFR_VIN_MAX               = 0xA1,
 124        PMBUS_MFR_IIN_MAX               = 0xA2,
 125        PMBUS_MFR_PIN_MAX               = 0xA3,
 126        PMBUS_MFR_VOUT_MIN              = 0xA4,
 127        PMBUS_MFR_VOUT_MAX              = 0xA5,
 128        PMBUS_MFR_IOUT_MAX              = 0xA6,
 129        PMBUS_MFR_POUT_MAX              = 0xA7,
 130
 131        PMBUS_IC_DEVICE_ID              = 0xAD,
 132        PMBUS_IC_DEVICE_REV             = 0xAE,
 133
 134        PMBUS_MFR_MAX_TEMP_1            = 0xC0,
 135        PMBUS_MFR_MAX_TEMP_2            = 0xC1,
 136        PMBUS_MFR_MAX_TEMP_3            = 0xC2,
 137
 138/*
 139 * Virtual registers.
 140 * Useful to support attributes which are not supported by standard PMBus
 141 * registers but exist as manufacturer specific registers on individual chips.
 142 * Must be mapped to real registers in device specific code.
 143 *
 144 * Semantics:
 145 * Virtual registers are all word size.
 146 * READ registers are read-only; writes are either ignored or return an error.
 147 * RESET registers are read/write. Reading reset registers returns zero
 148 * (used for detection), writing any value causes the associated history to be
 149 * reset.
 150 * Virtual registers have to be handled in device specific driver code. Chip
 151 * driver code returns non-negative register values if a virtual register is
 152 * supported, or a negative error code if not. The chip driver may return
 153 * -ENODATA or any other error code in this case, though an error code other
 154 * than -ENODATA is handled more efficiently and thus preferred. Either case,
 155 * the calling PMBus core code will abort if the chip driver returns an error
 156 * code when reading or writing virtual registers.
 157 */
 158        PMBUS_VIRT_BASE                 = 0x100,
 159        PMBUS_VIRT_READ_TEMP_AVG,
 160        PMBUS_VIRT_READ_TEMP_MIN,
 161        PMBUS_VIRT_READ_TEMP_MAX,
 162        PMBUS_VIRT_RESET_TEMP_HISTORY,
 163        PMBUS_VIRT_READ_VIN_AVG,
 164        PMBUS_VIRT_READ_VIN_MIN,
 165        PMBUS_VIRT_READ_VIN_MAX,
 166        PMBUS_VIRT_RESET_VIN_HISTORY,
 167        PMBUS_VIRT_READ_IIN_AVG,
 168        PMBUS_VIRT_READ_IIN_MIN,
 169        PMBUS_VIRT_READ_IIN_MAX,
 170        PMBUS_VIRT_RESET_IIN_HISTORY,
 171        PMBUS_VIRT_READ_PIN_AVG,
 172        PMBUS_VIRT_READ_PIN_MIN,
 173        PMBUS_VIRT_READ_PIN_MAX,
 174        PMBUS_VIRT_RESET_PIN_HISTORY,
 175        PMBUS_VIRT_READ_POUT_AVG,
 176        PMBUS_VIRT_READ_POUT_MIN,
 177        PMBUS_VIRT_READ_POUT_MAX,
 178        PMBUS_VIRT_RESET_POUT_HISTORY,
 179        PMBUS_VIRT_READ_VOUT_AVG,
 180        PMBUS_VIRT_READ_VOUT_MIN,
 181        PMBUS_VIRT_READ_VOUT_MAX,
 182        PMBUS_VIRT_RESET_VOUT_HISTORY,
 183        PMBUS_VIRT_READ_IOUT_AVG,
 184        PMBUS_VIRT_READ_IOUT_MIN,
 185        PMBUS_VIRT_READ_IOUT_MAX,
 186        PMBUS_VIRT_RESET_IOUT_HISTORY,
 187        PMBUS_VIRT_READ_TEMP2_AVG,
 188        PMBUS_VIRT_READ_TEMP2_MIN,
 189        PMBUS_VIRT_READ_TEMP2_MAX,
 190        PMBUS_VIRT_RESET_TEMP2_HISTORY,
 191
 192        PMBUS_VIRT_READ_VMON,
 193        PMBUS_VIRT_VMON_UV_WARN_LIMIT,
 194        PMBUS_VIRT_VMON_OV_WARN_LIMIT,
 195        PMBUS_VIRT_VMON_UV_FAULT_LIMIT,
 196        PMBUS_VIRT_VMON_OV_FAULT_LIMIT,
 197        PMBUS_VIRT_STATUS_VMON,
 198
 199        /*
 200         * RPM and PWM Fan control
 201         *
 202         * Drivers wanting to expose PWM control must define the behaviour of
 203         * PMBUS_VIRT_PWM_[1-4] and PMBUS_VIRT_PWM_ENABLE_[1-4] in the
 204         * {read,write}_word_data callback.
 205         *
 206         * pmbus core provides a default implementation for
 207         * PMBUS_VIRT_FAN_TARGET_[1-4].
 208         *
 209         * TARGET, PWM and PWM_ENABLE members must be defined sequentially;
 210         * pmbus core uses the difference between the provided register and
 211         * it's _1 counterpart to calculate the FAN/PWM ID.
 212         */
 213        PMBUS_VIRT_FAN_TARGET_1,
 214        PMBUS_VIRT_FAN_TARGET_2,
 215        PMBUS_VIRT_FAN_TARGET_3,
 216        PMBUS_VIRT_FAN_TARGET_4,
 217        PMBUS_VIRT_PWM_1,
 218        PMBUS_VIRT_PWM_2,
 219        PMBUS_VIRT_PWM_3,
 220        PMBUS_VIRT_PWM_4,
 221        PMBUS_VIRT_PWM_ENABLE_1,
 222        PMBUS_VIRT_PWM_ENABLE_2,
 223        PMBUS_VIRT_PWM_ENABLE_3,
 224        PMBUS_VIRT_PWM_ENABLE_4,
 225
 226        /* Samples for average
 227         *
 228         * Drivers wanting to expose functionality for changing the number of
 229         * samples used for average values should implement support in
 230         * {read,write}_word_data callback for either PMBUS_VIRT_SAMPLES if it
 231         * applies to all types of measurements, or any number of specific
 232         * PMBUS_VIRT_*_SAMPLES registers to allow for individual control.
 233         */
 234        PMBUS_VIRT_SAMPLES,
 235        PMBUS_VIRT_IN_SAMPLES,
 236        PMBUS_VIRT_CURR_SAMPLES,
 237        PMBUS_VIRT_POWER_SAMPLES,
 238        PMBUS_VIRT_TEMP_SAMPLES,
 239};
 240
 241/*
 242 * OPERATION
 243 */
 244#define PB_OPERATION_CONTROL_ON         BIT(7)
 245
 246/*
 247 * WRITE_PROTECT
 248 */
 249#define PB_WP_ALL       BIT(7)  /* all but WRITE_PROTECT */
 250#define PB_WP_OP        BIT(6)  /* all but WP, OPERATION, PAGE */
 251#define PB_WP_VOUT      BIT(5)  /* all but WP, OPERATION, PAGE, VOUT, ON_OFF */
 252
 253#define PB_WP_ANY       (PB_WP_ALL | PB_WP_OP | PB_WP_VOUT)
 254
 255/*
 256 * CAPABILITY
 257 */
 258#define PB_CAPABILITY_SMBALERT          BIT(4)
 259#define PB_CAPABILITY_ERROR_CHECK       BIT(7)
 260
 261/*
 262 * VOUT_MODE
 263 */
 264#define PB_VOUT_MODE_MODE_MASK          0xe0
 265#define PB_VOUT_MODE_PARAM_MASK         0x1f
 266
 267#define PB_VOUT_MODE_LINEAR             0x00
 268#define PB_VOUT_MODE_VID                0x20
 269#define PB_VOUT_MODE_DIRECT             0x40
 270
 271/*
 272 * Fan configuration
 273 */
 274#define PB_FAN_2_PULSE_MASK             (BIT(0) | BIT(1))
 275#define PB_FAN_2_RPM                    BIT(2)
 276#define PB_FAN_2_INSTALLED              BIT(3)
 277#define PB_FAN_1_PULSE_MASK             (BIT(4) | BIT(5))
 278#define PB_FAN_1_RPM                    BIT(6)
 279#define PB_FAN_1_INSTALLED              BIT(7)
 280
 281enum pmbus_fan_mode { percent = 0, rpm };
 282
 283/*
 284 * STATUS_BYTE, STATUS_WORD (lower)
 285 */
 286#define PB_STATUS_NONE_ABOVE            BIT(0)
 287#define PB_STATUS_CML                   BIT(1)
 288#define PB_STATUS_TEMPERATURE           BIT(2)
 289#define PB_STATUS_VIN_UV                BIT(3)
 290#define PB_STATUS_IOUT_OC               BIT(4)
 291#define PB_STATUS_VOUT_OV               BIT(5)
 292#define PB_STATUS_OFF                   BIT(6)
 293#define PB_STATUS_BUSY                  BIT(7)
 294
 295/*
 296 * STATUS_WORD (upper)
 297 */
 298#define PB_STATUS_UNKNOWN               BIT(8)
 299#define PB_STATUS_OTHER                 BIT(9)
 300#define PB_STATUS_FANS                  BIT(10)
 301#define PB_STATUS_POWER_GOOD_N          BIT(11)
 302#define PB_STATUS_WORD_MFR              BIT(12)
 303#define PB_STATUS_INPUT                 BIT(13)
 304#define PB_STATUS_IOUT_POUT             BIT(14)
 305#define PB_STATUS_VOUT                  BIT(15)
 306
 307/*
 308 * STATUS_IOUT
 309 */
 310#define PB_POUT_OP_WARNING              BIT(0)
 311#define PB_POUT_OP_FAULT                BIT(1)
 312#define PB_POWER_LIMITING               BIT(2)
 313#define PB_CURRENT_SHARE_FAULT          BIT(3)
 314#define PB_IOUT_UC_FAULT                BIT(4)
 315#define PB_IOUT_OC_WARNING              BIT(5)
 316#define PB_IOUT_OC_LV_FAULT             BIT(6)
 317#define PB_IOUT_OC_FAULT                BIT(7)
 318
 319/*
 320 * STATUS_VOUT, STATUS_INPUT
 321 */
 322#define PB_VOLTAGE_UV_FAULT             BIT(4)
 323#define PB_VOLTAGE_UV_WARNING           BIT(5)
 324#define PB_VOLTAGE_OV_WARNING           BIT(6)
 325#define PB_VOLTAGE_OV_FAULT             BIT(7)
 326
 327/*
 328 * STATUS_INPUT
 329 */
 330#define PB_PIN_OP_WARNING               BIT(0)
 331#define PB_IIN_OC_WARNING               BIT(1)
 332#define PB_IIN_OC_FAULT                 BIT(2)
 333
 334/*
 335 * STATUS_TEMPERATURE
 336 */
 337#define PB_TEMP_UT_FAULT                BIT(4)
 338#define PB_TEMP_UT_WARNING              BIT(5)
 339#define PB_TEMP_OT_WARNING              BIT(6)
 340#define PB_TEMP_OT_FAULT                BIT(7)
 341
 342/*
 343 * STATUS_FAN
 344 */
 345#define PB_FAN_AIRFLOW_WARNING          BIT(0)
 346#define PB_FAN_AIRFLOW_FAULT            BIT(1)
 347#define PB_FAN_FAN2_SPEED_OVERRIDE      BIT(2)
 348#define PB_FAN_FAN1_SPEED_OVERRIDE      BIT(3)
 349#define PB_FAN_FAN2_WARNING             BIT(4)
 350#define PB_FAN_FAN1_WARNING             BIT(5)
 351#define PB_FAN_FAN2_FAULT               BIT(6)
 352#define PB_FAN_FAN1_FAULT               BIT(7)
 353
 354/*
 355 * CML_FAULT_STATUS
 356 */
 357#define PB_CML_FAULT_OTHER_MEM_LOGIC    BIT(0)
 358#define PB_CML_FAULT_OTHER_COMM         BIT(1)
 359#define PB_CML_FAULT_PROCESSOR          BIT(3)
 360#define PB_CML_FAULT_MEMORY             BIT(4)
 361#define PB_CML_FAULT_PACKET_ERROR       BIT(5)
 362#define PB_CML_FAULT_INVALID_DATA       BIT(6)
 363#define PB_CML_FAULT_INVALID_COMMAND    BIT(7)
 364
 365enum pmbus_sensor_classes {
 366        PSC_VOLTAGE_IN = 0,
 367        PSC_VOLTAGE_OUT,
 368        PSC_CURRENT_IN,
 369        PSC_CURRENT_OUT,
 370        PSC_POWER,
 371        PSC_TEMPERATURE,
 372        PSC_FAN,
 373        PSC_PWM,
 374        PSC_NUM_CLASSES         /* Number of power sensor classes */
 375};
 376
 377#define PMBUS_PAGES     32      /* Per PMBus specification */
 378#define PMBUS_PHASES    10      /* Maximum number of phases per page */
 379
 380/* Functionality bit mask */
 381#define PMBUS_HAVE_VIN          BIT(0)
 382#define PMBUS_HAVE_VCAP         BIT(1)
 383#define PMBUS_HAVE_VOUT         BIT(2)
 384#define PMBUS_HAVE_IIN          BIT(3)
 385#define PMBUS_HAVE_IOUT         BIT(4)
 386#define PMBUS_HAVE_PIN          BIT(5)
 387#define PMBUS_HAVE_POUT         BIT(6)
 388#define PMBUS_HAVE_FAN12        BIT(7)
 389#define PMBUS_HAVE_FAN34        BIT(8)
 390#define PMBUS_HAVE_TEMP         BIT(9)
 391#define PMBUS_HAVE_TEMP2        BIT(10)
 392#define PMBUS_HAVE_TEMP3        BIT(11)
 393#define PMBUS_HAVE_STATUS_VOUT  BIT(12)
 394#define PMBUS_HAVE_STATUS_IOUT  BIT(13)
 395#define PMBUS_HAVE_STATUS_INPUT BIT(14)
 396#define PMBUS_HAVE_STATUS_TEMP  BIT(15)
 397#define PMBUS_HAVE_STATUS_FAN12 BIT(16)
 398#define PMBUS_HAVE_STATUS_FAN34 BIT(17)
 399#define PMBUS_HAVE_VMON         BIT(18)
 400#define PMBUS_HAVE_STATUS_VMON  BIT(19)
 401#define PMBUS_HAVE_PWM12        BIT(20)
 402#define PMBUS_HAVE_PWM34        BIT(21)
 403#define PMBUS_HAVE_SAMPLES      BIT(22)
 404
 405#define PMBUS_PHASE_VIRTUAL     BIT(30) /* Phases on this page are virtual */
 406#define PMBUS_PAGE_VIRTUAL      BIT(31) /* Page is virtual */
 407
 408enum pmbus_data_format { linear = 0, direct, vid };
 409enum vrm_version { vr11 = 0, vr12, vr13, imvp9, amd625mv };
 410
 411struct pmbus_driver_info {
 412        int pages;              /* Total number of pages */
 413        u8 phases[PMBUS_PAGES]; /* Number of phases per page */
 414        enum pmbus_data_format format[PSC_NUM_CLASSES];
 415        enum vrm_version vrm_version[PMBUS_PAGES]; /* vrm version per page */
 416        /*
 417         * Support one set of coefficients for each sensor type
 418         * Used for chips providing data in direct mode.
 419         */
 420        int m[PSC_NUM_CLASSES]; /* mantissa for direct data format */
 421        int b[PSC_NUM_CLASSES]; /* offset */
 422        int R[PSC_NUM_CLASSES]; /* exponent */
 423
 424        u32 func[PMBUS_PAGES];  /* Functionality, per page */
 425        u32 pfunc[PMBUS_PHASES];/* Functionality, per phase */
 426        /*
 427         * The following functions map manufacturing specific register values
 428         * to PMBus standard register values. Specify only if mapping is
 429         * necessary.
 430         * Functions return the register value (read) or zero (write) if
 431         * successful. A return value of -ENODATA indicates that there is no
 432         * manufacturer specific register, but that a standard PMBus register
 433         * may exist. Any other negative return value indicates that the
 434         * register does not exist, and that no attempt should be made to read
 435         * the standard register.
 436         */
 437        int (*read_byte_data)(struct i2c_client *client, int page, int reg);
 438        int (*read_word_data)(struct i2c_client *client, int page, int phase,
 439                              int reg);
 440        int (*write_word_data)(struct i2c_client *client, int page, int reg,
 441                               u16 word);
 442        int (*write_byte)(struct i2c_client *client, int page, u8 value);
 443        /*
 444         * The identify function determines supported PMBus functionality.
 445         * This function is only necessary if a chip driver supports multiple
 446         * chips, and the chip functionality is not pre-determined.
 447         */
 448        int (*identify)(struct i2c_client *client,
 449                        struct pmbus_driver_info *info);
 450
 451        /* Regulator functionality, if supported by this chip driver. */
 452        int num_regulators;
 453        const struct regulator_desc *reg_desc;
 454
 455        /* custom attributes */
 456        const struct attribute_group **groups;
 457};
 458
 459/* Regulator ops */
 460
 461extern const struct regulator_ops pmbus_regulator_ops;
 462
 463/* Macro for filling in array of struct regulator_desc */
 464#define PMBUS_REGULATOR(_name, _id)                             \
 465        [_id] = {                                               \
 466                .name = (_name # _id),                          \
 467                .id = (_id),                                    \
 468                .of_match = of_match_ptr(_name # _id),          \
 469                .regulators_node = of_match_ptr("regulators"),  \
 470                .ops = &pmbus_regulator_ops,                    \
 471                .type = REGULATOR_VOLTAGE,                      \
 472                .owner = THIS_MODULE,                           \
 473        }
 474
 475/* Function declarations */
 476
 477void pmbus_clear_cache(struct i2c_client *client);
 478void pmbus_set_update(struct i2c_client *client, u8 reg, bool update);
 479int pmbus_set_page(struct i2c_client *client, int page, int phase);
 480int pmbus_read_word_data(struct i2c_client *client, int page, int phase,
 481                         u8 reg);
 482int pmbus_write_word_data(struct i2c_client *client, int page, u8 reg,
 483                          u16 word);
 484int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg);
 485int pmbus_write_byte(struct i2c_client *client, int page, u8 value);
 486int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg,
 487                          u8 value);
 488int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg,
 489                           u8 mask, u8 value);
 490void pmbus_clear_faults(struct i2c_client *client);
 491bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg);
 492bool pmbus_check_word_register(struct i2c_client *client, int page, int reg);
 493int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info);
 494const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client
 495                                                      *client);
 496int pmbus_get_fan_rate_device(struct i2c_client *client, int page, int id,
 497                              enum pmbus_fan_mode mode);
 498int pmbus_get_fan_rate_cached(struct i2c_client *client, int page, int id,
 499                              enum pmbus_fan_mode mode);
 500int pmbus_update_fan(struct i2c_client *client, int page, int id,
 501                     u8 config, u8 mask, u16 command);
 502struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client);
 503
 504#endif /* PMBUS_H */
 505