linux/include/linux/regmap.h
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   1/* SPDX-License-Identifier: GPL-2.0-only */
   2#ifndef __LINUX_REGMAP_H
   3#define __LINUX_REGMAP_H
   4
   5/*
   6 * Register map access API
   7 *
   8 * Copyright 2011 Wolfson Microelectronics plc
   9 *
  10 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  11 */
  12
  13#include <linux/list.h>
  14#include <linux/rbtree.h>
  15#include <linux/ktime.h>
  16#include <linux/delay.h>
  17#include <linux/err.h>
  18#include <linux/bug.h>
  19#include <linux/lockdep.h>
  20
  21struct module;
  22struct clk;
  23struct device;
  24struct i2c_client;
  25struct irq_domain;
  26struct slim_device;
  27struct spi_device;
  28struct spmi_device;
  29struct regmap;
  30struct regmap_range_cfg;
  31struct regmap_field;
  32struct snd_ac97;
  33struct sdw_slave;
  34
  35/* An enum of all the supported cache types */
  36enum regcache_type {
  37        REGCACHE_NONE,
  38        REGCACHE_RBTREE,
  39        REGCACHE_COMPRESSED,
  40        REGCACHE_FLAT,
  41};
  42
  43/**
  44 * struct reg_default - Default value for a register.
  45 *
  46 * @reg: Register address.
  47 * @def: Register default value.
  48 *
  49 * We use an array of structs rather than a simple array as many modern devices
  50 * have very sparse register maps.
  51 */
  52struct reg_default {
  53        unsigned int reg;
  54        unsigned int def;
  55};
  56
  57/**
  58 * struct reg_sequence - An individual write from a sequence of writes.
  59 *
  60 * @reg: Register address.
  61 * @def: Register value.
  62 * @delay_us: Delay to be applied after the register write in microseconds
  63 *
  64 * Register/value pairs for sequences of writes with an optional delay in
  65 * microseconds to be applied after each write.
  66 */
  67struct reg_sequence {
  68        unsigned int reg;
  69        unsigned int def;
  70        unsigned int delay_us;
  71};
  72
  73#define regmap_update_bits(map, reg, mask, val) \
  74        regmap_update_bits_base(map, reg, mask, val, NULL, false, false)
  75#define regmap_update_bits_async(map, reg, mask, val)\
  76        regmap_update_bits_base(map, reg, mask, val, NULL, true, false)
  77#define regmap_update_bits_check(map, reg, mask, val, change)\
  78        regmap_update_bits_base(map, reg, mask, val, change, false, false)
  79#define regmap_update_bits_check_async(map, reg, mask, val, change)\
  80        regmap_update_bits_base(map, reg, mask, val, change, true, false)
  81
  82#define regmap_write_bits(map, reg, mask, val) \
  83        regmap_update_bits_base(map, reg, mask, val, NULL, false, true)
  84
  85#define regmap_field_write(field, val) \
  86        regmap_field_update_bits_base(field, ~0, val, NULL, false, false)
  87#define regmap_field_force_write(field, val) \
  88        regmap_field_update_bits_base(field, ~0, val, NULL, false, true)
  89#define regmap_field_update_bits(field, mask, val)\
  90        regmap_field_update_bits_base(field, mask, val, NULL, false, false)
  91#define regmap_field_force_update_bits(field, mask, val) \
  92        regmap_field_update_bits_base(field, mask, val, NULL, false, true)
  93
  94#define regmap_fields_write(field, id, val) \
  95        regmap_fields_update_bits_base(field, id, ~0, val, NULL, false, false)
  96#define regmap_fields_force_write(field, id, val) \
  97        regmap_fields_update_bits_base(field, id, ~0, val, NULL, false, true)
  98#define regmap_fields_update_bits(field, id, mask, val)\
  99        regmap_fields_update_bits_base(field, id, mask, val, NULL, false, false)
 100#define regmap_fields_force_update_bits(field, id, mask, val) \
 101        regmap_fields_update_bits_base(field, id, mask, val, NULL, false, true)
 102
 103/**
 104 * regmap_read_poll_timeout - Poll until a condition is met or a timeout occurs
 105 *
 106 * @map: Regmap to read from
 107 * @addr: Address to poll
 108 * @val: Unsigned integer variable to read the value into
 109 * @cond: Break condition (usually involving @val)
 110 * @sleep_us: Maximum time to sleep between reads in us (0
 111 *            tight-loops).  Should be less than ~20ms since usleep_range
 112 *            is used (see Documentation/timers/timers-howto.txt).
 113 * @timeout_us: Timeout in us, 0 means never timeout
 114 *
 115 * Returns 0 on success and -ETIMEDOUT upon a timeout or the regmap_read
 116 * error return value in case of a error read. In the two former cases,
 117 * the last read value at @addr is stored in @val. Must not be called
 118 * from atomic context if sleep_us or timeout_us are used.
 119 *
 120 * This is modelled after the readx_poll_timeout macros in linux/iopoll.h.
 121 */
 122#define regmap_read_poll_timeout(map, addr, val, cond, sleep_us, timeout_us) \
 123({ \
 124        u64 __timeout_us = (timeout_us); \
 125        unsigned long __sleep_us = (sleep_us); \
 126        ktime_t __timeout = ktime_add_us(ktime_get(), __timeout_us); \
 127        int __ret; \
 128        might_sleep_if(__sleep_us); \
 129        for (;;) { \
 130                __ret = regmap_read((map), (addr), &(val)); \
 131                if (__ret) \
 132                        break; \
 133                if (cond) \
 134                        break; \
 135                if ((__timeout_us) && \
 136                    ktime_compare(ktime_get(), __timeout) > 0) { \
 137                        __ret = regmap_read((map), (addr), &(val)); \
 138                        break; \
 139                } \
 140                if (__sleep_us) \
 141                        usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
 142        } \
 143        __ret ?: ((cond) ? 0 : -ETIMEDOUT); \
 144})
 145
 146/**
 147 * regmap_field_read_poll_timeout - Poll until a condition is met or timeout
 148 *
 149 * @field: Regmap field to read from
 150 * @val: Unsigned integer variable to read the value into
 151 * @cond: Break condition (usually involving @val)
 152 * @sleep_us: Maximum time to sleep between reads in us (0
 153 *            tight-loops).  Should be less than ~20ms since usleep_range
 154 *            is used (see Documentation/timers/timers-howto.txt).
 155 * @timeout_us: Timeout in us, 0 means never timeout
 156 *
 157 * Returns 0 on success and -ETIMEDOUT upon a timeout or the regmap_field_read
 158 * error return value in case of a error read. In the two former cases,
 159 * the last read value at @addr is stored in @val. Must not be called
 160 * from atomic context if sleep_us or timeout_us are used.
 161 *
 162 * This is modelled after the readx_poll_timeout macros in linux/iopoll.h.
 163 */
 164#define regmap_field_read_poll_timeout(field, val, cond, sleep_us, timeout_us) \
 165({ \
 166        u64 __timeout_us = (timeout_us); \
 167        unsigned long __sleep_us = (sleep_us); \
 168        ktime_t timeout = ktime_add_us(ktime_get(), __timeout_us); \
 169        int pollret; \
 170        might_sleep_if(__sleep_us); \
 171        for (;;) { \
 172                pollret = regmap_field_read((field), &(val)); \
 173                if (pollret) \
 174                        break; \
 175                if (cond) \
 176                        break; \
 177                if (__timeout_us && ktime_compare(ktime_get(), timeout) > 0) { \
 178                        pollret = regmap_field_read((field), &(val)); \
 179                        break; \
 180                } \
 181                if (__sleep_us) \
 182                        usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
 183        } \
 184        pollret ?: ((cond) ? 0 : -ETIMEDOUT); \
 185})
 186
 187#ifdef CONFIG_REGMAP
 188
 189enum regmap_endian {
 190        /* Unspecified -> 0 -> Backwards compatible default */
 191        REGMAP_ENDIAN_DEFAULT = 0,
 192        REGMAP_ENDIAN_BIG,
 193        REGMAP_ENDIAN_LITTLE,
 194        REGMAP_ENDIAN_NATIVE,
 195};
 196
 197/**
 198 * struct regmap_range - A register range, used for access related checks
 199 *                       (readable/writeable/volatile/precious checks)
 200 *
 201 * @range_min: address of first register
 202 * @range_max: address of last register
 203 */
 204struct regmap_range {
 205        unsigned int range_min;
 206        unsigned int range_max;
 207};
 208
 209#define regmap_reg_range(low, high) { .range_min = low, .range_max = high, }
 210
 211/**
 212 * struct regmap_access_table - A table of register ranges for access checks
 213 *
 214 * @yes_ranges : pointer to an array of regmap ranges used as "yes ranges"
 215 * @n_yes_ranges: size of the above array
 216 * @no_ranges: pointer to an array of regmap ranges used as "no ranges"
 217 * @n_no_ranges: size of the above array
 218 *
 219 * A table of ranges including some yes ranges and some no ranges.
 220 * If a register belongs to a no_range, the corresponding check function
 221 * will return false. If a register belongs to a yes range, the corresponding
 222 * check function will return true. "no_ranges" are searched first.
 223 */
 224struct regmap_access_table {
 225        const struct regmap_range *yes_ranges;
 226        unsigned int n_yes_ranges;
 227        const struct regmap_range *no_ranges;
 228        unsigned int n_no_ranges;
 229};
 230
 231typedef void (*regmap_lock)(void *);
 232typedef void (*regmap_unlock)(void *);
 233
 234/**
 235 * struct regmap_config - Configuration for the register map of a device.
 236 *
 237 * @name: Optional name of the regmap. Useful when a device has multiple
 238 *        register regions.
 239 *
 240 * @reg_bits: Number of bits in a register address, mandatory.
 241 * @reg_stride: The register address stride. Valid register addresses are a
 242 *              multiple of this value. If set to 0, a value of 1 will be
 243 *              used.
 244 * @pad_bits: Number of bits of padding between register and value.
 245 * @val_bits: Number of bits in a register value, mandatory.
 246 *
 247 * @writeable_reg: Optional callback returning true if the register
 248 *                 can be written to. If this field is NULL but wr_table
 249 *                 (see below) is not, the check is performed on such table
 250 *                 (a register is writeable if it belongs to one of the ranges
 251 *                  specified by wr_table).
 252 * @readable_reg: Optional callback returning true if the register
 253 *                can be read from. If this field is NULL but rd_table
 254 *                 (see below) is not, the check is performed on such table
 255 *                 (a register is readable if it belongs to one of the ranges
 256 *                  specified by rd_table).
 257 * @volatile_reg: Optional callback returning true if the register
 258 *                value can't be cached. If this field is NULL but
 259 *                volatile_table (see below) is not, the check is performed on
 260 *                such table (a register is volatile if it belongs to one of
 261 *                the ranges specified by volatile_table).
 262 * @precious_reg: Optional callback returning true if the register
 263 *                should not be read outside of a call from the driver
 264 *                (e.g., a clear on read interrupt status register). If this
 265 *                field is NULL but precious_table (see below) is not, the
 266 *                check is performed on such table (a register is precious if
 267 *                it belongs to one of the ranges specified by precious_table).
 268 * @writeable_noinc_reg: Optional callback returning true if the register
 269 *                      supports multiple write operations without incrementing
 270 *                      the register number. If this field is NULL but
 271 *                      wr_noinc_table (see below) is not, the check is
 272 *                      performed on such table (a register is no increment
 273 *                      writeable if it belongs to one of the ranges specified
 274 *                      by wr_noinc_table).
 275 * @readable_noinc_reg: Optional callback returning true if the register
 276 *                      supports multiple read operations without incrementing
 277 *                      the register number. If this field is NULL but
 278 *                      rd_noinc_table (see below) is not, the check is
 279 *                      performed on such table (a register is no increment
 280 *                      readable if it belongs to one of the ranges specified
 281 *                      by rd_noinc_table).
 282 * @disable_locking: This regmap is either protected by external means or
 283 *                   is guaranteed not be be accessed from multiple threads.
 284 *                   Don't use any locking mechanisms.
 285 * @lock:         Optional lock callback (overrides regmap's default lock
 286 *                function, based on spinlock or mutex).
 287 * @unlock:       As above for unlocking.
 288 * @lock_arg:     this field is passed as the only argument of lock/unlock
 289 *                functions (ignored in case regular lock/unlock functions
 290 *                are not overridden).
 291 * @reg_read:     Optional callback that if filled will be used to perform
 292 *                all the reads from the registers. Should only be provided for
 293 *                devices whose read operation cannot be represented as a simple
 294 *                read operation on a bus such as SPI, I2C, etc. Most of the
 295 *                devices do not need this.
 296 * @reg_write:    Same as above for writing.
 297 * @fast_io:      Register IO is fast. Use a spinlock instead of a mutex
 298 *                to perform locking. This field is ignored if custom lock/unlock
 299 *                functions are used (see fields lock/unlock of struct regmap_config).
 300 *                This field is a duplicate of a similar file in
 301 *                'struct regmap_bus' and serves exact same purpose.
 302 *                 Use it only for "no-bus" cases.
 303 * @max_register: Optional, specifies the maximum valid register address.
 304 * @wr_table:     Optional, points to a struct regmap_access_table specifying
 305 *                valid ranges for write access.
 306 * @rd_table:     As above, for read access.
 307 * @volatile_table: As above, for volatile registers.
 308 * @precious_table: As above, for precious registers.
 309 * @wr_noinc_table: As above, for no increment writeable registers.
 310 * @rd_noinc_table: As above, for no increment readable registers.
 311 * @reg_defaults: Power on reset values for registers (for use with
 312 *                register cache support).
 313 * @num_reg_defaults: Number of elements in reg_defaults.
 314 *
 315 * @read_flag_mask: Mask to be set in the top bytes of the register when doing
 316 *                  a read.
 317 * @write_flag_mask: Mask to be set in the top bytes of the register when doing
 318 *                   a write. If both read_flag_mask and write_flag_mask are
 319 *                   empty and zero_flag_mask is not set the regmap_bus default
 320 *                   masks are used.
 321 * @zero_flag_mask: If set, read_flag_mask and write_flag_mask are used even
 322 *                   if they are both empty.
 323 * @use_single_read: If set, converts the bulk read operation into a series of
 324 *                   single read operations. This is useful for a device that
 325 *                   does not support  bulk read.
 326 * @use_single_write: If set, converts the bulk write operation into a series of
 327 *                    single write operations. This is useful for a device that
 328 *                    does not support bulk write.
 329 * @can_multi_write: If set, the device supports the multi write mode of bulk
 330 *                   write operations, if clear multi write requests will be
 331 *                   split into individual write operations
 332 *
 333 * @cache_type: The actual cache type.
 334 * @reg_defaults_raw: Power on reset values for registers (for use with
 335 *                    register cache support).
 336 * @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
 337 * @reg_format_endian: Endianness for formatted register addresses. If this is
 338 *                     DEFAULT, the @reg_format_endian_default value from the
 339 *                     regmap bus is used.
 340 * @val_format_endian: Endianness for formatted register values. If this is
 341 *                     DEFAULT, the @reg_format_endian_default value from the
 342 *                     regmap bus is used.
 343 *
 344 * @ranges: Array of configuration entries for virtual address ranges.
 345 * @num_ranges: Number of range configuration entries.
 346 * @use_hwlock: Indicate if a hardware spinlock should be used.
 347 * @hwlock_id: Specify the hardware spinlock id.
 348 * @hwlock_mode: The hardware spinlock mode, should be HWLOCK_IRQSTATE,
 349 *               HWLOCK_IRQ or 0.
 350 */
 351struct regmap_config {
 352        const char *name;
 353
 354        int reg_bits;
 355        int reg_stride;
 356        int pad_bits;
 357        int val_bits;
 358
 359        bool (*writeable_reg)(struct device *dev, unsigned int reg);
 360        bool (*readable_reg)(struct device *dev, unsigned int reg);
 361        bool (*volatile_reg)(struct device *dev, unsigned int reg);
 362        bool (*precious_reg)(struct device *dev, unsigned int reg);
 363        bool (*writeable_noinc_reg)(struct device *dev, unsigned int reg);
 364        bool (*readable_noinc_reg)(struct device *dev, unsigned int reg);
 365
 366        bool disable_locking;
 367        regmap_lock lock;
 368        regmap_unlock unlock;
 369        void *lock_arg;
 370
 371        int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
 372        int (*reg_write)(void *context, unsigned int reg, unsigned int val);
 373
 374        bool fast_io;
 375
 376        unsigned int max_register;
 377        const struct regmap_access_table *wr_table;
 378        const struct regmap_access_table *rd_table;
 379        const struct regmap_access_table *volatile_table;
 380        const struct regmap_access_table *precious_table;
 381        const struct regmap_access_table *wr_noinc_table;
 382        const struct regmap_access_table *rd_noinc_table;
 383        const struct reg_default *reg_defaults;
 384        unsigned int num_reg_defaults;
 385        enum regcache_type cache_type;
 386        const void *reg_defaults_raw;
 387        unsigned int num_reg_defaults_raw;
 388
 389        unsigned long read_flag_mask;
 390        unsigned long write_flag_mask;
 391        bool zero_flag_mask;
 392
 393        bool use_single_read;
 394        bool use_single_write;
 395        bool can_multi_write;
 396
 397        enum regmap_endian reg_format_endian;
 398        enum regmap_endian val_format_endian;
 399
 400        const struct regmap_range_cfg *ranges;
 401        unsigned int num_ranges;
 402
 403        bool use_hwlock;
 404        unsigned int hwlock_id;
 405        unsigned int hwlock_mode;
 406};
 407
 408/**
 409 * struct regmap_range_cfg - Configuration for indirectly accessed or paged
 410 *                           registers.
 411 *
 412 * @name: Descriptive name for diagnostics
 413 *
 414 * @range_min: Address of the lowest register address in virtual range.
 415 * @range_max: Address of the highest register in virtual range.
 416 *
 417 * @selector_reg: Register with selector field.
 418 * @selector_mask: Bit shift for selector value.
 419 * @selector_shift: Bit mask for selector value.
 420 *
 421 * @window_start: Address of first (lowest) register in data window.
 422 * @window_len: Number of registers in data window.
 423 *
 424 * Registers, mapped to this virtual range, are accessed in two steps:
 425 *     1. page selector register update;
 426 *     2. access through data window registers.
 427 */
 428struct regmap_range_cfg {
 429        const char *name;
 430
 431        /* Registers of virtual address range */
 432        unsigned int range_min;
 433        unsigned int range_max;
 434
 435        /* Page selector for indirect addressing */
 436        unsigned int selector_reg;
 437        unsigned int selector_mask;
 438        int selector_shift;
 439
 440        /* Data window (per each page) */
 441        unsigned int window_start;
 442        unsigned int window_len;
 443};
 444
 445struct regmap_async;
 446
 447typedef int (*regmap_hw_write)(void *context, const void *data,
 448                               size_t count);
 449typedef int (*regmap_hw_gather_write)(void *context,
 450                                      const void *reg, size_t reg_len,
 451                                      const void *val, size_t val_len);
 452typedef int (*regmap_hw_async_write)(void *context,
 453                                     const void *reg, size_t reg_len,
 454                                     const void *val, size_t val_len,
 455                                     struct regmap_async *async);
 456typedef int (*regmap_hw_read)(void *context,
 457                              const void *reg_buf, size_t reg_size,
 458                              void *val_buf, size_t val_size);
 459typedef int (*regmap_hw_reg_read)(void *context, unsigned int reg,
 460                                  unsigned int *val);
 461typedef int (*regmap_hw_reg_write)(void *context, unsigned int reg,
 462                                   unsigned int val);
 463typedef int (*regmap_hw_reg_update_bits)(void *context, unsigned int reg,
 464                                         unsigned int mask, unsigned int val);
 465typedef struct regmap_async *(*regmap_hw_async_alloc)(void);
 466typedef void (*regmap_hw_free_context)(void *context);
 467
 468/**
 469 * struct regmap_bus - Description of a hardware bus for the register map
 470 *                     infrastructure.
 471 *
 472 * @fast_io: Register IO is fast. Use a spinlock instead of a mutex
 473 *           to perform locking. This field is ignored if custom lock/unlock
 474 *           functions are used (see fields lock/unlock of
 475 *           struct regmap_config).
 476 * @write: Write operation.
 477 * @gather_write: Write operation with split register/value, return -ENOTSUPP
 478 *                if not implemented  on a given device.
 479 * @async_write: Write operation which completes asynchronously, optional and
 480 *               must serialise with respect to non-async I/O.
 481 * @reg_write: Write a single register value to the given register address. This
 482 *             write operation has to complete when returning from the function.
 483 * @reg_update_bits: Update bits operation to be used against volatile
 484 *                   registers, intended for devices supporting some mechanism
 485 *                   for setting clearing bits without having to
 486 *                   read/modify/write.
 487 * @read: Read operation.  Data is returned in the buffer used to transmit
 488 *         data.
 489 * @reg_read: Read a single register value from a given register address.
 490 * @free_context: Free context.
 491 * @async_alloc: Allocate a regmap_async() structure.
 492 * @read_flag_mask: Mask to be set in the top byte of the register when doing
 493 *                  a read.
 494 * @reg_format_endian_default: Default endianness for formatted register
 495 *     addresses. Used when the regmap_config specifies DEFAULT. If this is
 496 *     DEFAULT, BIG is assumed.
 497 * @val_format_endian_default: Default endianness for formatted register
 498 *     values. Used when the regmap_config specifies DEFAULT. If this is
 499 *     DEFAULT, BIG is assumed.
 500 * @max_raw_read: Max raw read size that can be used on the bus.
 501 * @max_raw_write: Max raw write size that can be used on the bus.
 502 */
 503struct regmap_bus {
 504        bool fast_io;
 505        regmap_hw_write write;
 506        regmap_hw_gather_write gather_write;
 507        regmap_hw_async_write async_write;
 508        regmap_hw_reg_write reg_write;
 509        regmap_hw_reg_update_bits reg_update_bits;
 510        regmap_hw_read read;
 511        regmap_hw_reg_read reg_read;
 512        regmap_hw_free_context free_context;
 513        regmap_hw_async_alloc async_alloc;
 514        u8 read_flag_mask;
 515        enum regmap_endian reg_format_endian_default;
 516        enum regmap_endian val_format_endian_default;
 517        size_t max_raw_read;
 518        size_t max_raw_write;
 519};
 520
 521/*
 522 * __regmap_init functions.
 523 *
 524 * These functions take a lock key and name parameter, and should not be called
 525 * directly. Instead, use the regmap_init macros that generate a key and name
 526 * for each call.
 527 */
 528struct regmap *__regmap_init(struct device *dev,
 529                             const struct regmap_bus *bus,
 530                             void *bus_context,
 531                             const struct regmap_config *config,
 532                             struct lock_class_key *lock_key,
 533                             const char *lock_name);
 534struct regmap *__regmap_init_i2c(struct i2c_client *i2c,
 535                                 const struct regmap_config *config,
 536                                 struct lock_class_key *lock_key,
 537                                 const char *lock_name);
 538struct regmap *__regmap_init_sccb(struct i2c_client *i2c,
 539                                  const struct regmap_config *config,
 540                                  struct lock_class_key *lock_key,
 541                                  const char *lock_name);
 542struct regmap *__regmap_init_slimbus(struct slim_device *slimbus,
 543                                 const struct regmap_config *config,
 544                                 struct lock_class_key *lock_key,
 545                                 const char *lock_name);
 546struct regmap *__regmap_init_spi(struct spi_device *dev,
 547                                 const struct regmap_config *config,
 548                                 struct lock_class_key *lock_key,
 549                                 const char *lock_name);
 550struct regmap *__regmap_init_spmi_base(struct spmi_device *dev,
 551                                       const struct regmap_config *config,
 552                                       struct lock_class_key *lock_key,
 553                                       const char *lock_name);
 554struct regmap *__regmap_init_spmi_ext(struct spmi_device *dev,
 555                                      const struct regmap_config *config,
 556                                      struct lock_class_key *lock_key,
 557                                      const char *lock_name);
 558struct regmap *__regmap_init_w1(struct device *w1_dev,
 559                                 const struct regmap_config *config,
 560                                 struct lock_class_key *lock_key,
 561                                 const char *lock_name);
 562struct regmap *__regmap_init_mmio_clk(struct device *dev, const char *clk_id,
 563                                      void __iomem *regs,
 564                                      const struct regmap_config *config,
 565                                      struct lock_class_key *lock_key,
 566                                      const char *lock_name);
 567struct regmap *__regmap_init_ac97(struct snd_ac97 *ac97,
 568                                  const struct regmap_config *config,
 569                                  struct lock_class_key *lock_key,
 570                                  const char *lock_name);
 571struct regmap *__regmap_init_sdw(struct sdw_slave *sdw,
 572                                 const struct regmap_config *config,
 573                                 struct lock_class_key *lock_key,
 574                                 const char *lock_name);
 575
 576struct regmap *__devm_regmap_init(struct device *dev,
 577                                  const struct regmap_bus *bus,
 578                                  void *bus_context,
 579                                  const struct regmap_config *config,
 580                                  struct lock_class_key *lock_key,
 581                                  const char *lock_name);
 582struct regmap *__devm_regmap_init_i2c(struct i2c_client *i2c,
 583                                      const struct regmap_config *config,
 584                                      struct lock_class_key *lock_key,
 585                                      const char *lock_name);
 586struct regmap *__devm_regmap_init_sccb(struct i2c_client *i2c,
 587                                       const struct regmap_config *config,
 588                                       struct lock_class_key *lock_key,
 589                                       const char *lock_name);
 590struct regmap *__devm_regmap_init_spi(struct spi_device *dev,
 591                                      const struct regmap_config *config,
 592                                      struct lock_class_key *lock_key,
 593                                      const char *lock_name);
 594struct regmap *__devm_regmap_init_spmi_base(struct spmi_device *dev,
 595                                            const struct regmap_config *config,
 596                                            struct lock_class_key *lock_key,
 597                                            const char *lock_name);
 598struct regmap *__devm_regmap_init_spmi_ext(struct spmi_device *dev,
 599                                           const struct regmap_config *config,
 600                                           struct lock_class_key *lock_key,
 601                                           const char *lock_name);
 602struct regmap *__devm_regmap_init_w1(struct device *w1_dev,
 603                                      const struct regmap_config *config,
 604                                      struct lock_class_key *lock_key,
 605                                      const char *lock_name);
 606struct regmap *__devm_regmap_init_mmio_clk(struct device *dev,
 607                                           const char *clk_id,
 608                                           void __iomem *regs,
 609                                           const struct regmap_config *config,
 610                                           struct lock_class_key *lock_key,
 611                                           const char *lock_name);
 612struct regmap *__devm_regmap_init_ac97(struct snd_ac97 *ac97,
 613                                       const struct regmap_config *config,
 614                                       struct lock_class_key *lock_key,
 615                                       const char *lock_name);
 616struct regmap *__devm_regmap_init_sdw(struct sdw_slave *sdw,
 617                                 const struct regmap_config *config,
 618                                 struct lock_class_key *lock_key,
 619                                 const char *lock_name);
 620struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus,
 621                                 const struct regmap_config *config,
 622                                 struct lock_class_key *lock_key,
 623                                 const char *lock_name);
 624/*
 625 * Wrapper for regmap_init macros to include a unique lockdep key and name
 626 * for each call. No-op if CONFIG_LOCKDEP is not set.
 627 *
 628 * @fn: Real function to call (in the form __[*_]regmap_init[_*])
 629 * @name: Config variable name (#config in the calling macro)
 630 **/
 631#ifdef CONFIG_LOCKDEP
 632#define __regmap_lockdep_wrapper(fn, name, ...)                         \
 633(                                                                       \
 634        ({                                                              \
 635                static struct lock_class_key _key;                      \
 636                fn(__VA_ARGS__, &_key,                                  \
 637                        KBUILD_BASENAME ":"                             \
 638                        __stringify(__LINE__) ":"                       \
 639                        "(" name ")->lock");                            \
 640        })                                                              \
 641)
 642#else
 643#define __regmap_lockdep_wrapper(fn, name, ...) fn(__VA_ARGS__, NULL, NULL)
 644#endif
 645
 646/**
 647 * regmap_init() - Initialise register map
 648 *
 649 * @dev: Device that will be interacted with
 650 * @bus: Bus-specific callbacks to use with device
 651 * @bus_context: Data passed to bus-specific callbacks
 652 * @config: Configuration for register map
 653 *
 654 * The return value will be an ERR_PTR() on error or a valid pointer to
 655 * a struct regmap.  This function should generally not be called
 656 * directly, it should be called by bus-specific init functions.
 657 */
 658#define regmap_init(dev, bus, bus_context, config)                      \
 659        __regmap_lockdep_wrapper(__regmap_init, #config,                \
 660                                dev, bus, bus_context, config)
 661int regmap_attach_dev(struct device *dev, struct regmap *map,
 662                      const struct regmap_config *config);
 663
 664/**
 665 * regmap_init_i2c() - Initialise register map
 666 *
 667 * @i2c: Device that will be interacted with
 668 * @config: Configuration for register map
 669 *
 670 * The return value will be an ERR_PTR() on error or a valid pointer to
 671 * a struct regmap.
 672 */
 673#define regmap_init_i2c(i2c, config)                                    \
 674        __regmap_lockdep_wrapper(__regmap_init_i2c, #config,            \
 675                                i2c, config)
 676
 677/**
 678 * regmap_init_sccb() - Initialise register map
 679 *
 680 * @i2c: Device that will be interacted with
 681 * @config: Configuration for register map
 682 *
 683 * The return value will be an ERR_PTR() on error or a valid pointer to
 684 * a struct regmap.
 685 */
 686#define regmap_init_sccb(i2c, config)                                   \
 687        __regmap_lockdep_wrapper(__regmap_init_sccb, #config,           \
 688                                i2c, config)
 689
 690/**
 691 * regmap_init_slimbus() - Initialise register map
 692 *
 693 * @slimbus: Device that will be interacted with
 694 * @config: Configuration for register map
 695 *
 696 * The return value will be an ERR_PTR() on error or a valid pointer to
 697 * a struct regmap.
 698 */
 699#define regmap_init_slimbus(slimbus, config)                            \
 700        __regmap_lockdep_wrapper(__regmap_init_slimbus, #config,        \
 701                                slimbus, config)
 702
 703/**
 704 * regmap_init_spi() - Initialise register map
 705 *
 706 * @dev: Device that will be interacted with
 707 * @config: Configuration for register map
 708 *
 709 * The return value will be an ERR_PTR() on error or a valid pointer to
 710 * a struct regmap.
 711 */
 712#define regmap_init_spi(dev, config)                                    \
 713        __regmap_lockdep_wrapper(__regmap_init_spi, #config,            \
 714                                dev, config)
 715
 716/**
 717 * regmap_init_spmi_base() - Create regmap for the Base register space
 718 *
 719 * @dev:        SPMI device that will be interacted with
 720 * @config:     Configuration for register map
 721 *
 722 * The return value will be an ERR_PTR() on error or a valid pointer to
 723 * a struct regmap.
 724 */
 725#define regmap_init_spmi_base(dev, config)                              \
 726        __regmap_lockdep_wrapper(__regmap_init_spmi_base, #config,      \
 727                                dev, config)
 728
 729/**
 730 * regmap_init_spmi_ext() - Create regmap for Ext register space
 731 *
 732 * @dev:        Device that will be interacted with
 733 * @config:     Configuration for register map
 734 *
 735 * The return value will be an ERR_PTR() on error or a valid pointer to
 736 * a struct regmap.
 737 */
 738#define regmap_init_spmi_ext(dev, config)                               \
 739        __regmap_lockdep_wrapper(__regmap_init_spmi_ext, #config,       \
 740                                dev, config)
 741
 742/**
 743 * regmap_init_w1() - Initialise register map
 744 *
 745 * @w1_dev: Device that will be interacted with
 746 * @config: Configuration for register map
 747 *
 748 * The return value will be an ERR_PTR() on error or a valid pointer to
 749 * a struct regmap.
 750 */
 751#define regmap_init_w1(w1_dev, config)                                  \
 752        __regmap_lockdep_wrapper(__regmap_init_w1, #config,             \
 753                                w1_dev, config)
 754
 755/**
 756 * regmap_init_mmio_clk() - Initialise register map with register clock
 757 *
 758 * @dev: Device that will be interacted with
 759 * @clk_id: register clock consumer ID
 760 * @regs: Pointer to memory-mapped IO region
 761 * @config: Configuration for register map
 762 *
 763 * The return value will be an ERR_PTR() on error or a valid pointer to
 764 * a struct regmap.
 765 */
 766#define regmap_init_mmio_clk(dev, clk_id, regs, config)                 \
 767        __regmap_lockdep_wrapper(__regmap_init_mmio_clk, #config,       \
 768                                dev, clk_id, regs, config)
 769
 770/**
 771 * regmap_init_mmio() - Initialise register map
 772 *
 773 * @dev: Device that will be interacted with
 774 * @regs: Pointer to memory-mapped IO region
 775 * @config: Configuration for register map
 776 *
 777 * The return value will be an ERR_PTR() on error or a valid pointer to
 778 * a struct regmap.
 779 */
 780#define regmap_init_mmio(dev, regs, config)             \
 781        regmap_init_mmio_clk(dev, NULL, regs, config)
 782
 783/**
 784 * regmap_init_ac97() - Initialise AC'97 register map
 785 *
 786 * @ac97: Device that will be interacted with
 787 * @config: Configuration for register map
 788 *
 789 * The return value will be an ERR_PTR() on error or a valid pointer to
 790 * a struct regmap.
 791 */
 792#define regmap_init_ac97(ac97, config)                                  \
 793        __regmap_lockdep_wrapper(__regmap_init_ac97, #config,           \
 794                                ac97, config)
 795bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);
 796
 797/**
 798 * regmap_init_sdw() - Initialise register map
 799 *
 800 * @sdw: Device that will be interacted with
 801 * @config: Configuration for register map
 802 *
 803 * The return value will be an ERR_PTR() on error or a valid pointer to
 804 * a struct regmap.
 805 */
 806#define regmap_init_sdw(sdw, config)                                    \
 807        __regmap_lockdep_wrapper(__regmap_init_sdw, #config,            \
 808                                sdw, config)
 809
 810
 811/**
 812 * devm_regmap_init() - Initialise managed register map
 813 *
 814 * @dev: Device that will be interacted with
 815 * @bus: Bus-specific callbacks to use with device
 816 * @bus_context: Data passed to bus-specific callbacks
 817 * @config: Configuration for register map
 818 *
 819 * The return value will be an ERR_PTR() on error or a valid pointer
 820 * to a struct regmap.  This function should generally not be called
 821 * directly, it should be called by bus-specific init functions.  The
 822 * map will be automatically freed by the device management code.
 823 */
 824#define devm_regmap_init(dev, bus, bus_context, config)                 \
 825        __regmap_lockdep_wrapper(__devm_regmap_init, #config,           \
 826                                dev, bus, bus_context, config)
 827
 828/**
 829 * devm_regmap_init_i2c() - Initialise managed register map
 830 *
 831 * @i2c: Device that will be interacted with
 832 * @config: Configuration for register map
 833 *
 834 * The return value will be an ERR_PTR() on error or a valid pointer
 835 * to a struct regmap.  The regmap will be automatically freed by the
 836 * device management code.
 837 */
 838#define devm_regmap_init_i2c(i2c, config)                               \
 839        __regmap_lockdep_wrapper(__devm_regmap_init_i2c, #config,       \
 840                                i2c, config)
 841
 842/**
 843 * devm_regmap_init_sccb() - Initialise managed register map
 844 *
 845 * @i2c: Device that will be interacted with
 846 * @config: Configuration for register map
 847 *
 848 * The return value will be an ERR_PTR() on error or a valid pointer
 849 * to a struct regmap.  The regmap will be automatically freed by the
 850 * device management code.
 851 */
 852#define devm_regmap_init_sccb(i2c, config)                              \
 853        __regmap_lockdep_wrapper(__devm_regmap_init_sccb, #config,      \
 854                                i2c, config)
 855
 856/**
 857 * devm_regmap_init_spi() - Initialise register map
 858 *
 859 * @dev: Device that will be interacted with
 860 * @config: Configuration for register map
 861 *
 862 * The return value will be an ERR_PTR() on error or a valid pointer
 863 * to a struct regmap.  The map will be automatically freed by the
 864 * device management code.
 865 */
 866#define devm_regmap_init_spi(dev, config)                               \
 867        __regmap_lockdep_wrapper(__devm_regmap_init_spi, #config,       \
 868                                dev, config)
 869
 870/**
 871 * devm_regmap_init_spmi_base() - Create managed regmap for Base register space
 872 *
 873 * @dev:        SPMI device that will be interacted with
 874 * @config:     Configuration for register map
 875 *
 876 * The return value will be an ERR_PTR() on error or a valid pointer
 877 * to a struct regmap.  The regmap will be automatically freed by the
 878 * device management code.
 879 */
 880#define devm_regmap_init_spmi_base(dev, config)                         \
 881        __regmap_lockdep_wrapper(__devm_regmap_init_spmi_base, #config, \
 882                                dev, config)
 883
 884/**
 885 * devm_regmap_init_spmi_ext() - Create managed regmap for Ext register space
 886 *
 887 * @dev:        SPMI device that will be interacted with
 888 * @config:     Configuration for register map
 889 *
 890 * The return value will be an ERR_PTR() on error or a valid pointer
 891 * to a struct regmap.  The regmap will be automatically freed by the
 892 * device management code.
 893 */
 894#define devm_regmap_init_spmi_ext(dev, config)                          \
 895        __regmap_lockdep_wrapper(__devm_regmap_init_spmi_ext, #config,  \
 896                                dev, config)
 897
 898/**
 899 * devm_regmap_init_w1() - Initialise managed register map
 900 *
 901 * @w1_dev: Device that will be interacted with
 902 * @config: Configuration for register map
 903 *
 904 * The return value will be an ERR_PTR() on error or a valid pointer
 905 * to a struct regmap.  The regmap will be automatically freed by the
 906 * device management code.
 907 */
 908#define devm_regmap_init_w1(w1_dev, config)                             \
 909        __regmap_lockdep_wrapper(__devm_regmap_init_w1, #config,        \
 910                                w1_dev, config)
 911/**
 912 * devm_regmap_init_mmio_clk() - Initialise managed register map with clock
 913 *
 914 * @dev: Device that will be interacted with
 915 * @clk_id: register clock consumer ID
 916 * @regs: Pointer to memory-mapped IO region
 917 * @config: Configuration for register map
 918 *
 919 * The return value will be an ERR_PTR() on error or a valid pointer
 920 * to a struct regmap.  The regmap will be automatically freed by the
 921 * device management code.
 922 */
 923#define devm_regmap_init_mmio_clk(dev, clk_id, regs, config)            \
 924        __regmap_lockdep_wrapper(__devm_regmap_init_mmio_clk, #config,  \
 925                                dev, clk_id, regs, config)
 926
 927/**
 928 * devm_regmap_init_mmio() - Initialise managed register map
 929 *
 930 * @dev: Device that will be interacted with
 931 * @regs: Pointer to memory-mapped IO region
 932 * @config: Configuration for register map
 933 *
 934 * The return value will be an ERR_PTR() on error or a valid pointer
 935 * to a struct regmap.  The regmap will be automatically freed by the
 936 * device management code.
 937 */
 938#define devm_regmap_init_mmio(dev, regs, config)                \
 939        devm_regmap_init_mmio_clk(dev, NULL, regs, config)
 940
 941/**
 942 * devm_regmap_init_ac97() - Initialise AC'97 register map
 943 *
 944 * @ac97: Device that will be interacted with
 945 * @config: Configuration for register map
 946 *
 947 * The return value will be an ERR_PTR() on error or a valid pointer
 948 * to a struct regmap.  The regmap will be automatically freed by the
 949 * device management code.
 950 */
 951#define devm_regmap_init_ac97(ac97, config)                             \
 952        __regmap_lockdep_wrapper(__devm_regmap_init_ac97, #config,      \
 953                                ac97, config)
 954
 955/**
 956 * devm_regmap_init_sdw() - Initialise managed register map
 957 *
 958 * @sdw: Device that will be interacted with
 959 * @config: Configuration for register map
 960 *
 961 * The return value will be an ERR_PTR() on error or a valid pointer
 962 * to a struct regmap. The regmap will be automatically freed by the
 963 * device management code.
 964 */
 965#define devm_regmap_init_sdw(sdw, config)                               \
 966        __regmap_lockdep_wrapper(__devm_regmap_init_sdw, #config,       \
 967                                sdw, config)
 968
 969/**
 970 * devm_regmap_init_slimbus() - Initialise managed register map
 971 *
 972 * @slimbus: Device that will be interacted with
 973 * @config: Configuration for register map
 974 *
 975 * The return value will be an ERR_PTR() on error or a valid pointer
 976 * to a struct regmap. The regmap will be automatically freed by the
 977 * device management code.
 978 */
 979#define devm_regmap_init_slimbus(slimbus, config)                       \
 980        __regmap_lockdep_wrapper(__devm_regmap_init_slimbus, #config,   \
 981                                slimbus, config)
 982int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk);
 983void regmap_mmio_detach_clk(struct regmap *map);
 984void regmap_exit(struct regmap *map);
 985int regmap_reinit_cache(struct regmap *map,
 986                        const struct regmap_config *config);
 987struct regmap *dev_get_regmap(struct device *dev, const char *name);
 988struct device *regmap_get_device(struct regmap *map);
 989int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
 990int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val);
 991int regmap_raw_write(struct regmap *map, unsigned int reg,
 992                     const void *val, size_t val_len);
 993int regmap_noinc_write(struct regmap *map, unsigned int reg,
 994                     const void *val, size_t val_len);
 995int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
 996                        size_t val_count);
 997int regmap_multi_reg_write(struct regmap *map, const struct reg_sequence *regs,
 998                        int num_regs);
 999int regmap_multi_reg_write_bypassed(struct regmap *map,
1000                                    const struct reg_sequence *regs,
1001                                    int num_regs);
1002int regmap_raw_write_async(struct regmap *map, unsigned int reg,
1003                           const void *val, size_t val_len);
1004int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val);
1005int regmap_raw_read(struct regmap *map, unsigned int reg,
1006                    void *val, size_t val_len);
1007int regmap_noinc_read(struct regmap *map, unsigned int reg,
1008                      void *val, size_t val_len);
1009int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
1010                     size_t val_count);
1011int regmap_update_bits_base(struct regmap *map, unsigned int reg,
1012                            unsigned int mask, unsigned int val,
1013                            bool *change, bool async, bool force);
1014int regmap_get_val_bytes(struct regmap *map);
1015int regmap_get_max_register(struct regmap *map);
1016int regmap_get_reg_stride(struct regmap *map);
1017int regmap_async_complete(struct regmap *map);
1018bool regmap_can_raw_write(struct regmap *map);
1019size_t regmap_get_raw_read_max(struct regmap *map);
1020size_t regmap_get_raw_write_max(struct regmap *map);
1021
1022int regcache_sync(struct regmap *map);
1023int regcache_sync_region(struct regmap *map, unsigned int min,
1024                         unsigned int max);
1025int regcache_drop_region(struct regmap *map, unsigned int min,
1026                         unsigned int max);
1027void regcache_cache_only(struct regmap *map, bool enable);
1028void regcache_cache_bypass(struct regmap *map, bool enable);
1029void regcache_mark_dirty(struct regmap *map);
1030
1031bool regmap_check_range_table(struct regmap *map, unsigned int reg,
1032                              const struct regmap_access_table *table);
1033
1034int regmap_register_patch(struct regmap *map, const struct reg_sequence *regs,
1035                          int num_regs);
1036int regmap_parse_val(struct regmap *map, const void *buf,
1037                                unsigned int *val);
1038
1039static inline bool regmap_reg_in_range(unsigned int reg,
1040                                       const struct regmap_range *range)
1041{
1042        return reg >= range->range_min && reg <= range->range_max;
1043}
1044
1045bool regmap_reg_in_ranges(unsigned int reg,
1046                          const struct regmap_range *ranges,
1047                          unsigned int nranges);
1048
1049/**
1050 * struct reg_field - Description of an register field
1051 *
1052 * @reg: Offset of the register within the regmap bank
1053 * @lsb: lsb of the register field.
1054 * @msb: msb of the register field.
1055 * @id_size: port size if it has some ports
1056 * @id_offset: address offset for each ports
1057 */
1058struct reg_field {
1059        unsigned int reg;
1060        unsigned int lsb;
1061        unsigned int msb;
1062        unsigned int id_size;
1063        unsigned int id_offset;
1064};
1065
1066#define REG_FIELD(_reg, _lsb, _msb) {           \
1067                                .reg = _reg,    \
1068                                .lsb = _lsb,    \
1069                                .msb = _msb,    \
1070                                }
1071
1072struct regmap_field *regmap_field_alloc(struct regmap *regmap,
1073                struct reg_field reg_field);
1074void regmap_field_free(struct regmap_field *field);
1075
1076struct regmap_field *devm_regmap_field_alloc(struct device *dev,
1077                struct regmap *regmap, struct reg_field reg_field);
1078void devm_regmap_field_free(struct device *dev, struct regmap_field *field);
1079
1080int regmap_field_read(struct regmap_field *field, unsigned int *val);
1081int regmap_field_update_bits_base(struct regmap_field *field,
1082                                  unsigned int mask, unsigned int val,
1083                                  bool *change, bool async, bool force);
1084int regmap_fields_read(struct regmap_field *field, unsigned int id,
1085                       unsigned int *val);
1086int regmap_fields_update_bits_base(struct regmap_field *field,  unsigned int id,
1087                                   unsigned int mask, unsigned int val,
1088                                   bool *change, bool async, bool force);
1089/**
1090 * struct regmap_irq_type - IRQ type definitions.
1091 *
1092 * @type_reg_offset: Offset register for the irq type setting.
1093 * @type_rising_val: Register value to configure RISING type irq.
1094 * @type_falling_val: Register value to configure FALLING type irq.
1095 * @type_level_low_val: Register value to configure LEVEL_LOW type irq.
1096 * @type_level_high_val: Register value to configure LEVEL_HIGH type irq.
1097 * @types_supported: logical OR of IRQ_TYPE_* flags indicating supported types.
1098 */
1099struct regmap_irq_type {
1100        unsigned int type_reg_offset;
1101        unsigned int type_reg_mask;
1102        unsigned int type_rising_val;
1103        unsigned int type_falling_val;
1104        unsigned int type_level_low_val;
1105        unsigned int type_level_high_val;
1106        unsigned int types_supported;
1107};
1108
1109/**
1110 * struct regmap_irq - Description of an IRQ for the generic regmap irq_chip.
1111 *
1112 * @reg_offset: Offset of the status/mask register within the bank
1113 * @mask:       Mask used to flag/control the register.
1114 * @type:       IRQ trigger type setting details if supported.
1115 */
1116struct regmap_irq {
1117        unsigned int reg_offset;
1118        unsigned int mask;
1119        struct regmap_irq_type type;
1120};
1121
1122#define REGMAP_IRQ_REG(_irq, _off, _mask)               \
1123        [_irq] = { .reg_offset = (_off), .mask = (_mask) }
1124
1125#define REGMAP_IRQ_REG_LINE(_id, _reg_bits) \
1126        [_id] = {                               \
1127                .mask = BIT((_id) % (_reg_bits)),       \
1128                .reg_offset = (_id) / (_reg_bits),      \
1129        }
1130
1131#define REGMAP_IRQ_MAIN_REG_OFFSET(arr)                         \
1132        { .num_regs = ARRAY_SIZE((arr)), .offset = &(arr)[0] }
1133
1134struct regmap_irq_sub_irq_map {
1135        unsigned int num_regs;
1136        unsigned int *offset;
1137};
1138
1139/**
1140 * struct regmap_irq_chip - Description of a generic regmap irq_chip.
1141 *
1142 * @name:        Descriptive name for IRQ controller.
1143 *
1144 * @main_status: Base main status register address. For chips which have
1145 *               interrupts arranged in separate sub-irq blocks with own IRQ
1146 *               registers and which have a main IRQ registers indicating
1147 *               sub-irq blocks with unhandled interrupts. For such chips fill
1148 *               sub-irq register information in status_base, mask_base and
1149 *               ack_base.
1150 * @num_main_status_bits: Should be given to chips where number of meaningfull
1151 *                        main status bits differs from num_regs.
1152 * @sub_reg_offsets: arrays of mappings from main register bits to sub irq
1153 *                   registers. First item in array describes the registers
1154 *                   for first main status bit. Second array for second bit etc.
1155 *                   Offset is given as sub register status offset to
1156 *                   status_base. Should contain num_regs arrays.
1157 *                   Can be provided for chips with more complex mapping than
1158 *                   1.st bit to 1.st sub-reg, 2.nd bit to 2.nd sub-reg, ...
1159 * @num_main_regs: Number of 'main status' irq registers for chips which have
1160 *                 main_status set.
1161 *
1162 * @status_base: Base status register address.
1163 * @mask_base:   Base mask register address.
1164 * @mask_writeonly: Base mask register is write only.
1165 * @unmask_base:  Base unmask register address. for chips who have
1166 *                separate mask and unmask registers
1167 * @ack_base:    Base ack address. If zero then the chip is clear on read.
1168 *               Using zero value is possible with @use_ack bit.
1169 * @wake_base:   Base address for wake enables.  If zero unsupported.
1170 * @type_base:   Base address for irq type.  If zero unsupported.
1171 * @irq_reg_stride:  Stride to use for chips where registers are not contiguous.
1172 * @init_ack_masked: Ack all masked interrupts once during initalization.
1173 * @mask_invert: Inverted mask register: cleared bits are masked out.
1174 * @use_ack:     Use @ack register even if it is zero.
1175 * @ack_invert:  Inverted ack register: cleared bits for ack.
1176 * @wake_invert: Inverted wake register: cleared bits are wake enabled.
1177 * @type_invert: Invert the type flags.
1178 * @type_in_mask: Use the mask registers for controlling irq type. For
1179 *                interrupts defining type_rising/falling_mask use mask_base
1180 *                for edge configuration and never update bits in type_base.
1181 * @clear_on_unmask: For chips with interrupts cleared on read: read the status
1182 *                   registers before unmasking interrupts to clear any bits
1183 *                   set when they were masked.
1184 * @runtime_pm:  Hold a runtime PM lock on the device when accessing it.
1185 *
1186 * @num_regs:    Number of registers in each control bank.
1187 * @irqs:        Descriptors for individual IRQs.  Interrupt numbers are
1188 *               assigned based on the index in the array of the interrupt.
1189 * @num_irqs:    Number of descriptors.
1190 * @num_type_reg:    Number of type registers.
1191 * @type_reg_stride: Stride to use for chips where type registers are not
1192 *                      contiguous.
1193 * @handle_pre_irq:  Driver specific callback to handle interrupt from device
1194 *                   before regmap_irq_handler process the interrupts.
1195 * @handle_post_irq: Driver specific callback to handle interrupt from device
1196 *                   after handling the interrupts in regmap_irq_handler().
1197 * @irq_drv_data:    Driver specific IRQ data which is passed as parameter when
1198 *                   driver specific pre/post interrupt handler is called.
1199 *
1200 * This is not intended to handle every possible interrupt controller, but
1201 * it should handle a substantial proportion of those that are found in the
1202 * wild.
1203 */
1204struct regmap_irq_chip {
1205        const char *name;
1206
1207        unsigned int main_status;
1208        unsigned int num_main_status_bits;
1209        struct regmap_irq_sub_irq_map *sub_reg_offsets;
1210        int num_main_regs;
1211
1212        unsigned int status_base;
1213        unsigned int mask_base;
1214        unsigned int unmask_base;
1215        unsigned int ack_base;
1216        unsigned int wake_base;
1217        unsigned int type_base;
1218        unsigned int irq_reg_stride;
1219        bool mask_writeonly:1;
1220        bool init_ack_masked:1;
1221        bool mask_invert:1;
1222        bool use_ack:1;
1223        bool ack_invert:1;
1224        bool wake_invert:1;
1225        bool runtime_pm:1;
1226        bool type_invert:1;
1227        bool type_in_mask:1;
1228        bool clear_on_unmask:1;
1229
1230        int num_regs;
1231
1232        const struct regmap_irq *irqs;
1233        int num_irqs;
1234
1235        int num_type_reg;
1236        unsigned int type_reg_stride;
1237
1238        int (*handle_pre_irq)(void *irq_drv_data);
1239        int (*handle_post_irq)(void *irq_drv_data);
1240        void *irq_drv_data;
1241};
1242
1243struct regmap_irq_chip_data;
1244
1245int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
1246                        int irq_base, const struct regmap_irq_chip *chip,
1247                        struct regmap_irq_chip_data **data);
1248void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *data);
1249
1250int devm_regmap_add_irq_chip(struct device *dev, struct regmap *map, int irq,
1251                             int irq_flags, int irq_base,
1252                             const struct regmap_irq_chip *chip,
1253                             struct regmap_irq_chip_data **data);
1254void devm_regmap_del_irq_chip(struct device *dev, int irq,
1255                              struct regmap_irq_chip_data *data);
1256
1257int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data);
1258int regmap_irq_get_virq(struct regmap_irq_chip_data *data, int irq);
1259struct irq_domain *regmap_irq_get_domain(struct regmap_irq_chip_data *data);
1260
1261#else
1262
1263/*
1264 * These stubs should only ever be called by generic code which has
1265 * regmap based facilities, if they ever get called at runtime
1266 * something is going wrong and something probably needs to select
1267 * REGMAP.
1268 */
1269
1270static inline int regmap_write(struct regmap *map, unsigned int reg,
1271                               unsigned int val)
1272{
1273        WARN_ONCE(1, "regmap API is disabled");
1274        return -EINVAL;
1275}
1276
1277static inline int regmap_write_async(struct regmap *map, unsigned int reg,
1278                                     unsigned int val)
1279{
1280        WARN_ONCE(1, "regmap API is disabled");
1281        return -EINVAL;
1282}
1283
1284static inline int regmap_raw_write(struct regmap *map, unsigned int reg,
1285                                   const void *val, size_t val_len)
1286{
1287        WARN_ONCE(1, "regmap API is disabled");
1288        return -EINVAL;
1289}
1290
1291static inline int regmap_raw_write_async(struct regmap *map, unsigned int reg,
1292                                         const void *val, size_t val_len)
1293{
1294        WARN_ONCE(1, "regmap API is disabled");
1295        return -EINVAL;
1296}
1297
1298static inline int regmap_noinc_write(struct regmap *map, unsigned int reg,
1299                                    const void *val, size_t val_len)
1300{
1301        WARN_ONCE(1, "regmap API is disabled");
1302        return -EINVAL;
1303}
1304
1305static inline int regmap_bulk_write(struct regmap *map, unsigned int reg,
1306                                    const void *val, size_t val_count)
1307{
1308        WARN_ONCE(1, "regmap API is disabled");
1309        return -EINVAL;
1310}
1311
1312static inline int regmap_read(struct regmap *map, unsigned int reg,
1313                              unsigned int *val)
1314{
1315        WARN_ONCE(1, "regmap API is disabled");
1316        return -EINVAL;
1317}
1318
1319static inline int regmap_raw_read(struct regmap *map, unsigned int reg,
1320                                  void *val, size_t val_len)
1321{
1322        WARN_ONCE(1, "regmap API is disabled");
1323        return -EINVAL;
1324}
1325
1326static inline int regmap_noinc_read(struct regmap *map, unsigned int reg,
1327                                    void *val, size_t val_len)
1328{
1329        WARN_ONCE(1, "regmap API is disabled");
1330        return -EINVAL;
1331}
1332
1333static inline int regmap_bulk_read(struct regmap *map, unsigned int reg,
1334                                   void *val, size_t val_count)
1335{
1336        WARN_ONCE(1, "regmap API is disabled");
1337        return -EINVAL;
1338}
1339
1340static inline int regmap_update_bits_base(struct regmap *map, unsigned int reg,
1341                                          unsigned int mask, unsigned int val,
1342                                          bool *change, bool async, bool force)
1343{
1344        WARN_ONCE(1, "regmap API is disabled");
1345        return -EINVAL;
1346}
1347
1348static inline int regmap_field_update_bits_base(struct regmap_field *field,
1349                                        unsigned int mask, unsigned int val,
1350                                        bool *change, bool async, bool force)
1351{
1352        WARN_ONCE(1, "regmap API is disabled");
1353        return -EINVAL;
1354}
1355
1356static inline int regmap_fields_update_bits_base(struct regmap_field *field,
1357                                   unsigned int id,
1358                                   unsigned int mask, unsigned int val,
1359                                   bool *change, bool async, bool force)
1360{
1361        WARN_ONCE(1, "regmap API is disabled");
1362        return -EINVAL;
1363}
1364
1365static inline int regmap_get_val_bytes(struct regmap *map)
1366{
1367        WARN_ONCE(1, "regmap API is disabled");
1368        return -EINVAL;
1369}
1370
1371static inline int regmap_get_max_register(struct regmap *map)
1372{
1373        WARN_ONCE(1, "regmap API is disabled");
1374        return -EINVAL;
1375}
1376
1377static inline int regmap_get_reg_stride(struct regmap *map)
1378{
1379        WARN_ONCE(1, "regmap API is disabled");
1380        return -EINVAL;
1381}
1382
1383static inline int regcache_sync(struct regmap *map)
1384{
1385        WARN_ONCE(1, "regmap API is disabled");
1386        return -EINVAL;
1387}
1388
1389static inline int regcache_sync_region(struct regmap *map, unsigned int min,
1390                                       unsigned int max)
1391{
1392        WARN_ONCE(1, "regmap API is disabled");
1393        return -EINVAL;
1394}
1395
1396static inline int regcache_drop_region(struct regmap *map, unsigned int min,
1397                                       unsigned int max)
1398{
1399        WARN_ONCE(1, "regmap API is disabled");
1400        return -EINVAL;
1401}
1402
1403static inline void regcache_cache_only(struct regmap *map, bool enable)
1404{
1405        WARN_ONCE(1, "regmap API is disabled");
1406}
1407
1408static inline void regcache_cache_bypass(struct regmap *map, bool enable)
1409{
1410        WARN_ONCE(1, "regmap API is disabled");
1411}
1412
1413static inline void regcache_mark_dirty(struct regmap *map)
1414{
1415        WARN_ONCE(1, "regmap API is disabled");
1416}
1417
1418static inline void regmap_async_complete(struct regmap *map)
1419{
1420        WARN_ONCE(1, "regmap API is disabled");
1421}
1422
1423static inline int regmap_register_patch(struct regmap *map,
1424                                        const struct reg_sequence *regs,
1425                                        int num_regs)
1426{
1427        WARN_ONCE(1, "regmap API is disabled");
1428        return -EINVAL;
1429}
1430
1431static inline int regmap_parse_val(struct regmap *map, const void *buf,
1432                                unsigned int *val)
1433{
1434        WARN_ONCE(1, "regmap API is disabled");
1435        return -EINVAL;
1436}
1437
1438static inline struct regmap *dev_get_regmap(struct device *dev,
1439                                            const char *name)
1440{
1441        return NULL;
1442}
1443
1444static inline struct device *regmap_get_device(struct regmap *map)
1445{
1446        WARN_ONCE(1, "regmap API is disabled");
1447        return NULL;
1448}
1449
1450#endif
1451
1452#endif
1453