include/linux/regmap.h

   1 #ifndef __LINUX_REGMAP_H
   2 #define __LINUX_REGMAP_H
   3
   4 /*
   5  * Register map access API
   6  *
   7  * Copyright 2011 Wolfson Microelectronics plc
   8  *
   9  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/list.h>
  17 #include <linux/rbtree.h>
  18 #include <linux/err.h>
  19 #include <linux/bug.h>
  20
  21 struct module;
  22 struct device;
  23 struct i2c_client;
  24 struct irq_domain;
  25 struct spi_device;
  26 struct spmi_device;
  27 struct regmap;
  28 struct regmap_range_cfg;
  29 struct regmap_field;
  30
  31 /* An enum of all the supported cache types */
  32 enum regcache_type {
  33         REGCACHE_NONE,
  34         REGCACHE_RBTREE,
  35         REGCACHE_COMPRESSED,
  36         REGCACHE_FLAT,
  37 };
  38
  39 /**
  40  * Default value for a register.  We use an array of structs rather
  41  * than a simple array as many modern devices have very sparse
  42  * register maps.
  43  *
  44  * @reg: Register address.
  45  * @def: Register default value.
  46  */
  47 struct reg_default {
  48         unsigned int reg;
  49         unsigned int def;
  50 };
  51
  52 #ifdef CONFIG_REGMAP
  53
  54 enum regmap_endian {
  55         /* Unspecified -> 0 -> Backwards compatible default */
  56         REGMAP_ENDIAN_DEFAULT = 0,
  57         REGMAP_ENDIAN_BIG,
  58         REGMAP_ENDIAN_LITTLE,
  59         REGMAP_ENDIAN_NATIVE,
  60 };
  61
  62 /**
  63  * A register range, used for access related checks
  64  * (readable/writeable/volatile/precious checks)
  65  *
  66  * @range_min: address of first register
  67  * @range_max: address of last register
  68  */
  69 struct regmap_range {
  70         unsigned int range_min;
  71         unsigned int range_max;
  72 };
  73
  74 #define regmap_reg_range(low, high) { .range_min = low, .range_max = high, }
  75
  76 /*
  77  * A table of ranges including some yes ranges and some no ranges.
  78  * If a register belongs to a no_range, the corresponding check function
  79  * will return false. If a register belongs to a yes range, the corresponding
  80  * check function will return true. "no_ranges" are searched first.
  81  *
  82  * @yes_ranges : pointer to an array of regmap ranges used as "yes ranges"
  83  * @n_yes_ranges: size of the above array
  84  * @no_ranges: pointer to an array of regmap ranges used as "no ranges"
  85  * @n_no_ranges: size of the above array
  86  */
  87 struct regmap_access_table {
  88         const struct regmap_range *yes_ranges;
  89         unsigned int n_yes_ranges;
  90         const struct regmap_range *no_ranges;
  91         unsigned int n_no_ranges;
  92 };
  93
  94 typedef void (*regmap_lock)(void *);
  95 typedef void (*regmap_unlock)(void *);
  96
  97 /**
  98  * Configuration for the register map of a device.
  99  *
 100  * @name: Optional name of the regmap. Useful when a device has multiple
 101  *        register regions.
 102  *
 103  * @reg_bits: Number of bits in a register address, mandatory.
 104  * @reg_stride: The register address stride. Valid register addresses are a
 105  *              multiple of this value. If set to 0, a value of 1 will be
 106  *              used.
 107  * @pad_bits: Number of bits of padding between register and value.
 108  * @val_bits: Number of bits in a register value, mandatory.
 109  *
 110  * @writeable_reg: Optional callback returning true if the register
 111  *                 can be written to. If this field is NULL but wr_table
 112  *                 (see below) is not, the check is performed on such table
 113  *                 (a register is writeable if it belongs to one of the ranges
 114  *                  specified by wr_table).
 115  * @readable_reg: Optional callback returning true if the register
 116  *                can be read from. If this field is NULL but rd_table
 117  *                 (see below) is not, the check is performed on such table
 118  *                 (a register is readable if it belongs to one of the ranges
 119  *                  specified by rd_table).
 120  * @volatile_reg: Optional callback returning true if the register
 121  *                value can't be cached. If this field is NULL but
 122  *                volatile_table (see below) is not, the check is performed on
 123  *                such table (a register is volatile if it belongs to one of
 124  *                the ranges specified by volatile_table).
 125  * @precious_reg: Optional callback returning true if the register
 126  *                should not be read outside of a call from the driver
 127  *                (e.g., a clear on read interrupt status register). If this
 128  *                field is NULL but precious_table (see below) is not, the
 129  *                check is performed on such table (a register is precious if
 130  *                it belongs to one of the ranges specified by precious_table).
 131  * @lock:         Optional lock callback (overrides regmap's default lock
 132  *                function, based on spinlock or mutex).
 133  * @unlock:       As above for unlocking.
 134  * @lock_arg:     this field is passed as the only argument of lock/unlock
 135  *                functions (ignored in case regular lock/unlock functions
 136  *                are not overridden).
 137  * @reg_read:     Optional callback that if filled will be used to perform
 138  *                all the reads from the registers. Should only be provided for
 139  *                devices whose read operation cannot be represented as a simple
 140  *                read operation on a bus such as SPI, I2C, etc. Most of the
 141  *                devices do not need this.
 142  * @reg_write:    Same as above for writing.
 143  * @fast_io:      Register IO is fast. Use a spinlock instead of a mutex
 144  *                to perform locking. This field is ignored if custom lock/unlock
 145  *                functions are used (see fields lock/unlock of struct regmap_config).
 146  *                This field is a duplicate of a similar file in
 147  *                'struct regmap_bus' and serves exact same purpose.
 148  *                 Use it only for "no-bus" cases.
 149  * @max_register: Optional, specifies the maximum valid register index.
 150  * @wr_table:     Optional, points to a struct regmap_access_table specifying
 151  *                valid ranges for write access.
 152  * @rd_table:     As above, for read access.
 153  * @volatile_table: As above, for volatile registers.
 154  * @precious_table: As above, for precious registers.
 155  * @reg_defaults: Power on reset values for registers (for use with
 156  *                register cache support).
 157  * @num_reg_defaults: Number of elements in reg_defaults.
 158  *
 159  * @read_flag_mask: Mask to be set in the top byte of the register when doing
 160  *                  a read.
 161  * @write_flag_mask: Mask to be set in the top byte of the register when doing
 162  *                   a write. If both read_flag_mask and write_flag_mask are
 163  *                   empty the regmap_bus default masks are used.
 164  * @use_single_rw: If set, converts the bulk read and write operations into
 165  *                  a series of single read and write operations. This is useful
 166  *                  for device that does not support bulk read and write.
 167  *
 168  * @cache_type: The actual cache type.
 169  * @reg_defaults_raw: Power on reset values for registers (for use with
 170  *                    register cache support).
 171  * @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
 172  * @reg_format_endian: Endianness for formatted register addresses. If this is
 173  *                     DEFAULT, the @reg_format_endian_default value from the
 174  *                     regmap bus is used.
 175  * @val_format_endian: Endianness for formatted register values. If this is
 176  *                     DEFAULT, the @reg_format_endian_default value from the
 177  *                     regmap bus is used.
 178  *
 179  * @ranges: Array of configuration entries for virtual address ranges.
 180  * @num_ranges: Number of range configuration entries.
 181  */
 182 struct regmap_config {
 183         const char *name;
 184
 185         int reg_bits;
 186         int reg_stride;
 187         int pad_bits;
 188         int val_bits;
 189
 190         bool (*writeable_reg)(struct device *dev, unsigned int reg);
 191         bool (*readable_reg)(struct device *dev, unsigned int reg);
 192         bool (*volatile_reg)(struct device *dev, unsigned int reg);
 193         bool (*precious_reg)(struct device *dev, unsigned int reg);
 194         regmap_lock lock;
 195         regmap_unlock unlock;
 196         void *lock_arg;
 197
 198         int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
 199         int (*reg_write)(void *context, unsigned int reg, unsigned int val);
 200
 201         bool fast_io;
 202
 203         unsigned int max_register;
 204         const struct regmap_access_table *wr_table;
 205         const struct regmap_access_table *rd_table;
 206         const struct regmap_access_table *volatile_table;
 207         const struct regmap_access_table *precious_table;
 208         const struct reg_default *reg_defaults;
 209         unsigned int num_reg_defaults;
 210         enum regcache_type cache_type;
 211         const void *reg_defaults_raw;
 212         unsigned int num_reg_defaults_raw;
 213
 214         u8 read_flag_mask;
 215         u8 write_flag_mask;
 216
 217         bool use_single_rw;
 218
 219         enum regmap_endian reg_format_endian;
 220         enum regmap_endian val_format_endian;
 221
 222         const struct regmap_range_cfg *ranges;
 223         unsigned int num_ranges;
 224 };
 225
 226 /**
 227  * Configuration for indirectly accessed or paged registers.
 228  * Registers, mapped to this virtual range, are accessed in two steps:
 229  *     1. page selector register update;
 230  *     2. access through data window registers.
 231  *
 232  * @name: Descriptive name for diagnostics
 233  *
 234  * @range_min: Address of the lowest register address in virtual range.
 235  * @range_max: Address of the highest register in virtual range.
 236  *
 237  * @page_sel_reg: Register with selector field.
 238  * @page_sel_mask: Bit shift for selector value.
 239  * @page_sel_shift: Bit mask for selector value.
 240  *
 241  * @window_start: Address of first (lowest) register in data window.
 242  * @window_len: Number of registers in data window.
 243  */
 244 struct regmap_range_cfg {
 245         const char *name;
 246
 247         /* Registers of virtual address range */
 248         unsigned int range_min;
 249         unsigned int range_max;
 250
 251         /* Page selector for indirect addressing */
 252         unsigned int selector_reg;
 253         unsigned int selector_mask;
 254         int selector_shift;
 255
 256         /* Data window (per each page) */
 257         unsigned int window_start;
 258         unsigned int window_len;
 259 };
 260
 261 struct regmap_async;
 262
 263 typedef int (*regmap_hw_write)(void *context, const void *data,
 264                                size_t count);
 265 typedef int (*regmap_hw_gather_write)(void *context,
 266                                       const void *reg, size_t reg_len,
 267                                       const void *val, size_t val_len);
 268 typedef int (*regmap_hw_async_write)(void *context,
 269                                      const void *reg, size_t reg_len,
 270                                      const void *val, size_t val_len,
 271                                      struct regmap_async *async);
 272 typedef int (*regmap_hw_read)(void *context,
 273                               const void *reg_buf, size_t reg_size,
 274                               void *val_buf, size_t val_size);
 275 typedef struct regmap_async *(*regmap_hw_async_alloc)(void);
 276 typedef void (*regmap_hw_free_context)(void *context);
 277
 278 /**
 279  * Description of a hardware bus for the register map infrastructure.
 280  *
 281  * @fast_io: Register IO is fast. Use a spinlock instead of a mutex
 282  *           to perform locking. This field is ignored if custom lock/unlock
 283  *           functions are used (see fields lock/unlock of
 284  *           struct regmap_config).
 285  * @write: Write operation.
 286  * @gather_write: Write operation with split register/value, return -ENOTSUPP
 287  *                if not implemented  on a given device.
 288  * @async_write: Write operation which completes asynchronously, optional and
 289  *               must serialise with respect to non-async I/O.
 290  * @read: Read operation.  Data is returned in the buffer used to transmit
 291  *         data.
 292  * @async_alloc: Allocate a regmap_async() structure.
 293  * @read_flag_mask: Mask to be set in the top byte of the register when doing
 294  *                  a read.
 295  * @reg_format_endian_default: Default endianness for formatted register
 296  *     addresses. Used when the regmap_config specifies DEFAULT. If this is
 297  *     DEFAULT, BIG is assumed.
 298  * @val_format_endian_default: Default endianness for formatted register
 299  *     values. Used when the regmap_config specifies DEFAULT. If this is
 300  *     DEFAULT, BIG is assumed.
 301  * @async_size: Size of struct used for async work.
 302  */
 303 struct regmap_bus {
 304         bool fast_io;
 305         regmap_hw_write write;
 306         regmap_hw_gather_write gather_write;
 307         regmap_hw_async_write async_write;
 308         regmap_hw_read read;
 309         regmap_hw_free_context free_context;
 310         regmap_hw_async_alloc async_alloc;
 311         u8 read_flag_mask;
 312         enum regmap_endian reg_format_endian_default;
 313         enum regmap_endian val_format_endian_default;
 314 };
 315
 316 struct regmap *regmap_init(struct device *dev,
 317                            const struct regmap_bus *bus,
 318                            void *bus_context,
 319                            const struct regmap_config *config);
 320 struct regmap *regmap_init_i2c(struct i2c_client *i2c,
 321                                const struct regmap_config *config);
 322 struct regmap *regmap_init_spi(struct spi_device *dev,
 323                                const struct regmap_config *config);
 324 struct regmap *regmap_init_spmi(struct spmi_device *dev,
 325                                const struct regmap_config *config);
 326 struct regmap *regmap_init_mmio_clk(struct device *dev, const char *clk_id,
 327                                     void __iomem *regs,
 328                                     const struct regmap_config *config);
 329
 330 struct regmap *devm_regmap_init(struct device *dev,
 331                                 const struct regmap_bus *bus,
 332                                 void *bus_context,
 333                                 const struct regmap_config *config);
 334 struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
 335                                     const struct regmap_config *config);
 336 struct regmap *devm_regmap_init_spi(struct spi_device *dev,
 337                                     const struct regmap_config *config);
 338 struct regmap *devm_regmap_init_spmi(struct spmi_device *dev,
 339                                      const struct regmap_config *config);
 340 struct regmap *devm_regmap_init_mmio_clk(struct device *dev, const char *clk_id,
 341                                          void __iomem *regs,
 342                                          const struct regmap_config *config);
 343
 344 /**
 345  * regmap_init_mmio(): Initialise register map
 346  *
 347  * @dev: Device that will be interacted with
 348  * @regs: Pointer to memory-mapped IO region
 349  * @config: Configuration for register map
 350  *
 351  * The return value will be an ERR_PTR() on error or a valid pointer to
 352  * a struct regmap.
 353  */
 354 static inline struct regmap *regmap_init_mmio(struct device *dev,
 355                                         void __iomem *regs,
 356                                         const struct regmap_config *config)
 357 {
 358         return regmap_init_mmio_clk(dev, NULL, regs, config);
 359 }
 360
 361 /**
 362  * devm_regmap_init_mmio(): Initialise managed register map
 363  *
 364  * @dev: Device that will be interacted with
 365  * @regs: Pointer to memory-mapped IO region
 366  * @config: Configuration for register map
 367  *
 368  * The return value will be an ERR_PTR() on error or a valid pointer
 369  * to a struct regmap.  The regmap will be automatically freed by the
 370  * device management code.
 371  */
 372 static inline struct regmap *devm_regmap_init_mmio(struct device *dev,
 373                                         void __iomem *regs,
 374                                         const struct regmap_config *config)
 375 {
 376         return devm_regmap_init_mmio_clk(dev, NULL, regs, config);
 377 }
 378
 379 void regmap_exit(struct regmap *map);
 380 int regmap_reinit_cache(struct regmap *map,
 381                         const struct regmap_config *config);
 382 struct regmap *dev_get_regmap(struct device *dev, const char *name);
 383 int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
 384 int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val);
 385 int regmap_raw_write(struct regmap *map, unsigned int reg,
 386                      const void *val, size_t val_len);
 387 int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
 388                         size_t val_count);
 389 int regmap_multi_reg_write(struct regmap *map, struct reg_default *regs,
 390                         int num_regs);
 391 int regmap_raw_write_async(struct regmap *map, unsigned int reg,
 392                            const void *val, size_t val_len);
 393 int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val);
 394 int regmap_raw_read(struct regmap *map, unsigned int reg,
 395                     void *val, size_t val_len);
 396 int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 397                      size_t val_count);
 398 int regmap_update_bits(struct regmap *map, unsigned int reg,
 399                        unsigned int mask, unsigned int val);
 400 int regmap_update_bits_async(struct regmap *map, unsigned int reg,
 401                              unsigned int mask, unsigned int val);
 402 int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 403                              unsigned int mask, unsigned int val,
 404                              bool *change);
 405 int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 406                                    unsigned int mask, unsigned int val,
 407                                    bool *change);
 408 int regmap_get_val_bytes(struct regmap *map);
 409 int regmap_async_complete(struct regmap *map);
 410 bool regmap_can_raw_write(struct regmap *map);
 411
 412 int regcache_sync(struct regmap *map);
 413 int regcache_sync_region(struct regmap *map, unsigned int min,
 414                          unsigned int max);
 415 int regcache_drop_region(struct regmap *map, unsigned int min,
 416                          unsigned int max);
 417 void regcache_cache_only(struct regmap *map, bool enable);
 418 void regcache_cache_bypass(struct regmap *map, bool enable);
 419 void regcache_mark_dirty(struct regmap *map);
 420
 421 bool regmap_check_range_table(struct regmap *map, unsigned int reg,
 422                               const struct regmap_access_table *table);
 423
 424 int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
 425                           int num_regs);
 426 int regmap_parse_val(struct regmap *map, const void *buf,
 427                                 unsigned int *val);
 428
 429 static inline bool regmap_reg_in_range(unsigned int reg,
 430                                        const struct regmap_range *range)
 431 {
 432         return reg >= range->range_min && reg <= range->range_max;
 433 }
 434
 435 bool regmap_reg_in_ranges(unsigned int reg,
 436                           const struct regmap_range *ranges,
 437                           unsigned int nranges);
 438
 439 /**
 440  * Description of an register field
 441  *
 442  * @reg: Offset of the register within the regmap bank
 443  * @lsb: lsb of the register field.
 444  * @reg: msb of the register field.
 445  * @id_size: port size if it has some ports
 446  * @id_offset: address offset for each ports
 447  */
 448 struct reg_field {
 449         unsigned int reg;
 450         unsigned int lsb;
 451         unsigned int msb;
 452         unsigned int id_size;
 453         unsigned int id_offset;
 454 };
 455
 456 #define REG_FIELD(_reg, _lsb, _msb) {           \
 457                                 .reg = _reg,    \
 458                                 .lsb = _lsb,    \
 459                                 .msb = _msb,    \
 460                                 }
 461
 462 struct regmap_field *regmap_field_alloc(struct regmap *regmap,
 463                 struct reg_field reg_field);
 464 void regmap_field_free(struct regmap_field *field);
 465
 466 struct regmap_field *devm_regmap_field_alloc(struct device *dev,
 467                 struct regmap *regmap, struct reg_field reg_field);
 468 void devm_regmap_field_free(struct device *dev, struct regmap_field *field);
 469
 470 int regmap_field_read(struct regmap_field *field, unsigned int *val);
 471 int regmap_field_write(struct regmap_field *field, unsigned int val);
 472 int regmap_field_update_bits(struct regmap_field *field,
 473                              unsigned int mask, unsigned int val);
 474
 475 int regmap_fields_write(struct regmap_field *field, unsigned int id,
 476                         unsigned int val);
 477 int regmap_fields_read(struct regmap_field *field, unsigned int id,
 478                        unsigned int *val);
 479 int regmap_fields_update_bits(struct regmap_field *field,  unsigned int id,
 480                               unsigned int mask, unsigned int val);
 481
 482 /**
 483  * Description of an IRQ for the generic regmap irq_chip.
 484  *
 485  * @reg_offset: Offset of the status/mask register within the bank
 486  * @mask:       Mask used to flag/control the register.
 487  */
 488 struct regmap_irq {
 489         unsigned int reg_offset;
 490         unsigned int mask;
 491 };
 492
 493 /**
 494  * Description of a generic regmap irq_chip.  This is not intended to
 495  * handle every possible interrupt controller, but it should handle a
 496  * substantial proportion of those that are found in the wild.
 497  *
 498  * @name:        Descriptive name for IRQ controller.
 499  *
 500  * @status_base: Base status register address.
 501  * @mask_base:   Base mask register address.
 502  * @ack_base:    Base ack address. If zero then the chip is clear on read.
 503  *               Using zero value is possible with @use_ack bit.
 504  * @wake_base:   Base address for wake enables.  If zero unsupported.
 505  * @irq_reg_stride:  Stride to use for chips where registers are not contiguous.
 506  * @init_ack_masked: Ack all masked interrupts once during initalization.
 507  * @mask_invert: Inverted mask register: cleared bits are masked out.
 508  * @use_ack:     Use @ack register even if it is zero.
 509  * @wake_invert: Inverted wake register: cleared bits are wake enabled.
 510  * @runtime_pm:  Hold a runtime PM lock on the device when accessing it.
 511  *
 512  * @num_regs:    Number of registers in each control bank.
 513  * @irqs:        Descriptors for individual IRQs.  Interrupt numbers are
 514  *               assigned based on the index in the array of the interrupt.
 515  * @num_irqs:    Number of descriptors.
 516  */
 517 struct regmap_irq_chip {
 518         const char *name;
 519
 520         unsigned int status_base;
 521         unsigned int mask_base;
 522         unsigned int ack_base;
 523         unsigned int wake_base;
 524         unsigned int irq_reg_stride;
 525         bool init_ack_masked:1;
 526         bool mask_invert:1;
 527         bool use_ack:1;
 528         bool wake_invert:1;
 529         bool runtime_pm:1;
 530
 531         int num_regs;
 532
 533         const struct regmap_irq *irqs;
 534         int num_irqs;
 535 };
 536
 537 struct regmap_irq_chip_data;
 538
 539 int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 540                         int irq_base, const struct regmap_irq_chip *chip,
 541                         struct regmap_irq_chip_data **data);
 542 void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *data);
 543 int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data);
 544 int regmap_irq_get_virq(struct regmap_irq_chip_data *data, int irq);
 545 struct irq_domain *regmap_irq_get_domain(struct regmap_irq_chip_data *data);
 546
 547 #else
 548
 549 /*
 550  * These stubs should only ever be called by generic code which has
 551  * regmap based facilities, if they ever get called at runtime
 552  * something is going wrong and something probably needs to select
 553  * REGMAP.
 554  */
 555
 556 static inline int regmap_write(struct regmap *map, unsigned int reg,
 557                                unsigned int val)
 558 {
 559         WARN_ONCE(1, "regmap API is disabled");
 560         return -EINVAL;
 561 }
 562
 563 static inline int regmap_write_async(struct regmap *map, unsigned int reg,
 564                                      unsigned int val)
 565 {
 566         WARN_ONCE(1, "regmap API is disabled");
 567         return -EINVAL;
 568 }
 569
 570 static inline int regmap_raw_write(struct regmap *map, unsigned int reg,
 571                                    const void *val, size_t val_len)
 572 {
 573         WARN_ONCE(1, "regmap API is disabled");
 574         return -EINVAL;
 575 }
 576
 577 static inline int regmap_raw_write_async(struct regmap *map, unsigned int reg,
 578                                          const void *val, size_t val_len)
 579 {
 580         WARN_ONCE(1, "regmap API is disabled");
 581         return -EINVAL;
 582 }
 583
 584 static inline int regmap_bulk_write(struct regmap *map, unsigned int reg,
 585                                     const void *val, size_t val_count)
 586 {
 587         WARN_ONCE(1, "regmap API is disabled");
 588         return -EINVAL;
 589 }
 590
 591 static inline int regmap_read(struct regmap *map, unsigned int reg,
 592                               unsigned int *val)
 593 {
 594         WARN_ONCE(1, "regmap API is disabled");
 595         return -EINVAL;
 596 }
 597
 598 static inline int regmap_raw_read(struct regmap *map, unsigned int reg,
 599                                   void *val, size_t val_len)
 600 {
 601         WARN_ONCE(1, "regmap API is disabled");
 602         return -EINVAL;
 603 }
 604
 605 static inline int regmap_bulk_read(struct regmap *map, unsigned int reg,
 606                                    void *val, size_t val_count)
 607 {
 608         WARN_ONCE(1, "regmap API is disabled");
 609         return -EINVAL;
 610 }
 611
 612 static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
 613                                      unsigned int mask, unsigned int val)
 614 {
 615         WARN_ONCE(1, "regmap API is disabled");
 616         return -EINVAL;
 617 }
 618
 619 static inline int regmap_update_bits_async(struct regmap *map,
 620                                            unsigned int reg,
 621                                            unsigned int mask, unsigned int val)
 622 {
 623         WARN_ONCE(1, "regmap API is disabled");
 624         return -EINVAL;
 625 }
 626
 627 static inline int regmap_update_bits_check(struct regmap *map,
 628                                            unsigned int reg,
 629                                            unsigned int mask, unsigned int val,
 630                                            bool *change)
 631 {
 632         WARN_ONCE(1, "regmap API is disabled");
 633         return -EINVAL;
 634 }
 635
 636 static inline int regmap_update_bits_check_async(struct regmap *map,
 637                                                  unsigned int reg,
 638                                                  unsigned int mask,
 639                                                  unsigned int val,
 640                                                  bool *change)
 641 {
 642         WARN_ONCE(1, "regmap API is disabled");
 643         return -EINVAL;
 644 }
 645
 646 static inline int regmap_get_val_bytes(struct regmap *map)
 647 {
 648         WARN_ONCE(1, "regmap API is disabled");
 649         return -EINVAL;
 650 }
 651
 652 static inline int regcache_sync(struct regmap *map)
 653 {
 654         WARN_ONCE(1, "regmap API is disabled");
 655         return -EINVAL;
 656 }
 657
 658 static inline int regcache_sync_region(struct regmap *map, unsigned int min,
 659                                        unsigned int max)
 660 {
 661         WARN_ONCE(1, "regmap API is disabled");
 662         return -EINVAL;
 663 }
 664
 665 static inline int regcache_drop_region(struct regmap *map, unsigned int min,
 666                                        unsigned int max)
 667 {
 668         WARN_ONCE(1, "regmap API is disabled");
 669         return -EINVAL;
 670 }
 671
 672 static inline void regcache_cache_only(struct regmap *map, bool enable)
 673 {
 674         WARN_ONCE(1, "regmap API is disabled");
 675 }
 676
 677 static inline void regcache_cache_bypass(struct regmap *map, bool enable)
 678 {
 679         WARN_ONCE(1, "regmap API is disabled");
 680 }
 681
 682 static inline void regcache_mark_dirty(struct regmap *map)
 683 {
 684         WARN_ONCE(1, "regmap API is disabled");
 685 }
 686
 687 static inline void regmap_async_complete(struct regmap *map)
 688 {
 689         WARN_ONCE(1, "regmap API is disabled");
 690 }
 691
 692 static inline int regmap_register_patch(struct regmap *map,
 693                                         const struct reg_default *regs,
 694                                         int num_regs)
 695 {
 696         WARN_ONCE(1, "regmap API is disabled");
 697         return -EINVAL;
 698 }
 699
 700 static inline int regmap_parse_val(struct regmap *map, const void *buf,
 701                                 unsigned int *val)
 702 {
 703         WARN_ONCE(1, "regmap API is disabled");
 704         return -EINVAL;
 705 }
 706
 707 static inline struct regmap *dev_get_regmap(struct device *dev,
 708                                             const char *name)
 709 {
 710         return NULL;
 711 }
 712
 713 #endif
 714
 715 #endif