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