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  * @can_multi_write: If set, the device supports the multi write mode of bulk
 168  *                   write operations, if clear multi write requests will be
 169  *                   split into individual write operations
 170  *
 171  * @cache_type: The actual cache type.
 172  * @reg_defaults_raw: Power on reset values for registers (for use with
 173  *                    register cache support).
 174  * @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
 175  * @reg_format_endian: Endianness for formatted register addresses. If this is
 176  *                     DEFAULT, the @reg_format_endian_default value from the
 177  *                     regmap bus is used.
 178  * @val_format_endian: Endianness for formatted register values. If this is
 179  *                     DEFAULT, the @reg_format_endian_default value from the
 180  *                     regmap bus is used.
 181  *
 182  * @ranges: Array of configuration entries for virtual address ranges.
 183  * @num_ranges: Number of range configuration entries.
 184  */
 185 struct regmap_config {
 186         const char *name;
 187
 188         int reg_bits;
 189         int reg_stride;
 190         int pad_bits;
 191         int val_bits;
 192
 193         bool (*writeable_reg)(struct device *dev, unsigned int reg);
 194         bool (*readable_reg)(struct device *dev, unsigned int reg);
 195         bool (*volatile_reg)(struct device *dev, unsigned int reg);
 196         bool (*precious_reg)(struct device *dev, unsigned int reg);
 197         regmap_lock lock;
 198         regmap_unlock unlock;
 199         void *lock_arg;
 200
 201         int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
 202         int (*reg_write)(void *context, unsigned int reg, unsigned int val);
 203
 204         bool fast_io;
 205
 206         unsigned int max_register;
 207         const struct regmap_access_table *wr_table;
 208         const struct regmap_access_table *rd_table;
 209         const struct regmap_access_table *volatile_table;
 210         const struct regmap_access_table *precious_table;
 211         const struct reg_default *reg_defaults;
 212         unsigned int num_reg_defaults;
 213         enum regcache_type cache_type;
 214         const void *reg_defaults_raw;
 215         unsigned int num_reg_defaults_raw;
 216
 217         u8 read_flag_mask;
 218         u8 write_flag_mask;
 219
 220         bool use_single_rw;
 221         bool can_multi_write;
 222
 223         enum regmap_endian reg_format_endian;
 224         enum regmap_endian val_format_endian;
 225
 226         const struct regmap_range_cfg *ranges;
 227         unsigned int num_ranges;
 228 };
 229
 230 /**
 231  * Configuration for indirectly accessed or paged registers.
 232  * Registers, mapped to this virtual range, are accessed in two steps:
 233  *     1. page selector register update;
 234  *     2. access through data window registers.
 235  *
 236  * @name: Descriptive name for diagnostics
 237  *
 238  * @range_min: Address of the lowest register address in virtual range.
 239  * @range_max: Address of the highest register in virtual range.
 240  *
 241  * @page_sel_reg: Register with selector field.
 242  * @page_sel_mask: Bit shift for selector value.
 243  * @page_sel_shift: Bit mask for selector value.
 244  *
 245  * @window_start: Address of first (lowest) register in data window.
 246  * @window_len: Number of registers in data window.
 247  */
 248 struct regmap_range_cfg {
 249         const char *name;
 250
 251         /* Registers of virtual address range */
 252         unsigned int range_min;
 253         unsigned int range_max;
 254
 255         /* Page selector for indirect addressing */
 256         unsigned int selector_reg;
 257         unsigned int selector_mask;
 258         int selector_shift;
 259
 260         /* Data window (per each page) */
 261         unsigned int window_start;
 262         unsigned int window_len;
 263 };
 264
 265 struct regmap_async;
 266
 267 typedef int (*regmap_hw_write)(void *context, const void *data,
 268                                size_t count);
 269 typedef int (*regmap_hw_gather_write)(void *context,
 270                                       const void *reg, size_t reg_len,
 271                                       const void *val, size_t val_len);
 272 typedef int (*regmap_hw_async_write)(void *context,
 273                                      const void *reg, size_t reg_len,
 274                                      const void *val, size_t val_len,
 275                                      struct regmap_async *async);
 276 typedef int (*regmap_hw_read)(void *context,
 277                               const void *reg_buf, size_t reg_size,
 278                               void *val_buf, size_t val_size);
 279 typedef struct regmap_async *(*regmap_hw_async_alloc)(void);
 280 typedef void (*regmap_hw_free_context)(void *context);
 281
 282 /**
 283  * Description of a hardware bus for the register map infrastructure.
 284  *
 285  * @fast_io: Register IO is fast. Use a spinlock instead of a mutex
 286  *           to perform locking. This field is ignored if custom lock/unlock
 287  *           functions are used (see fields lock/unlock of
 288  *           struct regmap_config).
 289  * @write: Write operation.
 290  * @gather_write: Write operation with split register/value, return -ENOTSUPP
 291  *                if not implemented  on a given device.
 292  * @async_write: Write operation which completes asynchronously, optional and
 293  *               must serialise with respect to non-async I/O.
 294  * @read: Read operation.  Data is returned in the buffer used to transmit
 295  *         data.
 296  * @async_alloc: Allocate a regmap_async() structure.
 297  * @read_flag_mask: Mask to be set in the top byte of the register when doing
 298  *                  a read.
 299  * @reg_format_endian_default: Default endianness for formatted register
 300  *     addresses. Used when the regmap_config specifies DEFAULT. If this is
 301  *     DEFAULT, BIG is assumed.
 302  * @val_format_endian_default: Default endianness for formatted register
 303  *     values. Used when the regmap_config specifies DEFAULT. If this is
 304  *     DEFAULT, BIG is assumed.
 305  * @async_size: Size of struct used for async work.
 306  */
 307 struct regmap_bus {
 308         bool fast_io;
 309         regmap_hw_write write;
 310         regmap_hw_gather_write gather_write;
 311         regmap_hw_async_write async_write;
 312         regmap_hw_read read;
 313         regmap_hw_free_context free_context;
 314         regmap_hw_async_alloc async_alloc;
 315         u8 read_flag_mask;
 316         enum regmap_endian reg_format_endian_default;
 317         enum regmap_endian val_format_endian_default;
 318 };
 319
 320 struct regmap *regmap_init(struct device *dev,
 321                            const struct regmap_bus *bus,
 322                            void *bus_context,
 323                            const struct regmap_config *config);
 324 int regmap_attach_dev(struct device *dev, struct regmap *map,
 325                                  const struct regmap_config *config);
 326 struct regmap *regmap_init_i2c(struct i2c_client *i2c,
 327                                const struct regmap_config *config);
 328 struct regmap *regmap_init_spi(struct spi_device *dev,
 329                                const struct regmap_config *config);
 330 struct regmap *regmap_init_spmi(struct spmi_device *dev,
 331                                const struct regmap_config *config);
 332 struct regmap *regmap_init_mmio_clk(struct device *dev, const char *clk_id,
 333                                     void __iomem *regs,
 334                                     const struct regmap_config *config);
 335
 336 struct regmap *devm_regmap_init(struct device *dev,
 337                                 const struct regmap_bus *bus,
 338                                 void *bus_context,
 339                                 const struct regmap_config *config);
 340 struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
 341                                     const struct regmap_config *config);
 342 struct regmap *devm_regmap_init_spi(struct spi_device *dev,
 343                                     const struct regmap_config *config);
 344 struct regmap *devm_regmap_init_spmi(struct spmi_device *dev,
 345                                      const struct regmap_config *config);
 346 struct regmap *devm_regmap_init_mmio_clk(struct device *dev, const char *clk_id,
 347                                          void __iomem *regs,
 348                                          const struct regmap_config *config);
 349
 350 /**
 351  * regmap_init_mmio(): Initialise register map
 352  *
 353  * @dev: Device that will be interacted with
 354  * @regs: Pointer to memory-mapped IO region
 355  * @config: Configuration for register map
 356  *
 357  * The return value will be an ERR_PTR() on error or a valid pointer to
 358  * a struct regmap.
 359  */
 360 static inline struct regmap *regmap_init_mmio(struct device *dev,
 361                                         void __iomem *regs,
 362                                         const struct regmap_config *config)
 363 {
 364         return regmap_init_mmio_clk(dev, NULL, regs, config);
 365 }
 366
 367 /**
 368  * devm_regmap_init_mmio(): Initialise managed register map
 369  *
 370  * @dev: Device that will be interacted with
 371  * @regs: Pointer to memory-mapped IO region
 372  * @config: Configuration for register map
 373  *
 374  * The return value will be an ERR_PTR() on error or a valid pointer
 375  * to a struct regmap.  The regmap will be automatically freed by the
 376  * device management code.
 377  */
 378 static inline struct regmap *devm_regmap_init_mmio(struct device *dev,
 379                                         void __iomem *regs,
 380                                         const struct regmap_config *config)
 381 {
 382         return devm_regmap_init_mmio_clk(dev, NULL, regs, config);
 383 }
 384
 385 void regmap_exit(struct regmap *map);
 386 int regmap_reinit_cache(struct regmap *map,
 387                         const struct regmap_config *config);
 388 struct regmap *dev_get_regmap(struct device *dev, const char *name);
 389 int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
 390 int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val);
 391 int regmap_raw_write(struct regmap *map, unsigned int reg,
 392                      const void *val, size_t val_len);
 393 int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
 394                         size_t val_count);
 395 int regmap_multi_reg_write(struct regmap *map, const struct reg_default *regs,
 396                         int num_regs);
 397 int regmap_multi_reg_write_bypassed(struct regmap *map,
 398                                     const struct reg_default *regs,
 399                                     int num_regs);
 400 int regmap_raw_write_async(struct regmap *map, unsigned int reg,
 401                            const void *val, size_t val_len);
 402 int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val);
 403 int regmap_raw_read(struct regmap *map, unsigned int reg,
 404                     void *val, size_t val_len);
 405 int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 406                      size_t val_count);
 407 int regmap_update_bits(struct regmap *map, unsigned int reg,
 408                        unsigned int mask, unsigned int val);
 409 int regmap_update_bits_async(struct regmap *map, unsigned int reg,
 410                              unsigned int mask, unsigned int val);
 411 int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 412                              unsigned int mask, unsigned int val,
 413                              bool *change);
 414 int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 415                                    unsigned int mask, unsigned int val,
 416                                    bool *change);
 417 int regmap_get_val_bytes(struct regmap *map);
 418 int regmap_async_complete(struct regmap *map);
 419 bool regmap_can_raw_write(struct regmap *map);
 420
 421 int regcache_sync(struct regmap *map);
 422 int regcache_sync_region(struct regmap *map, unsigned int min,
 423                          unsigned int max);
 424 int regcache_drop_region(struct regmap *map, unsigned int min,
 425                          unsigned int max);
 426 void regcache_cache_only(struct regmap *map, bool enable);
 427 void regcache_cache_bypass(struct regmap *map, bool enable);
 428 void regcache_mark_dirty(struct regmap *map);
 429
 430 bool regmap_check_range_table(struct regmap *map, unsigned int reg,
 431                               const struct regmap_access_table *table);
 432
 433 int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
 434                           int num_regs);
 435 int regmap_parse_val(struct regmap *map, const void *buf,
 436                                 unsigned int *val);
 437
 438 static inline bool regmap_reg_in_range(unsigned int reg,
 439                                        const struct regmap_range *range)
 440 {
 441         return reg >= range->range_min && reg <= range->range_max;
 442 }
 443
 444 bool regmap_reg_in_ranges(unsigned int reg,
 445                           const struct regmap_range *ranges,
 446                           unsigned int nranges);
 447
 448 /**
 449  * Description of an register field
 450  *
 451  * @reg: Offset of the register within the regmap bank
 452  * @lsb: lsb of the register field.
 453  * @reg: msb of the register field.
 454  * @id_size: port size if it has some ports
 455  * @id_offset: address offset for each ports
 456  */
 457 struct reg_field {
 458         unsigned int reg;
 459         unsigned int lsb;
 460         unsigned int msb;
 461         unsigned int id_size;
 462         unsigned int id_offset;
 463 };
 464
 465 #define REG_FIELD(_reg, _lsb, _msb) {           \
 466                                 .reg = _reg,    \
 467                                 .lsb = _lsb,    \
 468                                 .msb = _msb,    \
 469                                 }
 470
 471 struct regmap_field *regmap_field_alloc(struct regmap *regmap,
 472                 struct reg_field reg_field);
 473 void regmap_field_free(struct regmap_field *field);
 474
 475 struct regmap_field *devm_regmap_field_alloc(struct device *dev,
 476                 struct regmap *regmap, struct reg_field reg_field);
 477 void devm_regmap_field_free(struct device *dev, struct regmap_field *field);
 478
 479 int regmap_field_read(struct regmap_field *field, unsigned int *val);
 480 int regmap_field_write(struct regmap_field *field, unsigned int val);
 481 int regmap_field_update_bits(struct regmap_field *field,
 482                              unsigned int mask, unsigned int val);
 483
 484 int regmap_fields_write(struct regmap_field *field, unsigned int id,
 485                         unsigned int val);
 486 int regmap_fields_read(struct regmap_field *field, unsigned int id,
 487                        unsigned int *val);
 488 int regmap_fields_update_bits(struct regmap_field *field,  unsigned int id,
 489                               unsigned int mask, unsigned int val);
 490
 491 /**
 492  * Description of an IRQ for the generic regmap irq_chip.
 493  *
 494  * @reg_offset: Offset of the status/mask register within the bank
 495  * @mask:       Mask used to flag/control the register.
 496  */
 497 struct regmap_irq {
 498         unsigned int reg_offset;
 499         unsigned int mask;
 500 };
 501
 502 /**
 503  * Description of a generic regmap irq_chip.  This is not intended to
 504  * handle every possible interrupt controller, but it should handle a
 505  * substantial proportion of those that are found in the wild.
 506  *
 507  * @name:        Descriptive name for IRQ controller.
 508  *
 509  * @status_base: Base status register address.
 510  * @mask_base:   Base mask register address.
 511  * @ack_base:    Base ack address. If zero then the chip is clear on read.
 512  *               Using zero value is possible with @use_ack bit.
 513  * @wake_base:   Base address for wake enables.  If zero unsupported.
 514  * @irq_reg_stride:  Stride to use for chips where registers are not contiguous.
 515  * @init_ack_masked: Ack all masked interrupts once during initalization.
 516  * @mask_invert: Inverted mask register: cleared bits are masked out.
 517  * @use_ack:     Use @ack register even if it is zero.
 518  * @wake_invert: Inverted wake register: cleared bits are wake enabled.
 519  * @runtime_pm:  Hold a runtime PM lock on the device when accessing it.
 520  *
 521  * @num_regs:    Number of registers in each control bank.
 522  * @irqs:        Descriptors for individual IRQs.  Interrupt numbers are
 523  *               assigned based on the index in the array of the interrupt.
 524  * @num_irqs:    Number of descriptors.
 525  */
 526 struct regmap_irq_chip {
 527         const char *name;
 528
 529         unsigned int status_base;
 530         unsigned int mask_base;
 531         unsigned int ack_base;
 532         unsigned int wake_base;
 533         unsigned int irq_reg_stride;
 534         bool init_ack_masked:1;
 535         bool mask_invert:1;
 536         bool use_ack:1;
 537         bool wake_invert:1;
 538         bool runtime_pm:1;
 539
 540         int num_regs;
 541
 542         const struct regmap_irq *irqs;
 543         int num_irqs;
 544 };
 545
 546 struct regmap_irq_chip_data;
 547
 548 int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 549                         int irq_base, const struct regmap_irq_chip *chip,
 550                         struct regmap_irq_chip_data **data);
 551 void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *data);
 552 int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data);
 553 int regmap_irq_get_virq(struct regmap_irq_chip_data *data, int irq);
 554 struct irq_domain *regmap_irq_get_domain(struct regmap_irq_chip_data *data);
 555
 556 #else
 557
 558 /*
 559  * These stubs should only ever be called by generic code which has
 560  * regmap based facilities, if they ever get called at runtime
 561  * something is going wrong and something probably needs to select
 562  * REGMAP.
 563  */
 564
 565 static inline int regmap_write(struct regmap *map, unsigned int reg,
 566                                unsigned int val)
 567 {
 568         WARN_ONCE(1, "regmap API is disabled");
 569         return -EINVAL;
 570 }
 571
 572 static inline int regmap_write_async(struct regmap *map, unsigned int reg,
 573                                      unsigned int val)
 574 {
 575         WARN_ONCE(1, "regmap API is disabled");
 576         return -EINVAL;
 577 }
 578
 579 static inline int regmap_raw_write(struct regmap *map, unsigned int reg,
 580                                    const void *val, size_t val_len)
 581 {
 582         WARN_ONCE(1, "regmap API is disabled");
 583         return -EINVAL;
 584 }
 585
 586 static inline int regmap_raw_write_async(struct regmap *map, unsigned int reg,
 587                                          const void *val, size_t val_len)
 588 {
 589         WARN_ONCE(1, "regmap API is disabled");
 590         return -EINVAL;
 591 }
 592
 593 static inline int regmap_bulk_write(struct regmap *map, unsigned int reg,
 594                                     const void *val, size_t val_count)
 595 {
 596         WARN_ONCE(1, "regmap API is disabled");
 597         return -EINVAL;
 598 }
 599
 600 static inline int regmap_read(struct regmap *map, unsigned int reg,
 601                               unsigned int *val)
 602 {
 603         WARN_ONCE(1, "regmap API is disabled");
 604         return -EINVAL;
 605 }
 606
 607 static inline int regmap_raw_read(struct regmap *map, unsigned int reg,
 608                                   void *val, size_t val_len)
 609 {
 610         WARN_ONCE(1, "regmap API is disabled");
 611         return -EINVAL;
 612 }
 613
 614 static inline int regmap_bulk_read(struct regmap *map, unsigned int reg,
 615                                    void *val, size_t val_count)
 616 {
 617         WARN_ONCE(1, "regmap API is disabled");
 618         return -EINVAL;
 619 }
 620
 621 static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
 622                                      unsigned int mask, unsigned int val)
 623 {
 624         WARN_ONCE(1, "regmap API is disabled");
 625         return -EINVAL;
 626 }
 627
 628 static inline int regmap_update_bits_async(struct regmap *map,
 629                                            unsigned int reg,
 630                                            unsigned int mask, unsigned int val)
 631 {
 632         WARN_ONCE(1, "regmap API is disabled");
 633         return -EINVAL;
 634 }
 635
 636 static inline int regmap_update_bits_check(struct regmap *map,
 637                                            unsigned int reg,
 638                                            unsigned int mask, unsigned int val,
 639                                            bool *change)
 640 {
 641         WARN_ONCE(1, "regmap API is disabled");
 642         return -EINVAL;
 643 }
 644
 645 static inline int regmap_update_bits_check_async(struct regmap *map,
 646                                                  unsigned int reg,
 647                                                  unsigned int mask,
 648                                                  unsigned int val,
 649                                                  bool *change)
 650 {
 651         WARN_ONCE(1, "regmap API is disabled");
 652         return -EINVAL;
 653 }
 654
 655 static inline int regmap_get_val_bytes(struct regmap *map)
 656 {
 657         WARN_ONCE(1, "regmap API is disabled");
 658         return -EINVAL;
 659 }
 660
 661 static inline int regcache_sync(struct regmap *map)
 662 {
 663         WARN_ONCE(1, "regmap API is disabled");
 664         return -EINVAL;
 665 }
 666
 667 static inline int regcache_sync_region(struct regmap *map, unsigned int min,
 668                                        unsigned int max)
 669 {
 670         WARN_ONCE(1, "regmap API is disabled");
 671         return -EINVAL;
 672 }
 673
 674 static inline int regcache_drop_region(struct regmap *map, unsigned int min,
 675                                        unsigned int max)
 676 {
 677         WARN_ONCE(1, "regmap API is disabled");
 678         return -EINVAL;
 679 }
 680
 681 static inline void regcache_cache_only(struct regmap *map, bool enable)
 682 {
 683         WARN_ONCE(1, "regmap API is disabled");
 684 }
 685
 686 static inline void regcache_cache_bypass(struct regmap *map, bool enable)
 687 {
 688         WARN_ONCE(1, "regmap API is disabled");
 689 }
 690
 691 static inline void regcache_mark_dirty(struct regmap *map)
 692 {
 693         WARN_ONCE(1, "regmap API is disabled");
 694 }
 695
 696 static inline void regmap_async_complete(struct regmap *map)
 697 {
 698         WARN_ONCE(1, "regmap API is disabled");
 699 }
 700
 701 static inline int regmap_register_patch(struct regmap *map,
 702                                         const struct reg_default *regs,
 703                                         int num_regs)
 704 {
 705         WARN_ONCE(1, "regmap API is disabled");
 706         return -EINVAL;
 707 }
 708
 709 static inline int regmap_parse_val(struct regmap *map, const void *buf,
 710                                 unsigned int *val)
 711 {
 712         WARN_ONCE(1, "regmap API is disabled");
 713         return -EINVAL;
 714 }
 715
 716 static inline struct regmap *dev_get_regmap(struct device *dev,
 717                                             const char *name)
 718 {
 719         return NULL;
 720 }
 721
 722 #endif
 723
 724 #endif