1 /* 2 * Common SPI Interface: Controller-specific definitions 3 * 4 * (C) Copyright 2001 5 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com. 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #ifndef _SPI_H_ 11 #define _SPI_H_ 12 13 #include <common.h> 14 15 /* SPI mode flags */ 16 #define SPI_CPHA BIT(0) /* clock phase */ 17 #define SPI_CPOL BIT(1) /* clock polarity */ 18 #define SPI_MODE_0 (0|0) /* (original MicroWire) */ 19 #define SPI_MODE_1 (0|SPI_CPHA) 20 #define SPI_MODE_2 (SPI_CPOL|0) 21 #define SPI_MODE_3 (SPI_CPOL|SPI_CPHA) 22 #define SPI_CS_HIGH BIT(2) /* CS active high */ 23 #define SPI_LSB_FIRST BIT(3) /* per-word bits-on-wire */ 24 #define SPI_3WIRE BIT(4) /* SI/SO signals shared */ 25 #define SPI_LOOP BIT(5) /* loopback mode */ 26 #define SPI_SLAVE BIT(6) /* slave mode */ 27 #define SPI_PREAMBLE BIT(7) /* Skip preamble bytes */ 28 #define SPI_TX_BYTE BIT(8) /* transmit with 1 wire byte */ 29 #define SPI_TX_DUAL BIT(9) /* transmit with 2 wires */ 30 #define SPI_TX_QUAD BIT(10) /* transmit with 4 wires */ 31 #define SPI_RX_SLOW BIT(11) /* receive with 1 wire slow */ 32 #define SPI_RX_DUAL BIT(12) /* receive with 2 wires */ 33 #define SPI_RX_QUAD BIT(13) /* receive with 4 wires */ 34 35 /* Header byte that marks the start of the message */ 36 #define SPI_PREAMBLE_END_BYTE 0xec 37 38 #define SPI_DEFAULT_WORDLEN 8 39 40 #ifdef CONFIG_DM_SPI 41 /* TODO(sjg@chromium.org): Remove this and use max_hz from struct spi_slave */ 42 struct dm_spi_bus { 43 uint max_hz; 44 }; 45 46 /** 47 * struct dm_spi_platdata - platform data for all SPI slaves 48 * 49 * This describes a SPI slave, a child device of the SPI bus. To obtain this 50 * struct from a spi_slave, use dev_get_parent_platdata(dev) or 51 * dev_get_parent_platdata(slave->dev). 52 * 53 * This data is immuatable. Each time the device is probed, @max_hz and @mode 54 * will be copied to struct spi_slave. 55 * 56 * @cs: Chip select number (0..n-1) 57 * @max_hz: Maximum bus speed that this slave can tolerate 58 * @mode: SPI mode to use for this device (see SPI mode flags) 59 */ 60 struct dm_spi_slave_platdata { 61 unsigned int cs; 62 uint max_hz; 63 uint mode; 64 }; 65 66 #endif /* CONFIG_DM_SPI */ 67 68 /** 69 * struct spi_slave - Representation of a SPI slave 70 * 71 * For driver model this is the per-child data used by the SPI bus. It can 72 * be accessed using dev_get_parent_priv() on the slave device. The SPI uclass 73 * sets uip per_child_auto_alloc_size to sizeof(struct spi_slave), and the 74 * driver should not override it. Two platform data fields (max_hz and mode) 75 * are copied into this structure to provide an initial value. This allows 76 * them to be changed, since we should never change platform data in drivers. 77 * 78 * If not using driver model, drivers are expected to extend this with 79 * controller-specific data. 80 * 81 * @dev: SPI slave device 82 * @max_hz: Maximum speed for this slave 83 * @speed: Current bus speed. This is 0 until the bus is first 84 * claimed. 85 * @bus: ID of the bus that the slave is attached to. For 86 * driver model this is the sequence number of the SPI 87 * bus (bus->seq) so does not need to be stored 88 * @cs: ID of the chip select connected to the slave. 89 * @mode: SPI mode to use for this slave (see SPI mode flags) 90 * @wordlen: Size of SPI word in number of bits 91 * @max_read_size: If non-zero, the maximum number of bytes which can 92 * be read at once. 93 * @max_write_size: If non-zero, the maximum number of bytes which can 94 * be written at once. 95 * @memory_map: Address of read-only SPI flash access. 96 * @flags: Indication of SPI flags. 97 */ 98 struct spi_slave { 99 #ifdef CONFIG_DM_SPI 100 struct udevice *dev; /* struct spi_slave is dev->parentdata */ 101 uint max_hz; 102 uint speed; 103 #else 104 unsigned int bus; 105 unsigned int cs; 106 #endif 107 uint mode; 108 unsigned int wordlen; 109 unsigned int max_read_size; 110 unsigned int max_write_size; 111 void *memory_map; 112 u8 option; 113 114 u8 flags; 115 #define SPI_XFER_BEGIN BIT(0) /* Assert CS before transfer */ 116 #define SPI_XFER_END BIT(1) /* Deassert CS after transfer */ 117 #define SPI_XFER_ONCE (SPI_XFER_BEGIN | SPI_XFER_END) 118 #define SPI_XFER_MMAP BIT(2) /* Memory Mapped start */ 119 #define SPI_XFER_MMAP_END BIT(3) /* Memory Mapped End */ 120 }; 121 122 /** 123 * Initialization, must be called once on start up. 124 * 125 * TODO: I don't think we really need this. 126 */ 127 void spi_init(void); 128 129 /** 130 * spi_do_alloc_slave - Allocate a new SPI slave (internal) 131 * 132 * Allocate and zero all fields in the spi slave, and set the bus/chip 133 * select. Use the helper macro spi_alloc_slave() to call this. 134 * 135 * @offset: Offset of struct spi_slave within slave structure. 136 * @size: Size of slave structure. 137 * @bus: Bus ID of the slave chip. 138 * @cs: Chip select ID of the slave chip on the specified bus. 139 */ 140 void *spi_do_alloc_slave(int offset, int size, unsigned int bus, 141 unsigned int cs); 142 143 /** 144 * spi_alloc_slave - Allocate a new SPI slave 145 * 146 * Allocate and zero all fields in the spi slave, and set the bus/chip 147 * select. 148 * 149 * @_struct: Name of structure to allocate (e.g. struct tegra_spi). 150 * This structure must contain a member 'struct spi_slave *slave'. 151 * @bus: Bus ID of the slave chip. 152 * @cs: Chip select ID of the slave chip on the specified bus. 153 */ 154 #define spi_alloc_slave(_struct, bus, cs) \ 155 spi_do_alloc_slave(offsetof(_struct, slave), \ 156 sizeof(_struct), bus, cs) 157 158 /** 159 * spi_alloc_slave_base - Allocate a new SPI slave with no private data 160 * 161 * Allocate and zero all fields in the spi slave, and set the bus/chip 162 * select. 163 * 164 * @bus: Bus ID of the slave chip. 165 * @cs: Chip select ID of the slave chip on the specified bus. 166 */ 167 #define spi_alloc_slave_base(bus, cs) \ 168 spi_do_alloc_slave(0, sizeof(struct spi_slave), bus, cs) 169 170 /** 171 * Set up communications parameters for a SPI slave. 172 * 173 * This must be called once for each slave. Note that this function 174 * usually doesn't touch any actual hardware, it only initializes the 175 * contents of spi_slave so that the hardware can be easily 176 * initialized later. 177 * 178 * @bus: Bus ID of the slave chip. 179 * @cs: Chip select ID of the slave chip on the specified bus. 180 * @max_hz: Maximum SCK rate in Hz. 181 * @mode: Clock polarity, clock phase and other parameters. 182 * 183 * Returns: A spi_slave reference that can be used in subsequent SPI 184 * calls, or NULL if one or more of the parameters are not supported. 185 */ 186 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, 187 unsigned int max_hz, unsigned int mode); 188 189 /** 190 * Free any memory associated with a SPI slave. 191 * 192 * @slave: The SPI slave 193 */ 194 void spi_free_slave(struct spi_slave *slave); 195 196 /** 197 * Claim the bus and prepare it for communication with a given slave. 198 * 199 * This must be called before doing any transfers with a SPI slave. It 200 * will enable and initialize any SPI hardware as necessary, and make 201 * sure that the SCK line is in the correct idle state. It is not 202 * allowed to claim the same bus for several slaves without releasing 203 * the bus in between. 204 * 205 * @slave: The SPI slave 206 * 207 * Returns: 0 if the bus was claimed successfully, or a negative value 208 * if it wasn't. 209 */ 210 int spi_claim_bus(struct spi_slave *slave); 211 212 /** 213 * Release the SPI bus 214 * 215 * This must be called once for every call to spi_claim_bus() after 216 * all transfers have finished. It may disable any SPI hardware as 217 * appropriate. 218 * 219 * @slave: The SPI slave 220 */ 221 void spi_release_bus(struct spi_slave *slave); 222 223 /** 224 * Set the word length for SPI transactions 225 * 226 * Set the word length (number of bits per word) for SPI transactions. 227 * 228 * @slave: The SPI slave 229 * @wordlen: The number of bits in a word 230 * 231 * Returns: 0 on success, -1 on failure. 232 */ 233 int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen); 234 235 /** 236 * SPI transfer 237 * 238 * This writes "bitlen" bits out the SPI MOSI port and simultaneously clocks 239 * "bitlen" bits in the SPI MISO port. That's just the way SPI works. 240 * 241 * The source of the outgoing bits is the "dout" parameter and the 242 * destination of the input bits is the "din" parameter. Note that "dout" 243 * and "din" can point to the same memory location, in which case the 244 * input data overwrites the output data (since both are buffered by 245 * temporary variables, this is OK). 246 * 247 * spi_xfer() interface: 248 * @slave: The SPI slave which will be sending/receiving the data. 249 * @bitlen: How many bits to write and read. 250 * @dout: Pointer to a string of bits to send out. The bits are 251 * held in a byte array and are sent MSB first. 252 * @din: Pointer to a string of bits that will be filled in. 253 * @flags: A bitwise combination of SPI_XFER_* flags. 254 * 255 * Returns: 0 on success, not 0 on failure 256 */ 257 int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, 258 void *din, unsigned long flags); 259 260 /* Copy memory mapped data */ 261 void spi_flash_copy_mmap(void *data, void *offset, size_t len); 262 263 /** 264 * Determine if a SPI chipselect is valid. 265 * This function is provided by the board if the low-level SPI driver 266 * needs it to determine if a given chipselect is actually valid. 267 * 268 * Returns: 1 if bus:cs identifies a valid chip on this board, 0 269 * otherwise. 270 */ 271 int spi_cs_is_valid(unsigned int bus, unsigned int cs); 272 273 #ifndef CONFIG_DM_SPI 274 /** 275 * Activate a SPI chipselect. 276 * This function is provided by the board code when using a driver 277 * that can't control its chipselects automatically (e.g. 278 * common/soft_spi.c). When called, it should activate the chip select 279 * to the device identified by "slave". 280 */ 281 void spi_cs_activate(struct spi_slave *slave); 282 283 /** 284 * Deactivate a SPI chipselect. 285 * This function is provided by the board code when using a driver 286 * that can't control its chipselects automatically (e.g. 287 * common/soft_spi.c). When called, it should deactivate the chip 288 * select to the device identified by "slave". 289 */ 290 void spi_cs_deactivate(struct spi_slave *slave); 291 292 /** 293 * Set transfer speed. 294 * This sets a new speed to be applied for next spi_xfer(). 295 * @slave: The SPI slave 296 * @hz: The transfer speed 297 */ 298 void spi_set_speed(struct spi_slave *slave, uint hz); 299 #endif 300 301 /** 302 * Write 8 bits, then read 8 bits. 303 * @slave: The SPI slave we're communicating with 304 * @byte: Byte to be written 305 * 306 * Returns: The value that was read, or a negative value on error. 307 * 308 * TODO: This function probably shouldn't be inlined. 309 */ 310 static inline int spi_w8r8(struct spi_slave *slave, unsigned char byte) 311 { 312 unsigned char dout[2]; 313 unsigned char din[2]; 314 int ret; 315 316 dout[0] = byte; 317 dout[1] = 0; 318 319 ret = spi_xfer(slave, 16, dout, din, SPI_XFER_BEGIN | SPI_XFER_END); 320 return ret < 0 ? ret : din[1]; 321 } 322 323 /** 324 * Set up a SPI slave for a particular device tree node 325 * 326 * This calls spi_setup_slave() with the correct bus number. Call 327 * spi_free_slave() to free it later. 328 * 329 * @param blob: Device tree blob 330 * @param slave_node: Slave node to use 331 * @param spi_node: SPI peripheral node to use 332 * @return pointer to new spi_slave structure 333 */ 334 struct spi_slave *spi_setup_slave_fdt(const void *blob, int slave_node, 335 int spi_node); 336 337 /** 338 * spi_base_setup_slave_fdt() - helper function to set up a SPI slace 339 * 340 * This decodes SPI properties from the slave node to determine the 341 * chip select and SPI parameters. 342 * 343 * @blob: Device tree blob 344 * @busnum: Bus number to use 345 * @node: Device tree node for the SPI bus 346 */ 347 struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum, 348 int node); 349 350 #ifdef CONFIG_DM_SPI 351 352 /** 353 * struct spi_cs_info - Information about a bus chip select 354 * 355 * @dev: Connected device, or NULL if none 356 */ 357 struct spi_cs_info { 358 struct udevice *dev; 359 }; 360 361 /** 362 * struct struct dm_spi_ops - Driver model SPI operations 363 * 364 * The uclass interface is implemented by all SPI devices which use 365 * driver model. 366 */ 367 struct dm_spi_ops { 368 /** 369 * Claim the bus and prepare it for communication. 370 * 371 * The device provided is the slave device. It's parent controller 372 * will be used to provide the communication. 373 * 374 * This must be called before doing any transfers with a SPI slave. It 375 * will enable and initialize any SPI hardware as necessary, and make 376 * sure that the SCK line is in the correct idle state. It is not 377 * allowed to claim the same bus for several slaves without releasing 378 * the bus in between. 379 * 380 * @dev: The SPI slave 381 * 382 * Returns: 0 if the bus was claimed successfully, or a negative value 383 * if it wasn't. 384 */ 385 int (*claim_bus)(struct udevice *dev); 386 387 /** 388 * Release the SPI bus 389 * 390 * This must be called once for every call to spi_claim_bus() after 391 * all transfers have finished. It may disable any SPI hardware as 392 * appropriate. 393 * 394 * @dev: The SPI slave 395 */ 396 int (*release_bus)(struct udevice *dev); 397 398 /** 399 * Set the word length for SPI transactions 400 * 401 * Set the word length (number of bits per word) for SPI transactions. 402 * 403 * @bus: The SPI slave 404 * @wordlen: The number of bits in a word 405 * 406 * Returns: 0 on success, -ve on failure. 407 */ 408 int (*set_wordlen)(struct udevice *dev, unsigned int wordlen); 409 410 /** 411 * SPI transfer 412 * 413 * This writes "bitlen" bits out the SPI MOSI port and simultaneously 414 * clocks "bitlen" bits in the SPI MISO port. That's just the way SPI 415 * works. 416 * 417 * The source of the outgoing bits is the "dout" parameter and the 418 * destination of the input bits is the "din" parameter. Note that 419 * "dout" and "din" can point to the same memory location, in which 420 * case the input data overwrites the output data (since both are 421 * buffered by temporary variables, this is OK). 422 * 423 * spi_xfer() interface: 424 * @dev: The slave device to communicate with 425 * @bitlen: How many bits to write and read. 426 * @dout: Pointer to a string of bits to send out. The bits are 427 * held in a byte array and are sent MSB first. 428 * @din: Pointer to a string of bits that will be filled in. 429 * @flags: A bitwise combination of SPI_XFER_* flags. 430 * 431 * Returns: 0 on success, not -1 on failure 432 */ 433 int (*xfer)(struct udevice *dev, unsigned int bitlen, const void *dout, 434 void *din, unsigned long flags); 435 436 /** 437 * Optimized handlers for SPI memory-like operations. 438 * 439 * Optimized/dedicated operations for interactions with SPI memory. This 440 * field is optional and should only be implemented if the controller 441 * has native support for memory like operations. 442 */ 443 const struct spi_controller_mem_ops *mem_ops; 444 445 /** 446 * Set transfer speed. 447 * This sets a new speed to be applied for next spi_xfer(). 448 * @bus: The SPI bus 449 * @hz: The transfer speed 450 * @return 0 if OK, -ve on error 451 */ 452 int (*set_speed)(struct udevice *bus, uint hz); 453 454 /** 455 * Set the SPI mode/flags 456 * 457 * It is unclear if we want to set speed and mode together instead 458 * of separately. 459 * 460 * @bus: The SPI bus 461 * @mode: Requested SPI mode (SPI_... flags) 462 * @return 0 if OK, -ve on error 463 */ 464 int (*set_mode)(struct udevice *bus, uint mode); 465 466 /** 467 * Get information on a chip select 468 * 469 * This is only called when the SPI uclass does not know about a 470 * chip select, i.e. it has no attached device. It gives the driver 471 * a chance to allow activity on that chip select even so. 472 * 473 * @bus: The SPI bus 474 * @cs: The chip select (0..n-1) 475 * @info: Returns information about the chip select, if valid. 476 * On entry info->dev is NULL 477 * @return 0 if OK (and @info is set up), -ENODEV if the chip select 478 * is invalid, other -ve value on error 479 */ 480 int (*cs_info)(struct udevice *bus, uint cs, struct spi_cs_info *info); 481 }; 482 483 struct dm_spi_emul_ops { 484 /** 485 * SPI transfer 486 * 487 * This writes "bitlen" bits out the SPI MOSI port and simultaneously 488 * clocks "bitlen" bits in the SPI MISO port. That's just the way SPI 489 * works. Here the device is a slave. 490 * 491 * The source of the outgoing bits is the "dout" parameter and the 492 * destination of the input bits is the "din" parameter. Note that 493 * "dout" and "din" can point to the same memory location, in which 494 * case the input data overwrites the output data (since both are 495 * buffered by temporary variables, this is OK). 496 * 497 * spi_xfer() interface: 498 * @slave: The SPI slave which will be sending/receiving the data. 499 * @bitlen: How many bits to write and read. 500 * @dout: Pointer to a string of bits sent to the device. The 501 * bits are held in a byte array and are sent MSB first. 502 * @din: Pointer to a string of bits that will be sent back to 503 * the master. 504 * @flags: A bitwise combination of SPI_XFER_* flags. 505 * 506 * Returns: 0 on success, not -1 on failure 507 */ 508 int (*xfer)(struct udevice *slave, unsigned int bitlen, 509 const void *dout, void *din, unsigned long flags); 510 }; 511 512 /** 513 * spi_find_bus_and_cs() - Find bus and slave devices by number 514 * 515 * Given a bus number and chip select, this finds the corresponding bus 516 * device and slave device. Neither device is activated by this function, 517 * although they may have been activated previously. 518 * 519 * @busnum: SPI bus number 520 * @cs: Chip select to look for 521 * @busp: Returns bus device 522 * @devp: Return slave device 523 * @return 0 if found, -ENODEV on error 524 */ 525 int spi_find_bus_and_cs(int busnum, int cs, struct udevice **busp, 526 struct udevice **devp); 527 528 /** 529 * spi_get_bus_and_cs() - Find and activate bus and slave devices by number 530 * 531 * Given a bus number and chip select, this finds the corresponding bus 532 * device and slave device. 533 * 534 * If no such slave exists, and drv_name is not NULL, then a new slave device 535 * is automatically bound on this chip select with requested speed and mode. 536 * 537 * Ths new slave device is probed ready for use with the speed and mode 538 * from platdata when available or the requested values. 539 * 540 * @busnum: SPI bus number 541 * @cs: Chip select to look for 542 * @speed: SPI speed to use for this slave when not available in platdata 543 * @mode: SPI mode to use for this slave when not available in platdata 544 * @drv_name: Name of driver to attach to this chip select 545 * @dev_name: Name of the new device thus created 546 * @busp: Returns bus device 547 * @devp: Return slave device 548 * @return 0 if found, -ve on error 549 */ 550 int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode, 551 const char *drv_name, const char *dev_name, 552 struct udevice **busp, struct spi_slave **devp); 553 554 /** 555 * spi_chip_select() - Get the chip select for a slave 556 * 557 * @return the chip select this slave is attached to 558 */ 559 int spi_chip_select(struct udevice *slave); 560 561 /** 562 * spi_find_chip_select() - Find the slave attached to chip select 563 * 564 * @bus: SPI bus to search 565 * @cs: Chip select to look for 566 * @devp: Returns the slave device if found 567 * @return 0 if found, -ENODEV on error 568 */ 569 int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp); 570 571 /** 572 * spi_slave_ofdata_to_platdata() - decode standard SPI platform data 573 * 574 * This decodes the speed and mode for a slave from a device tree node 575 * 576 * @blob: Device tree blob 577 * @node: Node offset to read from 578 * @plat: Place to put the decoded information 579 */ 580 int spi_slave_ofdata_to_platdata(struct udevice *dev, 581 struct dm_spi_slave_platdata *plat); 582 583 /** 584 * spi_cs_info() - Check information on a chip select 585 * 586 * This checks a particular chip select on a bus to see if it has a device 587 * attached, or is even valid. 588 * 589 * @bus: The SPI bus 590 * @cs: The chip select (0..n-1) 591 * @info: Returns information about the chip select, if valid 592 * @return 0 if OK (and @info is set up), -ENODEV if the chip select 593 * is invalid, other -ve value on error 594 */ 595 int spi_cs_info(struct udevice *bus, uint cs, struct spi_cs_info *info); 596 597 struct sandbox_state; 598 599 /** 600 * sandbox_spi_get_emul() - get an emulator for a SPI slave 601 * 602 * This provides a way to attach an emulated SPI device to a particular SPI 603 * slave, so that xfer() operations on the slave will be handled by the 604 * emulator. If a emulator already exists on that chip select it is returned. 605 * Otherwise one is created. 606 * 607 * @state: Sandbox state 608 * @bus: SPI bus requesting the emulator 609 * @slave: SPI slave device requesting the emulator 610 * @emuip: Returns pointer to emulator 611 * @return 0 if OK, -ve on error 612 */ 613 int sandbox_spi_get_emul(struct sandbox_state *state, 614 struct udevice *bus, struct udevice *slave, 615 struct udevice **emulp); 616 617 /** 618 * Claim the bus and prepare it for communication with a given slave. 619 * 620 * This must be called before doing any transfers with a SPI slave. It 621 * will enable and initialize any SPI hardware as necessary, and make 622 * sure that the SCK line is in the correct idle state. It is not 623 * allowed to claim the same bus for several slaves without releasing 624 * the bus in between. 625 * 626 * @dev: The SPI slave device 627 * 628 * Returns: 0 if the bus was claimed successfully, or a negative value 629 * if it wasn't. 630 */ 631 int dm_spi_claim_bus(struct udevice *dev); 632 633 /** 634 * Release the SPI bus 635 * 636 * This must be called once for every call to dm_spi_claim_bus() after 637 * all transfers have finished. It may disable any SPI hardware as 638 * appropriate. 639 * 640 * @slave: The SPI slave device 641 */ 642 void dm_spi_release_bus(struct udevice *dev); 643 644 /** 645 * SPI transfer 646 * 647 * This writes "bitlen" bits out the SPI MOSI port and simultaneously clocks 648 * "bitlen" bits in the SPI MISO port. That's just the way SPI works. 649 * 650 * The source of the outgoing bits is the "dout" parameter and the 651 * destination of the input bits is the "din" parameter. Note that "dout" 652 * and "din" can point to the same memory location, in which case the 653 * input data overwrites the output data (since both are buffered by 654 * temporary variables, this is OK). 655 * 656 * dm_spi_xfer() interface: 657 * @dev: The SPI slave device which will be sending/receiving the data. 658 * @bitlen: How many bits to write and read. 659 * @dout: Pointer to a string of bits to send out. The bits are 660 * held in a byte array and are sent MSB first. 661 * @din: Pointer to a string of bits that will be filled in. 662 * @flags: A bitwise combination of SPI_XFER_* flags. 663 * 664 * Returns: 0 on success, not 0 on failure 665 */ 666 int dm_spi_xfer(struct udevice *dev, unsigned int bitlen, 667 const void *dout, void *din, unsigned long flags); 668 669 /* Access the operations for a SPI device */ 670 #define spi_get_ops(dev) ((struct dm_spi_ops *)(dev)->driver->ops) 671 #define spi_emul_get_ops(dev) ((struct dm_spi_emul_ops *)(dev)->driver->ops) 672 #endif /* CONFIG_DM_SPI */ 673 674 #endif /* _SPI_H_ */ 675