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