spi.c 713 B

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (c) 2011 The Chromium OS Authors.
  4. */
  5. #include <common.h>
  6. #include <fdtdec.h>
  7. #include <malloc.h>
  8. #include <spi.h>
  9. int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen)
  10. {
  11. if (wordlen == 0 || wordlen > 32) {
  12. printf("spi: invalid wordlen %u\n", wordlen);
  13. return -1;
  14. }
  15. slave->wordlen = wordlen;
  16. return 0;
  17. }
  18. void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
  19. unsigned int cs)
  20. {
  21. u8 *ptr;
  22. ptr = malloc(size);
  23. if (ptr) {
  24. struct spi_slave *slave;
  25. memset(ptr, '\0', size);
  26. slave = (struct spi_slave *)(ptr + offset);
  27. slave->bus = bus;
  28. slave->cs = cs;
  29. slave->wordlen = SPI_DEFAULT_WORDLEN;
  30. }
  31. return ptr;
  32. }