drivers/spi/spi.c

   1 /*
   2  * Copyright (c) 2011 The Chromium OS Authors.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <fdtdec.h>
   9 #include <malloc.h>
  10 #include <spi.h>
  11
  12 int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen)
  13 {
  14         if (wordlen == 0 || wordlen > 32) {
  15                 printf("spi: invalid wordlen %u\n", wordlen);
  16                 return -1;
  17         }
  18
  19         slave->wordlen = wordlen;
  20
  21         return 0;
  22 }
  23
  24 void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
  25                          unsigned int cs)
  26 {
  27         u8 *ptr;
  28
  29         ptr = malloc(size);
  30         if (ptr) {
  31                 struct spi_slave *slave;
  32
  33                 memset(ptr, '\0', size);
  34                 slave = (struct spi_slave *)(ptr + offset);
  35                 slave->bus = bus;
  36                 slave->cs = cs;
  37                 slave->wordlen = SPI_DEFAULT_WORDLEN;
  38         }
  39
  40         return ptr;
  41 }