arch/arm/kernel/dma-dummy.c

   1 /*
   2  * arch/arm/kernel/dma-dummy.c
   3  *
   4  * Copyright (C) 1998 Philip Blundell
   5  * Copyright (c) 1998 Russell King
   6  *
   7  * Dummy DMA functions
   8  */
   9 #include <linux/errno.h>
  10 #include <linux/init.h>
  11 #include <linux/spinlock.h>
  12
  13 spinlock_t dma_spin_lock = SPIN_LOCK_UNLOCKED;
  14
  15 int request_dma(int channel, const char *device_id)
  16 {
  17         return -EINVAL;
  18 }
  19
  20 void free_dma(int channel)
  21 {
  22 }
  23
  24 int get_dma_list(char *buf)
  25 {
  26         return 0;
  27 }
  28
  29 void __init init_dma(void)
  30 {
  31 }