arch/arm/mach-mxs/devices/platform-dma.c

   1 /*
   2  * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it under
   5  * the terms of the GNU General Public License version 2 as published by the
   6  * Free Software Foundation.
   7  */
   8 #include <linux/compiler.h>
   9 #include <linux/err.h>
  10 #include <linux/init.h>
  11
  12 #include <mach/mx23.h>
  13 #include <mach/mx28.h>
  14 #include <mach/devices-common.h>
  15
  16 static struct platform_device *__init mxs_add_dma(const char *devid,
  17                                                 resource_size_t base)
  18 {
  19         struct resource res[] = {
  20                 {
  21                         .start = base,
  22                         .end = base + SZ_8K - 1,
  23                         .flags = IORESOURCE_MEM,
  24                 }
  25         };
  26
  27         return mxs_add_platform_device_dmamask(devid, -1,
  28                                 res, ARRAY_SIZE(res), NULL, 0,
  29                                 DMA_BIT_MASK(32));
  30 }
  31
  32 static int __init mxs_add_mxs_dma(void)
  33 {
  34         char *apbh = "mxs-dma-apbh";
  35         char *apbx = "mxs-dma-apbx";
  36
  37         if (cpu_is_mx23()) {
  38                 mxs_add_dma(apbh, MX23_APBH_DMA_BASE_ADDR);
  39                 mxs_add_dma(apbx, MX23_APBX_DMA_BASE_ADDR);
  40         }
  41
  42         if (cpu_is_mx28()) {
  43                 mxs_add_dma(apbh, MX28_APBH_DMA_BASE_ADDR);
  44                 mxs_add_dma(apbx, MX28_APBX_DMA_BASE_ADDR);
  45         }
  46
  47         return 0;
  48 }
  49 arch_initcall(mxs_add_mxs_dma);