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/dma-mapping.h>
  10 #include <linux/err.h>
  11 #include <linux/init.h>
  12
  13 #include <mach/mx23.h>
  14 #include <mach/mx28.h>
  15 #include <mach/devices-common.h>
  16
  17 static struct platform_device *__init mxs_add_dma(const char *devid,
  18                                                 resource_size_t base)
  19 {
  20         struct resource res[] = {
  21                 {
  22                         .start = base,
  23                         .end = base + SZ_8K - 1,
  24                         .flags = IORESOURCE_MEM,
  25                 }
  26         };
  27
  28         return mxs_add_platform_device_dmamask(devid, -1,
  29                                 res, ARRAY_SIZE(res), NULL, 0,
  30                                 DMA_BIT_MASK(32));
  31 }
  32
  33 static int __init mxs_add_mxs_dma(void)
  34 {
  35         char *apbh = "mxs-dma-apbh";
  36         char *apbx = "mxs-dma-apbx";
  37
  38         if (cpu_is_mx23()) {
  39                 mxs_add_dma(apbh, MX23_APBH_DMA_BASE_ADDR);
  40                 mxs_add_dma(apbx, MX23_APBX_DMA_BASE_ADDR);
  41         }
  42
  43         if (cpu_is_mx28()) {
  44                 mxs_add_dma(apbh, MX28_APBH_DMA_BASE_ADDR);
  45                 mxs_add_dma(apbx, MX28_APBX_DMA_BASE_ADDR);
  46         }
  47
  48         return 0;
  49 }
  50 arch_initcall(mxs_add_mxs_dma);