ARM: mxs: add dma device

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/arm/mach-mxs/devices/platform-dma.c b/arch/arm/mach-mxs/devices/platform-dma.c
new file mode 100644
index 000000000000..295c4424d5d9
--- /dev/null
+++ b/arch/arm/mach-mxs/devices/platform-dma.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+#include <linux/compiler.h>
+#include <linux/err.h>
+#include <linux/init.h>
+
+#include <mach/mx23.h>
+#include <mach/mx28.h>
+#include <mach/devices-common.h>
+
+static struct platform_device *__init mxs_add_dma(const char *devid,
+                                                resource_size_t base)
+{
+        struct resource res[] = {
+                {
+                        .start = base,
+                        .end = base + SZ_8K - 1,
+                        .flags = IORESOURCE_MEM,
+                }
+        };
+
+        return mxs_add_platform_device_dmamask(devid, -1,
+                                res, ARRAY_SIZE(res), NULL, 0,
+                                DMA_BIT_MASK(32));
+}
+
+static int __init mxs_add_mxs_dma(void)
+{
+        char *apbh = "mxs-dma-apbh";
+        char *apbx = "mxs-dma-apbx";
+
+        if (cpu_is_mx23()) {
+                mxs_add_dma(apbh, MX23_APBH_DMA_BASE_ADDR);
+                mxs_add_dma(apbx, MX23_APBX_DMA_BASE_ADDR);
+        }
+
+        if (cpu_is_mx28()) {
+                mxs_add_dma(apbh, MX28_APBH_DMA_BASE_ADDR);
+                mxs_add_dma(apbx, MX28_APBX_DMA_BASE_ADDR);
+        }
+
+        return 0;
+}
+arch_initcall(mxs_add_mxs_dma);