ARM: OMAP: Fix dmaengine init for multiplatform

Otherwise omap dmaengine will initialized when booted
on other SoCs. Fix this by initializing the platform
device in arch/arm/*omap*/dma.c instead.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Dan Williams <djbw@fb.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 19 insertions, 2 deletions

diff --git a/arch/arm/mach-omap2/dma.c b/arch/arm/mach-omap2/dma.c
index e034ab69a046..5cd8d7668bec 100644
--- a/arch/arm/mach-omap2/dma.c
+++ b/arch/arm/mach-omap2/dma.c
@@ -27,7 +27,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/device.h>
-
+#include <linux/dma-mapping.h>
 #include <linux/omap-dma.h>
 
 #include "soc.h"
@@ -288,9 +288,26 @@ static int __init omap2_system_dma_init_dev(struct omap_hwmod *oh, void *unused)
         return 0;
 }
 
+static const struct platform_device_info omap_dma_dev_info = {
+        .name = "omap-dma-engine",
+        .id = -1,
+        .dma_mask = DMA_BIT_MASK(32),
+};
+
 static int __init omap2_system_dma_init(void)
 {
-        return omap_hwmod_for_each_by_class("dma",
+        struct platform_device *pdev;
+        int res;
+
+        res = omap_hwmod_for_each_by_class("dma",
                         omap2_system_dma_init_dev, NULL);
+        if (res)
+                return res;
+
+        pdev = platform_device_register_full(&omap_dma_dev_info);
+        if (IS_ERR(pdev))
+                return PTR_ERR(pdev);
+
+        return res;
 }
 omap_arch_initcall(omap2_system_dma_init);