[PATCH V2 4/4] ARM: at91/dma: DMA controller registering with DT support

[Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>]

Device tree support on at91sam9g45 family SoC. Only call
platform_device_register() if no compatible dma-controller
node is found in device tree.

Signed-off-by: Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
---
V2: use compatible string to match device.

 arch/arm/mach-at91/at91sam9g45_devices.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index 9390ae6..2120055 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -64,7 +64,13 @@ static struct platform_device at_hdmac_device = {
 
 void __init at91_add_device_hdmac(void)
 {
-	platform_device_register(&at_hdmac_device);
+	struct device_node *np = of_find_node_by_name(NULL, "dma-controller");
+
+	if (np && of_device_is_compatible(np, "atmel,at91sam9g45-dma")) {
+		of_node_put(np);
+	} else {
+		platform_device_register(&at_hdmac_device);
+	}
 }
 #else
 void __init at91_add_device_hdmac(void) {}
-- 
1.7.5.4