linux-kernel - [PATCH 4/4] ARM: at91/dma: DMA controller registering with DT support

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Date:	Mon, 10 Oct 2011 18:37:52 +0200
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	vinod.koul@...el.com, linux-arm-kernel@...ts.infradead.org,
	robherring2@...il.com, devicetree-discuss@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org, grant.likely@...retlab.ca,
	Nicolas Ferre <nicolas.ferre@...el.com>
Subject: [PATCH 4/4] ARM: at91/dma: DMA controller registering with DT support

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

Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
 arch/arm/mach-at91/at91sam9g45_devices.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index c9b897f..cee7287 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -64,7 +64,14 @@ static struct platform_device at_hdmac_device = {
 
 void __init at91_add_device_hdmac(void)
 {
-	platform_device_register(&at_hdmac_device);
+	struct device_node *of_node =
+		of_find_node_by_name(NULL, "dma-controller");
+
+	if (of_node) {
+		of_node_put(of_node);
+	} else {
+		platform_device_register(&at_hdmac_device);
+	}
 }
 #else
 void __init at91_add_device_hdmac(void) {}
-- 
1.7.5.4

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