From d2a37b3d91f46da25e7ff34f582e914a4cc0bfee Mon Sep 17 00:00:00 2001
From: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Date: Mon, 9 Jul 2012 21:39:12 +0200
Subject: ARM i.MX31: Add devicetree support

This patch adds basic devicetree support for i.MX31 based SoCs.

Only the UART and interrupts bindings are added.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-imx/clk-imx31.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'arch/arm/mach-imx/clk-imx31.c')

diff --git a/arch/arm/mach-imx/clk-imx31.c b/arch/arm/mach-imx/clk-imx31.c
index c9a06d8..f87a48f 100644
--- a/arch/arm/mach-imx/clk-imx31.c
+++ b/arch/arm/mach-imx/clk-imx31.c
@@ -20,6 +20,7 @@
 #include <linux/clkdev.h>
 #include <linux/io.h>
 #include <linux/err.h>
+#include <linux/of.h>
 
 #include <mach/hardware.h>
 #include <mach/mx31.h>
@@ -179,3 +180,21 @@ int __init mx31_clocks_init(unsigned long fref)
 
 	return 0;
 }
+
+#ifdef CONFIG_OF
+int __init mx31_clocks_init_dt(void)
+{
+	struct device_node *np;
+	u32 fref = 26000000; /* default */
+
+	for_each_compatible_node(np, NULL, "fixed-clock") {
+		if (!of_device_is_compatible(np, "fsl,imx-osc26m"))
+			continue;
+
+		if (!of_property_read_u32(np, "clock-frequency", &fref))
+			break;
+	}
+
+	return mx31_clocks_init(fref);
+}
+#endif
-- 
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