[PATCH 03/13] ARM: imx27: Retrieve the SYSCTRL base address from devicetree

[Fabio Estevam]

Now that imx27 has been converted to a devicetree-only platform,
retrieve the SYSCTRL base address from devicetree.

Signed-off-by: Fabio Estevam <festevam at gmail.com>
---
 arch/arm/mach-imx/cpu-imx27.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/cpu-imx27.c b/arch/arm/mach-imx/cpu-imx27.c
index a969aa71b60f..2c8430f34556 100644
--- a/arch/arm/mach-imx/cpu-imx27.c
+++ b/arch/arm/mach-imx/cpu-imx27.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/io.h>
+#include <linux/of_address.h>
 #include <linux/module.h>
 
 #include "hardware.h"
@@ -20,13 +21,19 @@ static int mx27_cpu_partnumber;
 
 static int mx27_read_cpu_rev(void)
 {
+	void __iomem *sysctrl_base;
+	struct device_node *np;
 	u32 val;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,imx27-sysctrl");
+	sysctrl_base = of_iomap(np, 0);
+	BUG_ON(!sysctrl_base);
 	/*
 	 * now we have access to the IO registers. As we need
 	 * the silicon revision very early we read it here to
 	 * avoid any further hooks
 	*/
-	val = imx_readl(MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR + SYS_CHIP_ID));
+	val = imx_readl(sysctrl_base + SYS_CHIP_ID);
 
 	mx27_cpu_partnumber = (int)((val >> 12) & 0xFFFF);
 
-- 
2.17.1