ARM: imx35: Retrieve the IIM base address from devicetree

Now that imx35 has been converted to a devicetree-only platform,
retrieve the IIM base address from devicetree.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/mach-imx/cpu-imx35.c b/arch/arm/mach-imx/cpu-imx35.c
index ebb3cda..80e7d8a 100644 (file)
--- a/arch/arm/mach-imx/cpu-imx35.c
+++ b/arch/arm/mach-imx/cpu-imx35.c
@@ -5,6 +5,7 @@
  * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
  */
 #include <linux/module.h>
+#include <linux/of_address.h>
 #include <linux/io.h>
 
 #include "hardware.h"
@@ -14,9 +15,15 @@ static int mx35_cpu_rev = -1;
 
 static int mx35_read_cpu_rev(void)
 {
+       void __iomem *iim_base;
+       struct device_node *np;
        u32 rev;
 
-       rev = imx_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV));
+       np = of_find_compatible_node(NULL, NULL, "fsl,imx35-iim");
+       iim_base = of_iomap(np, 0);
+       BUG_ON(!iim_base);
+
+       rev = imx_readl(iim_base + MXC_IIMSREV);
        switch (rev) {
        case 0x00:
                return IMX_CHIP_REVISION_1_0;