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Diffstat (limited to 'arch/arm/mach-imx/cpu-imx25.c')
-rw-r--r--arch/arm/mach-imx/cpu-imx25.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/cpu-imx25.c b/arch/arm/mach-imx/cpu-imx25.c
index 96ec64b5ff7d..d0ad67e802d3 100644
--- a/arch/arm/mach-imx/cpu-imx25.c
+++ b/arch/arm/mach-imx/cpu-imx25.c
@@ -11,6 +11,8 @@
*/
#include <linux/module.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include "iim.h"
#include "hardware.h"
@@ -20,8 +22,15 @@ static int mx25_cpu_rev = -1;
static int mx25_read_cpu_rev(void)
{
u32 rev;
+ void __iomem *iim_base;
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx25-iim");
+ iim_base = of_iomap(np, 0);
+ BUG_ON(!iim_base);
+ rev = readl(iim_base + MXC_IIMSREV);
+ iounmap(iim_base);
- rev = __raw_readl(MX25_IO_ADDRESS(MX25_IIM_BASE_ADDR + MXC_IIMSREV));
switch (rev) {
case 0x00:
return IMX_CHIP_REVISION_1_0;