ARM: mx35: use generic function for displaying silicon revision
update to use generic function for displaying silicon revision
Signed-off-by: Jason Liu <jason.hui@linaro.org>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-imx/cpu-imx35.c b/arch/arm/mach-imx/cpu-imx35.c
index 6637cd8..846e46e 100644
--- a/arch/arm/mach-imx/cpu-imx35.c
+++ b/arch/arm/mach-imx/cpu-imx35.c
@@ -13,32 +13,30 @@
#include <mach/hardware.h>
#include <mach/iim.h>
-unsigned int mx35_cpu_rev;
-EXPORT_SYMBOL(mx35_cpu_rev);
+static int mx35_cpu_rev = -1;
-void __init mx35_read_cpu_rev(void)
+static int mx35_read_cpu_rev(void)
{
u32 rev;
- char *srev;
rev = __raw_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV));
switch (rev) {
case 0x00:
- mx35_cpu_rev = IMX_CHIP_REVISION_1_0;
- srev = "1.0";
- break;
+ return IMX_CHIP_REVISION_1_0;
case 0x10:
- mx35_cpu_rev = IMX_CHIP_REVISION_2_0;
- srev = "2.0";
- break;
+ return IMX_CHIP_REVISION_2_0;
case 0x11:
- mx35_cpu_rev = IMX_CHIP_REVISION_2_1;
- srev = "2.1";
- break;
+ return IMX_CHIP_REVISION_2_1;
default:
- mx35_cpu_rev = IMX_CHIP_REVISION_UNKNOWN;
- srev = "unknown";
+ return IMX_CHIP_REVISION_UNKNOWN;
}
-
- printk(KERN_INFO "CPU identified as i.MX35, silicon rev %s\n", srev);
}
+
+int mx35_revision(void)
+{
+ if (mx35_cpu_rev == -1)
+ mx35_cpu_rev = mx35_read_cpu_rev();
+
+ return mx35_cpu_rev;
+}
+EXPORT_SYMBOL(mx35_revision);