ARM: imx: Introduce generic function for displaying silicon revision

Currently each i.MX processor has its own function for displaying the silicon
revision.

Introduce a generic function for this purpose, so that all i.MX processors can
reuse it.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Jason Liu <jason.hui@linaro.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 10 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/cpu.c b/arch/arm/plat-mxc/cpu.c
index 386e0d52cf5..f5b7e0fa237 100644
--- a/arch/arm/plat-mxc/cpu.c
+++ b/arch/arm/plat-mxc/cpu.c
@@ -1,5 +1,6 @@
 
 #include <linux/module.h>
+#include <mach/hardware.h>
 
 unsigned int __mxc_cpu_type;
 EXPORT_SYMBOL(__mxc_cpu_type);
@@ -9,3 +10,11 @@ void mxc_set_cpu_type(unsigned int type)
         __mxc_cpu_type = type;
 }
 
+void imx_print_silicon_rev(const char *cpu, int srev)
+{
+        if (srev == IMX_CHIP_REVISION_UNKNOWN)
+                pr_info("CPU identified as %s, unknown revision\n", cpu);
+        else
+                pr_info("CPU identified as %s, silicon rev %d.%d\n",
+                                cpu, (srev >> 4) & 0xf, srev & 0xf);
+}
diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h
index 4e3d97890d6..318e0da13a7 100644
--- a/arch/arm/plat-mxc/include/mach/common.h
+++ b/arch/arm/plat-mxc/include/mach/common.h
@@ -72,4 +72,5 @@ extern void mxc_arch_reset_init(void __iomem *);
 extern void mx51_efikamx_reset(void);
 extern int mx53_revision(void);
 extern int mx53_display_revision(void);
+extern void imx_print_silicon_rev(const char *cpu, int srev);
 #endif