m68knommu: fix clock rate value reported for ColdFire 54xx parts

The instruction timings of the ColdFire 54xx family parts are
different to other version 4 parts (or version 2 or 3 parts for
that matter too).

Move the instruction timing setting into the ColdFire part
specific headers, and set the 54xx value appropriately.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

1 files changed, 11 insertions, 9 deletions

diff --git a/arch/m68knommu/kernel/setup.c b/arch/m68knommu/kernel/setup.c
index f48d9df484d3..5c931f9d392c 100644
--- a/arch/m68knommu/kernel/setup.c
+++ b/arch/m68knommu/kernel/setup.c
@@ -66,13 +66,20 @@ void (*mach_power_off)(void);
 #ifdef CONFIG_M68360
 #define CPU_NAME        "MC68360"
 #endif
-/*
- * The ColdFire CPU names are defined in their headers.
- */
 #ifndef CPU_NAME
 #define CPU_NAME        "UNKNOWN"
 #endif
 
+/*
+ * Different cores have different instruction execution timings.
+ * The old/traditional 68000 cores are basically all the same, at 16.
+ * The ColdFire cores vary a little, their values are defined in their
+ * headers. We default to the standard 68000 value here.
+ */
+#ifndef CPU_INSTR_PER_JIFFY
+#define CPU_INSTR_PER_JIFFY     16
+#endif
+
 extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
 extern int _ramstart, _ramend;
 
@@ -273,12 +280,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         cpu = CPU_NAME;
         mmu = "none";
         fpu = "none";
-
-#ifdef CONFIG_COLDFIRE
-        clockfreq = (loops_per_jiffy * HZ) * 3;
-#else
-        clockfreq = (loops_per_jiffy * HZ) * 16;
-#endif
+        clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
 
         seq_printf(m, "CPU:\t\t%s\n"
                       "MMU:\t\t%s\n"