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: NGreg Ungerer <gerg@uclinux.org>

arch/m68k/include/asm/m5206sim.h

@@ -13,6 +13,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m5206)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 /*
  *	Define the 5206 SIM register set addresses.

arch/m68k/include/asm/m520xsim.h

@@ -12,6 +12,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m520x)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 /*
  *  Define the 520x SIM register set addresses.

arch/m68k/include/asm/m523xsim.h

@@ -12,6 +12,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m523x)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 /*
  *	Define the 523x SIM register set addresses.

arch/m68k/include/asm/m5249sim.h

@@ -12,6 +12,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m5249)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 /*
  *	Define the 5249 SIM register set addresses.

arch/m68k/include/asm/m5272sim.h

@@ -13,6 +13,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m5272)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 /*
  *	Define the 5272 SIM register set addresses.

arch/m68k/include/asm/m527xsim.h

@@ -12,6 +12,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m527x)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 
 /*

arch/m68k/include/asm/m528xsim.h

@@ -12,6 +12,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m528x)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 /*
  *	Define the 5280/5282 SIM register set addresses.

arch/m68k/include/asm/m5307sim.h

@@ -15,6 +15,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m5307)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 /*
  *	Define the 5307 SIM register set addresses.

arch/m68k/include/asm/m532xsim.h

@@ -10,6 +10,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m532x)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 #define MCF_REG32(x) (*(volatile unsigned long  *)(x))
 #define MCF_REG16(x) (*(volatile unsigned short *)(x))

arch/m68k/include/asm/m5407sim.h

@@ -15,6 +15,7 @@
 /****************************************************************************/
 
 #define	CPU_NAME		"COLDFIRE(m5407)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 /*
  *	Define the 5407 SIM register set addresses.

arch/m68k/include/asm/m54xxsim.h

@@ -6,6 +6,7 @@
 #define m54xxsim_h
 
 #define	CPU_NAME		"COLDFIRE(m54xx)"
+#define	CPU_INSTR_PER_JIFFY	2
 
 #define MCFINT_VECBASE		64
 

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"