[PATCH] mips: calculate clock at any time

This patch changes bcu.c to calculate clock at any time.  Because clock can
be changed.  Moreover, EXPORT_SYMBOL_GPLs are added to it.
Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/mips/vr41xx/common/bcu.c

@@ -3,7 +3,7 @@
  *
  *  Copyright (C) 2002  MontaVista Software Inc.
  *    Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com>
- *  Copyright (C) 2003-2004  Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
+ *  Copyright (C) 2003-2005  Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -28,20 +28,16 @@
  *  Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
  *  - Added support for NEC VR4133.
  */
-#include <linux/init.h>
-#include <linux/ioport.h>
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/smp.h>
 #include <linux/types.h>
 
 #include <asm/cpu.h>
 #include <asm/io.h>
 
-#define IO_MEM_RESOURCE_START	0UL
-#define IO_MEM_RESOURCE_END	0x1fffffffUL
-
-#define CLKSPEEDREG_TYPE1	KSEG1ADDR(0x0b000014)
-#define CLKSPEEDREG_TYPE2	KSEG1ADDR(0x0f000014)
+#define CLKSPEEDREG_TYPE1	(void __iomem *)KSEG1ADDR(0x0b000014)
+#define CLKSPEEDREG_TYPE2	(void __iomem *)KSEG1ADDR(0x0f000014)
  #define CLKSP(x)		((x) & 0x001f)
  #define CLKSP_VR4133(x)	((x) & 0x0007)
 
@@ -63,11 +59,15 @@ unsigned long vr41xx_get_vtclock_frequency(void)
 	return vr41xx_vtclock;
 }
 
+EXPORT_SYMBOL_GPL(vr41xx_get_vtclock_frequency);
+
 unsigned long vr41xx_get_tclock_frequency(void)
 {
 	return vr41xx_tclock;
 }
 
+EXPORT_SYMBOL_GPL(vr41xx_get_tclock_frequency);
+
 static inline uint16_t read_clkspeed(void)
 {
 	switch (current_cpu_data.cputype) {
@@ -207,7 +207,7 @@ static inline unsigned long calculate_tclock(uint16_t clkspeed, unsigned long pc
 	return tclock;
 }
 
-static int __init vr41xx_bcu_init(void)
+void vr41xx_calculate_clock_frequency(void)
 {
 	unsigned long pclock;
 	uint16_t clkspeed;
@@ -217,11 +217,6 @@ static int __init vr41xx_bcu_init(void)
 	pclock = calculate_pclock(clkspeed);
 	vr41xx_vtclock = calculate_vtclock(clkspeed, pclock);
 	vr41xx_tclock = calculate_tclock(clkspeed, pclock, vr41xx_vtclock);
-
-	iomem_resource.start = IO_MEM_RESOURCE_START;
-	iomem_resource.end = IO_MEM_RESOURCE_END;
-
-	return 0;
 }
 
-early_initcall(vr41xx_bcu_init);
+EXPORT_SYMBOL_GPL(vr41xx_calculate_clock_frequency);

arch/mips/vr41xx/common/init.c

 /*
  *  init.c, Common initialization routines for NEC VR4100 series.
  *
- *  Copyright (C) 2003-2004  Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
+ *  Copyright (C) 2003-2005  Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -18,9 +18,20 @@
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 #include <linux/init.h>
+#include <linux/ioport.h>
 #include <linux/string.h>
 
 #include <asm/bootinfo.h>
+#include <asm/vr41xx/vr41xx.h>
+
+#define IO_MEM_RESOURCE_START	0UL
+#define IO_MEM_RESOURCE_END	0x1fffffffUL
+
+static void __init iomem_resource_init(void)
+{
+	iomem_resource.start = IO_MEM_RESOURCE_START;
+	iomem_resource.end = IO_MEM_RESOURCE_END;
+}
 
 void __init prom_init(void)
 {
@@ -35,6 +46,10 @@ void __init prom_init(void)
 		if (i < (argc - 1))
 			strcat(arcs_cmdline, " ");
 	}
+
+	vr41xx_calculate_clock_frequency();
+
+	iomem_resource_init();
 }
 
 unsigned long __init prom_free_prom_memory (void)

arch/mips/vr41xx/common/ksyms.c

@@ -22,9 +22,6 @@
 
 #include <asm/vr41xx/vr41xx.h>
 
-EXPORT_SYMBOL(vr41xx_get_vtclock_frequency);
-EXPORT_SYMBOL(vr41xx_get_tclock_frequency);
-
 EXPORT_SYMBOL(vr41xx_set_rtclong1_cycle);
 EXPORT_SYMBOL(vr41xx_read_rtclong1_counter);
 EXPORT_SYMBOL(vr41xx_set_rtclong2_cycle);

include/asm-mips/vr41xx/vr41xx.h

@@ -45,6 +45,7 @@
 /*
  * Bus Control Uint
  */
+extern unsigned long vr41xx_calculate_clock_frequency(void);
 extern unsigned long vr41xx_get_vtclock_frequency(void);
 extern unsigned long vr41xx_get_tclock_frequency(void);