i386: prepare sharing the PIT code

PIT clock events work already and the PIT handling is the same for
i386 and x86_64. x86_64 does not support PIT as a clock source, so
disable the PIT clocksource for x86_64.

Use the i386 i8253.h include file for x86_64 as well to share the
exports and the PIT constants.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>

4 files changed, 22 insertions, 33 deletions

diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c
index e97a3ee13551..d899216e01ca 100644
--- a/arch/x86/kernel/time_64.c
+++ b/arch/x86/kernel/time_64.c
@@ -32,7 +32,6 @@
 #include <acpi/achware.h>       /* for PM timer frequency */
 #include <acpi/acpi_bus.h>
 #endif
-#include <asm/8253pit.h>
 #include <asm/i8253.h>
 #include <asm/pgtable.h>
 #include <asm/vsyscall.h>
@@ -292,9 +291,6 @@ static unsigned int __init tsc_calibrate_cpu_khz(void)
         return pmc_now * tsc_khz / (tsc_now - tsc_start);
 }
 
-#define PIT_MODE 0x43
-#define PIT_CH0  0x40
-
 static void __pit_init(int val, u8 mode)
 {
         unsigned long flags;
diff --git a/include/asm-x86/i8253.h b/include/asm-x86/i8253.h
index b2a4f995a33f..7eff6fd27474 100644
--- a/include/asm-x86/i8253.h
+++ b/include/asm-x86/i8253.h
@@ -1,5 +1,23 @@
-#ifdef CONFIG_X86_32
-# include "i8253_32.h"
-#else
-# include "i8253_64.h"
+#ifndef __ASM_I8253_H__
+#define __ASM_I8253_H__
+
+#ifdef CONFIG_X86_64
+# include <asm/8253pit.h>
 #endif
+
+/* i8253A PIT registers */
+#define PIT_MODE                0x43
+#define PIT_CH0                 0x40
+#define PIT_CH2                 0x42
+
+extern spinlock_t i8253_lock;
+
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+
+extern struct clock_event_device *global_clock_event;
+
+extern void setup_pit_timer(void);
+
+#endif
+
+#endif  /* __ASM_I8253_H__ */
diff --git a/include/asm-x86/i8253_32.h b/include/asm-x86/i8253_32.h
deleted file mode 100644
index 28cf67da59a3..000000000000
--- a/include/asm-x86/i8253_32.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#ifndef __ASM_I8253_H__
-#define __ASM_I8253_H__
-
-/* i8253A PIT registers */
-#define PIT_MODE                0x43
-#define PIT_CH0                 0x40
-#define PIT_CH2                 0x42
-
-extern spinlock_t i8253_lock;
-
-#ifdef CONFIG_GENERIC_CLOCKEVENTS
-
-extern struct clock_event_device *global_clock_event;
-
-extern void setup_pit_timer(void);
-
-#endif
-
-#endif  /* __ASM_I8253_H__ */
diff --git a/include/asm-x86/i8253_64.h b/include/asm-x86/i8253_64.h
deleted file mode 100644
index 015d8df07690..000000000000
--- a/include/asm-x86/i8253_64.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __ASM_I8253_H__
-#define __ASM_I8253_H__
-
-extern spinlock_t i8253_lock;
-
-#endif  /* __ASM_I8253_H__ */