diff options
author | Arnd Bergmann <arnd@arndb.de> | 2009-06-17 02:31:12 +0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-17 06:47:27 +0400 |
commit | 08604bd9935dc98fb62ef61d5b7baa7ccc10f8c2 (patch) | |
tree | 2d0d451d78024bfbb4961a9ba94902abdc5f17e4 | |
parent | 03347e2592078a90df818670fddf97a33eec70fb (diff) | |
download | linux-08604bd9935dc98fb62ef61d5b7baa7ccc10f8c2.tar.xz |
time: move PIT_TICK_RATE to linux/timex.h
PIT_TICK_RATE is currently defined in four architectures, but in three
different places. While linux/timex.h is not the perfect place for it, it
is still a reasonable replacement for those drivers that traditionally use
asm/timex.h to get CLOCK_TICK_RATE and expect it to be the PIT frequency.
Note that for Alpha, the actual value changed from 1193182UL to 1193180UL.
This is unlikely to make a difference, and probably can only improve
accuracy. There was a discussion on the correct value of CLOCK_TICK_RATE
a few years ago, after which every existing instance was getting changed
to 1193182. According to the specification, it should be
1193181.818181...
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Len Brown <lenb@kernel.org>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | arch/alpha/include/asm/8253pit.h | 7 | ||||
-rw-r--r-- | arch/alpha/kernel/sys_ruffian.c | 1 | ||||
-rw-r--r-- | arch/mips/include/asm/i8253.h | 2 | ||||
-rw-r--r-- | arch/powerpc/include/asm/8253pit.h | 7 | ||||
-rw-r--r-- | arch/x86/include/asm/timex.h | 4 | ||||
-rw-r--r-- | arch/x86/kernel/i8253.c | 1 | ||||
-rw-r--r-- | arch/x86/kernel/tsc.c | 1 | ||||
-rw-r--r-- | drivers/clocksource/acpi_pm.c | 1 | ||||
-rw-r--r-- | drivers/input/joystick/analog.c | 2 | ||||
-rw-r--r-- | drivers/input/misc/pcspkr.c | 1 | ||||
-rw-r--r-- | include/linux/timex.h | 3 | ||||
-rw-r--r-- | sound/drivers/pcsp/pcsp.h | 1 | ||||
-rw-r--r-- | sound/oss/pas2_pcm.c | 2 |
13 files changed, 12 insertions, 21 deletions
diff --git a/arch/alpha/include/asm/8253pit.h b/arch/alpha/include/asm/8253pit.h index fef5c1450e47..a71c9c1455a7 100644 --- a/arch/alpha/include/asm/8253pit.h +++ b/arch/alpha/include/asm/8253pit.h @@ -1,10 +1,3 @@ /* * 8253/8254 Programmable Interval Timer */ - -#ifndef _8253PIT_H -#define _8253PIT_H - -#define PIT_TICK_RATE 1193180UL - -#endif diff --git a/arch/alpha/kernel/sys_ruffian.c b/arch/alpha/kernel/sys_ruffian.c index f15a329b6011..d9f9cfeb9931 100644 --- a/arch/alpha/kernel/sys_ruffian.c +++ b/arch/alpha/kernel/sys_ruffian.c @@ -14,6 +14,7 @@ #include <linux/sched.h> #include <linux/pci.h> #include <linux/ioport.h> +#include <linux/timex.h> #include <linux/init.h> #include <asm/ptrace.h> diff --git a/arch/mips/include/asm/i8253.h b/arch/mips/include/asm/i8253.h index 5dabc870b322..032ca73f181b 100644 --- a/arch/mips/include/asm/i8253.h +++ b/arch/mips/include/asm/i8253.h @@ -12,8 +12,6 @@ #define PIT_CH0 0x40 #define PIT_CH2 0x42 -#define PIT_TICK_RATE 1193182UL - extern spinlock_t i8253_lock; extern void setup_pit_timer(void); diff --git a/arch/powerpc/include/asm/8253pit.h b/arch/powerpc/include/asm/8253pit.h index b70d6e53b303..a71c9c1455a7 100644 --- a/arch/powerpc/include/asm/8253pit.h +++ b/arch/powerpc/include/asm/8253pit.h @@ -1,10 +1,3 @@ -#ifndef _ASM_POWERPC_8253PIT_H -#define _ASM_POWERPC_8253PIT_H - /* * 8253/8254 Programmable Interval Timer */ - -#define PIT_TICK_RATE 1193182UL - -#endif /* _ASM_POWERPC_8253PIT_H */ diff --git a/arch/x86/include/asm/timex.h b/arch/x86/include/asm/timex.h index b5c9d45c981f..1375cfc93960 100644 --- a/arch/x86/include/asm/timex.h +++ b/arch/x86/include/asm/timex.h @@ -4,9 +4,7 @@ #include <asm/processor.h> #include <asm/tsc.h> -/* The PIT ticks at this frequency (in HZ): */ -#define PIT_TICK_RATE 1193182 - +/* Assume we use the PIT time source for the clock tick */ #define CLOCK_TICK_RATE PIT_TICK_RATE #define ARCH_HAS_READ_CURRENT_TIMER diff --git a/arch/x86/kernel/i8253.c b/arch/x86/kernel/i8253.c index c2e0bb0890d4..5cf36c053ac4 100644 --- a/arch/x86/kernel/i8253.c +++ b/arch/x86/kernel/i8253.c @@ -7,6 +7,7 @@ #include <linux/spinlock.h> #include <linux/jiffies.h> #include <linux/module.h> +#include <linux/timex.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/io.h> diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 3e1c057e98fe..ae3180c506a6 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -9,6 +9,7 @@ #include <linux/delay.h> #include <linux/clocksource.h> #include <linux/percpu.h> +#include <linux/timex.h> #include <asm/hpet.h> #include <asm/timer.h> diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c index 40bd8c61c7d7..72a633a6ec98 100644 --- a/drivers/clocksource/acpi_pm.c +++ b/drivers/clocksource/acpi_pm.c @@ -18,6 +18,7 @@ #include <linux/acpi_pmtmr.h> #include <linux/clocksource.h> +#include <linux/timex.h> #include <linux/errno.h> #include <linux/init.h> #include <linux/pci.h> diff --git a/drivers/input/joystick/analog.c b/drivers/input/joystick/analog.c index 356b3a25efa2..1c0b529c06aa 100644 --- a/drivers/input/joystick/analog.c +++ b/drivers/input/joystick/analog.c @@ -35,7 +35,7 @@ #include <linux/input.h> #include <linux/gameport.h> #include <linux/jiffies.h> -#include <asm/timex.h> +#include <linux/timex.h> #define DRIVER_DESC "Analog joystick and gamepad driver" diff --git a/drivers/input/misc/pcspkr.c b/drivers/input/misc/pcspkr.c index d6a30cee7bc7..6d67af5387ad 100644 --- a/drivers/input/misc/pcspkr.c +++ b/drivers/input/misc/pcspkr.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/input.h> #include <linux/platform_device.h> +#include <linux/timex.h> #include <asm/io.h> MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); diff --git a/include/linux/timex.h b/include/linux/timex.h index 9910e3bd5b31..e6967d10d9e5 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -280,6 +280,9 @@ extern int do_adjtimex(struct timex *); int read_current_timer(unsigned long *timer_val); +/* The clock frequency of the i8253/i8254 PIT */ +#define PIT_TICK_RATE 1193182ul + #endif /* KERNEL */ #endif /* LINUX_TIMEX_H */ diff --git a/sound/drivers/pcsp/pcsp.h b/sound/drivers/pcsp/pcsp.h index cdef2664218f..174dd2ff0f22 100644 --- a/sound/drivers/pcsp/pcsp.h +++ b/sound/drivers/pcsp/pcsp.h @@ -10,6 +10,7 @@ #define __PCSP_H__ #include <linux/hrtimer.h> +#include <linux/timex.h> #if defined(CONFIG_MIPS) || defined(CONFIG_X86) /* Use the global PIT lock ! */ #include <asm/i8253.h> diff --git a/sound/oss/pas2_pcm.c b/sound/oss/pas2_pcm.c index 36c3ea62086b..8f7d175767a2 100644 --- a/sound/oss/pas2_pcm.c +++ b/sound/oss/pas2_pcm.c @@ -17,7 +17,7 @@ #include <linux/init.h> #include <linux/spinlock.h> -#include <asm/timex.h> +#include <linux/timex.h> #include "sound_config.h" #include "pas2.h" |