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sh: First step at generic timeofday support. 

At the moment we wrap GENERIC_TIME around our existing timer API.
As boards start providing their own clocksources, they're able to
select GENERIC_TIME accordingly and optimize out most of the timer
API.

Once the current timers have been reworked as proper clocksource
drivers, the rest of the place holders for the timer API can go
away and we can flip on GENERIC_TIME unconditionally.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2006-10-04 13:21:45 +09:00 committed by Paul Mundt
parent 49f19ce401
commit 4588214526
3 changed files with 10 additions and 0 deletions
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4
arch/sh/Kconfig
View File

@ -45,6 +45,9 @@ config GENERIC_CALIBRATE_DELAY
config GENERIC_IOMAP
bool
config GENERIC_TIME
def_bool n
config ARCH_MAY_HAVE_PC_FDC
bool
@ -357,6 +360,7 @@ config CPU_HAS_SR_RB
endmenu
menu "Timer support"
depends on !GENERIC_TIME
config SH_TMU
bool "TMU timer support"

2
arch/sh/kernel/time.c
View File

@ -47,6 +47,7 @@ unsigned long long __attribute__ ((weak)) sched_clock(void)
return (unsigned long long)jiffies * (1000000000 / HZ);
}
#ifndef CONFIG_GENERIC_TIME
void do_gettimeofday(struct timeval *tv)
{
unsigned long seq;
@ -99,6 +100,7 @@ int do_settimeofday(struct timespec *tv)
return 0;
}
EXPORT_SYMBOL(do_settimeofday);
#endif /* !CONFIG_GENERIC_TIME */
/* last time the RTC clock got updated */
static long last_rtc_update;

4
include/asm-sh/timer.h
View File

@ -8,7 +8,9 @@ struct sys_timer_ops {
int (*init)(void);
int (*start)(void);
int (*stop)(void);
#ifndef CONFIG_GENERIC_TIME
unsigned long (*get_offset)(void);
#endif
unsigned long (*get_frequency)(void);
};
@ -24,10 +26,12 @@ struct sys_timer {
extern struct sys_timer tmu_timer;
extern struct sys_timer *sys_timer;
#ifndef CONFIG_GENERIC_TIME
static inline unsigned long get_timer_offset(void)
{
return sys_timer->ops->get_offset();
}
#endif
static inline unsigned long get_timer_frequency(void)
{