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[MIPS] time: Set up Cobalt's mips_hpt_frequency

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Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Yoichi Yuasa 2007-12-09 21:22:04 +09:00 committed by Ralf Baechle
parent da8cadb31b
commit 18ca38d26f
1 changed files with 20 additions and 1 deletions
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21
arch/mips/cobalt/time.c
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@ -27,9 +27,28 @@
void __init plat_time_init(void)
{
u32 start, end;
int i = HZ / 10;
setup_pit_timer();
gt641xx_set_base_clock(GT641XX_BASE_CLOCK);
mips_timer_state = gt641xx_timer0_state;
/*
* MIPS counter frequency is measured during a 100msec interval
* using GT64111 timer0.
*/
while (!gt641xx_timer0_state())
;
start = read_c0_count();
while (i--)
while (!gt641xx_timer0_state())
;
end = read_c0_count();
mips_hpt_frequency = (end - start) * 10;
printk(KERN_INFO "MIPS counter frequency %dHz\n", mips_hpt_frequency);
}