diff options
author | Paul Mackerras <paulus@samba.org> | 2007-12-21 22:21:08 +1100 |
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committer | Paul Mackerras <paulus@samba.org> | 2007-12-21 22:21:08 +1100 |
commit | c2a7dcad9f0d92d7a96e735abb8bec7b9c621536 (patch) | |
tree | bf9b20fdd5ab07e5b0e4e0b95c6a3dbab1005cb9 /arch/mips/cobalt/time.c | |
parent | 373a6da165ac3012a74fd072da340eabca55d031 (diff) | |
parent | ea67db4cdbbf7f4e74150e71da0984e25121f500 (diff) |
Merge branch 'linux-2.6'
Diffstat (limited to 'arch/mips/cobalt/time.c')
-rw-r--r-- | arch/mips/cobalt/time.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/arch/mips/cobalt/time.c b/arch/mips/cobalt/time.c index fa819fccd5db..4a570e7145fe 100644 --- a/arch/mips/cobalt/time.c +++ b/arch/mips/cobalt/time.c @@ -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); } |