diff options
Diffstat (limited to 'arch/mips/kernel/csrc-ioasic.c')
| -rw-r--r-- | arch/mips/kernel/csrc-ioasic.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/arch/mips/kernel/csrc-ioasic.c b/arch/mips/kernel/csrc-ioasic.c index 46bd7fa98d6..6cbbf6e106b 100644 --- a/arch/mips/kernel/csrc-ioasic.c +++ b/arch/mips/kernel/csrc-ioasic.c @@ -1,7 +1,7 @@ /* * DEC I/O ASIC's counter clocksource * - * Copyright (C) 2008 Yoichi Yuasa <yuasa@linux-mips.org> + * Copyright (C) 2008 Yoichi Yuasa <yuasa@linux-mips.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -37,13 +37,13 @@ static struct clocksource clocksource_dec = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; -void __init dec_ioasic_clocksource_init(void) +int __init dec_ioasic_clocksource_init(void) { unsigned int freq; u32 start, end; - int i = HZ / 10; - + int i = HZ / 8; + ds1287_timer_state(); while (!ds1287_timer_state()) ; @@ -55,9 +55,15 @@ void __init dec_ioasic_clocksource_init(void) end = dec_ioasic_hpt_read(&clocksource_dec); - freq = (end - start) * 10; + freq = (end - start) * 8; + + /* An early revision of the I/O ASIC didn't have the counter. */ + if (!freq) + return -ENXIO; + printk(KERN_INFO "I/O ASIC clock frequency %dHz\n", freq); clocksource_dec.rating = 200 + freq / 10000000; clocksource_register_hz(&clocksource_dec, freq); + return 0; } |