diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2008-01-30 13:30:26 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:26 +0100 |
| commit | 6ce60b07e670e800c4c5cfe984ed5188e7a64135 (patch) | |
| tree | 108c493c98bc8afa42e246c9494d59543556c8c4 /arch/x86 | |
| parent | 4ec08da02f0fda16fbc8dfa040568facaa576790 (diff) | |
x86: unify mc146818rtc.h - prepare for sharing rtc code
Unify mc146818rtc.h by adding the rtc_cmos_read/write functions to
time_64.c. This is a preparatory patch to finaly share the rtc code,
which is unsurprisingly similar.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/time_64.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c index 368b1942b39..0a01504586a 100644 --- a/arch/x86/kernel/time_64.c +++ b/arch/x86/kernel/time_64.c @@ -69,6 +69,27 @@ unsigned long profile_pc(struct pt_regs *regs) } EXPORT_SYMBOL(profile_pc); +/* Routines for accessing the CMOS RAM/RTC. */ +unsigned char rtc_cmos_read(unsigned char addr) +{ + unsigned char val; + lock_cmos_prefix(addr); + outb_p(addr, RTC_PORT(0)); + val = inb_p(RTC_PORT(1)); + lock_cmos_suffix(addr); + return val; +} +EXPORT_SYMBOL(rtc_cmos_read); + +void rtc_cmos_write(unsigned char val, unsigned char addr) +{ + lock_cmos_prefix(addr); + outb_p(addr, RTC_PORT(0)); + outb_p(val, RTC_PORT(1)); + lock_cmos_suffix(addr); +} +EXPORT_SYMBOL(rtc_cmos_write); + /* * In order to set the CMOS clock precisely, set_rtc_mmss has to be called 500 * ms after the second nowtime has started, because when nowtime is written |