diff options
Diffstat (limited to 'include/asm-powerpc/mc146818rtc.h')
| -rw-r--r-- | include/asm-powerpc/mc146818rtc.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/asm-powerpc/mc146818rtc.h b/include/asm-powerpc/mc146818rtc.h new file mode 100644 index 00000000000..a5619a2a139 --- /dev/null +++ b/include/asm-powerpc/mc146818rtc.h @@ -0,0 +1,36 @@ +#ifndef _POWERPC_MC146818RTC_H +#define _POWERPC_MC146818RTC_H + +/* + * Machine dependent access functions for RTC registers. + * + * 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 the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifdef __KERNEL__ + +#include <asm/io.h> + +#ifndef RTC_PORT +#define RTC_PORT(x) (0x70 + (x)) +#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */ +#endif + +/* + * The yet supported machines all access the RTC index register via + * an ISA port access but the way to access the date register differs ... + */ +#define CMOS_READ(addr) ({ \ +outb_p((addr),RTC_PORT(0)); \ +inb_p(RTC_PORT(1)); \ +}) +#define CMOS_WRITE(val, addr) ({ \ +outb_p((addr),RTC_PORT(0)); \ +outb_p((val),RTC_PORT(1)); \ +}) + +#endif /* __KERNEL__ */ +#endif /* _POWERPC_MC146818RTC_H */ |