1/* 2 * Machine dependent access functions for RTC registers. 3 */ 4#ifndef _ASM_MC146818RTC_H 5#define _ASM_MC146818RTC_H 6 7#include <linux/io.h> 8#include <mach/irqs.h> 9 10#ifndef RTC_PORT 11#define RTC_PORT(x) (0x70 + (x)) 12#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */ 13#endif 14 15/* 16 * The yet supported machines all access the RTC index register via 17 * an ISA port access but the way to access the date register differs ... 18 */ 19#define CMOS_READ(addr) ({ \ 20outb_p((addr),RTC_PORT(0)); \ 21inb_p(RTC_PORT(1)); \ 22}) 23#define CMOS_WRITE(val, addr) ({ \ 24outb_p((addr),RTC_PORT(0)); \ 25outb_p((val),RTC_PORT(1)); \ 26}) 27 28#endif /* _ASM_MC146818RTC_H */ 29