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 <linux/kernel.h> 9 10#define RTC_IRQ BUILD_BUG_ON(1) 11 12#ifndef RTC_PORT 13#define RTC_PORT(x) (0x70 + (x)) 14#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */ 15#endif 16 17/* 18 * The yet supported machines all access the RTC index register via 19 * an ISA port access but the way to access the date register differs ... 20 */ 21#define CMOS_READ(addr) ({ \ 22outb_p((addr),RTC_PORT(0)); \ 23inb_p(RTC_PORT(1)); \ 24}) 25#define CMOS_WRITE(val, addr) ({ \ 26outb_p((addr),RTC_PORT(0)); \ 27outb_p((val),RTC_PORT(1)); \ 28}) 29 30#endif /* _ASM_MC146818RTC_H */ 31