1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2#ifndef _ASM_POWERPC_MC146818RTC_H 3#define _ASM_POWERPC_MC146818RTC_H 4 5/* 6 * Machine dependent access functions for RTC registers. 7 */ 8 9#ifdef __KERNEL__ 10 11#include <asm/io.h> 12 13#ifndef RTC_PORT 14#define RTC_PORT(x) (0x70 + (x)) 15#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */ 16#endif 17 18/* 19 * The yet supported machines all access the RTC index register via 20 * an ISA port access but the way to access the date register differs ... 21 */ 22#define CMOS_READ(addr) ({ \ 23outb_p((addr),RTC_PORT(0)); \ 24inb_p(RTC_PORT(1)); \ 25}) 26#define CMOS_WRITE(val, addr) ({ \ 27outb_p((addr),RTC_PORT(0)); \ 28outb_p((val),RTC_PORT(1)); \ 29}) 30 31#endif /* __KERNEL__ */ 32#endif /* _ASM_POWERPC_MC146818RTC_H */ 33