32 lines
720 B
C
32 lines
720 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Machine dependent access functions for RTC registers.
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*/
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#ifndef _ASM_MC146818RTC_H
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#define _ASM_MC146818RTC_H
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#include <linux/io.h>
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#include <linux/kernel.h>
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#define RTC_IRQ BUILD_BUG_ON(1)
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#ifndef RTC_PORT
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#define RTC_PORT(x) (0x70 + (x))
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#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */
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#endif
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/*
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* The yet supported machines all access the RTC index register via
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* an ISA port access but the way to access the date register differs ...
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*/
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#define CMOS_READ(addr) ({ \
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outb_p((addr),RTC_PORT(0)); \
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inb_p(RTC_PORT(1)); \
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})
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#define CMOS_WRITE(val, addr) ({ \
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outb_p((addr),RTC_PORT(0)); \
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outb_p((val),RTC_PORT(1)); \
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})
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#endif /* _ASM_MC146818RTC_H */
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