1 files changed, 27 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/mc146818rtc.h b/arch/m68k/include/asm/mc146818rtc.h
new file mode 100644
index 000000000..6e9f319ce
--- /dev/null
+++ b/arch/m68k/include/asm/mc146818rtc.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Machine dependent access functions for RTC registers.
+ */
+#ifndef _ASM_MC146818RTC_H
+#define _ASM_MC146818RTC_H
+
+
+#ifdef CONFIG_ATARI
+/* RTC in Atari machines */
+
+#include <asm/atarihw.h>
+
+#define ATARI_RTC_PORT(x)	(TT_RTC_BAS + 2*(x))
+#define RTC_ALWAYS_BCD	0
+
+#define CMOS_READ(addr) ({ \
+atari_outb_p((addr), ATARI_RTC_PORT(0)); \
+atari_inb_p(ATARI_RTC_PORT(1)); \
+})
+#define CMOS_WRITE(val, addr) ({ \
+atari_outb_p((addr), ATARI_RTC_PORT(0)); \
+atari_outb_p((val), ATARI_RTC_PORT(1)); \
+})
+#endif /* CONFIG_ATARI */
+
+#endif /* _ASM_MC146818RTC_H */