diff options
Diffstat (limited to 'kernel/arch/arm/include/asm/mc146818rtc.h')
| -rw-r--r-- | kernel/arch/arm/include/asm/mc146818rtc.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/arch/arm/include/asm/mc146818rtc.h b/kernel/arch/arm/include/asm/mc146818rtc.h new file mode 100644 index 000000000..e8567bb99 --- /dev/null +++ b/kernel/arch/arm/include/asm/mc146818rtc.h @@ -0,0 +1,30 @@ +/* + * Machine dependent access functions for RTC registers. + */ +#ifndef _ASM_MC146818RTC_H +#define _ASM_MC146818RTC_H + +#include <linux/io.h> +#include <linux/kernel.h> + +#define RTC_IRQ BUILD_BUG_ON(1) + +#ifndef RTC_PORT +#define RTC_PORT(x) (0x70 + (x)) +#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */ +#endif + +/* + * The yet supported machines all access the RTC index register via + * an ISA port access but the way to access the date register differs ... + */ +#define CMOS_READ(addr) ({ \ +outb_p((addr),RTC_PORT(0)); \ +inb_p(RTC_PORT(1)); \ +}) +#define CMOS_WRITE(val, addr) ({ \ +outb_p((addr),RTC_PORT(0)); \ +outb_p((val),RTC_PORT(1)); \ +}) + +#endif /* _ASM_MC146818RTC_H */ |