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- #ifndef __RTC_H__
- #define __RTC_H__
- /* Dallas DS1302 clock/calendar register numbers. */
- # define RTC_SECONDS 0
- # define RTC_MINUTES 1
- # define RTC_HOURS 2
- # define RTC_DAY_OF_MONTH 3
- # define RTC_MONTH 4
- # define RTC_WEEKDAY 5
- # define RTC_YEAR 6
- # define RTC_CONTROL 7
- /* Bits in CONTROL register. */
- # define RTC_CONTROL_WRITEPROTECT 0x80
- # define RTC_TRICKLECHARGER 8
- /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
- # define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */
- # define RTC_TCR_1DIOD 0x04 /* xxxx01xx */
- # define RTC_TCR_2DIOD 0x08 /* xxxx10xx */
- # define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */
- # define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2KOhm */
- # define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */
- # define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */
- #ifdef CONFIG_DS1302
- extern unsigned char ds1302_readreg(int reg);
- extern void ds1302_writereg(int reg, unsigned char val);
- extern int ds1302_init(void);
- # define CMOS_READ(x) ds1302_readreg(x)
- # define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
- # define RTC_INIT() ds1302_init()
- #else
- /* No RTC configured so we shouldn't try to access any. */
- # define CMOS_READ(x) 42
- # define CMOS_WRITE(x,y)
- # define RTC_INIT() (-1)
- #endif
- /*
- * The struct used to pass data via the following ioctl. Similar to the
- * struct tm in <time.h>, but it needs to be here so that the kernel
- * source is self contained, allowing cross-compiles, etc. etc.
- */
- struct rtc_time {
- int tm_sec;
- int tm_min;
- int tm_hour;
- int tm_mday;
- int tm_mon;
- int tm_year;
- int tm_wday;
- int tm_yday;
- int tm_isdst;
- };
- /* ioctl() calls that are permitted to the /dev/rtc interface. */
- #define RTC_MAGIC 'p'
- #define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */
- #define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */
- #define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int)
- #define RTC_MAX_IOCTL 0x0b
- #endif /* __RTC_H__ */
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