summaryrefslogtreecommitdiffstats
path: root/arch/m32r/include/asm/rtc.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m32r/include/asm/rtc.h')
-rw-r--r--arch/m32r/include/asm/rtc.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/m32r/include/asm/rtc.h b/arch/m32r/include/asm/rtc.h
new file mode 100644
index 00000000000..0340633f3f4
--- /dev/null
+++ b/arch/m32r/include/asm/rtc.h
@@ -0,0 +1,65 @@
+#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__ */