sh: rtc-generic support.

This adds rtc-generic support for SUPERH32.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -30,6 +30,7 @@ config SUPERH32
 	select HAVE_DYNAMIC_FTRACE
 	select HAVE_ARCH_KGDB
 	select ARCH_HIBERNATION_POSSIBLE if MMU
+	select RTC_LIB
 
 config SUPERH64
 	def_bool ARCH = "sh64"

arch/sh/include/asm/rtc.h

@@ -6,6 +6,17 @@ extern void (*board_time_init)(void);
 extern void (*rtc_sh_get_time)(struct timespec *);
 extern int (*rtc_sh_set_time)(const time_t);
 
+/* some dummy definitions */
+#define RTC_BATT_BAD 0x100	/* battery bad */
+#define RTC_SQWE 0x08		/* enable square-wave output */
+#define RTC_DM_BINARY 0x04	/* all time/date values are BCD if clear */
+#define RTC_24H 0x02		/* 24 hour mode - else hours bit 7 means pm */
+#define RTC_DST_EN 0x01	        /* auto switch DST - works f. USA only */
+
+struct rtc_time;
+unsigned int get_rtc_time(struct rtc_time *);
+int set_rtc_time(struct rtc_time *);
+
 #define RTC_CAP_4_DIGIT_YEAR	(1 << 0)
 
 struct sh_rtc_platform_info {

arch/sh/kernel/time_32.c

@@ -19,6 +19,7 @@
 #include <linux/mc146818rtc.h>	/* for rtc_lock */
 #include <linux/platform_device.h>
 #include <linux/smp.h>
+#include <linux/rtc.h>
 #include <asm/clock.h>
 #include <asm/rtc.h>
 #include <asm/timer.h>
@@ -45,6 +46,28 @@ static int null_rtc_set_time(const time_t secs)
 void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
 int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;
 
+unsigned int get_rtc_time(struct rtc_time *tm)
+{
+	if (rtc_sh_get_time != null_rtc_get_time) {
+		struct timespec tv;
+
+		rtc_sh_get_time(&tv);
+		rtc_time_to_tm(tv.tv_sec, tm);
+	}
+
+	return RTC_24H;
+}
+EXPORT_SYMBOL(get_rtc_time);
+
+int set_rtc_time(struct rtc_time *tm)
+{
+	unsigned long secs;
+
+	rtc_tm_to_time(tm, &secs);
+	return rtc_sh_set_time(secs);
+}
+EXPORT_SYMBOL(set_rtc_time);
+
 #ifndef CONFIG_GENERIC_TIME
 void do_gettimeofday(struct timeval *tv)
 {

drivers/rtc/Kconfig

@@ -692,7 +692,7 @@ config RTC_DRV_GENERIC
 	tristate "Generic RTC support"
 	# Please consider writing a new RTC driver instead of using the generic
 	# RTC abstraction
-	depends on PARISC || M68K || PPC
+	depends on PARISC || M68K || PPC || SUPERH32
 	help
 	  Say Y or M here to enable RTC support on systems using the generic
 	  RTC abstraction. If you do not know what you are doing, you should