diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index ca5c09b241c3..d88a61b11d32 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -83,6 +83,10 @@ config GENERIC_CLOCKEVENTS
 config GENERIC_CLOCKEVENTS_BROADCAST
 	bool
 
+config GENERIC_CMOS_UPDATE
+	def_bool y
+	depends on SH_SH03 || SH_DREAMCAST
+
 config GENERIC_LOCKBREAK
 	def_bool y
 	depends on SMP && PREEMPT
diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index d41ca4cf20cf..77b841a99c01 100644
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -46,6 +46,20 @@ 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;
 
+#ifdef CONFIG_GENERIC_CMOS_UPDATE
+unsigned long read_persistent_clock(void)
+{
+	struct timespec tv;
+	rtc_sh_get_time(&tv);
+	return tv.tv_sec;
+}
+
+int update_persistent_clock(struct timespec now)
+{
+	return rtc_sh_set_time(now.tv_sec);
+}
+#endif
+
 unsigned int get_rtc_time(struct rtc_time *tm)
 {
 	if (rtc_sh_get_time != null_rtc_get_time) {