From 682abb1d8aa1b3b088a3f056a74a003492223f8a Mon Sep 17 00:00:00 2001
From: David Brownell <dbrownell@users.sourceforge.net>
Date: Wed, 23 Jul 2008 21:30:46 -0700
Subject: [PATCH] --- yaml --- r: 105489 b: refs/heads/master c:
 449321b39f6c6ebfa15d6da24f134240bd51db29 h: refs/heads/master i:   105487:
 d8d73fadfab7a78f604cf3230a88eea2fa0f756c v: v3

---
 [refs]                             |  2 +-
 trunk/drivers/rtc/rtc-at91rm9200.c | 16 ++++++----------
 2 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/[refs] b/[refs]
index c86a959ad498..15104b06c121 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 773be7ee97c11fbb6b8a912a58b268dbe8a6a3fe
+refs/heads/master: 449321b39f6c6ebfa15d6da24f134240bd51db29
diff --git a/trunk/drivers/rtc/rtc-at91rm9200.c b/trunk/drivers/rtc/rtc-at91rm9200.c
index 9c3db934cc24..cd32d05db773 100644
--- a/trunk/drivers/rtc/rtc-at91rm9200.c
+++ b/trunk/drivers/rtc/rtc-at91rm9200.c
@@ -171,8 +171,10 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
 		| BIN2BCD(tm.tm_mday) << 24
 		| AT91_RTC_DATEEN | AT91_RTC_MTHEN);
 
-	if (alrm->enabled)
+	if (alrm->enabled) {
+		at91_sys_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
 		at91_sys_write(AT91_RTC_IER, AT91_RTC_ALARM);
+	}
 
 	pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
 		at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
@@ -191,28 +193,22 @@ static int at91_rtc_ioctl(struct device *dev, unsigned int cmd,
 
 	pr_debug("%s(): cmd=%08x, arg=%08lx.\n", __func__, cmd, arg);
 
+	/* important:  scrub old status before enabling IRQs */
 	switch (cmd) {
 	case RTC_AIE_OFF:	/* alarm off */
 		at91_sys_write(AT91_RTC_IDR, AT91_RTC_ALARM);
 		break;
 	case RTC_AIE_ON:	/* alarm on */
+		at91_sys_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
 		at91_sys_write(AT91_RTC_IER, AT91_RTC_ALARM);
 		break;
 	case RTC_UIE_OFF:	/* update off */
-	case RTC_PIE_OFF:	/* periodic off */
 		at91_sys_write(AT91_RTC_IDR, AT91_RTC_SECEV);
 		break;
 	case RTC_UIE_ON:	/* update on */
-	case RTC_PIE_ON:	/* periodic on */
+		at91_sys_write(AT91_RTC_SCCR, AT91_RTC_SECEV);
 		at91_sys_write(AT91_RTC_IER, AT91_RTC_SECEV);
 		break;
-	case RTC_IRQP_READ:	/* read periodic alarm frequency */
-		ret = put_user(AT91_RTC_FREQ, (unsigned long *) arg);
-		break;
-	case RTC_IRQP_SET:	/* set periodic alarm frequency */
-		if (arg != AT91_RTC_FREQ)
-			ret = -EINVAL;
-		break;
 	default:
 		ret = -ENOIOCTLCMD;
 		break;