Merge remote branch 'rmk/for-linus' into for-linus

* rmk/for-linus: (1557 commits)
  ARM: 6806/1: irq: introduce entry and exit functions for chained handlers
  ARM: 6781/1: Thumb-2: Work around buggy Thumb-2 short branch relocations in gas
  ARM: 6747/1: P2V: Thumb2 support
  ARM: 6798/1: aout-core: zero thread debug registers in a.out core dump
  ARM: 6796/1: Footbridge: Fix I/O mappings for NOMMU mode
  ARM: 6784/1: errata: no automatic Store Buffer drain on Cortex-A9
  ARM: 6772/1: errata: possible fault MMU translations following an ASID switch
  ARM: 6776/1: mach-ux500: activate fix for errata 753970
  ARM: 6794/1: SPEAr: Append UL to device address macros.
  ARM: 6793/1: SPEAr: Remove unused *_SIZE macros from spear*.h files
  ARM: 6792/1: SPEAr: Replace SIZE macro's with SZ_4K macros
  ARM: 6791/1: SPEAr3xx: Declare device structures after shirq code
  ARM: 6790/1: SPEAr: Clock Framework: Rename usbd clock and align apb_clk entry
  ARM: 6789/1: SPEAr3xx: Rename sdio to sdhci
  ARM: 6788/1: SPEAr: Include mach/hardware.h instead of mach/spear.h
  ARM: 6787/1: SPEAr: Reorder #includes in .h & .c files.
  ARM: 6681/1: SPEAr: add debugfs support to clk API
  ARM: 6703/1: SPEAr: update clk API support
  ARM: 6679/1: SPEAr: make clk API functions more generic
  ARM: 6737/1: SPEAr: formalized timer support
  ...

Conflicts:
	arch/arm/mach-msm/board-msm7x27.c
	arch/arm/mach-msm/board-msm7x30.c
	arch/arm/mach-msm/board-qsd8x50.c
	arch/arm/mach-msm/board-sapphire.c
	arch/arm/mach-msm/include/mach/memory.h

1 files changed, 57 insertions, 26 deletions

diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 90384b9f6b2c..cb2f0728fd70 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -16,6 +16,9 @@
 #include <linux/log2.h>
 #include <linux/workqueue.h>
 
+static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer);
+static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer);
+
 static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)
 {
 	int err;
@@ -120,12 +123,18 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
 	err = mutex_lock_interruptible(&rtc->ops_lock);
 	if (err)
 		return err;
-	alarm->enabled = rtc->aie_timer.enabled;
-	if (alarm->enabled)
+	if (rtc->ops == NULL)
+		err = -ENODEV;
+	else if (!rtc->ops->read_alarm)
+		err = -EINVAL;
+	else {
+		memset(alarm, 0, sizeof(struct rtc_wkalrm));
+		alarm->enabled = rtc->aie_timer.enabled;
 		alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires);
+	}
 	mutex_unlock(&rtc->ops_lock);
 
-	return 0;
+	return err;
 }
 EXPORT_SYMBOL_GPL(rtc_read_alarm);
 
@@ -175,16 +184,14 @@ int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
 		return err;
 	if (rtc->aie_timer.enabled) {
 		rtc_timer_remove(rtc, &rtc->aie_timer);
-		rtc->aie_timer.enabled = 0;
 	}
 	rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time);
 	rtc->aie_timer.period = ktime_set(0, 0);
 	if (alarm->enabled) {
-		rtc->aie_timer.enabled = 1;
-		rtc_timer_enqueue(rtc, &rtc->aie_timer);
+		err = rtc_timer_enqueue(rtc, &rtc->aie_timer);
 	}
 	mutex_unlock(&rtc->ops_lock);
-	return 0;
+	return err;
 }
 EXPORT_SYMBOL_GPL(rtc_set_alarm);
 
@@ -195,16 +202,15 @@ int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled)
 		return err;
 
 	if (rtc->aie_timer.enabled != enabled) {
-		if (enabled) {
-			rtc->aie_timer.enabled = 1;
-			rtc_timer_enqueue(rtc, &rtc->aie_timer);
-		} else {
+		if (enabled)
+			err = rtc_timer_enqueue(rtc, &rtc->aie_timer);
+		else
 			rtc_timer_remove(rtc, &rtc->aie_timer);
-			rtc->aie_timer.enabled = 0;
-		}
 	}
 
-	if (!rtc->ops)
+	if (err)
+		/* nothing */;
+	else if (!rtc->ops)
 		err = -ENODEV;
 	else if (!rtc->ops->alarm_irq_enable)
 		err = -EINVAL;
@@ -222,6 +228,12 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)
 	if (err)
 		return err;
 
+#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
+	if (enabled == 0 && rtc->uie_irq_active) {
+		mutex_unlock(&rtc->ops_lock);
+		return rtc_dev_update_irq_enable_emul(rtc, 0);
+	}
+#endif
 	/* make sure we're changing state */
 	if (rtc->uie_rtctimer.enabled == enabled)
 		goto out;
@@ -235,15 +247,22 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)
 		now = rtc_tm_to_ktime(tm);
 		rtc->uie_rtctimer.node.expires = ktime_add(now, onesec);
 		rtc->uie_rtctimer.period = ktime_set(1, 0);
-		rtc->uie_rtctimer.enabled = 1;
-		rtc_timer_enqueue(rtc, &rtc->uie_rtctimer);
-	} else {
+		err = rtc_timer_enqueue(rtc, &rtc->uie_rtctimer);
+	} else
 		rtc_timer_remove(rtc, &rtc->uie_rtctimer);
-		rtc->uie_rtctimer.enabled = 0;
-	}
 
 out:
 	mutex_unlock(&rtc->ops_lock);
+#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
+	/*
+	 * Enable emulation if the driver did not provide
+	 * the update_irq_enable function pointer or if returned
+	 * -EINVAL to signal that it has been configured without
+	 * interrupts or that are not available at the moment.
+	 */
+	if (err == -EINVAL)
+		err = rtc_dev_update_irq_enable_emul(rtc, enabled);
+#endif
 	return err;
 
 }
@@ -259,7 +278,7 @@ EXPORT_SYMBOL_GPL(rtc_update_irq_enable);
  *
  * Triggers the registered irq_task function callback.
  */
-static void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode)
+void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode)
 {
 	unsigned long flags;
 
@@ -460,6 +479,9 @@ int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq)
 	int err = 0;
 	unsigned long flags;
 
+	if (freq <= 0)
+		return -EINVAL;
+
 	spin_lock_irqsave(&rtc->irq_task_lock, flags);
 	if (rtc->irq_task != NULL && task == NULL)
 		err = -EBUSY;
@@ -488,10 +510,13 @@ EXPORT_SYMBOL_GPL(rtc_irq_set_freq);
  * Enqueues a timer onto the rtc devices timerqueue and sets
  * the next alarm event appropriately.
  *
+ * Sets the enabled bit on the added timer.
+ *
  * Must hold ops_lock for proper serialization of timerqueue
  */
-void rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)
+static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)
 {
+	timer->enabled = 1;
 	timerqueue_add(&rtc->timerqueue, &timer->node);
 	if (&timer->node == timerqueue_getnext(&rtc->timerqueue)) {
 		struct rtc_wkalrm alarm;
@@ -501,7 +526,13 @@ void rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)
 		err = __rtc_set_alarm(rtc, &alarm);
 		if (err == -ETIME)
 			schedule_work(&rtc->irqwork);
+		else if (err) {
+			timerqueue_del(&rtc->timerqueue, &timer->node);
+			timer->enabled = 0;
+			return err;
+		}
 	}
+	return 0;
 }
 
 /**
@@ -512,13 +543,15 @@ void rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)
  * Removes a timer onto the rtc devices timerqueue and sets
  * the next alarm event appropriately.
  *
+ * Clears the enabled bit on the removed timer.
+ *
  * Must hold ops_lock for proper serialization of timerqueue
  */
-void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer)
+static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer)
 {
 	struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue);
 	timerqueue_del(&rtc->timerqueue, &timer->node);
-
+	timer->enabled = 0;
 	if (next == &timer->node) {
 		struct rtc_wkalrm alarm;
 		int err;
@@ -626,8 +659,7 @@ int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer* timer,
 	timer->node.expires = expires;
 	timer->period = period;
 
-	timer->enabled = 1;
-	rtc_timer_enqueue(rtc, timer);
+	ret = rtc_timer_enqueue(rtc, timer);
 
 	mutex_unlock(&rtc->ops_lock);
 	return ret;
@@ -645,7 +677,6 @@ int rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer* timer)
 	mutex_lock(&rtc->ops_lock);
 	if (timer->enabled)
 		rtc_timer_remove(rtc, timer);
-	timer->enabled = 0;
 	mutex_unlock(&rtc->ops_lock);
 	return ret;
 }