RTC: Convert rtc drivers to use the alarm_irq_enable method

Some rtc drivers use the ioctl method instead of the alarm_irq_enable
method for enabling alarm interupts. With the new virtualized RTC
rework, its important for drivers to use the alarm_irq_enable instead.

This patch converts the drivers that use the AIE ioctl method to
use the alarm_irq_enable method. Other ioctl cmds are left untouched.

I have not been able to test or even compile most of these drivers.
Any help to make sure this change is correct would be appreciated!

CC: Alessandro Zummo <a.zummo@towertech.it>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
Reported-by: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
Tested-by: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
Signed-off-by: John Stultz <john.stultz@linaro.org>

1 files changed, 13 insertions, 7 deletions

diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index bc8bbca9a2e2..26d1cf5d19ae 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -195,13 +195,6 @@ static int at91_rtc_ioctl(struct device *dev, unsigned int cmd,
 
         /* 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 */
                 at91_sys_write(AT91_RTC_IDR, AT91_RTC_SECEV);
                 break;
@@ -217,6 +210,18 @@ static int at91_rtc_ioctl(struct device *dev, unsigned int cmd,
         return ret;
 }
 
+static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+        pr_debug("%s(): cmd=%08x\n", __func__, enabled);
+
+        if (enabled) {
+                at91_sys_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
+                at91_sys_write(AT91_RTC_IER, AT91_RTC_ALARM);
+        } else
+                at91_sys_write(AT91_RTC_IDR, AT91_RTC_ALARM);
+
+        return 0;
+}
 /*
  * Provide additional RTC information in /proc/driver/rtc
  */
@@ -270,6 +275,7 @@ static const struct rtc_class_ops at91_rtc_ops = {
         .read_alarm     = at91_rtc_readalarm,
         .set_alarm      = at91_rtc_setalarm,
         .proc           = at91_rtc_proc,
+        .alarm_irq_enable = at91_rtc_alarm_irq_enable,
 };
 
 /*