drivers/rtc/rtc-sirfsoc.c: add alarm_irq_enable support

Add missed alarm_irq_enable() callback for CSR SiRFSoC RTCs.

[akpm@linux-foundation.org: remove unneeded cast]
Signed-off-by: hao liu <hao.liu@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 26 insertions, 1 deletions

diff --git a/drivers/rtc/rtc-sirfsoc.c b/drivers/rtc/rtc-sirfsoc.c
index 24ba97d3286e..a9ea7d181380 100644
--- a/drivers/rtc/rtc-sirfsoc.c
+++ b/drivers/rtc/rtc-sirfsoc.c
@@ -209,12 +209,37 @@ static int sirfsoc_rtc_ioctl(struct device *dev, unsigned int cmd,
         }
 }
 
+static int sirfsoc_rtc_alarm_irq_enable(struct device *dev,
+                unsigned int enabled)
+{
+        unsigned long rtc_status_reg = 0x0;
+        struct sirfsoc_rtc_drv *rtcdrv;
+
+        rtcdrv = dev_get_drvdata(dev);
+
+        local_irq_disable();
+
+        rtc_status_reg = sirfsoc_rtc_iobrg_readl(
+                                rtcdrv->rtc_base + RTC_STATUS);
+        if (enabled)
+                rtc_status_reg |= SIRFSOC_RTC_AL0E;
+        else
+                rtc_status_reg &= ~SIRFSOC_RTC_AL0E;
+
+        sirfsoc_rtc_iobrg_writel(rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS);
+        local_irq_enable();
+
+        return 0;
+
+}
+
 static const struct rtc_class_ops sirfsoc_rtc_ops = {
         .read_time = sirfsoc_rtc_read_time,
         .set_time = sirfsoc_rtc_set_time,
         .read_alarm = sirfsoc_rtc_read_alarm,
         .set_alarm = sirfsoc_rtc_set_alarm,
-        .ioctl = sirfsoc_rtc_ioctl
+        .ioctl = sirfsoc_rtc_ioctl,
+        .alarm_irq_enable = sirfsoc_rtc_alarm_irq_enable
 };
 
 static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata)