drivers/rtc/rtc-jz4740.c: add alarm function

Add the "alarm" function to the jz4740 RTC.  Interrupts will now be raised
when the "alarm" time is reached.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 40 insertions, 5 deletions

diff --git a/drivers/rtc/rtc-jz4740.c b/drivers/rtc/rtc-jz4740.c
index 2619d57b91d7..2e16f72c9056 100644
--- a/drivers/rtc/rtc-jz4740.c
+++ b/drivers/rtc/rtc-jz4740.c
@@ -1,5 +1,6 @@
 /*
  *  Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
+ *  Copyright (C) 2010, Paul Cercueil <paul@crapouillou.net>
  *       JZ4740 SoC RTC driver
  *
  *  This program is free software; you can redistribute it and/or modify it
@@ -161,7 +162,8 @@ static int jz4740_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 
         ret = jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC_ALARM, secs);
         if (!ret)
-                ret = jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_AE, alrm->enabled);
+                ret = jz4740_rtc_ctrl_set_bits(rtc,
+                        JZ_RTC_CTRL_AE | JZ_RTC_CTRL_AF_IRQ, alrm->enabled);
 
         return ret;
 }
@@ -258,6 +260,8 @@ static int __devinit jz4740_rtc_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, rtc);
 
+        device_init_wakeup(&pdev->dev, 1);
+
         rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, &jz4740_rtc_ops,
                                         THIS_MODULE);
         if (IS_ERR(rtc->rtc)) {
@@ -318,12 +322,43 @@ static int __devexit jz4740_rtc_remove(struct platform_device *pdev)
         return 0;
 }
 
+
+#ifdef CONFIG_PM
+static int jz4740_rtc_suspend(struct device *dev)
+{
+        struct jz4740_rtc *rtc = dev_get_drvdata(dev);
+
+        if (device_may_wakeup(dev))
+                enable_irq_wake(rtc->irq);
+        return 0;
+}
+
+static int jz4740_rtc_resume(struct device *dev)
+{
+        struct jz4740_rtc *rtc = dev_get_drvdata(dev);
+
+        if (device_may_wakeup(dev))
+                disable_irq_wake(rtc->irq);
+        return 0;
+}
+
+static const struct dev_pm_ops jz4740_pm_ops = {
+        .suspend = jz4740_rtc_suspend,
+        .resume  = jz4740_rtc_resume,
+};
+#define JZ4740_RTC_PM_OPS (&jz4740_pm_ops)
+
+#else
+#define JZ4740_RTC_PM_OPS NULL
+#endif  /* CONFIG_PM */
+
 struct platform_driver jz4740_rtc_driver = {
-        .probe = jz4740_rtc_probe,
-        .remove = __devexit_p(jz4740_rtc_remove),
-        .driver = {
-                .name = "jz4740-rtc",
+        .probe   = jz4740_rtc_probe,
+        .remove  = __devexit_p(jz4740_rtc_remove),
+        .driver  = {
+                .name  = "jz4740-rtc",
                 .owner = THIS_MODULE,
+                .pm    = JZ4740_RTC_PM_OPS,
         },
 };