Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=57deb52622f3700d154e32662f36cd5f4053f6ed
Commit: 57deb52622f3700d154e32662f36cd5f4053f6ed
Parent: c7d51402d2a64c5b96531f9900bb368020ebbbbb
Author: Alessandro Zummo <[EMAIL PROTECTED]>
AuthorDate: Thu Jul 19 01:49:21 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Thu Jul 19 10:04:52 2007 -0700
RTC: add periodic irq support to rtc-cmos
Adds support for periodic irq enabling in rtc-cmos. This could be used by
the ALSA driver and is already being tested with the zaptel ztdummy module.
Signed-off-by: Alessandro Zummo <[EMAIL PROTECTED]>
Cc: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/rtc/rtc-cmos.c | 33 +++++++++++++++++++++++++++++++--
1 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index e24ea82..5d760bb 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -235,7 +235,7 @@ static int cmos_set_alarm(struct device *dev, struct
rtc_wkalrm *t)
return 0;
}
-static int cmos_set_freq(struct device *dev, int freq)
+static int cmos_irq_set_freq(struct device *dev, int freq)
{
struct cmos_rtc *cmos = dev_get_drvdata(dev);
int f;
@@ -259,6 +259,34 @@ static int cmos_set_freq(struct device *dev, int freq)
return 0;
}
+static int cmos_irq_set_state(struct device *dev, int enabled)
+{
+ struct cmos_rtc *cmos = dev_get_drvdata(dev);
+ unsigned char rtc_control, rtc_intr;
+ unsigned long flags;
+
+ if (!is_valid_irq(cmos->irq))
+ return -ENXIO;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+ rtc_control = CMOS_READ(RTC_CONTROL);
+
+ if (enabled)
+ rtc_control |= RTC_PIE;
+ else
+ rtc_control &= ~RTC_PIE;
+
+ CMOS_WRITE(rtc_control, RTC_CONTROL);
+
+ rtc_intr = CMOS_READ(RTC_INTR_FLAGS);
+ rtc_intr &= (rtc_control & RTC_IRQMASK) | RTC_IRQF;
+ if (is_intr(rtc_intr))
+ rtc_update_irq(cmos->rtc, 1, rtc_intr);
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return 0;
+}
+
#if defined(CONFIG_RTC_INTF_DEV) || defined(CONFIG_RTC_INTF_DEV_MODULE)
static int
@@ -360,7 +388,8 @@ static const struct rtc_class_ops cmos_rtc_ops = {
.read_alarm = cmos_read_alarm,
.set_alarm = cmos_set_alarm,
.proc = cmos_procfs,
- .irq_set_freq = cmos_set_freq,
+ .irq_set_freq = cmos_irq_set_freq,
+ .irq_set_state = cmos_irq_set_state,
};
/*----------------------------------------------------------------*/
-
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