Commit-ID: a417493ef916b8b6d1782a589766a713c553842e
Gitweb: http://git.kernel.org/tip/a417493ef916b8b6d1782a589766a713c553842e
Author: Marcelo Roberto Jimenez <mroberto@xxxxxxxxxxxxxxxxxxxxx>
AuthorDate: Mon, 7 Feb 2011 19:16:07 -0200
Committer: John Stultz <john.stultz@xxxxxxxxxx>
CommitDate: Wed, 9 Mar 2011 11:25:07 -0800
RTC: Fix the cross interrupt issue on rtc-test.
The rtc-test driver is meant to provide a test/debug code for the RTC
subsystem.
The rtc-test driver simulates specific interrupts by echoing to the
sys interface. Those were the update, alarm and periodic interrupts.
As a side effect of the new implementation, any interrupt generated in
the rtc-test driver would trigger the same code path in the generic
code, and thus the distinction among interrupts gets lost.
This patch preserves the previous behaviour of the rtc-test driver,
where e.g. an update interrupt would not trigger an alarm or periodic
interrupt, and vice-versa. In real world RTC drivers, this is not an
issue, but in the rtc-test driver it may be interesting to distinguish
these interrupts for testing purposes.
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CC: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
CC: Marcelo Roberto Jimenez <mroberto@xxxxxxxxxxxxxxxxxxxxx>
CC: rtc-linux@xxxxxxxxxxxxxxxx
Signed-off-by: Marcelo Roberto Jimenez <mroberto@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
drivers/rtc/rtc-test.c | 13 +++++++++----
1 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
index a82d6fe..7e96254 100644
--- a/drivers/rtc/rtc-test.c
+++ b/drivers/rtc/rtc-test.c
@@ -78,11 +78,16 @@ static ssize_t test_irq_store(struct device *dev,
struct rtc_device *rtc = platform_get_drvdata(plat_dev);
retval = count;
- if (strncmp(buf, "tick", 4) == 0)
+ if (strncmp(buf, "tick", 4) == 0 && rtc->pie_enabled)
rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);
- else if (strncmp(buf, "alarm", 5) == 0)
- rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
- else if (strncmp(buf, "update", 6) == 0)
+ else if (strncmp(buf, "alarm", 5) == 0) {
+ struct rtc_wkalrm alrm;
+ int err = rtc_read_alarm(rtc, &alrm);
+
+ if (!err && alrm.enabled)
+ rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
+
+ } else if (strncmp(buf, "update", 6) == 0 && rtc->uie_rtctimer.enabled)
rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);
else
retval = -EINVAL;
--
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