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| author | Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br> | 2011-02-07 19:16:07 -0200 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2011-03-09 11:25:07 -0800 |
| commit | a417493ef916b8b6d1782a589766a713c553842e (patch) | |
| tree | f19875bbf0dec0bc3d07149b4ba498434edeb763 /drivers/rtc/rtc-test.c | |
| parent | 4cebe7aadc9ee8e7b44857b7aba3a878870cef65 (diff) | |
| download | linux-a417493ef916b8b6d1782a589766a713c553842e.tar.gz linux-a417493ef916b8b6d1782a589766a713c553842e.tar.bz2 linux-a417493ef916b8b6d1782a589766a713c553842e.zip | |
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@linutronix.de>
CC: Alessandro Zummo <a.zummo@towertech.it>
CC: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
CC: rtc-linux@googlegroups.com
Signed-off-by: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'drivers/rtc/rtc-test.c')
| -rw-r--r-- | 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 a82d6fe97076..7e96254bd365 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; |