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authorStefan Agner <stefan@agner.ch>2015-05-21 17:29:35 +0200
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2015-06-25 01:13:38 +0200
commit119434f44c78df8c4b6d67f835448542a4bd7e91 (patch)
tree2b04a007a701505d64b3107e33117a19cb9209f0 /drivers/rtc/rtc-snvs.c
parentrtc: rtc-v3020: use gpio_request_array() (diff)
downloadlinux-119434f44c78df8c4b6d67f835448542a4bd7e91.tar.xz
linux-119434f44c78df8c4b6d67f835448542a4bd7e91.zip
rtc: snvs: fix wakealarm by call enable_irq_wake earlier
When entering suspend while an wakeup alarm is set, enable_set_wake should make sure that the RTC interrupt keep being enabled and the .irq_set_wake for the RTC interrupt get called. However, since the driver uses the suspend_noirq callback, the call to enable_irq_wake has been made after disabling the interrupts. While .irq_set_wake has been called properly, the interrupt remained disabled. Use the suspend callback to call enable_irq_wake early enough to ensure the RTC interrupt remains enabled. Fixes: 7654e9d4fd8f ("drivers/rtc/rtc-snvs: fix suspend/resume") Cc: <stable@vger.kernel.org> # 3.19 Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc/rtc-snvs.c')
-rw-r--r--drivers/rtc/rtc-snvs.c30
1 files changed, 21 insertions, 9 deletions
diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index 0479e807a776..d87a85cefb66 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -322,6 +322,13 @@ static int snvs_rtc_suspend(struct device *dev)
if (device_may_wakeup(dev))
enable_irq_wake(data->irq);
+ return 0;
+}
+
+static int snvs_rtc_suspend_noirq(struct device *dev)
+{
+ struct snvs_rtc_data *data = dev_get_drvdata(dev);
+
if (data->clk)
clk_disable_unprepare(data->clk);
@@ -331,23 +338,28 @@ static int snvs_rtc_suspend(struct device *dev)
static int snvs_rtc_resume(struct device *dev)
{
struct snvs_rtc_data *data = dev_get_drvdata(dev);
- int ret;
if (device_may_wakeup(dev))
- disable_irq_wake(data->irq);
+ return disable_irq_wake(data->irq);
- if (data->clk) {
- ret = clk_prepare_enable(data->clk);
- if (ret)
- return ret;
- }
+ return 0;
+}
+
+static int snvs_rtc_resume_noirq(struct device *dev)
+{
+ struct snvs_rtc_data *data = dev_get_drvdata(dev);
+
+ if (data->clk)
+ return clk_prepare_enable(data->clk);
return 0;
}
static const struct dev_pm_ops snvs_rtc_pm_ops = {
- .suspend_noirq = snvs_rtc_suspend,
- .resume_noirq = snvs_rtc_resume,
+ .suspend = snvs_rtc_suspend,
+ .suspend_noirq = snvs_rtc_suspend_noirq,
+ .resume = snvs_rtc_resume,
+ .resume_noirq = snvs_rtc_resume_noirq,
};
#define SNVS_RTC_PM_OPS (&snvs_rtc_pm_ops)