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rtc: max77686: Allow the max77686 rtc to wakeup the system 

This series add support for the Real Time clock present in the Maxim 77802
Power Managment IC.  The version number is quite high because it
previously was part of a bigger series [0] that aimed to add support for
all the devices in the max77802 PMIC.  But now that the max77802
dependencies were already merged for 3.17, the series were split but I
kept the version numbering.

While working on the max77802 rtc support a lot of feedback was given and
the issues pointed out also apply to a driver for a similar PMIC RTC
(max77686).  So patches 01/06 to 05/06 in the series are cleanups for the
max77686 driver and patch 06/06 adds the support for the max77802 RTC.

The series were tested on an Exynos5250 Snow (max77686) and
Exynos5420 Peach Pit (max77802) machines.

This patch (of 6):

The max77686 includes an RTC that keeps power during suspend.  It's
convenient to be able to use it as a wakeup source.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Olof Johansson <olof@lixom.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Doug Anderson 2014-10-13 15:52:55 -07:00 committed by Linus Torvalds
parent d5fae669a9
commit e7f7fc7369
1 changed files with 28 additions and 0 deletions
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28
drivers/rtc/rtc-max77686.c
View File

@ -583,6 +583,33 @@ static void max77686_rtc_shutdown(struct platform_device *pdev)
#endif /* MAX77686_RTC_WTSR_SMPL */
}
#ifdef CONFIG_PM_SLEEP
static int max77686_rtc_suspend(struct device *dev)
{
if (device_may_wakeup(dev)) {
struct max77686_rtc_info *info = dev_get_drvdata(dev);
return enable_irq_wake(info->virq);
}
return 0;
}
static int max77686_rtc_resume(struct device *dev)
{
if (device_may_wakeup(dev)) {
struct max77686_rtc_info *info = dev_get_drvdata(dev);
return disable_irq_wake(info->virq);
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(max77686_rtc_pm_ops,
max77686_rtc_suspend, max77686_rtc_resume);
static const struct platform_device_id rtc_id[] = {
{ "max77686-rtc", 0 },
{},
@ -592,6 +619,7 @@ static struct platform_driver max77686_rtc_driver = {
.driver = {
.name = "max77686-rtc",
.owner = THIS_MODULE,
.pm = &max77686_rtc_pm_ops,
},
.probe = max77686_rtc_probe,
.shutdown = max77686_rtc_shutdown,