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authorDaniel Drake <dsd@laptop.org>2012-05-10 00:08:43 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2012-05-29 21:20:23 +0200
commitc10d7a13846bffa5c77f1122500b687ab902e2d2 (patch)
tree0ccc77e7931cb6bda11cc4d24caaebf5aea28246 /drivers/rtc
parent76e10d158efb6d4516018846f60c2ab5501900bc (diff)
ACPI / PM: Generate wakeup events on fixed power button
When the system is woken up by the ACPI fixed power button, currently there is no way of userspace becoming aware that the power button was pressed. OLPC would like to know this, so that we can respond appropriately. For example, if the system was woken up by a network packet, we know we can go back to sleep very quickly. But if the user explicitly woke the system with the power button, we're going to want to stay awake for a while. The wakeup count mechanism seems like a good fit for communicating this. Mark the fixed power button as wakeup-enabled, and increment its wakeup counter when the system is woken with the power button. (The wakeup counter is also incremented when the power button is pressed during system operation; this is already handled by an existing acpi-button codepath). Signed-off-by: Daniel Drake <dsd@laptop.org> Acked-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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