David Stevens 00af43e1b5 Reland "devices: cmos: implement rtc alarm" ... This is a reland of commit 42a437de5e This change fixes a crash that occurs when no-rtc is set by properly checking the Option that can contain the cmos's control tube, instead of just calling unwrap. It also replaces an unwrap during cmos initialization with proper error propagation. Original change's description: > devices: cmos: implement rtc alarm > > Implement CMOS alarm functionality. This allows guests to set rtc > alarms, which is useful when putting a Linux guest into s2idle. > > This change allocates a dedicated interrupt for the goldfish battery, > instead of reusing the sci irq. Sharing an irq line between a wakeup > interrupt and a non-wakeup interrupt doesn't work well because the > non-wakeup interrupt won't be delivered to its driver while the driver > is suspended, which results in the irq being permanently asserted. > Simply using a dedicated interrupt for the goldfish battery is much > easier than adding suspend/resume support to the Linux driver. > > BUG=None > TEST=cargo test -p devices cmos, manual tests w/rtcwake > > Change-Id: I757acc64b61e414d5d9df5a1fb4770943ef985bf > Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4314184 > Reviewed-by: Elie Kheirallah <khei@google.com> > Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> > Commit-Queue: David Stevens <stevensd@chromium.org> BUG=None TEST=cargo test -p devices cmos, manual tests w/rtcwake and no-rtc Change-Id: Iec73c0aa08b4f2081c3b7a824254723ea9da5365 Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4364558 Reviewed-by: Elie Kheirallah <khei@google.com> Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> Commit-Queue: David Stevens <stevensd@chromium.org> Auto-Submit: David Stevens <stevensd@chromium.org>		2023-03-27 04:46:32 +00:00
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src	Reland "devices: cmos: implement rtc alarm"	2023-03-27 04:46:32 +00:00
.build_test_skip
Cargo.toml