[AxxzyWasTaken]

apple-pmu-rtc binds to the rtc child of the PMU's SPMI node, but apple-spmi-nvmem only populates children on Baku and Abbey PMICs. J616C (M4 Max) has a Chapel PMU with the Abbey alarm layout, so the node in #914 never became a device, and the machine had no RTC wake alarm.

This populates the children of a Chapel PMIC too.

Testing
On a 32-core J616C, with #914's device tree on a slightly older 7.3 base:

• rtc1 registers as apple-pmu-rtc with a wakealarm.
• With a 45-second alarm, s2idle exited on its own after 45 seconds.

The driver also compiles on the current base.

[RyanTheTide]

Merge train (MTL, 06/11): can't take this yet. Commit 40fada3 ("nvmem: apple-spmi: populate the RTC child of a Chapel PMIC") has no Signed-off-by: from its author, and a sign-off is a hard requirement here (we can't add one on someone else's behalf). Could you amend with git commit --amend -s (or git rebase --signoff) and force-push the branch? I'll gate it again once it's signed.

[AxxzyWasTaken]

Signed off and force-pushed. No code change.

[RyanTheTide]

Merge train (MTR, 06/11): merging, now signed off. This adds one compatible to the populate check, so Baku and Abbey PMICs behave exactly as before. The hardware proof is the author's J616C test: rtc1 registered and a 45 s s2idle wake.

Gates: test merge 2d3579ef = integration/aurora 11eccbe + #1005 #994 #930 #658 #992 #1006 #1007 #1008 #531 (#992 has since landed on its own); base 11eccbe.

• KUnit: drm/apple 112/113 (1 skip); Rust (asahi, incl. asahi_g17_validation_pages) 200/201 (1 skip); arm64 apple-isp-*, apple-pmc, apple-pmgr-pwrstate and thunderbolt 137/138 (1 skip).
• W=1 on drm/apple, media/apple/isp, pmdomain/apple, thunderbolt and nvmem/apple-spmi-nvmem: 0 new warnings.
• dt_binding_check (apple,dcp, apple,dart, apple,t8132-isp, apple,spmi-nvmem, apple,pmc): 0 new.
• Host tests run-host-tests.py 185/185; apple-dcp selftests 86/86.

Hardware (7.3.0-aurora-mtr1106a, one-shot boots, fleet recipe):

• J616s (M4 Pro) vs fleet17: 0 kernel errors, 0 AVC, 0 failed units; eDP + DP-2, Wi-Fi, Vulkan G16S. Camera NV12 1080p and 720p, and P010 720p, streamed 30 frames each, with no ISP errors. vkcube OK; glmark2 6617/6738/6683 vs fleet17 6646/6555/6664.
• Neo (A18 Pro), two boots vs fleet16: 0 kernel errors, 0 AVC, os_uuid pin present; eDP, Wi-Fi, Vulkan G17P. Camera NV12 1080p and 720p, no ISP errors. vkcube OK; glmark2 2718/2729/2726/2725 vs fleet16 2043–2108; 0 GPU faults.
• Both Macs were restored to their default kernels afterwards.