Diffusion FreeBSD src repository 9709bda03cd0

GPIO: Add ACPI _AEI support
9709bda03cd0
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Description

GPIO: Add ACPI _AEI support

Changes to acpi_gpiobus.c handle discovering and parsing the _AEI
objects and storing necessary data in device ivars. A new gpioaei.c
file implements the device, which simply requests an interrupt when
the pin is triggered and invokes the appropriate _Exx or _Lxx ACPI
method.

This makes the GPIO "power button" work on arm64 Graviton systems,
allowing EC2 "Stop"/"Reboot" instance calls to be handled cleanly.
(Prior to this change, those requests would time out after 4 minutes
and the instance would be forcibly killed.)

Reviwed by: imp, andrew, Ahmad Khalifa
MFC after: 3 days
Sponsored by: Amazon
Differential Revision: https://reviews.freebsd.org/D47253
Co-authored-by: Andrew Turner <andrew@FreeBSD.org>

Details

Provenance

Authored on Tue, Oct 22, 6:53 PM

Differential Revision

D47253: GPIO: Add ACPI _AEI support

Parents

rG310743c4ccc5: LinuxKPI: 802.11: improvements to (*ampdu_action)() callers

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Event Timeline

cperciva committed rG9709bda03cd0: GPIO: Add ACPI _AEI support (authored by cperciva).Thu, Oct 31, 9:26 PM

cperciva added an edge: D47253: GPIO: Add ACPI _AEI support.

cperciva mentioned this in rG6540ac118473: modules: gpioaei only on ACPI-supporting archs.Thu, Oct 31, 10:47 PM

rpokala mentioned this in rGbb8b3b174118: modules: gpioaei: Fix arm64.LINT-FDT breakage.Sat, Nov 2, 5:14 AM

cperciva mentioned this in rG5a53843aef49: modules: gpioaei only on ACPI-supporting archs.Sun, Nov 3, 4:03 PM

cperciva mentioned this in rGc2cd78d9446e: GPIO: Add ACPI _AEI support.

cperciva mentioned this in rG393bbd23b344: modules: gpioaei: Fix arm64.LINT-FDT breakage.

cperciva mentioned this in rG3166167784b9: modules: gpioaei only on ACPI-supporting archs.Sun, Nov 3, 4:17 PM

cperciva mentioned this in rGac2e98ed5707: modules: gpioaei: Fix arm64.LINT-FDT breakage.

cperciva mentioned this in rG1db6ffb2a482: GPIO: Add ACPI _AEI support.

Changes (7)

Path

Size

sys/

conf/

dev/

gpio/

modules/

gpio/

	gpioaei/
	gpioths/

	sys/	dev/	gpio/
	lib/	libc/	gen/

	acpi_gpiobusvar.h
	libc_dlopen.c

rG9709bda03cd0

sys/conf/files

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sys/dev/gpio/acpi_gpiobus.c

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sys/dev/gpio/acpi_gpiobusvar.h

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sys/dev/gpio/gpioaei.c

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sys/modules/gpio/Makefile

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sys/modules/gpio/gpioaei/Makefile

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