modules: gpioaei only on ACPI-supporting archs

Fixes: 9709bda03cd0 ("GPIO: Add ACPI _AEI support")
Pointy-hat to: cperciva
Sponsored by: Amazon

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 s

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>

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sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Add module build stuff for gpioths(4), a driver for DHT11/DHT22 sensors.

modules: gpioaei only on ACPI-supporting archs

Fixes: 9709bda03cd0 ("GPIO: Add ACPI _AEI support")
Pointy-hat to: cperciva
Sponsored by: Amazon

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 s

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>

show more ...

sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Add module build stuff for gpioths(4), a driver for DHT11/DHT22 sensors.

Add gpiokeys to the list of GPIO modules built only if FDT is enabled

When building modules, define make variable OPT_FDT if the kernel config
includes the FDT option. Use OPT_FDT to conditionally compile modules
that require FDT support.

In the past we've gotten awa

When building modules, define make variable OPT_FDT if the kernel config
includes the FDT option. Use OPT_FDT to conditionally compile modules
that require FDT support.

In the past we've gotten away with using the arch name as a proxy for FDT
support in makefile conditional logic, but now mips has some platforms with
fdt support and some without and we need a more direct test.

show more ...

[gpio] add gpiospi to the gpio module.

Add a PPS driver that takes the timing pulse from a gpio pin. Currently
supports only ofw/fdt systems. Some day, hinted attachment for non-fdt
systems should be possible too.

Revert r299739. That did not make it better.
Instead disconnect gpiokeys from the build until it's fixed and buildable;
the SUBDIR list was not ordered properly anyway ;-)

Add loadable module for gpiokeys

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

IFC @230489 (pending review).

Add gpiokeys to the list of GPIO modules built only if FDT is enabled

When building modules, define make variable OPT_FDT if the kernel config
includes the FDT option. Use OPT_FDT to conditionally compile modules
that require FDT support.

In the past we've gotten awa

When building modules, define make variable OPT_FDT if the kernel config
includes the FDT option. Use OPT_FDT to conditionally compile modules
that require FDT support.

In the past we've gotten away with using the arch name as a proxy for FDT
support in makefile conditional logic, but now mips has some platforms with
fdt support and some without and we need a more direct test.

show more ...

[gpio] add gpiospi to the gpio module.

Add a PPS driver that takes the timing pulse from a gpio pin. Currently
supports only ofw/fdt systems. Some day, hinted attachment for non-fdt
systems should be possible too.

Revert r299739. That did not make it better.
Instead disconnect gpiokeys from the build until it's fixed and buildable;
the SUBDIR list was not ordered properly anyway ;-)

Add loadable module for gpiokeys

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

IFC @230489 (pending review).

Allow building the GPIO bus and associated bits as modules.

This is primarily done to save a few bytes here and there on embedded
systems with limited flash space for kernels - a very limited (sub-1

Allow building the GPIO bus and associated bits as modules.

This is primarily done to save a few bytes here and there on embedded
systems with limited flash space for kernels - a very limited (sub-1MB)
space may be available for the kernel and may only support gzip encoding.
The rootfs can be LZMA compressed.

show more ...