[coreboot-gerrit] Change in coreboot[master]: drivers/generic: Add new driver for power resource pseudo device

[Tim Wawrzynczak (Code Review)]

Hello Patrick Rudolph, Julius Werner, Subrata Banik, Paul Menzel, build bot (Jenkins), Nico Huber, Patrick Georgi, Furquan Shaikh, Martin Roth,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/35036

to look at the new patch set (#5).

Change subject: drivers/generic: Add new driver for power resource pseudo device
......................................................................

drivers/generic: Add new driver for power resource pseudo device

There is some duplication of fields dealing with ACPI power resources
(see drivers/i2c/generic.c, also used by drivers/i2c/hid, as well as
drivers/spi/acpi).  This CL creates a new driver for this pseudo-device.

This patch allows a new style of dealing with power resources in the
device tree:

device pci 00.0
    chip drivers/generic/power_resource
    	register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_A1)"
    	device generic 0 on
    		chip drivers/i2c/generic
    			register ...
    		end
    	end
    end
end

and then the power resource driver does most of the work.  This should
make it easier to support other drivers requiring ACPI power resources
in the future (see the diff in the two changed here).

I tested this patch on a device using ACPI power resources, and it was
successfully able to invoke the _ON and _OFF routines for the device,
both with the new-style and old-style way of creating power resources.

My hope would be to update device trees in later patches to accomodate
this new style, and then deprecate the old style.

Change-Id: I358c48f4d4e4c4ef591ecf09ea9e9488c2652c96
Signed-off-by: Tim Wawrzynczak 
---
M src/arch/x86/acpi_device.c
M src/arch/x86/acpigen.c
M src/arch/x86/include/arch/acpi_device.h
M src/arch/x86/include/arch/acpigen.h
M src/device/root_device.c
A src/drivers/generic/power_resource/Makefile.inc
A src/drivers/generic/power_resource/chip.h
A src/drivers/generic/power_resource/power_resource.c
M src/drivers/i2c/generic/generic.c
M src/drivers/spi/acpi/acpi.c
10 files changed, 242 insertions(+), 52 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/36/35036/5