Change in coreboot[master]: soc/intel/skylake: Implement GPIO ACPI AML generating functions

[Furquan Shaikh (Code Review)]

Hello Duncan Laurie,

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

https://review.coreboot.org/19828

to look at the new patch set (#2).

Change subject: soc/intel/skylake: Implement GPIO ACPI AML generating functions
......................................................................

soc/intel/skylake: Implement GPIO ACPI AML generating functions

Implement GPIO ACPI AML generating functions that can be called by
coreboot drivers to generate GPIO manipulation code in AML. Following
API functions are implemented:

1. acpigen_soc_read_rx_gpio
2. acpigen_soc_get_tx_gpio
3. acpigen_soc_set_tx_gpio
4. acpigen_soc_clear_tx_gpio

In addition to the API functions above, helper functions are added to
gpio.asl to set/clear/get Tx value of GPIO.

BUG=b:62028489

Change-Id: I77e5d0decd8929a922d06b02312378f092551667
Signed-off-by: Furquan Shaikh 
---
M src/soc/intel/skylake/acpi.c
M src/soc/intel/skylake/acpi/gpio.asl
2 files changed, 82 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/19828/2