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soc/intel/common: Add option to call EC _PTS/_WAK methods 

Some embedded controllers expect to be sent a command when the OS
calls the ACPI \_PTS and \_WAK methods.  For example see the code
in ec/google/wilco/acpi/platform.asl that tells the EC when the
methods have been executed by the OS.

Not all ECs may define these methods so this change requires also
setting a Kconfig option to enable it.

Change-Id: I6bf83509423c0fb07c4890986a189cf54afaed10
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/29487
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Duncan Laurie 2018-11-05 16:27:33 -07:00 committed by Duncan Laurie
parent 92332635bf
commit 0dd913510a
2 changed files with 18 additions and 0 deletions
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7
src/soc/intel/common/Kconfig
View File

@ -58,6 +58,13 @@ config SOC_INTEL_COMMON_ACPI
bool
default n
config SOC_INTEL_COMMON_ACPI_EC_PTS_WAK
bool
default n
help
Set this option to have the platform level _PTS/_WAK methods call
methods provided by the Embedded Controller.
config SOC_INTEL_COMMON_NHLT
bool
default n

11
src/soc/intel/common/acpi/platform.asl
View File

@ -33,6 +33,11 @@ Field (POST, ByteAcc, Lock, Preserve)
Method (_PTS, 1)
{
Store (POST_OS_ENTER_PTS, DBG0)
#if IS_ENABLED(CONFIG_SOC_INTEL_COMMON_ACPI_EC_PTS_WAK)
/* Call EC _PTS handler */
\_SB.PCI0.LPCB.EC0.PTS (Arg0)
#endif
}
/* The _WAK method is called on system wakeup */
@ -40,5 +45,11 @@ Method (_PTS, 1)
Method (_WAK, 1)
{
Store (POST_OS_ENTER_WAKE, DBG0)
#if IS_ENABLED(CONFIG_SOC_INTEL_COMMON_ACPI_EC_PTS_WAK)
/* Call EC _WAK handler */
\_SB.PCI0.LPCB.EC0.WAK (Arg0)
#endif
Return (Package(){0,0})
}