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ec/google/wilco: Add ACPI device for event interface 

Add a separate ACPI device for the Wilco EC event interface so that the
OS drivers can bind to it separately.  Since the event handling is all
done with ACPI and not mailbox calls this will be implemented as a
standard acpi_driver in the kernel.

BUG=b:119046283
TEST=veriy device exists in DSDT

Change-Id: I5259a926fb6d5faea835bcdefa12f0184c5adf4a
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/31204
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Duncan Laurie 2019-02-01 09:37:34 -08:00 committed by Duncan Laurie
parent 286a0ab143
commit aaac678e80
2 changed files with 29 additions and 17 deletions
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28
src/ec/google/wilco/acpi/ec_dev.asl
View File

@ -62,3 +62,31 @@ Device (WLCO)
EndDependentFn ()
})
}
Device (WEVT)
{
Name (_HID, "GOOG000D")
Name (_UID, 1)
Name (_DDN, "Wilco EC Event Interface")
Method (_STA)
{
Return (0xB)
}
/* Get Event Buffer */
Method (QSET, 0, Serialized)
{
/* Get count of event bytes */
Local0 = R (QSEC)
Name (QBUF, Buffer (Local0) {})
/* Fill QS event buffer with Local0 bytes */
For (Local1 = 0, Local1 < Local0, Local1++) {
QBUF[Local1] = R (QSEB)
}
Printf ("QS = %o", QBUF)
Return (QBUF)
}
}

18
src/ec/google/wilco/acpi/event.asl
View File

@ -79,7 +79,7 @@ Method (ECQ2, 1, Serialized)
If (EBIT (E2QS, Arg0)) {
Printf ("QS EVENT")
Notify (^WLCO, 0x90)
Notify (^WEVT, 0x90)
}
}
@ -125,19 +125,3 @@ Method (_Q66, 0, Serialized)
ECQ4 (Local0)
}
}
/* Get Event Buffer */
Method (QSET, 0, Serialized)
{
/* Get count of event bytes */
Local0 = R (QSEC)
Name (QBUF, Buffer (Local0) {})
/* Fill QS event buffer with Local0 bytes */
For (Local1 = 0, Local1 < Local0, Local1++) {
QBUF[Local1] = R (QSEB)
}
Printf ("QS = %o", QBUF)
Return (QBUF)
}