Patch set updated for coreboot: e4a9642 ec/compal/ene932/acpi: Let mainboard define the ACPI lid object

[Alexandru Gagniuc]

Alexandru Gagniuc ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5444

-gerrit

commit e4a9642ecbd3c1a348ec400a18690e9098302e6b
Author: Alexandru Gagniuc 
Date:   Tue Apr 1 16:02:08 2014 -0500

ec/compal/ene932/acpi: Let mainboard define the ACPI lid object

The GP15 ACPI object was used to get the state of the lid. However
    GP15 is specific to certain Intel chipsets, and will not always be in
    the ACPI namespace. Instead of hardcoding this object, let the
    mainboard define it.

Also, document the ACPI interface for the EC.

Change-Id: I02a2eb3116af61ea5701f84507327aa40218597a
    Signed-off-by: Alexandru Gagniuc 
---
 src/ec/compal/ene932/acpi/ec.asl        |  2 +-
 src/ec/compal/ene932/documentation.txt  | 24 ++++++++++++++++++++++++
 src/mainboard/google/parrot/acpi/ec.asl |  3 +++
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/src/ec/compal/ene932/acpi/ec.asl b/src/ec/compal/ene932/acpi/ec.asl
index cb50a21..a042d75 100644
--- a/src/ec/compal/ene932/acpi/ec.asl
+++ b/src/ec/compal/ene932/acpi/ec.asl
@@ -273,7 +273,7 @@ Device (EC0)
    	Store (ADPT, \PWRS)

// Initialize LID switch state
-		Store (GP15, \LIDS)
+		Store (EC_ACPI_LID_SWITCH_OBJECT, \LIDS)

// Force a read of CPU temperature
    	Store (CTML, Local0)
diff --git a/src/ec/compal/ene932/documentation.txt b/src/ec/compal/ene932/documentation.txt
new file mode 100644
index 0000000..97fa80a
--- /dev/null
+++ b/src/ec/compal/ene932/documentation.txt
@@ -0,0 +1,24 @@
+
+Accessing the EC space
+======================
+
+The ACPI implementation uses the standard I/O ports 0x62 and 0x66 to access the
+EC functionality. Accesses to these ports must be directed to the LPC bus to
+which the EC is connected.
+
+
+Interfacing with the ASL files
+==============================
+
+The mainboard code must define several variables for the ASL files.
+
+* EC_SCI
+  Defines the General Purpose Event (GPE) corresponding to the embedded
+  controller's SCI line.
+* EC_ACPI_LID_SWITCH_OBJECT
+  Defines the APCI object which reads the state of the lid, with 0 = open, and
+  1 = closed. This is usually the bit which reads the GPIO input coresponding to
+  the lid switch.
+* PNOT()
+  The mainboard must define a PNOT method to handle power state notifications
+  and Notify CPU device objects to re-evaluate their _PPC and _CST tables.
diff --git a/src/mainboard/google/parrot/acpi/ec.asl b/src/mainboard/google/parrot/acpi/ec.asl
index 522a0b9..a0ee9d5 100644
--- a/src/mainboard/google/parrot/acpi/ec.asl
+++ b/src/mainboard/google/parrot/acpi/ec.asl
@@ -21,5 +21,8 @@
 #include "../ec.h"
 #define EC_SCI 23      // GPIO7 << 16 to GPE bit for Runtime SCI

+/* GP15 is defined in the southbridge's ASL */
+#define EC_ACPI_LID_SWITCH_OBJECT	GP15
+
 /* ACPI code for EC functions */
 #include "../../../../ec/compal/ene932/acpi/ec.asl"