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Diffstat (limited to 'src/ec/compal/ene932/documentation.txt')
| -rw-r--r-- | src/ec/compal/ene932/documentation.txt | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/ec/compal/ene932/documentation.txt b/src/ec/compal/ene932/documentation.txt new file mode 100644 index 000000000000..eeb801a73f95 --- /dev/null +++ b/src/ec/compal/ene932/documentation.txt @@ -0,0 +1,23 @@ + +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 EC'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 corresponding + 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. |