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-rw-r--r--src/ec/google/chromeec/acpi/ec.asl16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/ec/google/chromeec/acpi/ec.asl b/src/ec/google/chromeec/acpi/ec.asl
index 7fb2f2449d..b2e65d0e31 100644
--- a/src/ec/google/chromeec/acpi/ec.asl
+++ b/src/ec/google/chromeec/acpi/ec.asl
@@ -52,6 +52,7 @@ Device (EC0)
PATC, 8, // Programmable Auxiliary Trip Commit
CHGL, 8, // Charger Current Limit
TBMD, 1, // Tablet mode
+ DDPN, 3, // Device DPTF Profile Number
// DFUD must be 0 for the other 31 values to be valid
Offset (0x0a),
DFUD, 1, // Device Features Undefined
@@ -509,6 +510,21 @@ Device (EC0)
Return (^TBMD)
}
+ /* Read current Device DPTF Profile Number */
+ Method (RCDP, 0, NotSerialized)
+ {
+ /*
+ * DDPN = 0 is reserved for backwards compatibility.
+ * If DDPN == 0 use TBMD to load appropriate DPTF table.
+ */
+ If (LEqual (^DDPN, 0)) {
+ Return (^TBMD)
+ } Else {
+ Subtract (^DDPN, 1, Local0)
+ Return (Local0)
+ }
+ }
+
#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC_ACPI_USB_PORT_POWER)
/*
* Enable USB Port Power