ec/purism/librem-ec: Add support for Purism Librem EC

Initial commit is a clone of ec/system76/ec with string changes;
Purism-specific functionality will be added in subsequent commits.

Change-Id: I8c51724e6dbfe1bc09496537f9e031643f95c755
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52390
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/ec/purism/librem-ec/acpi/ac.asl b/src/ec/purism/librem-ec/acpi/ac.asl
new file mode 100644
index 0000000000..7326676198
--- /dev/null
+++ b/src/ec/purism/librem-ec/acpi/ac.asl
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (AC)
+{
+	Name (_HID, "ACPI0003" /* Power Source Device */)  // _HID: Hardware ID
+	Name (_PCL, Package (0x01)  // _PCL: Power Consumer List
+	{
+		_SB
+	})
+
+	Name (ACFG, One)
+
+	Method (_PSR, 0, NotSerialized)  // _PSR: Power Source
+	{
+		Return (ACFG)
+	}
+
+	Method (_STA, 0, NotSerialized)  // _STA: Status
+	{
+		Return (0x0F)
+	}
+}