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authorBenson Leung <bleung@chromium.org>2018-06-05 14:05:29 -0700
committerBenson Leung <bleung@chromium.org>2018-06-16 16:52:59 -0700
commitc474e9f2be9992861d926eea3e5d4fb393cd6e2a (patch)
treed87a3cefeea84cb7afb60f16c34b4e13dc29db1b
parentce397d215ccd07b8ae3f71db689aedb85d56ab40 (diff)
platform/chrome: chromeos_tbmc - fix SPDX identifier
Original submission was GPLv2 only, so mark as GPL-2.0. Also restored some descriptive lines that were there before. Signed-off-by: Benson Leung <bleung@chromium.org>
-rw-r--r--drivers/platform/chrome/chromeos_tbmc.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/platform/chrome/chromeos_tbmc.c b/drivers/platform/chrome/chromeos_tbmc.c
index b935df6a9694..1e81f8144c0d 100644
--- a/drivers/platform/chrome/chromeos_tbmc.c
+++ b/drivers/platform/chrome/chromeos_tbmc.c
@@ -1,8 +1,16 @@
-// SPDX-License-Identifier: GPL-2.0+
+// SPDX-License-Identifier: GPL-2.0
// Driver to detect Tablet Mode for ChromeOS convertible.
//
// Copyright (C) 2017 Google, Inc.
// Author: Gwendal Grignou <gwendal@chromium.org>
+//
+// On Chromebook using ACPI, this device listens for notification
+// from GOOG0006 and issue method TBMC to retrieve the status.
+//
+// GOOG0006 issues the notification when it receives EC_HOST_EVENT_MODE_CHANGE
+// from the EC.
+// Method TBMC reads EC_ACPI_MEM_DEVICE_ORIENTATION byte from the shared
+// memory region.
#include <linux/acpi.h>
#include <linux/input.h>