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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-21 22:33:33 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-21 22:33:33 +0200
commit40fafdcbcd7a74e80ab0229b35bf6e497831e28f (patch)
tree40e9c8ee93cb52d1cee3f8168099b92937633745 /drivers/platform/chrome
parentMerge tag 'microblaze-v4.19-rc1' of git://git.monstr.eu/linux-2.6-microblaze (diff)
parentMerge tag 'ib-platform-chrome-mfd-move-cros-ec-transport-for-4.19' into worki... (diff)
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Merge tag 'chrome-platform-for-linus-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform
Pull chrome platform updates from Benson Leung. Everything but the SPDX identifier updates actually came in earlier through the MFD merge. * tag 'chrome-platform-for-linus-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform: platform/chrome: chromeos_tbmc - fix SPDX identifier
Diffstat (limited to 'drivers/platform/chrome')
-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>