linux-kernel - [PATCH v3 2/3] x86/platform/dell-privacy-wmi: add document for dell privacy driver

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Date:   Wed, 13 Jan 2021 01:17:55 +0800
From:   Perry Yuan <Perry.Yuan@...l.com>
To:     oder_chiou@...ltek.com, perex@...ex.cz, tiwai@...e.com,
        hdegoede@...hat.com, mgross@...ux.intel.com
Cc:     lgirdwood@...il.com, broonie@...nel.org,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, Perry.Yuan@...l.com,
        Mario.Limonciello@...l.com
Subject: [PATCH v3 2/3] x86/platform/dell-privacy-wmi: add document for dell privacy driver

From: Perry Yuan <perry_yuan@...l.com>

Describe the Dell Privacy feature capabilities and devices
state class exposed by BIOS

Signed-off-by: Perry Yuan <perry_yuan@...l.com>
---
 .../testing/sysfs-platform-dell-privacy-wmi   | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi

diff --git a/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi b/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi
new file mode 100644
index 000000000000..3dbc2d25b60e
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi
@@ -0,0 +1,31 @@
+What:		/sys/bus/wmi/devices/6932965F-1671-4CEB-B988-D3AB0A901919/devices_supported
+Date:		Jan 2021
+KernelVersion:	5.11
+Contact:	"perry_yuan@...l.com>"
+Description:
+		Display which dell hardware level privacy devices are supported
+		“Dell Privacy” is a set of HW, FW, and SW features to enhance
+		Dell’s commitment to platform privacy for MIC, Camera, and
+		ePrivacy screens.
+		The supported privacy haredware privacy devices are:
+		 * 0x0 - None,
+		 * 0x1 - Microphone,
+		 * 0x2 - Camera,
+		 * 0x4 - ePrivacy Screen
+
+What:		/sys/bus/wmi/devices/6932965F-1671-4CEB-B988-D3AB0A901919/current_state
+Date:		Jan 2021
+KernelVersion:	5.11
+Contact:	"perry_yuan@...l.com>"
+Description:
+		Allow user space to check current dell privacy device state.
+		Describes the Device State class exposed by BIOS which can be
+		consumed by various applications interested in knowing the Privacy
+		feature capabilities
+		There are three Bits for available states:
+		    * 0 -> Off
+		    * 1 -> On
+		    * Bit0 -> Microphone
+		    * Bit1 -> Camera
+		    * Bit2 -> ePrivacyScreen
+
-- 
2.25.1