linux-kernel - [PATCH v5 04/13] ABI: testing: add tt_toggle and tt

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Message-ID: <20250317155349.1236188-5-lkml@antheas.dev>
Date: Mon, 17 Mar 2025 16:53:40 +0100
From: Antheas Kapenekakis <lkml@...heas.dev>
To: platform-driver-x86@...r.kernel.org
Cc: linux-hwmon@...r.kernel.org,
	linux-doc@...r.kernel.org,
	linux-pm@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>,
	Jean Delvare <jdelvare@...e.com>,
	Jonathan Corbet <corbet@....net>,
	Joaquin Ignacio Aramendia <samsagax@...il.com>,
	Derek J Clark <derekjohn.clark@...il.com>,
	Kevin Greenberg <kdgreenberg234@...tonmail.com>,
	Joshua Tam <csinaction@...me>,
	Parth Menon <parthasarathymenon@...il.com>,
	Eileen <eileen@...-netbook.com>,
	linux-kernel@...r.kernel.org,
	sre@...nel.org,
	linux@...ssschuh.net,
	Antheas Kapenekakis <lkml@...heas.dev>
Subject: [PATCH v5 04/13] ABI: testing: add tt_toggle and tt_led entries

When tt_toggle was introduced, it was not added to the platform sysfs.
Add it, then add documentation for tt_led.

Signed-off-by: Antheas Kapenekakis <lkml@...heas.dev>
---
 Documentation/ABI/testing/sysfs-platform-oxp | 26 ++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-platform-oxp

diff --git a/Documentation/ABI/testing/sysfs-platform-oxp b/Documentation/ABI/testing/sysfs-platform-oxp
new file mode 100644
index 0000000000000..776b7dee3d595
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-platform-oxp
@@ -0,0 +1,26 @@
+What:		/sys/devices/platform/<platform>/tt_toggle
+Date:		Jun 2023
+KernelVersion:	6.5
+Contact:	"Antheas Kapenekakis" <lkml@...heas.dev>
+Description:
+		Takeover TDP controls from the device. OneXPlayer devices have a
+		turbo button that can be used to switch between two TDP modes
+		(usually 15W and 25W). By setting this attribute to 1, this
+		functionality is disabled, handing TDP control over to (Windows)
+		userspace software and the Turbo button turns into a keyboard
+		shortcut over the AT keyboard of the device. In addition,
+		using this setting is a prerequisite for PWM control for most
+		newer models (otherwise it NOOPs).
+
+What:		/sys/devices/platform/<platform>/tt_led
+Date:		Feb 2025
+KernelVersion:	6.15
+Contact:	"Antheas Kapenekakis" <lkml@...heas.dev>
+Description:
+		Some OneXPlayer devices (e.g., X1 series) feature a little LED
+		nested in the Turbo button. This LED is illuminated when the
+		device is in the higher TDP mode (e.g., 25W). Once tt_toggle
+		is engaged, this LED is left dangling to its last state. This
+		attribute allows userspace to control the LED state manually
+		(either with 1 or 0). Only a subset of devices contain this LED.
+
-- 
2.48.1