linux-kernel - [PATCH 2/2] hwmon: document: add gpd-fan

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Message-Id: <20240716-gpd_fan-v1-2-34051dd71a06@gmail.com>
Date: Tue, 16 Jul 2024 19:49:54 +0800
From: Cryolitia PukNgae via B4 Relay <devnull+Cryolitia.gmail.com@...nel.org>
To: Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>, 
 Cryolitia PukNgae <Cryolitia@...il.com>, Jonathan Corbet <corbet@....net>
Cc: linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org, 
 linux-doc@...r.kernel.org, Celeste Liu <CoelacanthusHex@...il.com>, 
 Marcin Strągowski <marcin@...agowski.com>
Subject: [PATCH 2/2] hwmon: document: add gpd-fan

From: Cryolitia PukNgae <Cryolitia@...il.com>

Add GPD fan driver document

Signed-off-by: Cryolitia PukNgae <Cryolitia@...il.com>
---
 Documentation/hwmon/gpd-fan.rst | 68 +++++++++++++++++++++++++++++++++++++++++
 Documentation/hwmon/index.rst   |  1 +
 MAINTAINERS                     |  1 +
 3 files changed, 70 insertions(+)

diff --git a/Documentation/hwmon/gpd-fan.rst b/Documentation/hwmon/gpd-fan.rst
new file mode 100644
index 000000000000..0e5bb8b5feed
--- /dev/null
+++ b/Documentation/hwmon/gpd-fan.rst
@@ -0,0 +1,68 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+Kernel driver gpd-fan
+=========================
+
+Authors:
+    - Cryolitia PukNgae <Cryolitia@...il.com>
+
+Description:
+------------
+
+Handheld devices from GPD provide fan readings and fan control through
+their embedded controllers.
+
+Supported devices
+-----------------
+
+Currently the driver supports the following handhelds:
+
+ - GPD Win Mini (7840U)
+ - GPD Win Mini (8840U)
+ - GPD Win Max 2
+ - GPD Win Max 2 2023 (7840U)
+ - GPD Win Max 2 2024 (8840U)
+ - GPD Win 4 (6800U)
+ - GPD Win 4 (7840U)
+
+Module parameters
+-----------------
+
+gpd_fan_model
+  Force specific which module quirk should be use.
+
+   - wm2
+       - GPD Win 4 (7840U)
+       - GPD Win Max 2 (6800U)
+       - GPD Win Max 2 2023 (7840U)
+       - GPD Win Max 2 2024 (8840U)
+   - win4
+       - GPD Win 4 (6800U)
+   - win_mini
+       - GPD Win Mini (7840U)
+       - GPD Win Mini (8840U)
+
+Sysfs entries
+-------------
+
+The following attributes are supported:
+
+fan1_input
+  Read Only. Reads current fan RMP.
+
+pwm1_enable
+  Read Write. Enable manual fan control. Write "0" to disable control and run
+  full speed. Write "1" to set to manual, write "2" to let the EC control decide
+  fan speed. Read this attribute to see current status.
+
+pwm1
+  Read Write. Read this attribute to see current duty cycle in the range [0-255].
+  When pwm1_enable is set to "1" (manual) write any value in the range [0-255]
+  to set fan speed.
+
+pwm1_mode
+  Read Only. Should always be "1" by now to indicate the fan being under PWM mode.
+
+update_interval
+  Read Write. Set the interval in milliseconds to update fan speed. The default
+  and minimum time is 1 second
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index 913c11390a45..97add26f53b7 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -80,6 +80,7 @@ Hardware Monitoring Kernel Drivers
    gigabyte_waterforce
    gsc-hwmon
    gl518sm
+   gpd-fan
    gxp-fan-ctrl
    hih6130
    hp-wmi-sensors
diff --git a/MAINTAINERS b/MAINTAINERS
index 9ced72cec42b..5079b5bfe4b1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9376,6 +9376,7 @@ GPD FAN DRIVER
 M:	Cryolitia PukNgae <Cryolitia@...il.com>
 L:	linux-hwmon@...r.kernel.org
 S:	Maintained
+F:	Documentation/hwmon/gpd-fan.rst
 F:	drivers/hwmon/gpd-fan.c
 
 GPD POCKET FAN DRIVER

-- 
2.45.2