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authorJoaquín Ignacio Aramendía <samsagax@gmail.com>2022-11-04 17:07:00 +0300
committerGuenter Roeck <linux@roeck-us.net>2022-12-05 03:45:02 +0300
commited264e8a7d18c5fec2587ed750c87b75d5348210 (patch)
tree9b7ac6bcac868b9ce2dbb68355fc062068f0efd4 /Documentation/hwmon
parentd5d896b838222fcd037c91c9e0e8f6ab719db05f (diff)
downloadlinux-ed264e8a7d18c5fec2587ed750c87b75d5348210.tar.xz
hwmon: add OneXPlayer mini AMD sensors driver
Sensors driver for OXP Handhelds from One-Netbook that expose fan reading and control via hwmon sysfs. As far as I could gather all OXP boards have the same DMI strings and they can be told appart only by the boot cpu vendor (Intel/AMD). Currently only AMD boards are supported since Intel have different EC registers and values to read/write. Fan control is provided via pwm interface in the range [0-255]. AMD boards have [0-100] as range in the EC, the written value is scaled to accommodate for that. Signed-off-by: Joaquín Ignacio Aramendía <samsagax@gmail.com> Link: https://lore.kernel.org/r/20221104140659.593608-1-samsagax@gmail.com [groeck: Removed misleading comment about module_platform_driver()] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
-rw-r--r--Documentation/hwmon/index.rst1
-rw-r--r--Documentation/hwmon/oxp-sensors.rst34
2 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index ddff3c5713d7..fe2cc6b73634 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -160,6 +160,7 @@ Hardware Monitoring Kernel Drivers
nzxt-kraken2
nzxt-smart2
occ
+ oxp-sensors
pc87360
pc87427
pcf8591
diff --git a/Documentation/hwmon/oxp-sensors.rst b/Documentation/hwmon/oxp-sensors.rst
new file mode 100644
index 000000000000..f612dddc964a
--- /dev/null
+++ b/Documentation/hwmon/oxp-sensors.rst
@@ -0,0 +1,34 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+Kernel driver oxp-sensors
+=========================
+
+Author:
+ - Joaquín Ignacio Aramendía <samsagax@gmail.com>
+
+Description:
+------------
+
+One X Player devices from One Netbook provide fan readings and fan control
+through its Embedded Controller.
+
+Currently only supports AMD boards from the One X Player lineup. Intel boards
+could be supported if we could figure out the EC registers and values to write
+to since the EC layout and model is different.
+
+Sysfs entries
+-------------
+
+The following attributes are supported:
+
+fan1_input
+ Read Only. Reads current fan RMP.
+
+pwm1_enable
+ Read Write. Enable manual fan control. Write "1" to set to manual, write "0"
+ to let the EC control de 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.