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| author | Billy Tsai <billy_tsai@aspeedtech.com> | 2024-02-21 18:40:25 +0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2024-03-07 10:50:16 -0800 |
| commit | 7e1449cd15d1096157d1a9923b82e37602fb7eb0 (patch) | |
| tree | 9434aef0a2ba327c35fd73a2135f66fae43567ed /Documentation/hwmon | |
| parent | df9d235c300d143d319ff8373988ef213ec19024 (diff) | |
| download | linux-7e1449cd15d1096157d1a9923b82e37602fb7eb0.tar.gz linux-7e1449cd15d1096157d1a9923b82e37602fb7eb0.tar.bz2 linux-7e1449cd15d1096157d1a9923b82e37602fb7eb0.zip | |
hwmon: (aspeed-g6-pwm-tacho): Support for ASPEED g6 PWM/Fan tach
The driver support two functions: PWM and Tachometer. The PWM feature can
handle up to 16 output ports, while the Tachometer can monitor to up to 16
input ports as well. This driver implements them by exposing two kernel
subsystems: PWM and HWMON. The PWM subsystem can be utilized alongside
existing drivers for controlling elements such as fans (pwm-fan.c),
beepers (pwm-beeper.c) and so on. Through the HWMON subsystem, the driver
provides sysfs interfaces for fan.
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20240221104025.1306227-4-billy_tsai@aspeedtech.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/aspeed-g6-pwm-tach.rst | 26 | ||||
| -rw-r--r-- | Documentation/hwmon/index.rst | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/hwmon/aspeed-g6-pwm-tach.rst b/Documentation/hwmon/aspeed-g6-pwm-tach.rst new file mode 100644 index 000000000000..17398fe397fe --- /dev/null +++ b/Documentation/hwmon/aspeed-g6-pwm-tach.rst @@ -0,0 +1,26 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver aspeed-g6-pwm-tach +================================= + +Supported chips: + ASPEED AST2600 + +Authors: + <billy_tsai@aspeedtech.com> + +Description: +------------ +This driver implements support for ASPEED AST2600 Fan Tacho controller. +The controller supports up to 16 tachometer inputs. + +The driver provides the following sensor accesses in sysfs: + +=============== ======= ====================================================== +fanX_input ro provide current fan rotation value in RPM as reported + by the fan to the device. +fanX_div rw Fan divisor: Supported value are power of 4 (1, 4, 16 + 64, ... 4194304) + The larger divisor, the less rpm accuracy and the less + affected by fan signal glitch. +=============== ======= ====================================================== diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index c4af2a894c42..1ca7a4fe1f8f 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -44,6 +44,7 @@ Hardware Monitoring Kernel Drivers aquacomputer_d5next asb100 asc7621 + aspeed-g6-pwm-tach aspeed-pwm-tacho asus_ec_sensors asus_rog_ryujin |