MIRRORS/linux-yocto
1
0
Fork 0
mirror of git://git.yoctoproject.org/linux-yocto.git synced 2025-07-15 18:20:05 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity
c5943b9c53
linux-yocto/Documentation/hwmon/aspeed-pwm-tacho
Jaghathiswari Rankappagounder Natarajan 2d7a548a3e drivers: hwmon: Support for ASPEED PWM/Fan tach 
The ASPEED AST2400/2500 PWM controller supports 8 PWM output ports.
The ASPEED AST2400/2500 Fan tach controller supports 16 tachometer
inputs.
The device driver matches on the device tree node. The configuration
values are read from the device tree and written to the respective
registers.
The driver provides a sysfs entries through which the user can
configure the duty-cycle value (ranging from 0 to 100 percent) and read
the fan tach rpm value.

Signed-off-by: Jaghathiswari Rankappagounder Natarajan <jaghu@google.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-04-10 13:12:18 -07:00

620 B
Raw Blame History

Kernel driver aspeed-pwm-tacho

Supported chips: ASPEED AST2400/2500

Authors: jaghu@google.com

Description:

This driver implements support for ASPEED AST2400/2500 PWM and Fan Tacho controller. The PWM controller supports upto 8 PWM outputs. The Fan tacho 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.

pwmX rw get or set PWM fan control value. This is an integer value between 0(off) and 255(full speed).