1Kernel driver aspeed-pwm-tacho 2============================== 3 4Supported chips: 5 ASPEED AST2400/2500 6 7Authors: 8 <jaghu@google.com> 9 10Description: 11------------ 12This driver implements support for ASPEED AST2400/2500 PWM and Fan Tacho 13controller. The PWM controller supports upto 8 PWM outputs. The Fan tacho 14controller supports up to 16 tachometer inputs. 15 16The driver provides the following sensor accesses in sysfs: 17 18=============== ======= ===================================================== 19fanX_input ro provide current fan rotation value in RPM as reported 20 by the fan to the device. 21 22pwmX rw get or set PWM fan control value. This is an integer 23 value between 0(off) and 255(full speed). 24=============== ======= ===================================================== 25