1.. SPDX-License-Identifier: GPL-2.0-or-later 2 3Kernel driver aspeed-g6-pwm-tach 4================================= 5 6Supported chips: 7 ASPEED AST2600 8 9Authors: 10 <billy_tsai@aspeedtech.com> 11 12Description: 13------------ 14This driver implements support for ASPEED AST2600 Fan Tacho controller. 15The controller supports up to 16 tachometer inputs. 16 17The driver provides the following sensor accesses in sysfs: 18 19=============== ======= ====================================================== 20fanX_input ro provide current fan rotation value in RPM as reported 21 by the fan to the device. 22fanX_div rw Fan divisor: Supported value are power of 4 (1, 4, 16 23 64, ... 4194304) 24 The larger divisor, the less rpm accuracy and the less 25 affected by fan signal glitch. 26=============== ======= ====================================================== 27