1 .. SPDX-License-Identifier: GPL-2.0-or-later 1 .. SPDX-License-Identifier: GPL-2.0-or-later
2 2
3 Kernel driver aspeed-g6-pwm-tach 3 Kernel driver aspeed-g6-pwm-tach
4 ================================= 4 =================================
5 5
6 Supported chips: 6 Supported chips:
7 ASPEED AST2600 7 ASPEED AST2600
8 8
9 Authors: 9 Authors:
10 <billy_tsai@aspeedtech.com> 10 <billy_tsai@aspeedtech.com>
11 11
12 Description: 12 Description:
13 ------------ 13 ------------
14 This driver implements support for ASPEED AST2 14 This driver implements support for ASPEED AST2600 Fan Tacho controller.
15 The controller supports up to 16 tachometer in 15 The controller supports up to 16 tachometer inputs.
16 16
17 The driver provides the following sensor acces 17 The driver provides the following sensor accesses in sysfs:
18 18
19 =============== ======= ====================== 19 =============== ======= ======================================================
20 fanX_input ro provide current fan ro 20 fanX_input ro provide current fan rotation value in RPM as reported
21 by the fan to the devi 21 by the fan to the device.
22 fanX_div rw Fan divisor: Supported 22 fanX_div rw Fan divisor: Supported value are power of 4 (1, 4, 16
23 64, ... 4194304) 23 64, ... 4194304)
24 The larger divisor, th 24 The larger divisor, the less rpm accuracy and the less
25 affected by fan signal 25 affected by fan signal glitch.
26 =============== ======= ====================== 26 =============== ======= ======================================================
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