1 Kernel driver aspeed-pwm-tacho 1 Kernel driver aspeed-pwm-tacho
2 ============================== 2 ==============================
3 3
4 Supported chips: 4 Supported chips:
5 ASPEED AST2400/2500 5 ASPEED AST2400/2500
6 6
7 Authors: 7 Authors:
8 <jaghu@google.com> 8 <jaghu@google.com>
9 9
10 Description: 10 Description:
11 ------------ 11 ------------
12 This driver implements support for ASPEED AST2 12 This driver implements support for ASPEED AST2400/2500 PWM and Fan Tacho
13 controller. The PWM controller supports up to 13 controller. The PWM controller supports up to 8 PWM outputs. The Fan tacho
14 controller supports up to 16 tachometer inputs 14 controller supports up to 16 tachometer inputs.
15 15
16 The driver provides the following sensor acces 16 The driver provides the following sensor accesses in sysfs:
17 17
18 =============== ======= ====================== 18 =============== ======= =====================================================
19 fanX_input ro provide current fan ro 19 fanX_input ro provide current fan rotation value in RPM as reported
20 by the fan to the devi 20 by the fan to the device.
21 21
22 pwmX rw get or set PWM fan con 22 pwmX rw get or set PWM fan control value. This is an integer
23 value between 0(off) a 23 value between 0(off) and 255(full speed).
24 =============== ======= ====================== 24 =============== ======= =====================================================
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