| .. SPDX-License-Identifier: GPL-2.0 | |
| Kernel driver emc2305 | |
| ===================== | |
| Supported chips: | |
| Microchip EMC2305, EMC2303, EMC2302, EMC2301 | |
| Prefixes: 'emc2305' | |
| Datasheet: Publicly available at the Microchip website : | |
| https://www.microchip.com/en-us/product/EMC2305 | |
| Description: | |
| ------------ | |
| This driver implements support for Microchip EMC2301/2/3/5 RPM-based PWM Fan Controller. | |
| The EMC2305 Fan Controller supports up to 5 independently controlled PWM fan drives. | |
| Fan rotation speeds are reported in RPM. | |
| The driver supports the RPM-based PWM control to keep a fan at the desired speed. | |
| The driver provides the possibility to have one common PWM interface for all FANs | |
| or up to the maximum available or configured independent PWMs. | |
| The driver provides the following sysfs interfaces in hwmon subsystem: | |
| ================= == =================================================== | |
| fan[1-5]_fault RO files for tachometers TACH1-TACH5 fault indication | |
| fan[1-5]_input RO files for tachometers TACH1-TACH5 input (in RPM) | |
| pwm[1-5] RW file for fan[1-5] target duty cycle (0..255) | |
| ================= == =================================================== | |
| sysfs interfaces in thermal subsystem: | |
| ================= == ======================================================================== | |
| cur_state RW file for the current cooling state of the cooling device (0..max_state) | |
| max_state RO file for the maximum cooling state of the cooling device | |
| ================= == ======================================================================== |