| .. SPDX-License-Identifier: GPL-2.0 |
| |
| Kernel driver emc2305 |
| ===================== |
| |
| Supported chips: |
| Microchip EMC2305, EMC2303, EMC2302, EMC2301 |
| |
| Addresses scanned: I2C 0x27, 0x2c, 0x2d, 0x2e, 0x2f, 0x4c, 0x4d |
| 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 |
| ================= == ======================================================================== |
