projects / mirror_ubuntu-kernels.git / blame
| Commit | Line | Data |
|---|---|---|
| 005cc9b4 MS |
1 | .. SPDX-License-Identifier: GPL-2.0 |
| 2 | ||
| 3 | Kernel driver emc2305 | |
| 4 | ===================== | |
| 5 | ||
| 6 | Supported chips: | |
| 7 | Microchip EMC2305, EMC2303, EMC2302, EMC2301 | |
| 8 | ||
| 9 | Addresses scanned: I2C 0x27, 0x2c, 0x2d, 0x2e, 0x2f, 0x4c, 0x4d | |
| 10 | Prefixes: 'emc2305' | |
| 11 | ||
| 12 | Datasheet: Publicly available at the Microchip website : | |
| 13 | https://www.microchip.com/en-us/product/EMC2305 | |
| 14 | ||
| 15 | Description: | |
| 16 | ------------ | |
| 17 | This driver implements support for Microchip EMC2301/2/3/5 RPM-based PWM Fan Controller. | |
| 18 | The EMC2305 Fan Controller supports up to 5 independently controlled PWM fan drives. | |
| 19 | Fan rotation speeds are reported in RPM. | |
| 20 | The driver supports the RPM-based PWM control to keep a fan at the desired speed. | |
| 21 | The driver provides the possibility to have one common PWM interface for all FANs | |
| 22 | or up to the maximum available or configured independent PWMs. | |
| 23 | ||
| 24 | The driver provides the following sysfs interfaces in hwmon subsystem: | |
| 25 | ||
| 26 | ================= == =================================================== | |
| 27 | fan[1-5]_fault RO files for tachometers TACH1-TACH5 fault indication | |
| 28 | fan[1-5]_input RO files for tachometers TACH1-TACH5 input (in RPM) | |
| 29 | pwm[1-5] RW file for fan[1-5] target duty cycle (0..255) | |
| 30 | ================= == =================================================== | |
| 31 | ||
| 32 | sysfs interfaces in thermal subsystem: | |
| 33 | ||
| 34 | ================= == ======================================================================== | |
| 35 | cur_state RW file for the current cooling state of the cooling device (0..max_state) | |
| 36 | max_state RO file for the maximum cooling state of the cooling device | |
| 37 | ================= == ======================================================================== |