projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / blame
| Commit | Line | Data |
|---|---|---|
| 9c947d25 VV |
1 | Kernel driver nct7904 |
| 2 | ==================== | |
| 3 | ||
| 4 | Supported chip: | |
| 5 | * Nuvoton NCT7904D | |
| 6 | Prefix: nct7904 | |
| 7 | Addresses: I2C 0x2d, 0x2e | |
| 8 | Datasheet: Publicly available at Nuvoton website | |
| 9 | http://www.nuvoton.com/ | |
| 10 | ||
| 11 | Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru> | |
| 12 | ||
| 13 | ||
| 14 | Description | |
| 15 | ----------- | |
| 16 | ||
| 17 | The NCT7904D is a hardware monitor supporting up to 20 voltage sensors, | |
| 18 | internal temperature sensor, Intel PECI and AMD SB-TSI CPU temperature | |
| 19 | interface, up to 12 fan tachometer inputs, up to 4 fan control channels | |
| 20 | with SmartFan. | |
| 21 | ||
| 22 | ||
| 23 | Sysfs entries | |
| 24 | ------------- | |
| 25 | ||
| 26 | Currently, the driver supports only the following features: | |
| 27 | ||
| 28 | in[1-20]_input Input voltage measurements (mV) | |
| 29 | ||
| 30 | fan[1-12]_input Fan tachometer measurements (rpm) | |
| 31 | ||
| 32 | temp1_input Local temperature (1/1000 degree, | |
| 33 | 0.125 degree resolution) | |
| 34 | ||
| 35 | temp[2-9]_input CPU temperatures (1/1000 degree, | |
| 36 | 0.125 degree resolution) | |
| 37 | ||
| 0d6aaffc | 38 | pwm[1-4]_enable R/W, 1/2 for manual or SmartFan mode |
| 9c947d25 VV |
39 | Setting SmartFan mode is supported only if it has been |
| 40 | previously configured by BIOS (or configuration EEPROM) | |
| 41 | ||
| 0d6aaffc | 42 | pwm[1-4] R/O in SmartFan mode, R/W in manual control mode |
| 9c947d25 VV |
43 | |
| 44 | The driver checks sensor control registers and does not export the sensors | |
| 45 | that are not enabled. Anyway, a sensor that is enabled may actually be not | |
| 46 | connected and thus provide zero readings. | |
| 47 | ||
| 48 | ||
| 49 | Limitations | |
| 50 | ----------- | |
| 51 | ||
| 52 | The following features are not supported in current version: | |
| 53 | ||
| 54 | - SmartFan control | |
| 55 | - Watchdog | |
| 56 | - GPIO | |
| 57 | - external temperature sensors | |
| 58 | - SMI | |
| 59 | - min/max values | |
| 60 | - many other... |