| .. SPDX-License-Identifier: GPL-2.0 |
| |
| Kernel driver gsc-hwmon |
| ======================= |
| |
| Supported chips: Gateworks GSC |
| Datasheet: http://trac.gateworks.com/wiki/gsc |
| Author: Tim Harvey <tharvey@gateworks.com> |
| |
| Description: |
| ------------ |
| |
| This driver supports hardware monitoring for the temperature sensor, |
| various ADC's connected to the GSC, and optional FAN controller available |
| on some boards. |
| |
| |
| Voltage Monitoring |
| ------------------ |
| |
| The voltage inputs are scaled either internally or by the driver depending |
| on the GSC version and firmware. The values returned by the driver do not need |
| further scaling. The voltage input labels provide the voltage rail name: |
| |
| inX_input Measured voltage (mV). |
| inX_label Name of voltage rail. |
| |
| |
| Temperature Monitoring |
| ---------------------- |
| |
| Temperatures are measured with 12-bit or 10-bit resolution and are scaled |
| either internally or by the driver depending on the GSC version and firmware. |
| The values returned by the driver reflect millidegree Celcius: |
| |
| tempX_input Measured temperature. |
| tempX_label Name of temperature input. |
| |
| |
| PWM Output Control |
| ------------------ |
| |
| The GSC features 1 PWM output that operates in automatic mode where the |
| PWM value will be scalled depending on 6 temperature boundaries. |
| The tempeature boundaries are read-write and in millidegree Celcius and the |
| read-only PWM values range from 0 (off) to 255 (full speed). |
| Fan speed will be set to minimum (off) when the temperature sensor reads |
| less than pwm1_auto_point1_temp and maximum when the temperature sensor |
| equals or exceeds pwm1_auto_point6_temp. |
| |
| pwm1_auto_point[1-6]_pwm PWM value. |
| pwm1_auto_point[1-6]_temp Temperature boundary. |
| |
