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hwmon: Add Gateworks System Controller support
The Gateworks System Controller has a hwmon sub-component that exposes up to 16 ADC's, some of which are temperature sensors, others which are voltage inputs. The ADC configuration (register mapping and name) is configured via device-tree and varies board to board. Signed-off-by: Tim Harvey <tharvey@gateworks.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Lee Jones <lee.jones@linaro.org>
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.. SPDX-License-Identifier: GPL-2.0 | ||
Kernel driver gsc-hwmon | ||
======================= | ||
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Supported chips: Gateworks GSC | ||
Datasheet: http://trac.gateworks.com/wiki/gsc | ||
Author: Tim Harvey <tharvey@gateworks.com> | ||
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Description: | ||
------------ | ||
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This driver supports hardware monitoring for the temperature sensor, | ||
various ADC's connected to the GSC, and optional FAN controller available | ||
on some boards. | ||
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Voltage Monitoring | ||
------------------ | ||
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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: | ||
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inX_input Measured voltage (mV). | ||
inX_label Name of voltage rail. | ||
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Temperature Monitoring | ||
---------------------- | ||
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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: | ||
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tempX_input Measured temperature. | ||
tempX_label Name of temperature input. | ||
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PWM Output Control | ||
------------------ | ||
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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. | ||
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pwm1_auto_point[1-6]_pwm PWM value. | ||
pwm1_auto_point[1-6]_temp Temperature boundary. | ||
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@@ -60,6 +60,7 @@ Hardware Monitoring Kernel Drivers | |
ftsteutates | ||
g760a | ||
g762 | ||
gsc-hwmon | ||
gl518sm | ||
hih6130 | ||
ibmaem | ||
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