On 12/03/2017 05:24 AM, Linus Walleij wrote:
Hi folks,
This system:
https://dflund.se/~triad/krad/dlink-dns-313/
Has:
- 1 GPIO fan using drivers/hwmon/gpio-fan.c
- 1 temperature sensor using drivers/hwmon/lm75.c
So it is the simplest form of chassis cooling.
Is it possible to use drivers/thermal to set up a policy
for controlling the HWMON fan directly by reading the
HWMON sensor input periodically?
Both register with the thermal subsystem, so I would think
it should be possible, at least for devicetree enabled systems
(the hwmon subsystem uses a devm function to register
sensors with the thermal subsystem, and the only available
devm function is devm_thermal_zone_of_sensor_register).
Guenter
If not: should it be? It seems natural to me.
I guess this stuff is normally "policy in userspace"
but we already have thermal policies in the kernel,
so...
Yours,
Linus Walleij
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