[smartmontools-support] [PATCH] RFC: libata: Add hwmon support for SMART temperature sensors

[David Niklas]

On Fri, 10 Aug 2018 09:13:17 +0200
Linus Walleij <linus.walleij at linaro.org> wrote:
> S.M.A.R.T. temperature sensors have been supported for
> years by userspace tools such as smarttools.
> 
> The temperature readout is however also a good fit for
> Linux' hwmon subsystem. By adding a hwmon interface to dig
> out SMART parameter 194, we can expose the drive temperature
> as a standard hwmon sensor.
> 
> The idea came about when experimenting with NAS enclosures
> that lack their own on-board sensors but instead piggy-back
> the sensor found in the harddrive, if any, to decide on a
> policy for driving the on-board fan.

I have followed this thread and like your idea. I would be an early
adopter.
The initial drive temp reporting is also a good idea IMHO. The user would
not be able to ask for the temp while the system is booting, without
adding an init script. Of course, the same is true of the CPU and GPU, but
they have their own dedicated fans that can be visually inspected.

Thank you, and keep up your work!