Merge branch 'mlxsw-Thermal-and-hwmon-extensions'

Ido Schimmel says:

====================
mlxsw: Thermal and hwmon extensions

This patchset from Vadim includes various enhancements to thermal and
hwmon code in mlxsw.

Patch #1 adds a thermal zone for each inter-connect device (gearbox).
These devices are present in SN3800 systems and code to expose their
temperature via hwmon was added in commit 2e265a8b6c09 ("mlxsw: core:
Extend hwmon interface with inter-connect temperature attributes").

Currently, there are multiple thermal zones in mlxsw and only a few
cooling devices. Patch #2 detects the hottest thermal zone and the
cooling devices are switched to follow its trends. RFC was sent last
month [1].

Patch #3 allows to read and report negative temperature of the sensors
mlxsw exposes via hwmon and thermal subsystems.

v2 (Andrew Lunn):
* In patch #3, replace '%u' with '%d' in mlxsw_hwmon_module_temp_show()

[1] https://patchwork.ozlabs.org/patch/1107161/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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