Re: [PATCH 0/4] hwmon: (adt7470) Add thermal framework support

[Guenter Roeck <linux@roeck-us.net>]

On 7/16/26 14:21, Luiz Angelo Daros de Luca wrote:
> The ADT7470 is a temperature monitor and PWM fan controller capable of
> monitoring up to 10 external temperature sensors and controlling up to 4
> PWM outputs.
> 
> Currently, the driver exposes these sensors and PWM controls solely via
> the standard hwmon sysfs interface. This patch series integrates the
> ADT7470 driver with the kernel's thermal subsystem, allowing its
> temperature sensors to be referenced by Device Tree thermal zones.
> 
> To avoid saturating the I2C bus during frequent polling by the thermal
> core, the thermal callbacks are designed to read from the driver's
> internal cache.
> 
> Patch 1 adds the YAML device tree binding documentation, defining
> the necessary #cooling-cells and #thermal-sensor-cells properties.
> Patch 2 performs a minor refactoring to introduce the ADT7470_PWM_MAX
> macro, replacing hardcoded values.
> Patch 3 registers the 4 PWM channels as optional thermal cooling
> devices.
> Patch 4 registers the external temperature sensors as optional thermal
> zones.
> 
> Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>

This chip is 20+ years old, and it is very unlikely that it is used
in current designs. Please provide evidence that this code is actually
needed and not just a coding exercise.

Thanks,
Guenter