Re: [PATCH v2 3/6] dt-bindings: hwmon: Add Sensylink CTF2301

> On Tue, Jul 21, 2026 at 02:48:29AM -0700, Troy Mitchell wrote:
>> Add the Sensylink CTF2301 temperature sensor and fan controller to the
>> LM63 family binding. The chip follows the LM63 register model and can
>> provide a thermal cooling device when #cooling-cells is present.
>
> Commit message should explain why a fallback compatible is not suitable.

The CTF2301 shares the overall register layout with LM63, but it is
not fully compatible. In particular, it uses different conversion-rate
encodings, extended local-temperature registers, additional fan lookup
table entries, and device-specific PWM and ALERT/TACH configuration. An
older driver matching the "national,lm63" fallback would therefore not
operate the device correctly.

I will explain why a fallback compatible is not suitable in the commit
message in the next version.

                                            - Troy