Re: [PATCH v2 1/2] dt-bindings: hwmon: Add lltc ltc4286 driver bindings

Guenter Roeck
2023-10-31T14:15:03Z

On 10/30/23 23:25, Delphine_CC_Chiu/WYHQ/Wiwynn wrote:
[ ... ]
>>
>> Actually, turns out there is some contradiction in the LTC4286 datasheet.
>> It mentions different coefficients in different places. It is all but impossible to
>> determine if the datasheet is wrong or if the chip uses a variety of coefficients
>> unless one has a real chip available. Sigh :-(.
> We are not the chip vendor, but we could forward your question to vendor.
> Could you point out the exact places (which pages) where are the contradiction in LTC4286 datasheet?
>

See "PMBUS COMMAND SUMMARY", default values:

"IOUT_OC_WARN_LIMIT" says "21.3 mV/RSENSE"

"PIN_OP_WARN_LIMIT" says "2.8/RSENSE"

This seems to contradict "Table 8. PMBus M, B, and R Parameters". But then,
reading it again (and again), I think it is just an odd and confusing way
of trying to describe the 0x7fff default register values. Sorry for the noise.

Guenter