Re: dts: fun with chip names Re: [PATCH v3 1/2] dt: bindings: lm3692x: Add bindings for lm3692x LED driver

From: Rob Herring
Date: Thu Nov 16 2017 - 15:36:37 EST

On Thu, Nov 16, 2017 at 2:11 PM, Pavel Machek <pavel@xxxxxx> wrote:
> Hi!
>> >> +Required properties:
>> >> + - compatible:
>> >> + "ti,lm3692x"
>> >
>> > Don't use wildcards in compatible strings.
>> Do you mean to remove the x? How do we denote a family of parts
>> then?
> I guess you should specify the exact chip.
> Which will present interesting problem for me on Nokia N9/N950; in one
> case, compatible chip is produced by two companies, and it looks like
> some machines have one and some have the other; but we'd like to share
> the dts as user has no chance telling them apart (and it is not
> important, anyway).
> In second case, chip is refered as APDS990X and I don't know where to
> get more exact data.

There's always exceptions to rules. Just make the case for it. IIRC,
there was the same case for the BT chip.