Re: [PATCH 01/10] dt: bindings: clock: add mtmips SoCs clock device tree binding documentation

From: Arınç ÜNAL
Date: Fri Mar 24 2023 - 19:16:08 EST


On 25.03.2023 01:10, Rob Herring wrote:
On Tue, Mar 21, 2023 at 12:02:47PM +0300, Arınç ÜNAL wrote:
On 21.03.2023 12:01, Krzysztof Kozlowski wrote:
On 21/03/2023 09:53, Arınç ÜNAL wrote:

I do not see how choosing one variant for compatibles having two
variants of prefixes, complicates things. Following this argument
choosing "ralink" also complicates!

The idea is to make every compatible string of MTMIPS to have the ralink
prefix so it's not mediatek on some schemas and ralink on others. Simpler.

Which is an ABI break, so you cannot do it.

No, both strings stay on the driver, it's the schemas that will only keep
ralink.

But you are adding one of the strings to the driver, right? Still an ABI
break, but only if you have an old kernel and new DT. That can be
somewhat mitigated with a stable backport of the new id, but still an
ABI break.

Ah, that makes sense. Yes, I'd be adding new strings to the driver.

Whatever is in the driver should be in the schema too. 'make dt_compatible_check' will check this. And some day, I'd like that list to get to 0.

I'll keep this in mind for the schemas I maintain. I will add ralink,rt2880-pinmux as deprecated on the pinctrl schemas so it would disappear from 'make dt_compatible check'. I believe I'm supposed to do it like this?

properties:
compatible:
enum:
- ralink,rt2880-pinctrl
- ralink,rt2880-pinmux
deprecated:
items:
- const: ralink,rt2880-pinmux
deprecated: true

Arınç