Re: [PATCH] dt-bindings: clock: ti: Convert interface.txt to json-schema

Tony Lindgren
2023-11-28T10:43:37Z

* Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> [231128 08:41]:
> On 28/11/2023 09:32, Andreas Kemnade wrote:
> > On Tue, 28 Nov 2023 09:00:16 +0100
> > Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote:
> >
> >>> +required:
> >>> + - compatible
> >>> + - clocks
> >>> + - '#clock-cells'
> >>
> >> reg is required. Device cannot take "reg" from parent, DTS does not work
> >> like this.
> >
> > Well, apparently they do... and I am just dealing with status quo and not
> > how it should be.
> > Look at commit 31fc1c63c2ae4a542e3c7ac572a10a59ece45c24
>
> Who designed clock-controller binding with a device node per each clock?
> This is ridiculous (although of course not your fault here)! Looking at
> omap3xxx-clocks.dtsi - all its children should be just defined by the
> driver, not by DTSI.

Earlier all the clocks were separate nodes, the ti,clksel binding made
things a bit better by grouping the seprate clock nodes so we don't have
multiple nodes with the same reg.. But yeah clksel instance clocks should
be clock@6 with reg = <6> if the clock bits are at bit 6. That would be
fairly easy to do if that helps, but in general I doubt anybody's going
to spend much effort to fix the omap3 legacy clocks atthis point.

For omap4 and later, things are a bit better as they use the clkctrl clocks:

Documentation/devicetree/bindings/clock/ti-clkctrl.txt

I don't think omap3 has any clkctrl clocks but if it does then that could
be used.

Regards,

Tony