[PATCH v2 1/2] dt-bindings: pwm: Allow decimal format in addition to hex format

[Tony Lindgren]

* Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org> [221122 07:26]:
> On 22/11/2022 05:43, Tony Lindgren wrote:
> > * Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org> [221121 16:05]:
> >> On 21/11/2022 15:48, Tony Lindgren wrote:
> >>> * Uwe Kleine-König <u.kleine-koenig at pengutronix.de> [221121 14:30]:
> >>>> On Mon, Nov 21, 2022 at 01:55:24PM +0200, Tony Lindgren wrote:
> >>>>> Let's allow node numbering in decimal format too.
> >>>>>
> >>>>> Simple human-readable increments/IDs are usually decimal, hex is only for
> >>>>> addresses as noted by Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>.
> >>>>>
> >>>>> Cc: Thierry Reding <thierry.reding at gmail.com>
> >>>>> Cc: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
> >>>>> Suggested-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
> >>>>> Signed-off-by: Tony Lindgren <tony at atomide.com>
> >>>>> ---
> >>>>>  Documentation/devicetree/bindings/pwm/pwm.yaml | 2 +-
> >>>>>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>>>>
> >>>>> diff --git a/Documentation/devicetree/bindings/pwm/pwm.yaml b/Documentation/devicetree/bindings/pwm/pwm.yaml
> >>>>> --- a/Documentation/devicetree/bindings/pwm/pwm.yaml
> >>>>> +++ b/Documentation/devicetree/bindings/pwm/pwm.yaml
> >>>>> @@ -13,7 +13,7 @@ select: false
> >>>>>  
> >>>>>  properties:
> >>>>>    $nodename:
> >>>>> -    pattern: "^pwm(@.*|-[0-9a-f])*$"
> >>>>> +    pattern: "^pwm(@.*|-([0-9a-f]|1[0-5]))*$"
> >>>>
> >>>> I wonder why you don't make this:
> >>>>
> >>>> +    pattern: "^pwm(@.*|-[0-9a-f]*)$"
> >>
> >> Yes, the '*' should be within ().
> > 
> > Sorry I guess I don't follow. So for what type of naming is the second '*'
> > actually needed here, or is it needed at all?
> > 
> > We only want to match the following:
> > 
> > pwm at 1234
> > 
> > pwm-0
> > ...
> > pwm-f
> > 
> > And now also:
> > 
> > pwm-0
> > ...
> > pwm-15
> > 
> > Is there yet another format I'm missing?
> > 
> >>> Hmm but I think this would also pass for node names like pwm-a-foo?
> >>>
> >>
> >> No, how?
> > 
> > Because of the second extra '*' there :)
> 
> It cannot multiple dashes...

Sorry I'm still confused.. Care to specify what match do you want to
use here and why?

Regards,

Tony