Re: [PATCH] media: dt-bindings: Merge OV5695 into OV5693 binding

Sakari Ailus
2023-07-31T11:21:50Z

Hi Rob,

On Fri, Jul 07, 2023 at 03:06:04PM -0600, Rob Herring wrote:
> The OV5695 binding is almost the same as the OV5693 binding. The only
> difference is 'clock-names' is defined for OV5695. However, the lack of
> clock-names is an omission as the Linux OV5693 driver expects the same
> 'xvclk' clock name.
>
> 'link-frequencies' is required by OV5693, but not OV5695. Just drop it
> from being required. Expressing it conditionally would be ugly. It
> shouldn't really be required either as the driver only supports 1
> frequency anyways.

The correct way to address this would appear to be to add link-frequencies
for both of these devices. I think I've seen one or two sensors of this
class (raw, CSI-2/parallel, external clock etc.) with link frequencies
documented as "fixed" --- which is probably a documentation issue more than
anything else.

Also see:
<URL:https://hverkuil.home.xs4all.nl/spec/driver-api/camera-sensor.html#handling-clocks>.

--
Kind regards,

Sakari Ailus