Re: [PATCH RFC 1/2] dt-bindings: regmap: add common schema for no-sequential-read

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

On Thu, Jul 23, 2026 at 01:01:11PM +0200, Richard Leitner wrote:
> On Wed, Jul 22, 2026 at 11:03:09PM +0100, Mark Brown wrote:
> > On Wed, Jul 22, 2026 at 11:58:46PM +0200, Richard Leitner wrote:
> > 
> > > @Mark: I understood that if the fpga really intercepts the I2C bus, it
> > > should be modelled accordingly in device tree. But what would be the
> > > preferred implementation if both devices sit on the same I2C bus, but
> > > one is messing up some register reads on purpose?
> > 
> > I think we would need to have a coherent understanding and description
> > of the actual issue to know how to describe it.
> 
> Understood. I will try to figure out how the hardware is really wired
> and come back to you.

Based on the information I have received so far, the FPGA is interposed
between the host and sensor. It could therefore be modelled in DT as
child of the I2C bus and a parent of the sensor.

New version of some of the Vision Components modules have fixed the
multi-read bug, so we will still need a property in the FPGA DT node to
indicate if the quirk should be activated.

> > Please do not add random characters to my name.
> 
> Sorry, I didn’t mean any harm.

-- 
Regards,

Laurent Pinchart