linux-kernel - Re: [PATCH 2/2] i3c: i3c-hub: Add Renesas RG3MxxB12A1 I3C HUB driver

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Date: Wed, 19 Jun 2024 14:55:35 +0800
From: Jeremy Kerr <jk@...econstruct.com.au>
To: Steven Niu <steven.niu.uj@...esas.com>, alexandre.belloni@...tlin.com, 
 linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org,
 robh+dt@...nel.org,  krzysztof.kozlowski+dt@...aro.org,
 conor+dt@...nel.org,  devicetree@...r.kernel.org
Cc: zbigniew.lukwinski@...ux.intel.com
Subject: Re: [PATCH 2/2] i3c: i3c-hub: Add Renesas RG3MxxB12A1 I3C HUB driver

Hi Steven,

> RG3MxxB12A1 I3C HUB is smart device which provide multiple
> functionality:
> * Enabling voltage compatibility across I3C Controller and Target
> Device.
> * Enabling voltage compatibility across I3C Controller and Target
> devices.
> * Bus capacitance isolation.
> * Address conflict isolation.
> * I3C port expansion.
> * Two controllers in a single I3C bus.
> * I3C and SMBus device compatibility.
> * GPIO expansion.

Do you plan any more work on this driver? It would be great to have
this included upstream, but looks like there's a fairly large amount of
work required to get to that point, particularly in regards to using
existing kernel infrastructure to support the device functions.

Anything I can do to help there? Would a (further) review on this
series be useful?

Cheers,


Jeremy