linux-kernel - Re: [PATCH 2/3] i2c: rcar: introduce Gen4 devices

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Message-ID: <ZPjfT3H42+5id0i+@shikoro>
Date:   Wed, 6 Sep 2023 22:21:35 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-renesas-soc@...r.kernel.org,
        Andi Shyti <andi.shyti@...nel.org>,
        Magnus Damm <magnus.damm@...il.com>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] i2c: rcar: introduce Gen4 devices


> I was reluctant to add the reset too often because my measurements back
> then showed that it costs around 5us every time. Annoying. Maybe I
> should take it easy and follow the documentation. But then I am still
> not sure if a large transfer with way more than two messages are OK
> without reset? I will ask the HW team.

Stupid me, we are following the documentation. Except that we treat the
reset property as optional while it should be mandatory for >= Gen3.


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