linux-kernel - Re: [PATCH 3/3] i2c: rcar: add FastMode+ support

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Message-ID: <ZPh5m2PUMlmhtOyQ@shikoro>
Date:   Wed, 6 Sep 2023 15:07:39 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-renesas-soc@...r.kernel.org,
        Andi Shyti <andi.shyti@...nel.org>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] i2c: rcar: add FastMode+ support


> OK do you need rounding for the division of ick and t.bus_freq_hz,
> or is the adjustment bij "- (round + 8)" already taking care of that?

Unless I overlooked something, it is the latter. The new formula
produces the same values for 100 and 400kHz as the old one.

> I guess I just don't understand the intended formula here...

Ok, needs more documentation then.


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