From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Adam Ford <aford173@gmail.com>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>
Subject: Re: [PATCH] arm64: dts: renesas: beacon: Fix i2c2 speed calcuation
Date: Tue, 14 Sep 2021 12:41:43 +0200 [thread overview]
Message-ID: <YUB8Z8ArmIbjI6i+@ninjato> (raw)
In-Reply-To: <CAMuHMdV1Cd23aaVKq1PyXHrc6W9FyikKOCpD0-PZqkgbVFbA5Q@mail.gmail.com>
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On Wed, Aug 25, 2021 at 02:47:21PM +0200, Geert Uytterhoeven wrote:
> CC Wolfram
>
> On Wed, Aug 25, 2021 at 2:28 PM Adam Ford <aford173@gmail.com> wrote:
> > The desired i2c2 speed is 400KHz, but when measured on a scope, it
> > is incorrect. The driver can use the i2c-scl-rising-time-ns to help
> > calculate the proper setting to get exactly 400KHz.
The question for me is: Has it been measured that SCL rising time is
really 50ns or has it been measured that the bus clock is now exactly
400kHz?
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next prev parent reply other threads:[~2021-09-14 10:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-25 12:27 [PATCH] arm64: dts: renesas: beacon: Fix i2c2 speed calcuation Adam Ford
2021-08-25 12:47 ` Geert Uytterhoeven
2021-09-14 10:41 ` Wolfram Sang [this message]
2021-09-20 12:25 ` Adam Ford
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