From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfram Sang <wsa@the-dreams.de>
Subject: Re: [PATCH v11 3/4] i2c: aspeed: added driver for Aspeed I2C
Date: Tue, 27 Jun 2017 11:00:42 +0200
Message-ID: <20170627090042.GA2408@katana>
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To: Brendan Higgins <brendanhiggins@google.com>
Cc: Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, gregkh@linuxfoundation.org, davem@davemloft.net, mchehab@kernel.org, Joel Stanley <joel@jms.id.au>, martin.petersen@oracle.com, Benjamin Herrenschmidt <benh@kernel.crashing.org>, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, OpenBMC Maillist <openbmc@lists.ozlabs.org>
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> > If SCL is stuck low, how do you want to send a STOP?
> >
>=20
> Fair point. I should probably drop that in the future and just do a
> reset, and even then, doing a
> reset is probably just wishful thinking. If a slave is holding down
> SCL, we are pretty screwed.

Yes, you'd need to reset the client device. And that has to be done in
the client driver. I wonder if i2c_transfer and friends should return a
specific error value in that case... need to think about it.


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