From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfram Sang <wsa@the-dreams.de>
Subject: Re: [PATCH v8 2/3] i2c: iproc: Add Broadcom iProc I2C Driver
Date: Sun, 8 Feb 2015 12:03:25 +0100
Message-ID: <20150208110325.GA2750@katana>
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Cc: Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>, Arend van Spriel <arend@broadcom.com>, Kevin Cernekee <cernekee@chromium.org>, Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>, Ian Campbell <ijc+devicetree@hellion.org.uk>, Kumar Gala <galak@codeaurora.org>, Grant Likely <grant.likely@linaro.org>, Christian Daudt <bcm@fixthebug.org>, Matt Porter <mporter@linaro.org>, Florian Fainelli <f.fainelli@gmail.com>, Russell King <linux@arm.linux.org.uk>, Scott Branden <sbranden@broadcom.com>, Dmitry Torokhov <dtor@google.com>, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, bcm-kernel-feedback-list@broadcom.com, devicetree@vger.kernel.org
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> > Is it really a HW limitation? Could the driver later be extended to
> > continue filling the FIFO if a certain threshold is reached?
> >=20
>=20
> Will return -EOPNOTSUPP. This really depends on whether or not we expect
> one sequence of START + SLV ADDR + DATA + STOP per i2c message. I can
> later extend the driver to refill/re-drain the FIFO for data size >=3D 64
> bytes, if one sequence of SATRT...STOP per message is not a requirement.

It is important to have the terminology clear here: One transfer can
consist of multiple messages. The transfer uses START/STOP at the
beginning/end, the messages within the transfer only REPEATED_START.


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