Date: Sun, 8 Feb 2015 12:03:25 +0100
From: Wolfram Sang <wsa@the-dreams.de>
To: Ray Jui <rjui@broadcom.com>
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
Subject: Re: [PATCH v8 2/3] i2c: iproc: Add Broadcom iProc I2C Driver
Message-ID: <20150208110325.GA2750@katana>
References: <rjui@broadcom.com>
 <1423272507-18459-1-git-send-email-rjui@broadcom.com>
 <1423272507-18459-3-git-send-email-rjui@broadcom.com>
 <20150207175039.GB6263@katana>
 <54D6EF3D.4030302@broadcom.com>
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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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