linux-kernel - Re: [PATCH v8 2/3] i2c: iproc: Add Broadcom iProc I2C Driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 8 Feb 2015 12:03:25 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Ray Jui <rjui@...adcom.com>
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Arend van Spriel <arend@...adcom.com>,
	Kevin Cernekee <cernekee@...omium.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	Christian Daudt <bcm@...thebug.org>,
	Matt Porter <mporter@...aro.org>,
	Florian Fainelli <f.fainelli@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Scott Branden <sbranden@...adcom.com>,
	Dmitry Torokhov <dtor@...gle.com>, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org
Subject: Re: [PATCH v8 2/3] i2c: iproc: Add Broadcom iProc I2C Driver


> > Is it really a HW limitation? Could the driver later be extended to
> > continue filling the FIFO if a certain threshold is reached?
> > 
> 
> 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 >= 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.


Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)