From: ben.dooks@codethink.co.uk (Ben Dooks)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC] i2c: Providing hooks for i2c multimaster bus arbitration.
Date: Tue, 12 Feb 2013 10:49:29 +0000 [thread overview]
Message-ID: <511A1E39.5000304@codethink.co.uk> (raw)
In-Reply-To: <20130210181710.GB12760@nekote.pengutronix.de>
On 10/02/13 18:17, Wolfram Sang wrote:
> On Mon, Feb 04, 2013 at 02:33:15PM +0530, Yuvaraj Kumar C D wrote:
>> This RFC patch is w.r.t multimaster bus arbitration which is already
>> being discussing in the mainline.
>> This patch provides hooks for the i2c multimaster bus arbitration
>> and to have the arbitration parameters.
>
> I still haven't understood why the arbitration specified in the I2C
> standard is not enough for you. Or what you would need to make use of
> it.
I am a little concerned as there is no way to actually lock a bus to
stop another master from transmitting. You can get collisions in a
multi-master environment. Drivers need fixing to deal with collisions
and let the sender know the operation has failed.
--
Ben Dooks http://www.codethink.co.uk/
Senior Engineer Codethink - Providing Genius
next prev parent reply other threads:[~2013-02-12 10:49 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-04 9:03 [RFC] i2c: Providing hooks for i2c multimaster bus arbitration Yuvaraj Kumar C D
2013-02-04 9:03 ` Yuvaraj Kumar C D
2013-02-04 11:13 ` Yuvaraj Kumar
2013-02-04 11:13 ` Yuvaraj Kumar
2013-02-06 0:23 ` Doug Anderson
2013-02-06 0:23 ` Doug Anderson
[not found] ` <CAD=FV=VQywwQ3YAFb=1qFmd3UEW39Xu=ok6fdjhvBXdwOQOa1Q@mail.gmail.com>
[not found] ` <CAD=FV=VQywwQ3YAFb=1qFmd3UEW39Xu=ok6fdjhvBXdwOQOa1Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-06 5:28 ` Yuvaraj Kumar
2013-02-06 5:28 ` Yuvaraj Kumar
2013-02-06 5:33 ` Yuvaraj Kumar
2013-02-06 5:33 ` Yuvaraj Kumar
2013-02-06 6:00 ` Simon Glass
2013-02-06 6:00 ` Simon Glass
2013-02-10 18:17 ` Wolfram Sang
2013-02-10 18:17 ` Wolfram Sang
2013-02-11 23:53 ` Doug Anderson
2013-02-11 23:53 ` Doug Anderson
2013-02-12 0:17 ` Simon Glass
2013-02-12 0:17 ` Simon Glass
[not found] ` <CAPnjgZ3HnXDp9ErsbZEfpc-NexuAt1C5cUWbFn=BW2TMGiMJEg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-12 10:03 ` Wolfram Sang
2013-02-12 10:03 ` Wolfram Sang
2013-02-12 10:49 ` Ben Dooks [this message]
2013-02-12 16:48 ` Uwe Kleine-König
[not found] ` <20130212164811.GV8668-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2013-05-08 15:57 ` i2c multimaster and the device driver detect function Jean-François Dagenais
2013-05-08 15:57 ` [lm-sensors] " Jean-François Dagenais
[not found] ` <3D8D1B67-2846-4B78-B402-6B9FD1CB10E6-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-05-08 17:54 ` Guenter Roeck
2013-05-08 17:54 ` Guenter Roeck
[not found] ` <20130508175417.GB29689-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2013-05-09 1:50 ` Jean-François Dagenais
2013-05-09 1:50 ` Jean-François Dagenais
2013-05-09 3:53 ` Guenter Roeck
2013-05-09 3:53 ` [lm-sensors] " Guenter Roeck
[not found] ` <20130509035313.GA26817-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2013-05-09 12:38 ` Jean-François Dagenais
2013-05-09 12:38 ` Jean-François Dagenais
[not found] ` <3322BACE-9434-4249-8621-C1AD0D340A8A-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-05-09 13:30 ` Guenter Roeck
2013-05-09 13:30 ` Guenter Roeck
2013-05-13 8:11 ` Jean Delvare
2013-05-13 8:11 ` Jean Delvare
[not found] ` <20130513101150.0c9e4d30-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2013-05-13 13:54 ` Jean-François Dagenais
2013-05-13 13:54 ` Jean-François Dagenais
[not found] ` <E43DA0E6-A130-4837-8343-EEC182A12EE6-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-05-13 14:14 ` Jean Delvare
2013-05-13 14:14 ` Jean Delvare
[not found] ` <20130513161413.58ebc9e8-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2013-05-13 14:56 ` Guenter Roeck
2013-05-13 14:56 ` Guenter Roeck
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