linux-kernel - Re: [PATCH v3 05/14] i2c-octeon: Make adapter timeout tunable

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Message-ID: <20160312154611.GH1661@katana>
Date:	Sat, 12 Mar 2016 16:46:12 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Jan Glauber <jglauber@...ium.com>
Cc:	linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
	David Daney <ddaney@...iumnetworks.com>,
	Peter Swain <pswain@...ium.com>
Subject: Re: [PATCH v3 05/14] i2c-octeon: Make adapter timeout tunable

On Mon, Mar 07, 2016 at 04:10:48PM +0100, Jan Glauber wrote:
> From: Peter Swain <pswain@...ium.com>
> 
> Make the i2c adapter timeout a module parameter to allow upper-level
> target device drivers to retry with their own logic before their own
> timeouts abort operations.
> 
> For example, at24 eeprom driver retries for 25ms when -EAGAIN
> indicates that an eeprom has gone unresponsive while committing
> a newly written page (5ms on typical devices).
> 
> Signed-off-by: Peter Swain <pswain@...ium.com>
> Signed-off-by: Jan Glauber <jglauber@...ium.com>

i2c-dev has IOCTLs for timeout and retries. Can't you use those?


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