linux-kernel - Re: [PATCH 1/2] misc/eeprom: add driver for 93xx46 EEPROMs over GPIO

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Date:	Mon, 6 Jun 2011 10:00:45 +0200
From:	Anatolij Gustschin <agust@...x.de>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	dzu@...x.de
Subject: Re: [PATCH 1/2] misc/eeprom: add driver for 93xx46 EEPROMs over
 GPIO

On Wed, 25 May 2011 10:31:46 +0100
Jonathan Cameron <jic23@....ac.uk> wrote:

> On 05/24/11 17:02, Anatolij Gustschin wrote:
> > 93xx46 EEPROMs can be connected using GPIO lines. Add a generic
> > 93xx46 EEPROM driver using common GPIO API for such configurations.
> > A platform is supposed to register appropriate 93xx46 gpio device
> > providing GPIO interface description and using this driver
> > read/write/erase access to the EEPROM chip can be easily done
> > over sysfs files.
> Could you explain why this makes more sense than an spi driver and
> use of spi_gpio ?
> 
> It's microwire compatible according to random google provided datasheet,
> which iirc is a particular form of spi (half duplex, spi mode 0 according
> to wikipedia)
> 
> That would give us a more generally useful driver.

Reworked the driver to be an spi driver using spi_gpio so
it is more generally useful driver now. spi_gpio driver
needs some fixes, though. I'll submit the new driver soon.
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