linux-kernel - Re: [spi-devel-general] [patch 2.6.27-git] spi

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Date:	Mon, 20 Oct 2008 10:11:27 +0100
From:	Ben Dooks <ben-linux@...ff.org>
To:	David Brownell <david-b@...bell.net>
Cc:	Magnus Damm <magnus.damm@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	spi-devel-general@...ts.sourceforge.net,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [spi-devel-general] [patch 2.6.27-git] spi_gpio driver

On Sun, Oct 19, 2008 at 09:24:36PM -0700, David Brownell wrote:
> From: David Brownell <dbrownell@...rs.sourceforge.net>
> 
> Generalize the old at91rm9200 "bootstrap" bitbanging SPI master driver
> as "spi_gpio", so it works with arbitrary GPIOs and can be configured
> through platform_data.  Such SPI masters support:
> 
>  - any number of bus instances (bus_num is the platform_device.id)
>  - any number of chipselects (one GPIO per spi_device)
>  - all four SPI_MODE values, and SPI_CS_HIGH
>  - i/o word sizes from 1 to 32 bits;
>  - devices configured as with any other spi_master controller

Probably worth looking at removing the s3c24xx gpio specific driver and
replacing it with this.

-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.

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