linux-kernel - Re: [PATCH 4/5] Blackfin SPI Driver: Add GPIO controlled SPI Slave Select support

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Date:	Thu, 5 Feb 2009 14:12:55 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Bryan Wu <cooloney@...nel.org>
Cc:	dbrownell@...rs.sourceforge.net,
	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, michael.hennerich@...log.com,
	cooloney@...nel.org
Subject: Re: [PATCH 4/5] Blackfin SPI Driver: Add GPIO controlled SPI Slave
 Select support

On Thu,  5 Feb 2009 18:07:32 +0800
Bryan Wu <cooloney@...nel.org> wrote:

> 
> This patch adds support for GPIO controlled SPI Chip Selects.
> To make use of this feature, set chip_select = 0 and add a proper
> cs_gpio to your controller_data.
> 
> struct spi_board_info
>         .chip_select = 0
> 
> struct bfin5xx_spi_chip
>         .cs_gpio = GPIO_P###
> 
> There are various SPI devices that require SPI MODE_0,
> and need to have the Chip Selects asserted during the entire transfer.
> Consider using SPI_MODE_3 (SPI_CPHA | SPI_CPOL) if your device allows
> it.

Cannot apply this due to previously-mentioned driver-core-tramplings.
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