[U-Boot] [PATCH 3/9 v4] i.MX31: support GPIO as a chip-select in the mxc_spi driver

[Jean-Christophe PLAGNIOL-VILLARD]

On 09:26 Fri 13 Feb     , Guennadi Liakhovetski wrote:
> Some SPI devices have special requirements on chip-select handling.
> With this patch we can use a GPIO as a chip-select and strictly follow
> the SPI_XFER_BEGIN and SPI_XFER_END flags.
> 
> Signed-off-by: Guennadi Liakhovetski <lg at denx.de>
> ---
> 
> Changes since v1: long lines split, mx31_gpio_* calls now also defined if 
> CONFIG_MX31_GPIO is not defined (see patch 2/9), '!!' removed.
> Changes since v2: added braces in a multiline if, switched to 
> ARRAY_SIZE().
> Changes since v3: moved GPIO chipselect initialisation into a separate 
> function, as suggested by Wolfgang Denk

Evenif I do not like to only allow to use cpu GPIO as cs

With the current SPI implementation

Ack-by : Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>

Best Regards,
J.