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

14 Feb 2009


      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@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@jcrosoft.com
Best Regards,
J.