mpc52xx_spi: add gpio chipselect

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This one enables the mpc52xx_spi driver for usage of user defined gpio lines
as chipselect. This way we can control some more spi devices than only one

V2 Changes:
* preinitialize the gpio as output in probe function and call gpio_set_value in
  the chip select function instead of calling direction_output every time.
* initialize the gpio line with output high, since we don't support CS_HIGH
  in the driver currently any way. change gpio value setting to default active
  low in chip select call.
* free the gpio array while error or removing.

Signed-off-by: Luotao Fu <l.fu@pengutronix.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

...

This commit is contained in:

Luotao Fu 2009-11-13 10:41:17 +01:00 • committed by Grant Likely

parent d65aea99bd

commit b8d4e2ce60

1 changed files with 60 additions and 4 deletions

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drivers/spi/mpc52xx_spi.c

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