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net/libertas: remove GPIO-CS handling in SPI interface code

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This removes the dependency on GPIO framework and lets the SPI host
driver handle the chip select. The SPI host driver is required to keep
the CS active for the entire message unless cs_change says otherwise.
This patch collects the two/three single SPI transfers into a message.
Also the delay in read path in case use_dummy_writes are not used is
moved into the SPI host driver.

Tested-by: Mike Rapoport <mike@compulab.co.il>
Tested-by: Andrey Yurovsky <andrey@cozybit.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sebastian Andrzej Siewior
2009-06-04 21:57:03 +02:00
committed by John W. Linville
parent 582241a084
commit 4d1d49858c
3 changed files with 45 additions and 52 deletions
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3
include/linux/spi/libertas_spi.h
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@@ -22,9 +22,6 @@ struct libertas_spi_platform_data {
* speed, you may want to use 0 here. */
u16 use_dummy_writes;
/* GPIO number to use as chip select */
u16 gpio_cs;
/* Board specific setup/teardown */
int (*setup)(struct spi_device *spi);
int (*teardown)(struct spi_device *spi);