Michael Buesch bfb9bcdbda spi-gpio: allow operation without CS signal ...

Change spi-gpio so that it is possible to drive SPI communications over
GPIO without the need for a chipselect signal.

This is useful in very small setups where there's only one slave device
on the bus.

This patch does not affect existing setups.

I use this for a tiny communication channel between an embedded device and
a microcontroller.  There are not enough GPIOs available for chipselect
and it's not needed anyway in this case.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-04-02 19:04:51 -07:00

..

atmel_spi.c

…

atmel_spi.h

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au1550_spi.c

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Kconfig

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Makefile

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mpc52xx_psc_spi.c

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omap2_mcspi.c

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omap_uwire.c

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orion_spi.c

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pxa2xx_spi.c

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spi_bfin5xx.c

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spi_bitbang.c

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spi_butterfly.c

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spi_gpio.c

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spi_imx.c

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spi_lm70llp.c

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spi_mpc83xx.c

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spi_s3c24xx_gpio.c

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spi_s3c24xx.c

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spi_sh_sci.c

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spi_txx9.c

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spi.c

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spidev.c

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tle62x0.c

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xilinx_spi.c

…