kernel-ark/include/linux/spi/mcp23s08.h
David Brownell e58b9e2762 mcp23s08 spi gpio expander support
Basic driver for 8-bit SPI based MCP23S08 GPIO expander, without support for
IRQs or the shared chipselect mechanism.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Eric Miao <eric.miao@marvell.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:13 -08:00

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C

/* FIXME driver should be able to handle all four slaves that
* can be hooked up to each chipselect, as well as IRQs...
*/
struct mcp23s08_platform_data {
/* four slaves can share one SPI chipselect */
u8 slave;
/* number assigned to the first GPIO */
unsigned base;
/* pins with pullups */
u8 pullups;
void *context; /* param to setup/teardown */
int (*setup)(struct spi_device *spi,
int gpio, unsigned ngpio,
void *context);
int (*teardown)(struct spi_device *spi,
int gpio, unsigned ngpio,
void *context);
};