e58b9e2762
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>
25 lines
554 B
C
25 lines
554 B
C
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/* FIXME driver should be able to handle all four slaves that
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* can be hooked up to each chipselect, as well as IRQs...
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*/
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struct mcp23s08_platform_data {
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/* four slaves can share one SPI chipselect */
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u8 slave;
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/* number assigned to the first GPIO */
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unsigned base;
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/* pins with pullups */
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u8 pullups;
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void *context; /* param to setup/teardown */
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int (*setup)(struct spi_device *spi,
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int gpio, unsigned ngpio,
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void *context);
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int (*teardown)(struct spi_device *spi,
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int gpio, unsigned ngpio,
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void *context);
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};
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