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| author | David Brownell <dbrownell@users.sourceforge.net> | 2008-02-04 22:28:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 09:44:13 -0800 |
| commit | e58b9e2762a6ef99e20dba47aba21b911658541d (patch) | |
| tree | 0097fbe262bb4d1944bfb3c9a922ec36b90851c5 /include/linux/spi | |
| parent | 15fae37d9f5f21571a9618d8353164b6ddfea6f6 (diff) | |
| download | kernel_samsung_aries-e58b9e2762a6ef99e20dba47aba21b911658541d.zip kernel_samsung_aries-e58b9e2762a6ef99e20dba47aba21b911658541d.tar.gz kernel_samsung_aries-e58b9e2762a6ef99e20dba47aba21b911658541d.tar.bz2 | |
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>
Diffstat (limited to 'include/linux/spi')
| -rw-r--r-- | include/linux/spi/mcp23s08.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/spi/mcp23s08.h b/include/linux/spi/mcp23s08.h new file mode 100644 index 0000000..835ddf4 --- /dev/null +++ b/include/linux/spi/mcp23s08.h @@ -0,0 +1,24 @@ + +/* 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); +}; |