32 lines
919 B
C
32 lines
919 B
C
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/* FIXME driver should be able to handle IRQs... */
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struct mcp23s08_chip_info {
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bool is_present; /* true iff populated */
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u8 pullups; /* BIT(x) means enable pullup x */
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};
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struct mcp23s08_platform_data {
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/* Four slaves (numbered 0..3) can share one SPI chipselect, and
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* will provide 8..32 GPIOs using 1..4 gpio_chip instances.
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*/
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struct mcp23s08_chip_info chip[4];
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/* "base" is the number of the first GPIO. Dynamic assignment is
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* not currently supported, and even if there are gaps in chip
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* addressing the GPIO numbers are sequential .. so for example
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* if only slaves 0 and 3 are present, their GPIOs range from
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* base to base+15.
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*/
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unsigned base;
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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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