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