1 2 /* FIXME driver should be able to handle IRQs... */ 3 4 struct mcp23s08_chip_info { 5 bool is_present; /* true if populated */ 6 unsigned pullups; /* BIT(x) means enable pullup x */ 7 }; 8 9 struct mcp23s08_platform_data { 10 /* For mcp23s08, up to 4 slaves (numbered 0..3) can share one SPI 11 * chipselect, each providing 1 gpio_chip instance with 8 gpios. 12 * For mpc23s17, up to 8 slaves (numbered 0..7) can share one SPI 13 * chipselect, each providing 1 gpio_chip (port A + port B) with 14 * 16 gpios. 15 */ 16 struct mcp23s08_chip_info chip[8]; 17 18 /* "base" is the number of the first GPIO. Dynamic assignment is 19 * not currently supported, and even if there are gaps in chip 20 * addressing the GPIO numbers are sequential .. so for example 21 * if only slaves 0 and 3 are present, their GPIOs range from 22 * base to base+15 (or base+31 for s17 variant). 23 */ 24 unsigned base; 25 26 void *context; /* param to setup/teardown */ 27 28 int (*setup)(struct spi_device *spi, 29 int gpio, unsigned ngpio, 30 void *context); 31 int (*teardown)(struct spi_device *spi, 32 int gpio, unsigned ngpio, 33 void *context); 34 }; 35