Edit File: mcp23s08.h
/* FIXME driver should be able to handle IRQs... */ struct mcp23s08_chip_info { bool is_present; /* true if populated */ unsigned pullups; /* BIT(x) means enable pullup x */ }; struct mcp23s08_platform_data { /* For mcp23s08, up to 4 slaves (numbered 0..3) can share one SPI * chipselect, each providing 1 gpio_chip instance with 8 gpios. * For mpc23s17, up to 8 slaves (numbered 0..7) can share one SPI * chipselect, each providing 1 gpio_chip (port A + port B) with * 16 gpios. */ struct mcp23s08_chip_info chip[8]; /* "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 (or base+31 for s17 variant). */ unsigned base; };