| /* 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; | |
| }; |