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- /* 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;
- /* Marks the device as a interrupt controller.
- * NOTE: The interrupt functionality is only supported for i2c
- * versions of the chips. The spi chips can also do the interrupts,
- * but this is not supported by the linux driver yet.
- */
- bool irq_controller;
- /* Sets the mirror flag in the IOCON register. Devices
- * with two interrupt outputs (these are the devices ending with 17 and
- * those that have 16 IOs) have two IO banks: IO 0-7 form bank 1 and
- * IO 8-15 are bank 2. These chips have two different interrupt outputs:
- * One for bank 1 and another for bank 2. If irq-mirror is set, both
- * interrupts are generated regardless of the bank that an input change
- * occurred on. If it is not set, the interrupt are only generated for
- * the bank they belong to.
- * On devices with only one interrupt output this property is useless.
- */
- bool mirror;
- };
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