LXR linux/include/linux/spi/mcp23s08.h

   1
   2/* FIXME driver should be able to handle IRQs...  */
   3
   4struct mcp23s08_chip_info {
   5        bool            is_present;     /* true if populated */
   6        unsigned        pullups;        /* BIT(x) means enable pullup x */
   7};
   8
   9struct 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