tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1
2/* FIXME driver should be able to handle IRQs... */
3
4struct mcp23s08_chip_info {
5 bool is_present; /* true iff populated */
6 u8 pullups; /* BIT(x) means enable pullup x */
7};
8
9struct mcp23s08_platform_data {
10 /* Four slaves (numbered 0..3) can share one SPI chipselect, and
11 * will provide 8..32 GPIOs using 1..4 gpio_chip instances.
12 */
13 struct mcp23s08_chip_info chip[4];
14
15 /* "base" is the number of the first GPIO. Dynamic assignment is
16 * not currently supported, and even if there are gaps in chip
17 * addressing the GPIO numbers are sequential .. so for example
18 * if only slaves 0 and 3 are present, their GPIOs range from
19 * base to base+15.
20 */
21 unsigned base;
22
23 void *context; /* param to setup/teardown */
24
25 int (*setup)(struct spi_device *spi,
26 int gpio, unsigned ngpio,
27 void *context);
28 int (*teardown)(struct spi_device *spi,
29 int gpio, unsigned ngpio,
30 void *context);
31};