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/* SPDX-License-Identifier: GPL-2.0 */
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.
*/
u32 spi_present_mask;
/* "base" is the number of the first GPIO or -1 for dynamic
* assignment. 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;
};