[linux-2.6-block.git] / include / linux / spi / mcp23s08.h

/* 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;
};
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
e58b9e27	2	struct mcp23s08_platform_data {
0b7bb77f PK	3	/* For mcp23s08, up to 4 slaves (numbered 0..3) can share one SPI
	4	* chipselect, each providing 1 gpio_chip instance with 8 gpios.
	5	* For mpc23s17, up to 8 slaves (numbered 0..7) can share one SPI
	6	* chipselect, each providing 1 gpio_chip (port A + port B) with
	7	* 16 gpios.
8f1cc3b1	8	*/
ce9bd0a0	9	u32 spi_present_mask;
e58b9e27	10
7f38c5b9 SR	11	/* "base" is the number of the first GPIO or -1 for dynamic
	12	* assignment. If there are gaps in chip addressing the GPIO
	13	* numbers are sequential .. so for example if only slaves 0
	14	* and 3 are present, their GPIOs range from base to base+15
	15	* (or base+31 for s17 variant).
8f1cc3b1	16	*/
e58b9e27	17	unsigned base;
e58b9e27	18	};