[deliverable/linux.git] / include / linux / spi / mcp23s08.h


/* 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;
};
Commit	Line	Data
e58b9e27	1
8f1cc3b1 DB	2	/* FIXME driver should be able to handle IRQs... */
	3
	4	struct mcp23s08_chip_info {
0b7bb77f PK	5	bool is_present; /* true if populated */
0b7bb77f PK	6	unsigned pullups; /* BIT(x) means enable pullup x */
8f1cc3b1	7	};
e58b9e27 DB	8
e58b9e27 DB	9	struct mcp23s08_platform_data {
0b7bb77f PK	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.
8f1cc3b1	15	*/
0b7bb77f	16	struct mcp23s08_chip_info chip[8];
e58b9e27	17
8f1cc3b1 DB	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
0b7bb77f	22	* base to base+15 (or base+31 for s17 variant).
8f1cc3b1	23	*/
e58b9e27	24	unsigned base;
e58b9e27	25	};