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


/* FIXME driver should be able to handle IRQs...  */

struct mcp23s08_chip_info {
	bool	is_present;		/* true iff populated */
	u8	pullups;		/* BIT(x) means enable pullup x */
};

struct mcp23s08_platform_data {
	/* Four slaves (numbered 0..3) can share one SPI chipselect, and
	 * will provide 8..32 GPIOs using 1..4 gpio_chip instances.
	 */
	struct mcp23s08_chip_info	chip[4];

	/* "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.
	 */
	unsigned	base;

	void		*context;	/* param to setup/teardown */

	int		(*setup)(struct spi_device *spi,
					int gpio, unsigned ngpio,
					void *context);
	int		(*teardown)(struct spi_device *spi,
					int gpio, unsigned ngpio,
					void *context);
};
Commit	Line	Data
e58b9e27	1
8f1cc3b1 DB	2	/* FIXME driver should be able to handle IRQs... */
	3
	4	struct mcp23s08_chip_info {
	5	bool is_present; /* true iff populated */
	6	u8 pullups; /* BIT(x) means enable pullup x */
	7	};
e58b9e27 DB	8
e58b9e27 DB	9	struct mcp23s08_platform_data {
8f1cc3b1 DB	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];
e58b9e27	14
8f1cc3b1 DB	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	*/
e58b9e27 DB	21	unsigned base;
e58b9e27 DB	22
e58b9e27 DB	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	};