1/* linux/spi/ad7879.h */
2
3/* Touchscreen characteristics vary between boards and models.  The
4 * platform_data for the device's "struct device" holds this information.
5 *
6 * It's OK if the min/max values are zero.
7 */
8struct ad7879_platform_data {
9	u16	model;			/* 7879 */
10	u16	x_plate_ohms;
11	u16	x_min, x_max;
12	u16	y_min, y_max;
13	u16	pressure_min, pressure_max;
14
15	bool	swap_xy;		/* swap x and y axes */
16
17	/* [0..255] 0=OFF Starts at 1=550us and goes
18	 * all the way to 9.440ms in steps of 35us.
19	 */
20	u8	pen_down_acc_interval;
21	/* [0..15] Starts at 0=128us and goes all the
22	 * way to 4.096ms in steps of 128us.
23	 */
24	u8	first_conversion_delay;
25	/* [0..3] 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */
26	u8	acquisition_time;
27	/* [0..3] Average X middle samples 0 = 2, 1 = 4, 2 = 8, 3 = 16 */
28	u8	averaging;
29	/* [0..3] Perform X measurements 0 = OFF,
30	 * 1 = 4, 2 = 8, 3 = 16 (median > averaging)
31	 */
32	u8	median;
33	/* 1 = AUX/VBAT/GPIO export GPIO to gpiolib
34	 * requires CONFIG_GPIOLIB
35	 */
36	bool	gpio_export;
37	/* identifies the first GPIO number handled by this chip;
38	 * or, if negative, requests dynamic ID allocation.
39	 */
40	s32	gpio_base;
41};
42