1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* linux/spi/ads7846.h */
3 
4 struct ads7846_platform_data {
5 	u16	model;			/* 7843, 7845, 7846, 7873. */
6 	u16	vref_delay_usecs;	/* 0 for external vref; etc */
7 	u16	vref_mv;		/* external vref value, milliVolts
8 					 * ads7846: if 0, use internal vref */
9 	bool	keep_vref_on;		/* set to keep vref on for differential
10 					 * measurements as well */
11 	bool	swap_xy;		/* swap x and y axes */
12 
13 	/* Settling time of the analog signals; a function of Vcc and the
14 	 * capacitance on the X/Y drivers.  If set to non-zero, two samples
15 	 * are taken with settle_delay us apart, and the second one is used.
16 	 * ~150 uSec with 0.01uF caps.
17 	 */
18 	u16	settle_delay_usecs;
19 
20 	/* If set to non-zero, after samples are taken this delay is applied
21 	 * and penirq is rechecked, to help avoid false events.  This value
22 	 * is affected by the material used to build the touch layer.
23 	 */
24 	u16	penirq_recheck_delay_usecs;
25 
26 	u16	x_plate_ohms;
27 	u16	y_plate_ohms;
28 
29 	u16	x_min, x_max;
30 	u16	y_min, y_max;
31 	u16	pressure_min, pressure_max;
32 
33 	u16	debounce_max;		/* max number of additional readings
34 					 * per sample */
35 	u16	debounce_tol;		/* tolerance used for filtering */
36 	u16	debounce_rep;		/* additional consecutive good readings
37 					 * required after the first two */
38 	int	gpio_pendown;		/* the GPIO used to decide the pendown
39 					 * state if get_pendown_state == NULL */
40 	int	gpio_pendown_debounce;	/* platform specific debounce time for
41 					 * the gpio_pendown */
42 	int	(*get_pendown_state)(void);
43 	void	(*wait_for_sync)(void);
44 	bool	wakeup;
45 	unsigned long irq_flags;
46 };
47 
48