1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* linux/spi/ads7846.h */ 2 /* linux/spi/ads7846.h */
3 3
4 struct ads7846_platform_data { 4 struct ads7846_platform_data {
5 u16 model; /* 784 5 u16 model; /* 7843, 7845, 7846, 7873. */
6 u16 vref_delay_usecs; /* 0 f 6 u16 vref_delay_usecs; /* 0 for external vref; etc */
7 u16 vref_mv; /* ext 7 u16 vref_mv; /* external vref value, milliVolts
8 * ads 8 * ads7846: if 0, use internal vref */
9 bool keep_vref_on; /* set 9 bool keep_vref_on; /* set to keep vref on for differential
10 * mea 10 * measurements as well */
11 bool swap_xy; /* swa 11 bool swap_xy; /* swap x and y axes */
12 12
13 /* Settling time of the analog signals 13 /* Settling time of the analog signals; a function of Vcc and the
14 * capacitance on the X/Y drivers. If 14 * capacitance on the X/Y drivers. If set to non-zero, two samples
15 * are taken with settle_delay us apar 15 * are taken with settle_delay us apart, and the second one is used.
16 * ~150 uSec with 0.01uF caps. 16 * ~150 uSec with 0.01uF caps.
17 */ 17 */
18 u16 settle_delay_usecs; 18 u16 settle_delay_usecs;
19 19
20 /* If set to non-zero, after samples a 20 /* If set to non-zero, after samples are taken this delay is applied
21 * and penirq is rechecked, to help av 21 * and penirq is rechecked, to help avoid false events. This value
22 * is affected by the material used to 22 * is affected by the material used to build the touch layer.
23 */ 23 */
24 u16 penirq_recheck_delay_usecs; 24 u16 penirq_recheck_delay_usecs;
25 25
26 u16 x_plate_ohms; 26 u16 x_plate_ohms;
27 u16 y_plate_ohms; 27 u16 y_plate_ohms;
28 28
29 u16 x_min, x_max; 29 u16 x_min, x_max;
30 u16 y_min, y_max; 30 u16 y_min, y_max;
31 u16 pressure_min, pressure_max; 31 u16 pressure_min, pressure_max;
32 32
33 u16 debounce_max; /* max 33 u16 debounce_max; /* max number of additional readings
34 * per 34 * per sample */
35 u16 debounce_tol; /* tol 35 u16 debounce_tol; /* tolerance used for filtering */
36 u16 debounce_rep; /* add 36 u16 debounce_rep; /* additional consecutive good readings
37 * req 37 * required after the first two */
>> 38 int gpio_pendown; /* the GPIO used to decide the pendown
>> 39 * state if get_pendown_state == NULL */
38 int gpio_pendown_debounce; /* pla 40 int gpio_pendown_debounce; /* platform specific debounce time for
39 * the 41 * the gpio_pendown */
40 int (*get_pendown_state)(void); 42 int (*get_pendown_state)(void);
41 void (*wait_for_sync)(void); 43 void (*wait_for_sync)(void);
42 bool wakeup; 44 bool wakeup;
43 unsigned long irq_flags; 45 unsigned long irq_flags;
44 }; 46 };
45 47
46 48
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