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_debounce; /* platform specific debounce time for |
39 | * the gpio_pendown */ |
40 | int (*get_pendown_state)(void); |
41 | void (*wait_for_sync)(void); |
42 | bool wakeup; |
43 | unsigned long irq_flags; |
44 | }; |
45 | |
46 | |