43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* linux/platform_data/ad7879.h */
|
|
|
|
/* Touchscreen characteristics vary between boards and models. The
|
|
* platform_data for the device's "struct device" holds this information.
|
|
*
|
|
* It's OK if the min/max values are zero.
|
|
*/
|
|
struct ad7879_platform_data {
|
|
u16 model; /* 7879 */
|
|
u16 x_plate_ohms;
|
|
u16 x_min, x_max;
|
|
u16 y_min, y_max;
|
|
u16 pressure_min, pressure_max;
|
|
|
|
bool swap_xy; /* swap x and y axes */
|
|
|
|
/* [0..255] 0=OFF Starts at 1=550us and goes
|
|
* all the way to 9.440ms in steps of 35us.
|
|
*/
|
|
u8 pen_down_acc_interval;
|
|
/* [0..15] Starts at 0=128us and goes all the
|
|
* way to 4.096ms in steps of 128us.
|
|
*/
|
|
u8 first_conversion_delay;
|
|
/* [0..3] 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */
|
|
u8 acquisition_time;
|
|
/* [0..3] Average X middle samples 0 = 2, 1 = 4, 2 = 8, 3 = 16 */
|
|
u8 averaging;
|
|
/* [0..3] Perform X measurements 0 = OFF,
|
|
* 1 = 4, 2 = 8, 3 = 16 (median > averaging)
|
|
*/
|
|
u8 median;
|
|
/* 1 = AUX/VBAT/GPIO export GPIO to gpiolib
|
|
* requires CONFIG_GPIOLIB
|
|
*/
|
|
bool gpio_export;
|
|
/* identifies the first GPIO number handled by this chip;
|
|
* or, if negative, requests dynamic ID allocation.
|
|
*/
|
|
s32 gpio_base;
|
|
};
|