/usr/src/linux-headers-5.15.0-190/include/linux/spi
Edit: /usr/src/linux-headers-5.15.0-190/include/linux/spi/ad7877.h (835B)
/* SPDX-License-Identifier: GPL-2.0 */
/* linux/spi/ad7877.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 ad7877_platform_data {
u16 model; /* 7877 */
u16 vref_delay_usecs; /* 0 for external vref; etc */
u16 x_plate_ohms;
u16 y_plate_ohms;
u16 x_min, x_max;
u16 y_min, y_max;
u16 pressure_min, pressure_max;
u8 stopacq_polarity; /* 1 = Active HIGH, 0 = Active LOW */
u8 first_conversion_delay; /* 0 = 0.5us, 1 = 128us, 2 = 1ms, 3 = 8ms */
u8 acquisition_time; /* 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */
u8 averaging; /* 0 = 1, 1 = 4, 2 = 8, 3 = 16 */
u8 pen_down_acc_interval; /* 0 = covert once, 1 = every 0.5 ms,
2 = ever 1 ms, 3 = every 8 ms,*/
};