/* 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; };