xref: /OK3568_Linux_fs/kernel/include/linux/spi/ad7877.h (revision 4882a59341e53eb6f0b4789bf948001014eff981)
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /* linux/spi/ad7877.h */
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun /* Touchscreen characteristics vary between boards and models.  The
5*4882a593Smuzhiyun  * platform_data for the device's "struct device" holds this information.
6*4882a593Smuzhiyun  *
7*4882a593Smuzhiyun  * It's OK if the min/max values are zero.
8*4882a593Smuzhiyun  */
9*4882a593Smuzhiyun struct ad7877_platform_data {
10*4882a593Smuzhiyun 	u16	model;			/* 7877 */
11*4882a593Smuzhiyun 	u16	vref_delay_usecs;	/* 0 for external vref; etc */
12*4882a593Smuzhiyun 	u16	x_plate_ohms;
13*4882a593Smuzhiyun 	u16	y_plate_ohms;
14*4882a593Smuzhiyun 
15*4882a593Smuzhiyun 	u16	x_min, x_max;
16*4882a593Smuzhiyun 	u16	y_min, y_max;
17*4882a593Smuzhiyun 	u16	pressure_min, pressure_max;
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun 	u8	stopacq_polarity;	/* 1 = Active HIGH, 0 = Active LOW */
20*4882a593Smuzhiyun 	u8	first_conversion_delay;	/* 0 = 0.5us, 1 = 128us, 2 = 1ms, 3 = 8ms */
21*4882a593Smuzhiyun 	u8	acquisition_time;	/* 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */
22*4882a593Smuzhiyun 	u8	averaging;		/* 0 = 1, 1 = 4, 2 = 8, 3 = 16 */
23*4882a593Smuzhiyun 	u8	pen_down_acc_interval;	/* 0 = covert once, 1 = every 0.5 ms,
24*4882a593Smuzhiyun 					   2 = ever 1 ms,   3 = every 8 ms,*/
25*4882a593Smuzhiyun };
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