Commit | Line | Data |
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b4be468c MH |
1 | /* linux/spi/ad7879.h */ |
2 | ||
3 | /* Touchscreen characteristics vary between boards and models. The | |
4 | * platform_data for the device's "struct device" holds this information. | |
5 | * | |
6 | * It's OK if the min/max values are zero. | |
7 | */ | |
8 | struct ad7879_platform_data { | |
9 | u16 model; /* 7879 */ | |
10 | u16 x_plate_ohms; | |
11 | u16 x_min, x_max; | |
12 | u16 y_min, y_max; | |
13 | u16 pressure_min, pressure_max; | |
14 | ||
6680884a MH |
15 | bool swap_xy; /* swap x and y axes */ |
16 | ||
b4be468c MH |
17 | /* [0..255] 0=OFF Starts at 1=550us and goes |
18 | * all the way to 9.440ms in steps of 35us. | |
19 | */ | |
20 | u8 pen_down_acc_interval; | |
21 | /* [0..15] Starts at 0=128us and goes all the | |
22 | * way to 4.096ms in steps of 128us. | |
23 | */ | |
24 | u8 first_conversion_delay; | |
25 | /* [0..3] 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */ | |
26 | u8 acquisition_time; | |
27 | /* [0..3] Average X middle samples 0 = 2, 1 = 4, 2 = 8, 3 = 16 */ | |
28 | u8 averaging; | |
29 | /* [0..3] Perform X measurements 0 = OFF, | |
30 | * 1 = 4, 2 = 8, 3 = 16 (median > averaging) | |
31 | */ | |
32 | u8 median; | |
ec51b7f5 MH |
33 | /* 1 = AUX/VBAT/GPIO export GPIO to gpiolib |
34 | * requires CONFIG_GPIOLIB | |
35 | */ | |
36 | bool gpio_export; | |
37 | /* identifies the first GPIO number handled by this chip; | |
38 | * or, if negative, requests dynamic ID allocation. | |
39 | */ | |
40 | s32 gpio_base; | |
b4be468c | 41 | }; |