| Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 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 | |
| 15 | /* [0..255] 0=OFF Starts at 1=550us and goes |
| 16 | * all the way to 9.440ms in steps of 35us. |
| 17 | */ |
| 18 | u8 pen_down_acc_interval; |
| 19 | /* [0..15] Starts at 0=128us and goes all the |
| 20 | * way to 4.096ms in steps of 128us. |
| 21 | */ |
| 22 | u8 first_conversion_delay; |
| 23 | /* [0..3] 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */ |
| 24 | u8 acquisition_time; |
| 25 | /* [0..3] Average X middle samples 0 = 2, 1 = 4, 2 = 8, 3 = 16 */ |
| 26 | u8 averaging; |
| 27 | /* [0..3] Perform X measurements 0 = OFF, |
| 28 | * 1 = 4, 2 = 8, 3 = 16 (median > averaging) |
| 29 | */ |
| 30 | u8 median; |
| Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 31 | /* 1 = AUX/VBAT/GPIO export GPIO to gpiolib |
| 32 | * requires CONFIG_GPIOLIB |
| 33 | */ |
| 34 | bool gpio_export; |
| 35 | /* identifies the first GPIO number handled by this chip; |
| 36 | * or, if negative, requests dynamic ID allocation. |
| 37 | */ |
| 38 | s32 gpio_base; |
| Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 39 | }; |