| /* linux/spi/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; |
| |
| /* [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; |
| }; |