42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/* linux/spi/ad7879.h */
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/* Touchscreen characteristics vary between boards and models. The
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* platform_data for the device's "struct device" holds this information.
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*
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* It's OK if the min/max values are zero.
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*/
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struct ad7879_platform_data {
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u16 model; /* 7879 */
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u16 x_plate_ohms;
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u16 x_min, x_max;
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u16 y_min, y_max;
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u16 pressure_min, pressure_max;
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bool swap_xy; /* swap x and y axes */
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/* [0..255] 0=OFF Starts at 1=550us and goes
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* all the way to 9.440ms in steps of 35us.
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*/
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u8 pen_down_acc_interval;
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/* [0..15] Starts at 0=128us and goes all the
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* way to 4.096ms in steps of 128us.
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*/
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u8 first_conversion_delay;
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/* [0..3] 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */
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u8 acquisition_time;
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/* [0..3] Average X middle samples 0 = 2, 1 = 4, 2 = 8, 3 = 16 */
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u8 averaging;
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/* [0..3] Perform X measurements 0 = OFF,
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* 1 = 4, 2 = 8, 3 = 16 (median > averaging)
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*/
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u8 median;
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/* 1 = AUX/VBAT/GPIO export GPIO to gpiolib
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* requires CONFIG_GPIOLIB
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*/
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bool gpio_export;
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/* identifies the first GPIO number handled by this chip;
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* or, if negative, requests dynamic ID allocation.
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*/
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s32 gpio_base;
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};
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