mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
2.0 KiB
62 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* linux/spi/ads7846.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. |
|
*/ |
|
enum ads7846_filter { |
|
ADS7846_FILTER_OK, |
|
ADS7846_FILTER_REPEAT, |
|
ADS7846_FILTER_IGNORE, |
|
}; |
|
|
|
struct ads7846_platform_data { |
|
u16 model; /* 7843, 7845, 7846, 7873. */ |
|
u16 vref_delay_usecs; /* 0 for external vref; etc */ |
|
u16 vref_mv; /* external vref value, milliVolts |
|
* ads7846: if 0, use internal vref */ |
|
bool keep_vref_on; /* set to keep vref on for differential |
|
* measurements as well */ |
|
bool swap_xy; /* swap x and y axes */ |
|
|
|
/* Settling time of the analog signals; a function of Vcc and the |
|
* capacitance on the X/Y drivers. If set to non-zero, two samples |
|
* are taken with settle_delay us apart, and the second one is used. |
|
* ~150 uSec with 0.01uF caps. |
|
*/ |
|
u16 settle_delay_usecs; |
|
|
|
/* If set to non-zero, after samples are taken this delay is applied |
|
* and penirq is rechecked, to help avoid false events. This value |
|
* is affected by the material used to build the touch layer. |
|
*/ |
|
u16 penirq_recheck_delay_usecs; |
|
|
|
u16 x_plate_ohms; |
|
u16 y_plate_ohms; |
|
|
|
u16 x_min, x_max; |
|
u16 y_min, y_max; |
|
u16 pressure_min, pressure_max; |
|
|
|
u16 debounce_max; /* max number of additional readings |
|
* per sample */ |
|
u16 debounce_tol; /* tolerance used for filtering */ |
|
u16 debounce_rep; /* additional consecutive good readings |
|
* required after the first two */ |
|
int gpio_pendown; /* the GPIO used to decide the pendown |
|
* state if get_pendown_state == NULL */ |
|
int gpio_pendown_debounce; /* platform specific debounce time for |
|
* the gpio_pendown */ |
|
int (*get_pendown_state)(void); |
|
int (*filter_init) (const struct ads7846_platform_data *pdata, |
|
void **filter_data); |
|
int (*filter) (void *filter_data, int data_idx, int *val); |
|
void (*filter_cleanup)(void *filter_data); |
|
void (*wait_for_sync)(void); |
|
bool wakeup; |
|
unsigned long irq_flags; |
|
}; |
|
|
|
|