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/* 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;
};


Filemanager

Name Type Size Permission Actions
ad7877.h File 835 B 0644
adi_spi3.h File 15.1 KB 0644
ads7846.h File 2.02 KB 0644
at73c213.h File 828 B 0644
at86rf230.h File 724 B 0644
cc2520.h File 620 B 0644
corgi_lcd.h File 460 B 0644
ds1305.h File 1.08 KB 0644
eeprom.h File 1.19 KB 0644
flash.h File 1023 B 0644
ifx_modem.h File 616 B 0644
l4f00242t03.h File 847 B 0644
libertas_spi.h File 907 B 0644
lms283gf05.h File 775 B 0644
max7301.h File 939 B 0644
mc33880.h File 196 B 0644
mcp23s08.h File 685 B 0644
mmc_spi.h File 1.91 KB 0644
mxs-spi.h File 5.24 KB 0644
pxa2xx_spi.h File 1.5 KB 0644
rspi.h File 715 B 0644
s3c24xx.h File 816 B 0644
sh_hspi.h File 572 B 0644
sh_msiof.h File 357 B 0644
spi-fsl-dspi.h File 955 B 0644
spi.h File 50.33 KB 0644
spi_bitbang.h File 1.43 KB 0644
spi_gpio.h File 2.56 KB 0644
spi_oc_tiny.h File 628 B 0644
tdo24m.h File 210 B 0644
tle62x0.h File 660 B 0644
xilinx_spi.h File 627 B 0644