1/*
2 * Copyright (C) 2011 Free Electrons
3 *
4 * Licensed under the GPLv2 or later.
5 */
6
7#ifndef _AT91_ADC_H_
8#define _AT91_ADC_H_
9
10enum atmel_adc_ts_type {
11	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
12	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
13	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
14};
15
16/**
17 * struct at91_adc_trigger - description of triggers
18 * @name:		name of the trigger advertised to the user
19 * @value:		value to set in the ADC's trigger setup register
20			to enable the trigger
21 * @is_external:	Does the trigger rely on an external pin?
22 */
23struct at91_adc_trigger {
24	const char	*name;
25	u8		value;
26	bool		is_external;
27};
28
29/**
30 * struct at91_adc_data - platform data for ADC driver
31 * @channels_used:		channels in use on the board as a bitmask
32 * @startup_time:		startup time of the ADC in microseconds
33 * @trigger_list:		Triggers available in the ADC
34 * @trigger_number:		Number of triggers available in the ADC
35 * @use_external_triggers:	does the board has external triggers availables
36 * @vref:			Reference voltage for the ADC in millivolts
37 * @touchscreen_type:		If a touchscreen is connected, its type (4 or 5 wires)
38 */
39struct at91_adc_data {
40	unsigned long			channels_used;
41	u8				startup_time;
42	struct at91_adc_trigger		*trigger_list;
43	u8				trigger_number;
44	bool				use_external_triggers;
45	u16				vref;
46	enum atmel_adc_ts_type		touchscreen_type;
47};
48
49extern void __init at91_add_device_adc(struct at91_adc_data *data);
50#endif
51