/*
* Copyright (C) 2011 Free Electrons
*
* Licensed under the GPLv2 or later.
*/
#ifndef _AT91_ADC_H_
#define _AT91_ADC_H_
enum atmel_adc_ts_type {
ATMEL_ADC_TOUCHSCREEN_NONE = 0,
ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
};
/**
* struct at91_adc_trigger - description of triggers
* @name: name of the trigger advertised to the user
* @value: value to set in the ADC's trigger setup register
to enable the trigger
* @is_external: Does the trigger rely on an external pin?
*/
struct at91_adc_trigger {
const char *name;
u8 value;
bool is_external;
};
/**
* struct at91_adc_data - platform data for ADC driver
* @channels_used: channels in use on the board as a bitmask
* @startup_time: startup time of the ADC in microseconds
* @trigger_list: Triggers available in the ADC
* @trigger_number: Number of triggers available in the ADC
* @use_external_triggers: does the board has external triggers availables
* @vref: Reference voltage for the ADC in millivolts
* @touchscreen_type: If a touchscreen is connected, its type (4 or 5 wires)
*/
struct at91_adc_data {
unsigned long channels_used;
u8 startup_time;
struct at91_adc_trigger *trigger_list;
u8 trigger_number;
bool use_external_triggers;
u16 vref;
enum atmel_adc_ts_type touchscreen_type;
};
extern void __init at91_add_device_adc(struct at91_adc_data *data);
#endif