text: /*
   * 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
  