include/linux/platform_data/at91_adc.h

   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
  10 enum 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  */
  23 struct 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  */
  39 struct 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
  49 extern void __init at91_add_device_adc(struct at91_adc_data *data);
  50 #endif