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