1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2011 Free Electrons 4 */ 5 6 #ifndef _AT91_ADC_H_ 7 #define _AT91_ADC_H_ 8 9 enum atmel_adc_ts_type { 10 ATMEL_ADC_TOUCHSCREEN_NONE = 0, 11 ATMEL_ADC_TOUCHSCREEN_4WIRE = 4, 12 ATMEL_ADC_TOUCHSCREEN_5WIRE = 5, 13 }; 14 15 /** 16 * struct at91_adc_trigger - description of triggers 17 * @name: name of the trigger advertised to the user 18 * @value: value to set in the ADC's trigger setup register 19 to enable the trigger 20 * @is_external: Does the trigger rely on an external pin? 21 */ 22 struct at91_adc_trigger { 23 const char *name; 24 u8 value; 25 bool is_external; 26 }; 27 28 /** 29 * struct at91_adc_data - platform data for ADC driver 30 * @channels_used: channels in use on the board as a bitmask 31 * @startup_time: startup time of the ADC in microseconds 32 * @trigger_list: Triggers available in the ADC 33 * @trigger_number: Number of triggers available in the ADC 34 * @use_external_triggers: does the board has external triggers availables 35 * @vref: Reference voltage for the ADC in millivolts 36 * @touchscreen_type: If a touchscreen is connected, its type (4 or 5 wires) 37 */ 38 struct at91_adc_data { 39 unsigned long channels_used; 40 u8 startup_time; 41 struct at91_adc_trigger *trigger_list; 42 u8 trigger_number; 43 bool use_external_triggers; 44 u16 vref; 45 enum atmel_adc_ts_type touchscreen_type; 46 }; 47 48 extern void __init at91_add_device_adc(struct at91_adc_data *data); 49 #endif 50