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Maxime Ripard
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Greg Kroah-Hartman
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May 14, 2012
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/* | ||
* Copyright (C) 2011 Free Electrons | ||
* | ||
* Licensed under the GPLv2 or later. | ||
*/ | ||
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#ifndef _AT91_ADC_H_ | ||
#define _AT91_ADC_H_ | ||
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/** | ||
* struct at91_adc_reg_desc - Various informations relative to registers | ||
* @channel_base: Base offset for the channel data registers | ||
* @drdy_mask: Mask of the DRDY field in the relevant registers | ||
(Interruptions registers mostly) | ||
* @status_register: Offset of the Interrupt Status Register | ||
* @trigger_register: Offset of the Trigger setup register | ||
*/ | ||
struct at91_adc_reg_desc { | ||
u8 channel_base; | ||
u32 drdy_mask; | ||
u8 status_register; | ||
u8 trigger_register; | ||
}; | ||
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/** | ||
* 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; | ||
}; | ||
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/** | ||
* struct at91_adc_data - platform data for ADC driver | ||
* @channels_used: channels in use on the board as a bitmask | ||
* @num_channels: global number of channels available on the board | ||
* @registers: Registers definition on the board | ||
* @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 | ||
*/ | ||
struct at91_adc_data { | ||
unsigned long channels_used; | ||
u8 num_channels; | ||
struct at91_adc_reg_desc *registers; | ||
u8 startup_time; | ||
struct at91_adc_trigger *trigger_list; | ||
u8 trigger_number; | ||
bool use_external_triggers; | ||
u16 vref; | ||
}; | ||
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extern void __init at91_add_device_adc(struct at91_adc_data *data); | ||
#endif |