ARM: AT91: Add platform data for the AT91 ADCs

/*

 * Copyright (C) 2011 Free Electrons

 *

 * Licensed under the GPLv2 or later.

 */

#ifndef _AT91_ADC_H_

#define _AT91_ADC_H_

/**

 * 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;

};

/**

 * 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

 * @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;

};

extern void __init at91_add_device_adc(struct at91_adc_data *data);

#endif