Release 4.11 drivers/staging/iio/adc/ad7606.h

/*
 * AD7606 ADC driver
 *
 * Copyright 2011 Analog Devices Inc.
 *
 * Licensed under the GPL-2.
 */

#ifndef IIO_ADC_AD7606_H_

#define IIO_ADC_AD7606_H_

/**
 * struct ad7606_chip_info - chip specific information
 * @name:               identification string for chip
 * @channels:           channel specification
 * @num_channels:       number of channels
 */


struct ad7606_chip_info {
	
const struct iio_chan_spec	*channels;
	
unsigned int			num_channels;
};

/**
 * struct ad7606_state - driver instance specific data
 */


struct ad7606_state {
	
struct device			*dev;
	
const struct ad7606_chip_info	*chip_info;
	
struct regulator		*reg;
	
struct work_struct		poll_work;
	
wait_queue_head_t		wq_data_avail;
	
const struct ad7606_bus_ops	*bops;
	
unsigned int			range;
	
unsigned int			oversampling;
	
bool				done;
	
void __iomem			*base_address;

	
struct gpio_desc		*gpio_convst;
	
struct gpio_desc		*gpio_reset;
	
struct gpio_desc		*gpio_range;
	
struct gpio_desc		*gpio_standby;
	
struct gpio_desc		*gpio_frstdata;
	
struct gpio_descs		*gpio_os;

	/*
         * DMA (thus cache coherency maintenance) requires the
         * transfer buffers to live in their own cache lines.
         * 8 * 16-bit samples + 64-bit timestamp
         */
	
unsigned short			data[12] ____cacheline_aligned;
};


struct ad7606_bus_ops {
	/* more methods added in future? */
	
int (*read_block)(struct device *, int, void *);
};

int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
		 const char *name, unsigned int id,
		 const struct ad7606_bus_ops *bops);
int ad7606_remove(struct device *dev, int irq);


enum ad7606_supported_device_ids {
	
ID_AD7606_8,
	
ID_AD7606_6,
	
ID_AD7606_4
};

#ifdef CONFIG_PM_SLEEP
extern const struct dev_pm_ops ad7606_pm_ops;

#define AD7606_PM_OPS (&ad7606_pm_ops)
#else

#define AD7606_PM_OPS NULL
#endif

#endif /* IIO_ADC_AD7606_H_ */
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Directory: drivers/staging/iio/adc

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