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/*
* AD7606 ADC driver
*
* Copyright 2011 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#ifndef IIO_ADC_AD7606_H_
#define IIO_ADC_AD7606_H_
/*
* TODO: struct ad7606_platform_data needs to go into include/linux/iio
*/
/**
* struct ad7606_platform_data - platform/board specific information
* @default_os: default oversampling value {0, 2, 4, 8, 16, 32, 64}
* @default_range: default range +/-{5000, 10000} mVolt
* @gpio_convst: number of gpio connected to the CONVST pin
* @gpio_reset: gpio connected to the RESET pin, if not used set to -1
* @gpio_range: gpio connected to the RANGE pin, if not used set to -1
* @gpio_os0: gpio connected to the OS0 pin, if not used set to -1
* @gpio_os1: gpio connected to the OS1 pin, if not used set to -1
* @gpio_os2: gpio connected to the OS2 pin, if not used set to -1
* @gpio_frstdata: gpio connected to the FRSTDAT pin, if not used set to -1
* @gpio_stby: gpio connected to the STBY pin, if not used set to -1
*/
struct ad7606_platform_data {
unsigned int default_os;
unsigned int default_range;
unsigned int gpio_convst;
unsigned int gpio_reset;
unsigned int gpio_range;
unsigned int gpio_os0;
unsigned int gpio_os1;
unsigned int gpio_os2;
unsigned int gpio_frstdata;
unsigned int gpio_stby;
};
/**
* 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 char *name;
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 ad7606_platform_data *pdata;
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;
/*
* DMA (thus cache coherency maintenance) requires the
* transfer buffers to live in their own cache lines.
*/
unsigned short data[8] ____cacheline_aligned;
};
struct ad7606_bus_ops {
/* more methods added in future? */
int (*read_block)(struct device *, int, void *);
};
struct iio_dev *ad7606_probe(struct device *dev, int irq,
void __iomem *base_address, unsigned int id,
const struct ad7606_bus_ops *bops);
int ad7606_remove(struct iio_dev *indio_dev, int irq);
int ad7606_reset(struct ad7606_state *st);
enum ad7606_supported_device_ids {
ID_AD7606_8,
ID_AD7606_6,
ID_AD7606_4
};
int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev);
void ad7606_ring_cleanup(struct iio_dev *indio_dev);
#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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