/*
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* AD7606 ADC driver
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*
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* Copyright 2011 Analog Devices Inc.
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*
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* Licensed under the GPL-2.
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*/
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#ifndef IIO_ADC_AD7606_H_
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#define IIO_ADC_AD7606_H_
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/**
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* struct ad7606_chip_info - chip specific information
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* @name: identification string for chip
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* @channels: channel specification
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* @num_channels: number of channels
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* @lock protect sensor state
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*/
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struct ad7606_chip_info {
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const struct iio_chan_spec *channels;
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unsigned int num_channels;
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};
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/**
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* struct ad7606_state - driver instance specific data
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* @lock protect sensor state
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*/
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struct ad7606_state {
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struct device *dev;
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const struct ad7606_chip_info *chip_info;
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struct regulator *reg;
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struct work_struct poll_work;
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wait_queue_head_t wq_data_avail;
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const struct ad7606_bus_ops *bops;
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unsigned int range;
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unsigned int oversampling;
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bool done;
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void __iomem *base_address;
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struct mutex lock; /* protect sensor state */
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struct gpio_desc *gpio_convst;
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struct gpio_desc *gpio_reset;
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struct gpio_desc *gpio_range;
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struct gpio_desc *gpio_standby;
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struct gpio_desc *gpio_frstdata;
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struct gpio_descs *gpio_os;
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/*
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* DMA (thus cache coherency maintenance) requires the
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* transfer buffers to live in their own cache lines.
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* 8 * 16-bit samples + 64-bit timestamp
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*/
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unsigned short data[12] ____cacheline_aligned;
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};
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struct ad7606_bus_ops {
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/* more methods added in future? */
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int (*read_block)(struct device *dev, int num, void *data);
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};
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int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
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const char *name, unsigned int id,
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const struct ad7606_bus_ops *bops);
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int ad7606_remove(struct device *dev, int irq);
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enum ad7606_supported_device_ids {
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ID_AD7606_8,
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ID_AD7606_6,
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ID_AD7606_4
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};
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#ifdef CONFIG_PM_SLEEP
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extern const struct dev_pm_ops ad7606_pm_ops;
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#define AD7606_PM_OPS (&ad7606_pm_ops)
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#else
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#define AD7606_PM_OPS NULL
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#endif
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#endif /* IIO_ADC_AD7606_H_ */
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