4 * Copyright 2011 Analog Devices Inc.
6 * Licensed under the GPL-2.
9 #ifndef IIO_ADC_AD7606_H_
10 #define IIO_ADC_AD7606_H_
13 * TODO: struct ad7606_platform_data needs to go into include/linux/iio
17 * struct ad7606_platform_data - platform/board specifc information
18 * @default_os: default oversampling value {0, 2, 4, 8, 16, 32, 64}
19 * @default_range: default range +/-{5000, 10000} mVolt
20 * @gpio_convst: number of gpio connected to the CONVST pin
21 * @gpio_reset: gpio connected to the RESET pin, if not used set to -1
22 * @gpio_range: gpio connected to the RANGE pin, if not used set to -1
23 * @gpio_os0: gpio connected to the OS0 pin, if not used set to -1
24 * @gpio_os1: gpio connected to the OS1 pin, if not used set to -1
25 * @gpio_os2: gpio connected to the OS2 pin, if not used set to -1
26 * @gpio_frstdata: gpio connected to the FRSTDAT pin, if not used set to -1
27 * @gpio_stby: gpio connected to the STBY pin, if not used set to -1
30 struct ad7606_platform_data {
32 unsigned default_range;
39 unsigned gpio_frstdata;
44 * struct ad7606_chip_info - chip specifc information
45 * @name: indentification string for chip
46 * @int_vref_mv: the internal reference voltage
47 * @channels: channel specification
48 * @num_channels: number of channels
51 struct ad7606_chip_info {
56 struct iio_chan_spec *channels;
57 unsigned num_channels;
61 * struct ad7606_state - driver instance specific data
65 struct iio_dev *indio_dev;
67 const struct ad7606_chip_info *chip_info;
68 struct ad7606_platform_data *pdata;
69 struct regulator *reg;
70 struct work_struct poll_work;
71 wait_queue_head_t wq_data_avail;
73 const struct ad7606_bus_ops *bops;
77 unsigned oversampling;
84 void __iomem *base_address;
87 * DMA (thus cache coherency maintenance) requires the
88 * transfer buffers to live in their own cache lines.
91 unsigned short data[8] ____cacheline_aligned;
94 struct ad7606_bus_ops {
95 /* more methods added in future? */
96 int (*read_block)(struct device *, int, void *);
99 void ad7606_suspend(struct ad7606_state *st);
100 void ad7606_resume(struct ad7606_state *st);
101 struct ad7606_state *ad7606_probe(struct device *dev, int irq,
102 void __iomem *base_address, unsigned id,
103 const struct ad7606_bus_ops *bops);
104 int ad7606_remove(struct ad7606_state *st);
105 int ad7606_reset(struct ad7606_state *st);
107 enum ad7606_supported_device_ids {
113 int ad7606_scan_from_ring(struct ad7606_state *st, unsigned ch);
114 int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev);
115 void ad7606_ring_cleanup(struct iio_dev *indio_dev);
116 #endif /* IIO_ADC_AD7606_H_ */