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 * @bits: accuracy of the adc in bits
47 * @bits: output coding [s]igned or [u]nsigned
48 * @int_vref_mv: the internal reference voltage
49 * @num_channels: number of physical inputs on chip
52 struct ad7606_chip_info {
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;
72 atomic_t protect_ring;
74 const struct ad7606_bus_ops *bops;
78 unsigned oversampling;
85 void __iomem *base_address;
88 * DMA (thus cache coherency maintenance) requires the
89 * transfer buffers to live in their own cache lines.
92 unsigned short data[8] ____cacheline_aligned;
95 struct ad7606_bus_ops {
96 /* more methods added in future? */
97 int (*read_block)(struct device *, int, void *);
100 void ad7606_suspend(struct ad7606_state *st);
101 void ad7606_resume(struct ad7606_state *st);
102 struct ad7606_state *ad7606_probe(struct device *dev, int irq,
103 void __iomem *base_address, unsigned id,
104 const struct ad7606_bus_ops *bops);
105 int ad7606_remove(struct ad7606_state *st);
106 int ad7606_reset(struct ad7606_state *st);
108 enum ad7606_supported_device_ids {
114 int ad7606_scan_from_ring(struct ad7606_state *st, unsigned ch);
115 int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev);
116 void ad7606_ring_cleanup(struct iio_dev *indio_dev);
117 #endif /* IIO_ADC_AD7606_H_ */