Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / staging / iio / adc / ad7606.h
blob35018c3f518efc59502e057057b4b5c7bd48d0b6
1 /*
2 * AD7606 ADC driver
4 * Copyright 2011 Analog Devices Inc.
6 * Licensed under the GPL-2.
7 */
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
16 /**
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 {
31 unsigned default_os;
32 unsigned default_range;
33 unsigned gpio_convst;
34 unsigned gpio_reset;
35 unsigned gpio_range;
36 unsigned gpio_os0;
37 unsigned gpio_os1;
38 unsigned gpio_os2;
39 unsigned gpio_frstdata;
40 unsigned gpio_stby;
43 /**
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 {
52 const char *name;
53 u16 int_vref_mv;
54 struct iio_chan_spec *channels;
55 unsigned num_channels;
58 /**
59 * struct ad7606_state - driver instance specific data
62 struct ad7606_state {
63 struct device *dev;
64 const struct ad7606_chip_info *chip_info;
65 struct ad7606_platform_data *pdata;
66 struct regulator *reg;
67 struct work_struct poll_work;
68 wait_queue_head_t wq_data_avail;
69 const struct ad7606_bus_ops *bops;
70 unsigned range;
71 unsigned oversampling;
72 bool done;
73 void __iomem *base_address;
76 * DMA (thus cache coherency maintenance) requires the
77 * transfer buffers to live in their own cache lines.
80 unsigned short data[8] ____cacheline_aligned;
83 struct ad7606_bus_ops {
84 /* more methods added in future? */
85 int (*read_block)(struct device *, int, void *);
88 void ad7606_suspend(struct iio_dev *indio_dev);
89 void ad7606_resume(struct iio_dev *indio_dev);
90 struct iio_dev *ad7606_probe(struct device *dev, int irq,
91 void __iomem *base_address, unsigned id,
92 const struct ad7606_bus_ops *bops);
93 int ad7606_remove(struct iio_dev *indio_dev, int irq);
94 int ad7606_reset(struct ad7606_state *st);
96 enum ad7606_supported_device_ids {
97 ID_AD7606_8,
98 ID_AD7606_6,
99 ID_AD7606_4
102 int ad7606_scan_from_ring(struct iio_dev *indio_dev, unsigned ch);
103 int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev);
104 void ad7606_ring_cleanup(struct iio_dev *indio_dev);
105 #endif /* IIO_ADC_AD7606_H_ */