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
{
54 struct iio_chan_spec
*channels
;
55 unsigned num_channels
;
59 * struct ad7606_state - driver instance specific data
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
;
71 unsigned oversampling
;
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
{
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_ */