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 specific 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 int default_os;
32 unsigned int default_range;
33 unsigned int gpio_convst;
34 unsigned int gpio_reset;
35 unsigned int gpio_range;
36 unsigned int gpio_os0;
37 unsigned int gpio_os1;
38 unsigned int gpio_os2;
39 unsigned int gpio_frstdata;
40 unsigned int gpio_stby;
44 * struct ad7606_chip_info - chip specific information
45 * @name: identification string for chip
46 * @channels: channel specification
47 * @num_channels: number of channels
50 struct ad7606_chip_info {
51 const struct iio_chan_spec *channels;
52 unsigned int num_channels;
56 * struct ad7606_state - driver instance specific data
61 const struct ad7606_chip_info *chip_info;
62 struct ad7606_platform_data *pdata;
63 struct regulator *reg;
64 struct work_struct poll_work;
65 wait_queue_head_t wq_data_avail;
66 const struct ad7606_bus_ops *bops;
68 unsigned int oversampling;
70 void __iomem *base_address;
73 * DMA (thus cache coherency maintenance) requires the
74 * transfer buffers to live in their own cache lines.
77 unsigned short data[8] ____cacheline_aligned;
80 struct ad7606_bus_ops {
81 /* more methods added in future? */
82 int (*read_block)(struct device *, int, void *);
85 struct iio_dev *ad7606_probe(struct device *dev, int irq,
86 void __iomem *base_address,
87 const char *name, unsigned int id,
88 const struct ad7606_bus_ops *bops);
89 int ad7606_remove(struct iio_dev *indio_dev, int irq);
90 int ad7606_reset(struct ad7606_state *st);
92 enum ad7606_supported_device_ids {
98 int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev);
99 void ad7606_ring_cleanup(struct iio_dev *indio_dev);
101 #ifdef CONFIG_PM_SLEEP
102 extern const struct dev_pm_ops ad7606_pm_ops;
103 #define AD7606_PM_OPS (&ad7606_pm_ops)
105 #define AD7606_PM_OPS NULL
108 #endif /* IIO_ADC_AD7606_H_ */