projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b9618c0c MH |
1 | /* |
| 2 | * AD7606 ADC driver | |
| 3 | * | |
| 4 | * Copyright 2011 Analog Devices Inc. | |
| 5 | * | |
| 6 | * Licensed under the GPL-2. | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef IIO_ADC_AD7606_H_ | |
| 10 | #define IIO_ADC_AD7606_H_ | |
| 11 | ||
| 12 | /* | |
| 13 | * TODO: struct ad7606_platform_data needs to go into include/linux/iio | |
| 14 | */ | |
| 15 | ||
| 16 | /** | |
| e3c5be2b | 17 | * struct ad7606_platform_data - platform/board specific information |
| b9618c0c MH |
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 | |
| 28 | */ | |
| 29 | ||
| 30 | struct ad7606_platform_data { | |
| 51fadb98 AS |
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; | |
| b9618c0c MH |
41 | }; |
| 42 | ||
| 43 | /** | |
| e3c5be2b | 44 | * struct ad7606_chip_info - chip specific information |
| 3f79410c | 45 | * @name: identification string for chip |
| 1caf7cb4 MH |
46 | * @channels: channel specification |
| 47 | * @num_channels: number of channels | |
| b9618c0c MH |
48 | */ |
| 49 | ||
| 50 | struct ad7606_chip_info { | |
| 13cfac20 | 51 | const char *name; |
| f4e4b955 | 52 | const struct iio_chan_spec *channels; |
| 51fadb98 | 53 | unsigned int num_channels; |
| b9618c0c MH |
54 | }; |
| 55 | ||
| 56 | /** | |
| 57 | * struct ad7606_state - driver instance specific data | |
| 58 | */ | |
| 59 | ||
| 60 | struct ad7606_state { | |
| b9618c0c MH |
61 | struct device *dev; |
| 62 | const struct ad7606_chip_info *chip_info; | |
| 63 | struct ad7606_platform_data *pdata; | |
| 64 | struct regulator *reg; | |
| 65 | struct work_struct poll_work; | |
| 66 | wait_queue_head_t wq_data_avail; | |
| b9618c0c | 67 | const struct ad7606_bus_ops *bops; |
| 51fadb98 AS |
68 | unsigned int range; |
| 69 | unsigned int oversampling; | |
| b9618c0c | 70 | bool done; |
| b9618c0c MH |
71 | void __iomem *base_address; |
| 72 | ||
| 73 | /* | |
| 74 | * DMA (thus cache coherency maintenance) requires the | |
| 75 | * transfer buffers to live in their own cache lines. | |
| 76 | */ | |
| 77 | ||
| 78 | unsigned short data[8] ____cacheline_aligned; | |
| 79 | }; | |
| 80 | ||
| 81 | struct ad7606_bus_ops { | |
| 82 | /* more methods added in future? */ | |
| 83 | int (*read_block)(struct device *, int, void *); | |
| 84 | }; | |
| 85 | ||
| e61181d0 | 86 | struct iio_dev *ad7606_probe(struct device *dev, int irq, |
| 51fadb98 | 87 | void __iomem *base_address, unsigned int id, |
| b9618c0c | 88 | const struct ad7606_bus_ops *bops); |
| 8cbb36a0 | 89 | int ad7606_remove(struct iio_dev *indio_dev, int irq); |
| b9618c0c MH |
90 | int ad7606_reset(struct ad7606_state *st); |
| 91 | ||
| 92 | enum ad7606_supported_device_ids { | |
| 93 | ID_AD7606_8, | |
| 94 | ID_AD7606_6, | |
| 95 | ID_AD7606_4 | |
| 96 | }; | |
| 97 | ||
| b9618c0c MH |
98 | int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev); |
| 99 | void ad7606_ring_cleanup(struct iio_dev *indio_dev); | |
| 2c3a5236 LPC |
100 | |
| 101 | #ifdef CONFIG_PM_SLEEP | |
| 102 | extern const struct dev_pm_ops ad7606_pm_ops; | |
| 103 | #define AD7606_PM_OPS (&ad7606_pm_ops) | |
| 104 | #else | |
| 105 | #define AD7606_PM_OPS NULL | |
| 106 | #endif | |
| 107 | ||
| b9618c0c | 108 | #endif /* IIO_ADC_AD7606_H_ */ |