diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad7476.h')
| -rw-r--r-- | drivers/staging/iio/adc/ad7476.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h new file mode 100644 index 0000000..b51b49e --- /dev/null +++ b/drivers/staging/iio/adc/ad7476.h @@ -0,0 +1,77 @@ +/* + * AD7476/5/7/8 (A) SPI ADC driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ +#ifndef IIO_ADC_AD7476_H_ +#define IIO_ADC_AD7476_H_ + +#define RES_MASK(bits) ((1 << (bits)) - 1) + +/* + * TODO: struct ad7476_platform_data needs to go into include/linux/iio + */ + +struct ad7476_platform_data { + u16 vref_mv; +}; + +struct ad7476_chip_info { + u8 bits; + u8 storagebits; + u8 res_shift; + char sign; + u16 int_vref_mv; +}; + +struct ad7476_state { + struct iio_dev *indio_dev; + struct spi_device *spi; + const struct ad7476_chip_info *chip_info; + struct regulator *reg; + struct work_struct poll_work; + atomic_t protect_ring; + u16 int_vref_mv; + struct spi_transfer xfer; + struct spi_message msg; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + unsigned char data[2] ____cacheline_aligned; +}; + +enum ad7476_supported_device_ids { + ID_AD7466, + ID_AD7467, + ID_AD7468, + ID_AD7475, + ID_AD7476, + ID_AD7477, + ID_AD7478, + ID_AD7495 +}; + +#ifdef CONFIG_IIO_RING_BUFFER +int ad7476_scan_from_ring(struct ad7476_state *st); +int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev); +void ad7476_ring_cleanup(struct iio_dev *indio_dev); +#else /* CONFIG_IIO_RING_BUFFER */ +static inline int ad7476_scan_from_ring(struct ad7476_state *st) +{ + return 0; +} + +static inline int +ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline void ad7476_ring_cleanup(struct iio_dev *indio_dev) +{ +} +#endif /* CONFIG_IIO_RING_BUFFER */ +#endif /* IIO_ADC_AD7476_H_ */ |
