73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*
|
|
* 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 {
|
|
u16 int_vref_mv;
|
|
struct iio_chan_spec channel[2];
|
|
};
|
|
|
|
struct ad7476_state {
|
|
struct spi_device *spi;
|
|
const struct ad7476_chip_info *chip_info;
|
|
struct regulator *reg;
|
|
size_t d_size;
|
|
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_BUFFER
|
|
int ad7476_scan_from_ring(struct iio_dev *indio_dev);
|
|
int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev);
|
|
void ad7476_ring_cleanup(struct iio_dev *indio_dev);
|
|
#else /* CONFIG_IIO_BUFFER */
|
|
static inline int ad7476_scan_from_ring(struct iio_dev *indio_dev)
|
|
{
|
|
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_BUFFER */
|
|
#endif /* IIO_ADC_AD7476_H_ */
|