1/*
2 * AD7780/AD7781 SPI ADC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8#ifndef IIO_ADC_AD7780_H_
9#define IIO_ADC_AD7780_H_
10
11/*
12 * TODO: struct ad7780_platform_data needs to go into include/linux/iio
13 */
14
15/* NOTE:
16 * The AD7780 doesn't feature a dedicated SPI chip select, in addition it
17 * features a dual use data out ready DOUT/RDY output.
18 * In order to avoid contentions on the SPI bus, it's therefore necessary
19 * to use spi bus locking combined with a dedicated GPIO to control the
20 * power down reset signal of the AD7780.
21 *
22 * The DOUT/RDY output must also be wired to an interrupt capable GPIO.
23 */
24
25struct ad7780_platform_data {
26	u16				vref_mv;
27	int				gpio_pdrst;
28};
29
30#endif /* IIO_ADC_AD7780_H_ */
31