LXR linux/drivers/staging/iio/adc/ad7780.h

   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