![Michael Hennerich](/assets/img/avatar_default.png)
Changes since v1: IIO: ADC: AD7780: Apply review feedback Abort probe() with error in case platform_data is not present. Add comment explaining power down reset (PDRST) GPIO handling and dual function DOUT/RDY interrupt usage. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
31 lines
753 B
C
31 lines
753 B
C
/*
|
|
* AD7780/AD7781 SPI ADC driver
|
|
*
|
|
* Copyright 2011 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2.
|
|
*/
|
|
#ifndef IIO_ADC_AD7780_H_
|
|
#define IIO_ADC_AD7780_H_
|
|
|
|
/*
|
|
* TODO: struct ad7780_platform_data needs to go into include/linux/iio
|
|
*/
|
|
|
|
/* NOTE:
|
|
* The AD7780 doesn't feature a dedicated SPI chip select, in addition it
|
|
* features a dual use data out ready DOUT/RDY output.
|
|
* In order to avoid contentions on the SPI bus, it's therefore necessary
|
|
* to use spi bus locking combined with a dedicated GPIO to control the
|
|
* power down reset signal of the AD7780.
|
|
*
|
|
* The DOUT/RDY output must also be wired to an interrupt capable GPIO.
|
|
*/
|
|
|
|
struct ad7780_platform_data {
|
|
u16 vref_mv;
|
|
int gpio_pdrst;
|
|
};
|
|
|
|
#endif /* IIO_ADC_AD7780_H_ */
|