| Michael Hennerich | d6f087e | 2011-03-24 19:37:00 +0100 | [diff] [blame] | 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 | |
| 25 | struct ad7780_platform_data { |
| 26 | u16 vref_mv; |
| 27 | int gpio_pdrst; |
| 28 | }; |
| 29 | |
| 30 | #endif /* IIO_ADC_AD7780_H_ */ |