diff options
Diffstat (limited to 'kernel/drivers/staging/iio/adc/ad7780.h')
-rw-r--r-- | kernel/drivers/staging/iio/adc/ad7780.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/drivers/staging/iio/adc/ad7780.h b/kernel/drivers/staging/iio/adc/ad7780.h new file mode 100644 index 000000000..67e511c3d --- /dev/null +++ b/kernel/drivers/staging/iio/adc/ad7780.h @@ -0,0 +1,30 @@ +/* + * 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_ */ |