spi interface support

modulename: ad7606_spi.ko
configname: CONFIG_AD7606_IFACE_SPI

Linux Kernel Configuration
└─> Device Drivers
└─> Staging drivers
└─> IIO staging drivers
└─> Analog to digital converters
└─> SPI support
└─> spi interface support

Say yes here to include parallel interface support on the AD7606
ADC driver.

To compile this driver as a module, choose M here: the
module will be called ad7606_spi.

source code: