How to control SPI registers without using IIO related tools

In your devicetree under the spi bus, where you have a node with:

compatible = "adi,ad9695";

Replace it with 

compatible = "rohm,dh2228fv";

This will instantiate the spidev driver and you should be able to control it from userland.

-Michael

Hi Michael,

Thanks for answering. But if I change that line, does it affect the original function that using spi to do configuration of ad9695? Because I observe in that section, we use spi to control some important jesd parameters.

You can only bind one or the other. It's not possible to bind two drivers to the same spi bus device.

Hi Michael,

Ok, I see. Then is there any other way to read/write spi registers without using the iio tools?

I don't see how that would make a difference.

But you could change your HDL and AND another SPI chip select on that same spi bus.

This way you could bind spidev to that other chip select.

-Michael

Hi Michael,

I see, that's a good suggestion. I'll try that.

Thanks.