[PATCH 2/9] dt-bindings: iio: dac: adi-axi-adc: Add ad7606 variant

[Guillaume Stols]

A new compatible is added to reflect the specialized version of the HDL
that is not covered by the IIO backend paradigm: We use the parallel
interface to write the ADC's registers, and accessing this interface
requires to use ADI_AXI_REG_CONFIG_RD,ADI_AXI_REG_CONFIG_WR and
ADI_AXI_REG_CONFIG_CTRL in a custom fashion.

Signed-off-by: Guillaume Stols <gstols@xxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml b/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml
index e1f450b80db2..43bc0440c678 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml
@@ -17,13 +17,20 @@ description: |
   interface for the actual ADC, while this IP core will interface
   to the data-lines of the ADC and handle the streaming of data into
   memory via DMA.
+  In some cases, the AXI ADC interface is used to perform specialized
+  operation to a particular ADC, e.g access the physical bus through
+  some special register to write ADC registers.
+  In this case, a different compatible is used, and the driver behaves
+  slightly differently according to the special needs.
 
   https://wiki.analog.com/resources/fpga/docs/axi_adc_ip
+  http://analogdevicesinc.github.io/hdl/library/axi_ad7606x/index.html
 
 properties:
   compatible:
     enum:
       - adi,axi-adc-10.0.a
+      - adi,axi-ad7606x
 
   reg:
     maxItems: 1

-- 
2.34.1