[PATCH v2 1/4] dt-bindings: iio: adc: amlogic,meson-saradc: add S4 compatible

[Nick Xie]

Add the compatible string for the SARADC (Successive Approximation
Register ADC) IP block found in the Amlogic Meson S4 SoC.

There are no known differences between the SARADC on S4 and the one
on G12A. Therefore, it uses "amlogic,meson-g12a-saradc" as a proper
specific fallback.

Signed-off-by: Nick Xie <nick@xxxxxxxxxx>
---
 .../devicetree/bindings/iio/adc/amlogic,meson-saradc.yaml     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.yaml b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.yaml
index bb9825e7346dd..70ab4e140e71b 100644
--- a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.yaml
@@ -27,7 +27,11 @@ properties:
               - amlogic,meson-gxm-saradc
               - amlogic,meson-axg-saradc
               - amlogic,meson-g12a-saradc
+          # Usage of this generic fallback is not allowed for new devices
           - const: amlogic,meson-saradc
+      - items:
+          - const: amlogic,meson-s4-saradc
+          - const: amlogic,meson-g12a-saradc
 
   reg:
     maxItems: 1
-- 
2.34.1