[PATCH 02/22] dt-bindings: iio: dac: ad5696: add reset/ldac/gain gpio support

[Rodrigo Alencar via B4 Relay]

From: Rodrigo Alencar <rodrigo.alencar@xxxxxxxxxx>

Add GPIO property for RESET, LDAC and GAIN pin. RESET is active-low, LDAC
is used to load DAC channels with values from input registers and GAIN
can double the voltage in output channels. The gain-gpios property is
not available to all supported parts.

Signed-off-by: Rodrigo Alencar <rodrigo.alencar@xxxxxxxxxx>
---
 .../devicetree/bindings/iio/dac/adi,ad5696.yaml    | 34 +++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad5696.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad5696.yaml
index ed79323bfc93..f286e5072abc 100644
--- a/Documentation/devicetree/bindings/iio/dac/adi,ad5696.yaml
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ad5696.yaml
@@ -42,14 +42,45 @@ properties:
     description: |
       The regulator supply for DAC reference voltage.
 
+  reset-gpios:
+    description: Active-low RESET pin to reset the device.
+    maxItems: 1
+
+  ldac-gpios:
+    description:
+      Active-low LDAC pin used to asynchronously update the DAC channels.
+    maxItems: 1
+
+  gain-gpios:
+    description:
+      GAIN pin that sets a multiplier for the DAC output voltage. When high,
+      the DAC output voltage is multiplied by 2, otherwise it is unchanged.
+    maxItems: 1
+
 required:
   - compatible
   - reg
 
-additionalProperties: false
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            anyOf:
+              - const: adi,ad5311r
+              - const: adi,ad5691r
+              - const: adi,ad5692r
+              - const: adi,ad5693
+              - const: adi,ad5693r
+    then:
+      properties:
+        gain-gpios: false
+
+unevaluatedProperties: false
 
 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
     i2c {
       #address-cells = <1>;
       #size-cells = <0>;
@@ -58,6 +89,7 @@ examples:
         compatible = "adi,ad5696";
         reg = <0>;
         vcc-supply = <&dac_vref>;
+        ldac-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
       };
     };
 ...

-- 
2.43.0