[PATCH 1/7] dt-bindings: iio: adc: Add support for QCOM PMIC5 Gen4 ADC

[Jishnu Prakash]

PMIC5 Gen4 ADC is similar to PMIC5 Gen3 ADC, with several changes made for
improved performance, mostly at the hardware level. The main differences are
increased ratiometric conversion resolution (from 14 bits to 16 bits) and
increased bit field width for PMIC SID (to allow communication with an
increased number of PMICs, supported on latest SoCs).

Signed-off-by: Jishnu Prakash <jishnu.prakash@xxxxxxxxxxxxxxxx>
---
 .../bindings/iio/adc/qcom,spmi-adc5-gen3.yaml      | 47 +++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-adc5-gen3.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-adc5-gen3.yaml
index 149f4af8f4b8..e79ddc2acca0 100644
--- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-adc5-gen3.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-adc5-gen3.yaml
@@ -21,9 +21,14 @@ description: |
   All boards using a particular (SOC + master PMIC) combination will have the
   same number of ADC SDAMs supported on that PMIC.
 
+  PMIC5 Gen4 ADC is similar to Gen3 ADC, with some differences such as
+  improved ratiometric conversion resolution.
+
 properties:
   compatible:
-    const: qcom,spmi-adc5-gen3
+    enum:
+      - qcom,spmi-adc5-gen3
+      - qcom,spmi-adc5-gen4
 
   reg:
     items:
@@ -83,6 +88,46 @@ patternProperties:
           This property indicates ADC_TM monitoring is done on this channel.
         type: boolean
 
+      qcom,adc5-gen4:
+        description:
+          Indicates channel is of type ADC5 Gen4. This may be needed in cases where the
+          master PMIC has an ADC peripheral of type Gen3, but some of the other PMICs it
+          communicates with have ADC peripherals of type Gen4, so channels of those PMICs
+          need to be marked as Gen4 to ensure their conversions are handled correctly.
+        type: boolean
+
+      qcom,adc5-gen3:
+        description:
+          Indicates channel is of type ADC5 Gen3. This may be needed in cases where the
+          master PMIC has an ADC peripheral of type Gen4, but some of the other PMICs
+          under it have ADC peripherals of type Gen3.
+        type: boolean
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,spmi-adc5-gen4
+
+    then:
+      patternProperties:
+        "^channel@[0-9a-f]+$":
+          properties:
+            qcom,adc5-gen4: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,spmi-adc5-gen3
+
+    then:
+      patternProperties:
+        "^channel@[0-9a-f]+$":
+          properties:
+            qcom,adc5-gen3: false
+
 required:
   - compatible
   - reg

-- 
2.43.0