[PATCH v3 8/8] dt-bindings: Add max12xx SPI ADC series as trivial devices

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

Update the compatible list with three Maxim ADCs compatibles.

Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
 .../bindings/iio/adc/max1027-adc.txt          | 28 +++++++++++++++++++
 .../devicetree/bindings/trivial-devices.yaml  |  6 ++++
 2 files changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/max1027-adc.txt

diff --git a/Documentation/devicetree/bindings/iio/adc/max1027-adc.txt b/Documentation/devicetree/bindings/iio/adc/max1027-adc.txt
new file mode 100644
index 000000000000..1b703a01d882
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/max1027-adc.txt
@@ -0,0 +1,28 @@
+* Maxim 1027/1029/1031/1227/1229/1231 Analog to Digital Converter (ADC)
+
+Required properties:
+  - compatible: Should be one of:
+    * "maxim,max1027"
+    * "maxim,max1029"
+    * "maxim,max1031"
+    * "maxim,max1227"
+    * "maxim,max1229"
+    * "maxim,max1231"
+  - reg: SPI chip select number for the device
+
+Optional properties:
+  - interrupts: IRQ line for the ADC
+  see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+
+Recommended properties:
+- spi-max-frequency: Definition as per
+                     Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Example:
+adc@0 {
+	compatible = "maxim,max1027";
+	reg = <0>;
+	interrupt-parent = <&gpio5>;
+	interrupts = <15 IRQ_TYPE_EDGE_RISING>;
+	spi-max-frequency = <1000000>;
+};
diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
index e0095ecb472f..765fd1c170df 100644
--- a/Documentation/devicetree/bindings/trivial-devices.yaml
+++ b/Documentation/devicetree/bindings/trivial-devices.yaml
@@ -120,6 +120,12 @@ properties:
           - maxim,max1029
             # 10-bit 16 channels 300ks/s SPI ADC with temperature sensor
           - maxim,max1031
+            # 12-bit 8 channels 300ks/s SPI ADC with temperature sensor
+          - maxim,max1227
+            # 12-bit 12 channels 300ks/s SPI ADC with temperature sensor
+          - maxim,max1229
+            # 12-bit 16 channels 300ks/s SPI ADC with temperature sensor
+          - maxim,max1231
             # Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
           - maxim,max1237
             # PECI-to-I2C translator for PECI-to-SMBus/I2C protocol conversion
-- 
2.20.1