[PATCH 1/2] dt-bindings: rtc: max31335: add max31335 bindings

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Document the Analog Devices MAX31335 device tree bindings.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx>
---
 .../devicetree/bindings/rtc/adi,max31335.yaml | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/adi,max31335.yaml

diff --git a/Documentation/devicetree/bindings/rtc/adi,max31335.yaml b/Documentation/devicetree/bindings/rtc/adi,max31335.yaml
new file mode 100644
index 000000000000..b84be0fa34ef
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/adi,max31335.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/adi,max31335.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices MAX31335 RTC Device Tree Bindings
+
+allOf:
+  - $ref: rtc.yaml#
+
+maintainers:
+  - Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx>
+
+description: Analog Devices MAX31335 I2C RTC
+
+properties:
+  compatible:
+    const: adi,max31335
+
+  reg:
+    description: I2C address of the RTC
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#clock-cells":
+    description:
+      RTC can be used as a clock source through its clock output pin.
+    const: 0
+
+  trickle-resistor-ohms:
+    description: Selected resistor for trickle charger.
+    enum: [3000, 6000, 11000]
+
+  trickle-diode-enable: true
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc@68 {
+            compatible = "adi,max31335";
+            reg = <0x68>;
+            pinctrl-0 = <&rtc_nint_pins>;
+            interrupts-extended = <&gpio1 16 IRQ_TYPE_LEVEL_HIGH>;
+            trickle-resistor-ohms = <6000>;
+            trickle-diode-enable;
+        };
+    };
+...
-- 
2.42.0




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