[PATCH v6 2/2] dt-bindings: rtc: add max313xx RTCs

[Chris Packham <chris.packham@alliedtelesis.co.nz>]

From: Ibrahim Tilki <Ibrahim.Tilki@analog.com>

Devicetree binding documentation for Analog Devices MAX313XX RTCs

Signed-off-by: Ibrahim Tilki <Ibrahim.Tilki@analog.com>
Signed-off-by: Zeynep Arslanbenzer <Zeynep.Arslanbenzer@analog.com>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
---
 .../devicetree/bindings/rtc/adi,max313xx.yaml | 145 ++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/adi,max313xx.yaml

diff --git a/Documentation/devicetree/bindings/rtc/adi,max313xx.yaml b/Documentation/devicetree/bindings/rtc/adi,max313xx.yaml
new file mode 100644
index 000000000000..ccfb0cbfb045
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/adi,max313xx.yaml
@@ -0,0 +1,145 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2022 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/adi,max313xx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices MAX313XX series I2C RTCs
+
+maintainers:
+  - Chris Packham <chris.packham@alliedtelesis.co.nz>
+
+description: Analog Devices MAX313XX series I2C RTCs.
+
+properties:
+  compatible:
+    enum:
+      - adi,max31328
+      - adi,max31329
+      - adi,max31331
+      - adi,max31334
+      - adi,max31341
+      - adi,max31342
+      - adi,max31343
+
+  reg:
+    description: I2C address of the RTC
+    items:
+      - enum: [0x68, 0x69]
+
+  interrupts:
+    description:
+      Alarm1 interrupt line of the RTC. Some of the RTCs have two interrupt
+      lines and alarm1 interrupt muxing depends on the clockin/clockout
+      configuration.
+    maxItems: 1
+
+  "#clock-cells":
+    description:
+      RTC can be used as a clock source through its clock output pin when
+      supplied.
+    const: 0
+
+  clocks:
+    description:
+      RTC uses this clock for clock input when supplied. Clock has to provide
+      one of these four frequencies - 1Hz, 50Hz, 60Hz or 32.768kHz.
+    maxItems: 1
+
+  adi,tc-diode:
+    description:
+      Select the diode configuration for the trickle charger.
+      schottky - Schottky diode in series.
+      standard+schottky - standard diode + Schottky diode in series.
+    enum: [schottky, standard+schottky]
+
+  trickle-resistor-ohms:
+    description: Selected resistor for trickle charger.
+    enum: [3000, 6000, 11000]
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: rtc.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - adi,max31328
+              - adi,max31342
+
+    then:
+      properties:
+        aux-voltage-chargeable: false
+        trickle-resistor-ohms: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - adi,max31328
+              - adi,max31331
+              - adi,max31334
+              - adi,max31343
+
+    then:
+      properties:
+        clocks: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - adi,max31341
+              - adi,max31342
+
+    then:
+      properties:
+        reg:
+          items:
+            - const: 0x69
+
+    else:
+      properties:
+        reg:
+          items:
+            - const: 0x68
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc@68 {
+            reg = <0x68>;
+            compatible = "adi,max31329";
+            clocks = <&clkin>;
+            interrupt-parent = <&gpio>;
+            interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
+            aux-voltage-chargeable = <1>;
+            trickle-resistor-ohms = <6000>;
+            adi,tc-diode = "schottky";
+        };
+    };
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc@68 {
+            reg = <0x68>;
+            compatible = "adi,max31331";
+            #clock-cells = <0>;
+        };
+    };
-- 
2.43.0