[PATCH v2 1/4] dt-bindings: i2c: Add Maxim MAX735x/MAX736x variants

[Patrick Rudolph <patrick.rudolph@9elements.com>]

Add the Maxim MAX735x/MAX736x as supported chip and give an example
how to use it. The functionality will be provided by the exisintg
pca954x driver.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
---
 .../bindings/i2c/i2c-mux-max735x.yaml         | 101 ++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-mux-max735x.yaml

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mux-max735x.yaml b/Documentation/devicetree/bindings/i2c/i2c-mux-max735x.yaml
new file mode 100644
index 000000000000..dc924ec934ca
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-mux-max735x.yaml
@@ -0,0 +1,101 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mux-max735x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX735x/MAX736x I2C bus switch
+
+maintainers:
+  - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+
+description:
+  The binding supports Maxim MAX735x and MAX736x I2C mux/switch devices.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-mux.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - maxim,max7367
+              - maxim,max7369
+    then:
+      properties:
+        interrupts: true
+
+        "#interrupt-cells":
+          const: 2
+
+        interrupt-controller: true
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - maxim,max7356
+          - maxim,max7357
+          - maxim,max7358
+          - maxim,max7367
+          - maxim,max7368
+          - maxim,max7369
+
+  reg:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  i2c-mux-idle-disconnect:
+    type: boolean
+    description: Forces mux to disconnect all children in idle state. This is
+      necessary for example, if there are several multiplexers on the bus and
+      the devices behind them use same I2C addresses.
+
+  idle-state:
+    description: if present, overrides i2c-mux-idle-disconnect
+    $ref: /schemas/mux/mux-controller.yaml#/properties/idle-state
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        i2c-mux@74 {
+            compatible = "maxim,max7357";
+            #address-cells = <1>;
+            #size-cells = <0>;
+            reg = <0x74>;
+
+            i2c@1 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <1>;
+
+                eeprom@54 {
+                    compatible = "atmel,24c08";
+                    reg = <0x54>;
+                };
+            };
+
+            i2c@7 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <7>;
+
+                rtc@51 {
+                    compatible = "nxp,pcf8563";
+                    reg = <0x51>;
+                };
+            };
+        };
+    };
+...
-- 
2.33.1