[PATCH v3 2/3] dt-bindings: i2c: Add Novatek NT726xx SoC I2C controller

From: Ben Huang <[email protected]>

Add device tree documentation for Novatek NT726xx SoC I2C controller.

Signed-off-by: Ben Huang <[email protected]>
Signed-off-by: Nina Kuo <[email protected]>
---
 .../bindings/i2c/novatek,nt726xx-i2c.yaml     | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/novatek,nt726xx-i2c.yaml

diff --git a/Documentation/devicetree/bindings/i2c/novatek,nt726xx-i2c.yaml b/Documentation/devicetree/bindings/i2c/novatek,nt726xx-i2c.yaml
new file mode 100644
index 000000000000..866589c5ae51
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/novatek,nt726xx-i2c.yaml
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/novatek,nt726xx-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+maintainers:
+  - Ben Huang <[email protected]>
+  - Jason JJ Wu <[email protected]>
+
+title: Novatek NT726xx Series SoC I2C master controller
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: novatek,nt72600-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-frequency:
+    default: 100000
+    enum: [ 100000, 400000 ]
+
+  novatek,hwmods:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: Name of each i2c pin, must be named with "i2cX". (X is
+                 an integer starting from 0, must be unique)
+
+  novatek,stbc-controllable:
+    type: boolean
+    description: Set if this i2c master, named as `stbc-i2c`, is
+      controllable by stbc (Standby controller, actually is an 8051
+      micro-processor) on Novatek NT726xx SoCs.
+      For these `stbc-i2c`s, the driven clock is only 12 MHz and the
+      authentication to stbc must be executed before controlling the
+      registers.
+
+    default: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - novatek,hwmods
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c0: i2c@10000000 {
+      compatible = "novatek,nt72600-i2c";
+      reg = <0x0 0x10000000 0x0 0x100>;
+      interrupts = <0 67 4>;
+      clock-frequency = <400000>;
+      novatek,hwmods = "i2c0";
+      #address-cells = <2>;
+      #size-cells = <2>;
+    };
+
+    stbc-i2c1: i2c@20000000 {
+      compatible = "novatek,nt72600-i2c";
+      reg = <0x0 0x20000000 0x0 0x100>;
+      interrupts = <0 77 4>;
+      novatek,hwmods = "i2c1";
+      novatek,stbc-controllable;
+      #address-cells = <2>;
+      #size-cells = <2>;
+    };
-- 
2.40.1