[PATCH v2 2/2] devicetree bindings I2C Add bindings doc for Sunplus SP7021

[LH.Kuo]

Add devicetree bindings I2C Add bindings doc for Sunplus SP7021

Signed-off-by: LH.Kuo <lh.kuo@xxxxxxxxxxx>
---
Changes in v2:
 - Addressed all comments from Mr. Rob Herring.
 - Modified the structure and register access method.
 - Modifiedthe path about MAINTAINERS. ( wrong messages PATH in v1).
 - Modifiedthe the YAML file.

 .../devicetree/bindings/i2c/i2c-sunplus.yaml       | 82 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 83 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml

diff --git a/Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml b/Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml
new file mode 100644
index 0000000..af860ee
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (C) Sunplus Co., Ltd. 2021
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-sunplus.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sunplus's I2C controller
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+maintainers:
+  - lh.kuo <lh.kuo@xxxxxxxxxxx>
+
+properties:
+  compatible:
+    enum:
+      - sunplus,sp7021-i2cm
+      - sunplus,q645-i2cm
+
+  reg:
+    items:
+      - description: Base address and length of the I2C registers
+      - description: Base address and length of the I2C DMA registers
+
+  reg-names:
+    items:
+      - const: i2cm
+      - const: i2cmdma
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  clock-frequency:
+    enum: [ 100000, 400000 ]
+
+  pinctrl-names:
+    description:
+      A pinctrl state named "default" must be defined.
+    const: default
+
+  pinctrl-0:
+    description:
+      A phandle to the default pinctrl state.
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - clocks
+  - resets
+  - pinctrl-names
+  - pinctrl-0
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sp-sp7021.h>
+    #include <dt-bindings/reset/sp-sp7021.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c@9C004600 {
+        compatible = "sunplus,sp7021-i2cm";
+        reg = <0x9c004600 0x80>, <0x9c004680 0x80>;
+        reg-names = "i2cm", "i2cmdma";
+        interrupt-parent = <&intc>;
+        interrupts = <174 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clkc I2CM0>;
+        resets = <&rstc RST_I2CM0>;
+        clock-frequency = <100000>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&i2cm0_pins>;
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 5b7a8a2..575a8e0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18193,6 +18193,7 @@ SUNPLUS I2C CONTROLLER INTERFACE DRIVER
 M:	LH Kuo <lh.kuo@xxxxxxxxxxx>
 L:	linux-i2c@xxxxxxxxxxxxxxx
 S:	Maintained
+F:	Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml
 F:	drivers/i2c/busses/i2c-sunplus.c
 
 SUPERH
-- 
2.7.4