linux-kernel - [PATCH V3 1/2] dt-bindings: i2c: Convert mxs i2c to json-schema

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Date:   Tue, 16 Jun 2020 11:50:53 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     linux@...pel-privat.de, kernel@...gutronix.de, robh+dt@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, festevam@...il.com,
        wolfram@...-dreams.de, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH V3 1/2] dt-bindings: i2c: Convert mxs i2c to json-schema

Convert the MXS I2C binding to DT schema format using json-schema

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
Changes since V2:
	- remove 'clock-frequency' property's typs and use enum for it, as it ONLY support 100KHz/400KHz.
---
 Documentation/devicetree/bindings/i2c/i2c-mxs.txt  | 25 -----------
 Documentation/devicetree/bindings/i2c/i2c-mxs.yaml | 51 ++++++++++++++++++++++
 2 files changed, 51 insertions(+), 25 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-mxs.txt
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-mxs.yaml

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mxs.txt b/Documentation/devicetree/bindings/i2c/i2c-mxs.txt
deleted file mode 100644
index 4e1c8ac..0000000
--- a/Documentation/devicetree/bindings/i2c/i2c-mxs.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-* Freescale MXS Inter IC (I2C) Controller
-
-Required properties:
-- compatible: Should be "fsl,<chip>-i2c"
-- reg: Should contain registers location and length
-- interrupts: Should contain ERROR interrupt number
-- clock-frequency: Desired I2C bus clock frequency in Hz.
-                   Only 100000Hz and 400000Hz modes are supported.
-- dmas: DMA specifier, consisting of a phandle to DMA controller node
-  and I2C DMA channel ID.
-  Refer to dma.txt and fsl-mxs-dma.txt for details.
-- dma-names: Must be "rx-tx".
-
-Examples:
-
-i2c0: i2c@...58000 {
-	#address-cells = <1>;
-	#size-cells = <0>;
-	compatible = "fsl,imx28-i2c";
-	reg = <0x80058000 2000>;
-	interrupts = <111>;
-	clock-frequency = <100000>;
-	dmas = <&dma_apbx 6>;
-	dma-names = "rx-tx";
-};
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mxs.yaml b/Documentation/devicetree/bindings/i2c/i2c-mxs.yaml
new file mode 100644
index 0000000..d3134ed
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-mxs.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-mxs.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MXS Inter IC (I2C) Controller
+
+maintainers:
+  - Shawn Guo <shawn.guo@...aro.org>
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx23-i2c
+      - fsl,imx28-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-frequency:
+    enum: [ 100000, 400000 ]
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    const: rx-tx
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - dmas
+  - dma-names
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c@...58000 {
+        compatible = "fsl,imx28-i2c";
+        reg = <0x80058000 2000>;
+        interrupts = <111>;
+        clock-frequency = <100000>;
+        dmas = <&dma_apbx 6>;
+        dma-names = "rx-tx";
+    };
-- 
2.7.4