linux-kernel - [PATCH V3] dt-bindings: timer: Convert i.MX GPT to json-schema

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Date:   Fri, 29 May 2020 10:04:42 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     daniel.lezcano@...aro.org, tglx@...utronix.de, robh+dt@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     Linux-imx@....com
Subject: [PATCH V3] dt-bindings: timer: Convert i.MX GPT to json-schema

Convert the i.MX GPT binding to DT schema format using json-schema.

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
Changes since V2:
	- in compatible properties, group all the ones with the same
	  fallback to a single 'items' list using enum for the first entry.
---
 .../devicetree/bindings/timer/fsl,imxgpt.txt       | 45 --------------
 .../devicetree/bindings/timer/fsl,imxgpt.yaml      | 72 ++++++++++++++++++++++
 2 files changed, 72 insertions(+), 45 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
 create mode 100644 Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml

diff --git a/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt b/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
deleted file mode 100644
index 5d8fd5b..0000000
--- a/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
+++ /dev/null
@@ -1,45 +0,0 @@
-Freescale i.MX General Purpose Timer (GPT)
-
-Required properties:
-
-- compatible : should be one of following:
-  for i.MX1:
-  - "fsl,imx1-gpt";
-  for i.MX21:
-  - "fsl,imx21-gpt";
-  for i.MX27:
-  - "fsl,imx27-gpt", "fsl,imx21-gpt";
-  for i.MX31:
-  - "fsl,imx31-gpt";
-  for i.MX25:
-  - "fsl,imx25-gpt", "fsl,imx31-gpt";
-  for i.MX50:
-  - "fsl,imx50-gpt", "fsl,imx31-gpt";
-  for i.MX51:
-  - "fsl,imx51-gpt", "fsl,imx31-gpt";
-  for i.MX53:
-  - "fsl,imx53-gpt", "fsl,imx31-gpt";
-  for i.MX6Q:
-  - "fsl,imx6q-gpt", "fsl,imx31-gpt";
-  for i.MX6DL:
-  - "fsl,imx6dl-gpt";
-  for i.MX6SL:
-  - "fsl,imx6sl-gpt", "fsl,imx6dl-gpt";
-  for i.MX6SX:
-  - "fsl,imx6sx-gpt", "fsl,imx6dl-gpt";
-- reg : specifies base physical address and size of the registers.
-- interrupts : should be the gpt interrupt.
-- clocks : the clocks provided by the SoC to drive the timer, must contain
-           an entry for each entry in clock-names.
-- clock-names : must include "ipg" entry first, then "per" entry.
-
-Example:
-
-gpt1: timer@...03000 {
-	compatible = "fsl,imx27-gpt", "fsl,imx21-gpt";
-	reg = <0x10003000 0x1000>;
-	interrupts = <26>;
-	clocks = <&clks IMX27_CLK_GPT1_IPG_GATE>,
-		 <&clks IMX27_CLK_PER1_GATE>;
-	clock-names = "ipg", "per";
-};
diff --git a/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml b/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
new file mode 100644
index 0000000..883f7f4
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/fsl,imxgpt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX General Purpose Timer (GPT)
+
+maintainers:
+  - Sascha Hauer <s.hauer@...gutronix.de>
+
+properties:
+  compatible:
+    oneOf:
+      - const: fsl,imx1-gpt
+      - const: fsl,imx21-gpt
+      - items:
+          - const: fsl,imx27-gpt
+          - const: fsl,imx21-gpt
+      - const: fsl,imx31-gpt
+      - items:
+          - enum:
+            - fsl,imx25-gpt
+            - fsl,imx50-gpt
+            - fsl,imx51-gpt
+            - fsl,imx53-gpt
+            - fsl,imx6q-gpt
+          - const: fsl,imx31-gpt
+      - const: fsl,imx6dl-gpt
+      - items:
+          - enum:
+            - fsl,imx6sl-gpt
+            - fsl,imx6sx-gpt
+          - const: fsl,imx6dl-gpt
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: SoC GPT ipg clock
+      - description: SoC GPT per clock
+
+  clock-names:
+    items:
+      - const: ipg
+      - const: per
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx27-clock.h>
+
+    timer@...03000 {
+        compatible = "fsl,imx27-gpt", "fsl,imx21-gpt";
+        reg = <0x10003000 0x1000>;
+        interrupts = <26>;
+        clocks = <&clks IMX27_CLK_GPT1_IPG_GATE>,
+                 <&clks IMX27_CLK_PER1_GATE>;
+        clock-names = "ipg", "per";
+    };
-- 
2.7.4