linux-kernel - [PATCH V2 2/3] dt-bindings: pinctrl: Convert i.MX8MM to json-schema

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Date:   Fri, 10 Jan 2020 12:05:19 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     aisheng.dong@....com, festevam@...il.com, shawnguo@...nel.org,
        stefan@...er.ch, kernel@...gutronix.de, linus.walleij@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com, s.hauer@...gutronix.de,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH V2 2/3] dt-bindings: pinctrl: Convert i.MX8MM to json-schema

Convert the i.MX8MM pinctrl binding to DT schema format using json-schema

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
Changes since V1:
        - use "grp$" instead of "-grp$";
        - use space instead of tab for "ref$";
	- add missed "reg" property;
        - remove the "maxItem" for "fsl,pins" to avoid build warning, as the item number is changable.
---
 .../bindings/pinctrl/fsl,imx8mm-pinctrl.txt        | 36 -----------
 .../bindings/pinctrl/fsl,imx8mm-pinctrl.yaml       | 69 ++++++++++++++++++++++
 2 files changed, 69 insertions(+), 36 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.txt
 create mode 100644 Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.txt
deleted file mode 100644
index e4e01c0..0000000
--- a/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.txt
+++ /dev/null
@@ -1,36 +0,0 @@
-* Freescale IMX8MM IOMUX Controller
-
-Please refer to fsl,imx-pinctrl.txt and pinctrl-bindings.txt in this directory
-for common binding part and usage.
-
-Required properties:
-- compatible: "fsl,imx8mm-iomuxc"
-- reg: should contain the base physical address and size of the iomuxc
-  registers.
-
-Required properties in sub-nodes:
-- fsl,pins: each entry consists of 6 integers and represents the mux and config
-  setting for one pin.  The first 5 integers <mux_reg conf_reg input_reg mux_val
-  input_val> are specified using a PIN_FUNC_ID macro, which can be found in
-  <arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h>. The last integer CONFIG is
-  the pad setting value like pull-up on this pin.  Please refer to i.MX8M Mini
-  Reference Manual for detailed CONFIG settings.
-
-Examples:
-
-&uart1 {
-       pinctrl-names = "default";
-       pinctrl-0 = <&pinctrl_uart1>;
-};
-
-iomuxc: pinctrl@...30000 {
-        compatible = "fsl,imx8mm-iomuxc";
-        reg = <0x0 0x30330000 0x0 0x10000>;
-
-        pinctrl_uart1: uart1grp {
-                fsl,pins = <
-                        MX8MM_IOMUXC_UART1_RXD_UART1_DCE_RX             0x140
-                        MX8MM_IOMUXC_UART1_TXD_UART1_DCE_TX             0x140
-                >;
-        };
-};
diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.yaml
new file mode 100644
index 0000000..a3c4275
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/fsl,imx8mm-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale IMX8MM IOMUX Controller
+
+maintainers:
+  - Anson Huang <Anson.Huang@....com>
+
+description:
+  Please refer to fsl,imx-pinctrl.txt and pinctrl-bindings.txt in this directory
+  for common binding part and usage.
+
+properties:
+  compatible:
+    const: fsl,imx8mm-iomuxc
+
+  reg:
+    maxItems: 1
+
+# Client device subnode's properties
+patternProperties:
+  'grp$':
+    type: object
+    description:
+      Pinctrl node's client devices use subnodes for desired pin configuration.
+      Client device subnodes use below standard properties.
+
+    properties:
+      fsl,pins:
+        allOf:
+          - $ref: /schemas/types.yaml#/definitions/uint32-array
+        description:
+          each entry consists of 6 integers and represents the mux and config
+          setting for one pin. The first 5 integers <mux_reg conf_reg input_reg
+          mux_val input_val> are specified using a PIN_FUNC_ID macro, which can
+          be found in <arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h>. The last
+          integer CONFIG is the pad setting value like pull-up on this pin. Please
+          refer to i.MX8M Mini Reference Manual for detailed CONFIG settings.
+
+    required:
+      - fsl,pins
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  # Pinmux controller node
+  - |
+    iomuxc: pinctrl@...30000 {
+        compatible = "fsl,imx8mm-iomuxc";
+        reg = <0x30330000 0x10000>;
+
+        pinctrl_uart2: uart2grp {
+            fsl,pins = <
+                0x23C 0x4A4 0x4FC 0x0 0x0	0x140
+                0x240 0x4A8 0x000 0x0 0x0	0x140
+            >;
+        };
+    };
+
+...
-- 
2.7.4