dt-bindings: serial: Convert i.MX uart to json-schema

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

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1597721685-9280-3-git-send-email-Anson.Huang@nxp.com
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 92 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml b/Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml
new file mode 100644
index 000000000000..cba3f83ccd5f
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml
@@ -0,0 +1,92 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/fsl-imx-uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART)
+
+maintainers:
+  - Fabio Estevam <fabio.estevam@nxp.com>
+
+allOf:
+  - $ref: "serial.yaml"
+  - $ref: "rs485.yaml"
+
+properties:
+  compatible:
+    oneOf:
+      - const: fsl,imx1-uart
+      - const: fsl,imx21-uart
+      - const: fsl,imx53-uart
+      - const: fsl,imx6q-uart
+      - items:
+          - enum:
+            - fsl,imx25-uart
+            - fsl,imx27-uart
+            - fsl,imx31-uart
+            - fsl,imx35-uart
+            - fsl,imx50-uart
+            - fsl,imx51-uart
+          - const: fsl,imx21-uart
+      - items:
+          - enum:
+            - fsl,imx6sl-uart
+            - fsl,imx6sll-uart
+            - fsl,imx6sx-uart
+            - fsl,imx6ul-uart
+            - fsl,imx7d-uart
+          - const: fsl,imx6q-uart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  fsl,dte-mode:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      Indicate the uart works in DTE mode. The uart works in DCE mode by default.
+
+  fsl,inverted-tx:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      Indicate that the hardware attached to the peripheral inverts the signal
+      transmitted, and that the peripheral should invert its output using the
+      INVT registers.
+
+  fsl,inverted-rx:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      Indicate that the hardware attached to the peripheral inverts the signal
+      received, and that the peripheral should invert its input using the
+      INVR registers.
+
+  uart-has-rtscts: true
+
+  rs485-rts-delay: true
+  rs485-rts-active-low: true
+  rs485-rx-during-tx: true
+  linux,rs485-enabled-at-boot-time: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    aliases {
+        serial0 = &uart1;
+    };
+
+    uart1: serial@73fbc000 {
+        compatible = "fsl,imx51-uart", "fsl,imx21-uart";
+        reg = <0x73fbc000 0x4000>;
+        interrupts = <31>;
+        uart-has-rtscts;
+        fsl,dte-mode;
+    };