[1/2] dt-bindings: serial: Convert generic bindings to json-schema

diff --git a/Documentation/devicetree/bindings/serial/serial.txt b/Documentation/devicetree/bindings/serial/serial.txt
deleted file mode 100644
index 863c2893759e7151..0000000000000000
--- a/Documentation/devicetree/bindings/serial/serial.txt
+++ /dev/null
@@ -1,56 +0,0 @@ 
-Generic Serial DT Bindings
-
-This document lists a set of generic properties for describing UARTs in a
-device tree.  Whether these properties apply to a particular device depends on
-the DT bindings for the actual device.
-
-Optional properties:
-  - cts-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
-    used as the UART's CTS line.
-  - dcd-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
-    used as the UART's DCD line.
-  - dsr-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
-    used as the UART's DSR line.
-  - dtr-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
-    used as the UART's DTR line.
-  - rng-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
-    used as the UART's RNG line.
-  - rts-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
-    used as the UART's RTS line.
-
-  - uart-has-rtscts: The presence of this property indicates that the
-    UART has dedicated lines for RTS/CTS hardware flow control, and that
-    they are available for use (wired and enabled by pinmux configuration).
-    This depends on both the UART hardware and the board wiring.
-    Note that this property is mutually-exclusive with "cts-gpios" and
-    "rts-gpios" above, unless support is provided to switch between modes
-    dynamically.
-
-
-Examples:
-
-	uart1: serial@48022000 {
-		compatible = "ti,am3352-uart", "ti,omap3-uart";
-		ti,hwmods = "uart2";
-		clock-frequency = <48000000>;
-		reg = <0x48022000 0x2000>;
-		interrupts = <73>;
-		dmas = <&edma 28 0>, <&edma 29 0>;
-		dma-names = "tx", "rx";
-		dtr-gpios = <&gpio2 22 GPIO_ACTIVE_LOW>;
-		dsr-gpios = <&gpio2 23 GPIO_ACTIVE_LOW>;
-		dcd-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>;
-		rng-gpios = <&gpio2 25 GPIO_ACTIVE_LOW>;
-		cts-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
-		rts-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
-	};
-
-	scifa4: serial@e6c80000 {
-		compatible = "renesas,scifa-sh73a0", "renesas,scifa";
-		reg = <0xe6c80000 0x100>;
-		interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp2_clks SH73A0_CLK_SCIFA4>;
-		clock-names = "fck";
-		power-domains = <&pd_a3sp>;
-		uart-has-rtscts;
-	};
diff --git a/Documentation/devicetree/bindings/serial/serial.yaml b/Documentation/devicetree/bindings/serial/serial.yaml
new file mode 100644
index 0000000000000000..d408335319f00215
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/serial.yaml
@@ -0,0 +1,95 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/serial/serial.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Serial Interface Generic DT Bindings
+
+maintainers:
+  - Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+description:
+  This document lists a set of generic properties for describing UARTs in a
+  device tree.  Whether these properties apply to a particular device depends
+  on the DT bindings for the actual device.
+
+properties:
+  $nodename:
+    pattern: "^serial@[0-9a-f]+$"
+
+  cts-gpios:
+    description:
+      Must contain a GPIO specifier, referring to the GPIO pin to be used as
+      the UART's CTS line.
+
+  dcd-gpios:
+    description:
+      Must contain a GPIO specifier, referring to the GPIO pin to be used as
+      the UART's DCD line.
+
+  dsr-gpios:
+    description:
+      Must contain a GPIO specifier, referring to the GPIO pin to be used as
+      the UART's DSR line.
+
+  dtr-gpios:
+    description:
+      Must contain a GPIO specifier, referring to the GPIO pin to be used as
+      the UART's DTR line.
+
+  rng-gpios:
+    description:
+      Must contain a GPIO specifier, referring to the GPIO pin to be used as
+      the UART's RNG line.
+
+  rts-gpios:
+    description:
+      Must contain a GPIO specifier, referring to the GPIO pin to be used as
+      the UART's RTS line.
+
+  uart-has-rtscts:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      The presence of this property indicates that the UART has dedicated lines
+      for RTS/CTS hardware flow control, and that they are available for use
+      (wired and enabled by pinmux configuration).  This depends on both the
+      UART hardware and the board wiring.
+      Note that this property is mutually-exclusive with "cts-gpios" and
+      "rts-gpios" above, unless support is provided to switch between modes
+      dynamically.
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    serial@48022000 {
+            compatible = "ti,am3352-uart", "ti,omap3-uart";
+            ti,hwmods = "uart2";
+            clock-frequency = <48000000>;
+            reg = <0x48022000 0x2000>;
+            interrupts = <73>;
+            dmas = <&edma 28 0>, <&edma 29 0>;
+            dma-names = "tx", "rx";
+            dtr-gpios = <&gpio2 22 GPIO_ACTIVE_LOW>;
+            dsr-gpios = <&gpio2 23 GPIO_ACTIVE_LOW>;
+            dcd-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>;
+            rng-gpios = <&gpio2 25 GPIO_ACTIVE_LOW>;
+            cts-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+            rts-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+    };
+
+  - |
+    #include <dt-bindings/clock/sh73a0-clock.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    serial@e6c80000 {
+            compatible = "renesas,scifa-sh73a0", "renesas,scifa";
+            reg = <0xe6c80000 0x100>;
+            interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&mstp2_clks SH73A0_CLK_SCIFA4>;
+            clock-names = "fck";
+            power-domains = <&pd_a3sp>;
+            uart-has-rtscts;
+    };