Re: [RFC 8/9] dt-bindings: serial: meson-uart: convert to yaml

Signed-off-by: Neil Armstrong <redacted>
---
 .../bindings/serial/amlogic,meson-uart.txt    | 38 ----------
 .../bindings/serial/amlogic,meson-uart.yaml   | 75 +++++++++++++++++++
 2 files changed, 75 insertions(+), 38 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt
 create mode 100644 Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml

diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt
deleted file mode 100644
index c06c045126fc..000000000000
--- a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt
+++ /dev/null

@@ -1,38 +0,0 @@
-Amlogic Meson SoC UART Serial Interface
-=======================================
-
-The Amlogic Meson SoC UART Serial Interface is present on a large range
-of SoCs, and can be present either in the "Always-On" power domain or the
-"Everything-Else" power domain.
-
-The particularity of the "Always-On" Serial Interface is that the hardware
-is active since power-on and does not need any clock gating and is usable
-as very early serial console.
-
-Required properties:
-- compatible : compatible: value should be different for each SoC family as :
-       - Meson6 : "amlogic,meson6-uart"
-       - Meson8 : "amlogic,meson8-uart"
-       - Meson8b : "amlogic,meson8b-uart"
-       - GX (GXBB, GXL, GXM) : "amlogic,meson-gx-uart"
-       eventually followed by : "amlogic,meson-ao-uart" if this UART interface
-       is in the "Always-On" power domain.
-- reg : offset and length of the register set for the device.
-- interrupts : identifier to the device interrupt
-- clocks : a list of phandle + clock-specifier pairs, one for each
-          entry in clock names.
-- clock-names :
-   * "xtal" for external xtal clock identifier
-   * "pclk" for the bus core clock, either the clk81 clock or the gate clock
-   * "baud" for the source of the baudrate generator, can be either the xtal
-       or the pclk.
-
-e.g.
-uart_A: serial@84c0 {
-       compatible = "amlogic,meson-gx-uart";
-       reg = <0x0 0x84c0 0x0 0x14>;
-       interrupts = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>;
-       /* Use xtal as baud rate clock source */
-       clocks = <&xtal>, <&clkc CLKID_UART0>, <&xtal>;
-       clock-names = "xtal", "pclk", "baud";
-};

diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
new file mode 100644
index 000000000000..e150e3504fa0
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml

@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019 BayLibre, SAS
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/serial/amlogic,meson-uart.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Meson SoC UART Serial Interface
+
+maintainers:
+  - Neil Armstrong <narmstrong@baylibre.com>
+
+description: |
+  The Amlogic Meson SoC UART Serial Interface is present on a large range
+  of SoCs, and can be present either in the "Always-On" power domain or the
+  "Everything-Else" power domain.
+
+  The particularity of the "Always-On" Serial Interface is that the hardware
+  is active since power-on and does not need any clock gating and is usable
+  as very early serial console.
+
+properties:
+  compatible:
+    oneOf:
+      - description: Allways-on power domain UART controller
+        items:
+        - enum:
+          - amlogic,meson6-uart
+          - amlogic,meson8-uart
+          - amlogic,meson8b-uart
+          - amlogic,meson-gx-uart
+        - const: amlogic,meson-ao-uart
+      - description: Everything-Else power domain UART controller
+        enum:
+        - amlogic,meson6-uart
+        - amlogic,meson8-uart
+        - amlogic,meson8b-uart
+        - amlogic,meson-gx-uart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 3
+    maxItems: 3