linux-kernel - [PATCH v2] dt-bindings: serial: Convert riscv,sifive-serial to json-schema

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Date:   Wed,  4 Sep 2019 15:49:11 +0530
From:   Pragnesh Patel <pragnesh.patel@...ive.com>
To:     palmer@...ive.com, paul.walmsley@...ive.com
Cc:     Pragnesh Patel <pragnesh.patel@...ive.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] dt-bindings: serial: Convert riscv,sifive-serial to json-schema

Convert the riscv,sifive-serial binding to DT schema using json-schema.

Signed-off-by: Pragnesh Patel <pragnesh.patel@...ive.com>
---

Changes in v2:
- Replace enum with items in compatible property

 .../devicetree/bindings/serial/sifive-serial.txt   | 33 ------------
 .../devicetree/bindings/serial/sifive-serial.yaml  | 62 ++++++++++++++++++++++
 2 files changed, 62 insertions(+), 33 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/serial/sifive-serial.txt
 create mode 100644 Documentation/devicetree/bindings/serial/sifive-serial.yaml

diff --git a/Documentation/devicetree/bindings/serial/sifive-serial.txt b/Documentation/devicetree/bindings/serial/sifive-serial.txt
deleted file mode 100644
index c86b1e5..0000000
--- a/Documentation/devicetree/bindings/serial/sifive-serial.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-SiFive asynchronous serial interface (UART)
-
-Required properties:
-
-- compatible: should be something similar to
-	      "sifive,<chip>-uart" for the UART as integrated
-	      on a particular chip, and "sifive,uart<version>" for the
-	      general UART IP block programming model.	Supported
-	      compatible strings as of the date of this writing are:
-	      "sifive,fu540-c000-uart" for the SiFive UART v0 as
-	      integrated onto the SiFive FU540 chip, or "sifive,uart0"
-	      for the SiFive UART v0 IP block with no chip integration
-	      tweaks (if any)
-- reg: address and length of the register space
-- interrupts: Should contain the UART interrupt identifier
-- clocks: Should contain a clock identifier for the UART's parent clock
-
-
-UART HDL that corresponds to the IP block version numbers can be found
-here:
-
-https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/uart
-
-
-Example:
-
-uart0: serial@...10000 {
-	compatible = "sifive,fu540-c000-uart", "sifive,uart0";
-	interrupt-parent = <&plic0>;
-	interrupts = <80>;
-	reg = <0x0 0x10010000 0x0 0x1000>;
-	clocks = <&prci PRCI_CLK_TLCLK>;
-};
diff --git a/Documentation/devicetree/bindings/serial/sifive-serial.yaml b/Documentation/devicetree/bindings/serial/sifive-serial.yaml
new file mode 100644
index 0000000..e8d3aed
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/sifive-serial.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/sifive-serial.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive asynchronous serial interface (UART)
+
+maintainers:
+  - Pragnesh Patel <pragnesh.patel@...ive.com>
+  - Paul Walmsley  <paul.walmsley@...ive.com>
+  - Palmer Dabbelt <palmer@...ive.com>
+
+allOf:
+  - $ref: /schemas/serial.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: sifive,fu540-c000-uart
+      - const: sifive,uart0
+
+    description:
+      Should be something similar to "sifive,<chip>-uart"
+      for the UART as integrated on a particular chip,
+      and "sifive,uart<version>" for the general UART IP
+      block programming model.
+
+      UART HDL that corresponds to the IP block version
+      numbers can be found here -
+
+      https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/uart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+      #include <dt-bindings/clock/sifive-fu540-prci.h>
+      serial@...10000 {
+        compatible = "sifive,fu540-c000-uart", "sifive,uart0";
+        interrupt-parent = <&plic0>;
+        interrupts = <80>;
+        reg = <0x0 0x10010000 0x0 0x1000>;
+        clocks = <&prci PRCI_CLK_TLCLK>;
+      };
+
+...
-- 
2.7.4