linux-kernel - [PATCH] dt-bindings: rtc: convert at91sam9 bindings to json-schema

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Date:   Tue, 15 Feb 2022 16:46:49 +0200
From:   Sergiu Moga <sergiu.moga@...rochip.com>
To:     <a.zummo@...ertech.it>, <alexandre.belloni@...tlin.com>,
        <robh+dt@...nel.org>, <nicolas.ferre@...rochip.com>,
        <ludovic.desroches@...rochip.com>
CC:     <linux-rtc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Sergiu Moga <sergiu.moga@...rochip.com>
Subject: [PATCH] dt-bindings: rtc: convert at91sam9 bindings to json-schema

Convert RTC binding for Atmel/Microchip SoCs to Device Tree Schema
format.

Signed-off-by: Sergiu Moga <sergiu.moga@...rochip.com>
---
 .../bindings/rtc/atmel,at91sam9-rtc.txt       | 25 --------
 .../bindings/rtc/atmel,at91sam9-rtc.yaml      | 61 +++++++++++++++++++
 2 files changed, 61 insertions(+), 25 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
 create mode 100644 Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.yaml

diff --git a/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt b/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
deleted file mode 100644
index 3f0e2a5950eb..000000000000
--- a/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-Atmel AT91SAM9260 Real Time Timer
-
-Required properties:
-- compatible: should be one of the following:
-	- "atmel,at91sam9260-rtt"
-	- "microchip,sam9x60-rtt", "atmel,at91sam9260-rtt"
-- reg: should encode the memory region of the RTT controller
-- interrupts: rtt alarm/event interrupt
-- clocks: should contain the 32 KHz slow clk that will drive the RTT block.
-- atmel,rtt-rtc-time-reg: should encode the GPBR register used to store
-	the time base when the RTT is used as an RTC.
-	The first cell should point to the GPBR node and the second one
-	encode the offset within the GPBR block (or in other words, the
-	GPBR register used to store the time base).
-
-
-Example:
-
-rtt@...ffd20 {
-	compatible = "atmel,at91sam9260-rtt";
-	reg = <0xfffffd20 0x10>;
-	interrupts = <1 4 7>;
-	clocks = <&clk32k>;
-	atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
-};
diff --git a/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.yaml b/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.yaml
new file mode 100644
index 000000000000..c78a8c1c9314
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/atmel,at91sam9-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel AT91 RTT Device Tree Bindings
+
+allOf:
+  - $ref: "rtc.yaml#"
+
+maintainers:
+  - Alexandre Belloni <alexandre.belloni@...tlin.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+        - const: atmel,at91sam9260-rtt
+      - items:
+        - const: microchip,sam9x60-rtt
+        - const: atmel,at91sam9260-rtt
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  atmel,rtt-rtc-time-reg:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: |
+      Should encode the GPBR register used to store the time base when the
+      RTT is used as an RTC. The first cell should point to the GPBR node
+      and the second one encodes the offset within the GPBR block (or in
+      other words, the GPBR register used to store the time base).
+    items:
+      maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - atmel,rtt-rtc-time-reg
+
+additionalProperties: false
+
+examples:
+  - |
+    rtt@...ffd20 {
+        compatible = "atmel,at91sam9260-rtt";
+        reg = <0xfffffd20 0x10>;
+        interrupts = <1 4 7>;
+        clocks = <&clk32k>;
+        atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
+    };
-- 
2.25.1