linux-kernel - [PATCH V2] dt-bindings: watchdog: Convert Xilinx watchdog bindings to json-schema

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Message-ID: <20220818150637.815-1-srinivas.neeli@xilinx.com>
Date:   Thu, 18 Aug 2022 20:36:37 +0530
From:   Srinivas Neeli <srinivas.neeli@...inx.com>
To:     <linux@...ck-us.net>, <krzysztof.kozlowski+dt@...aro.org>,
        <wim@...ux-watchdog.org>, <michal.simek@...inx.com>,
        <shubhrajyoti.datta@...inx.com>, <srinivas.neeli@...inx.com>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-watchdog@...r.kernel.org>,
        <git@...inx.com>, <git@....com>,
        Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Subject: [PATCH V2] dt-bindings: watchdog: Convert Xilinx watchdog bindings to json-schema

Convert Xilinx watchdog bindings to DT schema format using json-schema

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Signed-off-by: Srinivas Neeli <srinivas.neeli@...inx.com>
---
Changes in V2:
- Updated file name with compatible.
- Added subsystem name in subject prefix.
- Address minior comments.
---
 .../bindings/watchdog/of-xilinx-wdt.txt       | 26 -------
 .../watchdog/xlnx,xps-timebase-wdt.yaml       | 68 +++++++++++++++++++
 2 files changed, 68 insertions(+), 26 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
 create mode 100644 Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml

diff --git a/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt b/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
deleted file mode 100644
index c6ae9c9d5e3e..000000000000
--- a/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-Xilinx AXI/PLB soft-core watchdog Device Tree Bindings
----------------------------------------------------------
-
-Required properties:
-- compatible		: Should be "xlnx,xps-timebase-wdt-1.00.a" or
-			  "xlnx,xps-timebase-wdt-1.01.a".
-- reg			: Physical base address and size
-
-Optional properties:
-- clocks		: Input clock specifier. Refer to common clock
-			  bindings.
-- clock-frequency	: Frequency of clock in Hz
-- xlnx,wdt-enable-once	: 0 - Watchdog can be restarted
-			  1 - Watchdog can be enabled just once
-- xlnx,wdt-interval	: Watchdog timeout interval in 2^<val> clock cycles,
-			  <val> is integer from 8 to 31.
-
-Example:
-axi-timebase-wdt@...00000 {
-	clock-frequency = <50000000>;
-	compatible = "xlnx,xps-timebase-wdt-1.00.a";
-	clocks = <&clkc 15>;
-	reg = <0x40100000 0x10000>;
-	xlnx,wdt-enable-once = <0x0>;
-	xlnx,wdt-interval = <0x1b>;
-} ;
diff --git a/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml
new file mode 100644
index 000000000000..493a1c954707
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/xlnx,xps-timebase-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx AXI/PLB softcore and window Watchdog Timer
+
+maintainers:
+  - Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
+  - Srinivas Neeli <srinivas.neeli@...inx.com>
+
+description:
+  The Timebase watchdog timer(WDT) is a free-running 32 bit counter.
+  WDT uses a dual-expiration architecture. After one expiration of
+  the timeout interval, an interrupt is generated and the WDT state
+  bit is set to one in the status register. If the state bit is not
+  cleared (by writing a one to the state bit) before the next
+  expiration of the timeout interval, a WDT reset is generated.
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    enum:
+      - xlnx,xps-timebase-wdt-1.01.a
+      - xlnx,xps-timebase-wdt-1.00.a
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    description: Frequency of clock in Hz
+
+  xlnx,wdt-interval:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Watchdog timeout interval
+    minimum: 8
+    maximum: 32
+
+  xlnx,wdt-enable-once:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    description: If watchdog is configured as enable once,
+                 then the watchdog cannot be disabled after
+                 it has been enabled.
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    watchdog@...00000 {
+      compatible = "xlnx,xps-timebase-wdt-1.00.a";
+      reg = <0x40100000 0x1000>;
+      clock-frequency = <50000000>;
+      clocks = <&clkc 15>;
+      xlnx,wdt-enable-once = <0x0>;
+      xlnx,wdt-interval = <0x1b>;
+    };
+...
-- 
2.17.1