linux-kernel - [PATCH V4 2/4] dt-bindings: watchdog: xlnx,versal-wwdt: Add versal watchdog

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230420104231.2243079-3-srinivas.neeli@amd.com>
Date:   Thu, 20 Apr 2023 16:12:29 +0530
From:   Srinivas Neeli <srinivas.neeli@....com>
To:     <shubhrajyoti.datta@....com>, <michal.simek@....com>,
        <srinivas.goud@....com>, <wim@...ux-watchdog.org>,
        <linux@...ck-us.net>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>
CC:     <srinivas.neeli@....com>, <linux-watchdog@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <git@....com>,
        <git@...inx.com>, <neelisrinivas18@...il.com>
Subject: [PATCH V4 2/4] dt-bindings: watchdog: xlnx,versal-wwdt: Add versal watchdog

Versal watchdog IP uses window watchdog mode. Window watchdog
timer(WWDT) contains closed(first) and open(second) window with
32 bit width. Write to the watchdog timer within predefined window
periods of time. This means a period that is not too soon and
a period that is not too late.

Add devicetree bindings for versal window watchdog device.

Signed-off-by: Srinivas Neeli <srinivas.neeli@....com>
---
Changes in V4:
- Updated commit subject(removed redundant "bindings").
- Updated commit descriptioni(removed "this patch").
- Updated watchdog.yaml reference to local.
Changes in V3:
- Removed  xlnx,close_percent property.
Changes in V2:
- Added watchdog ref
- Removed timeout-sec property
- Used 4 spaces for example indentation.
---
 .../bindings/watchdog/xlnx,versal-wwdt.yaml   | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml

diff --git a/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml b/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml
new file mode 100644
index 000000000000..14b069599740
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/xlnx,versal-wwdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx Versal window watchdog timer controller
+
+maintainers:
+  - Neeli Srinivas <srinivas.neeli@....com>
+
+description:
+  Versal watchdog intellectual property uses window watchdog mode.
+  Window watchdog timer(WWDT) contains closed(first) and open(second)
+  window with 32 bit width. Write to the watchdog timer within
+  predefined window periods of time. This means a period that is not
+  too soon and a period that is not too late. The WWDT has to be
+  restarted within the open window time. If software tries to restart
+  WWDT outside of the open window time period, it generates a reset.
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    enum:
+      - xlnx,versal-wwdt
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    watchdog@...d0000 {
+        compatible = "xlnx,versal-wwdt";
+        reg = <0xfd4d0000 0x10000>;
+        clocks = <&clock25>;
+        timeout-sec = <30>;
+    };
+...
-- 
2.25.1