linux-kernel - [PATCH 1/2 v6] dt-bindings: watchdog: marvell GTI system watchdog driver

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Date:   Thu, 4 May 2023 16:24:38 +0530
From:   Bharat Bhushan <bbhushan2@...vell.com>
To:     <wim@...ux-watchdog.org>, <linux@...ck-us.net>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <linux-watchdog@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <sgoutham@...vell.com>
CC:     Bharat Bhushan <bbhushan2@...vell.com>
Subject: [PATCH 1/2 v6] dt-bindings: watchdog: marvell GTI system watchdog driver

Add binding documentation for the Marvell GTI system
watchdog driver.

Signed-off-by: Bharat Bhushan <bbhushan2@...vell.com>
---
v6:
 - Added missed clocks/clock-name device tree property
 - wdt-timer-index changed to marvell,wdt-timer-index, added "type"
   and added more detail to discription

 .../bindings/watchdog/marvell,gti-wdt.yaml    | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/marvell,gti-wdt.yaml

diff --git a/Documentation/devicetree/bindings/watchdog/marvell,gti-wdt.yaml b/Documentation/devicetree/bindings/watchdog/marvell,gti-wdt.yaml
new file mode 100644
index 000000000000..a89c0d377dae
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/marvell,gti-wdt.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/marvell,gti-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell Global Timer (GTI) system watchdog
+
+allOf:
+  - $ref: watchdog.yaml#
+
+maintainers:
+  - Bharat Bhushan <bbhushan2@...vell.com>
+
+properties:
+  compatible:
+    const: marvell,gti-wdt
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+
+  clock-names:
+    minItems: 1
+
+  marvell,wdt-timer-index:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 63
+    description:
+      Different platform have different number of GTI timers. For example
+      some platforms have total 64 timers and other have less than 64 timers.
+      This property will define GTI timer to be used for watchdog on given
+      platform.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - marvell,wdt-timer-index
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        watchdog@...000040000 {
+            compatible = "marvell,gti-wdt";
+            reg = <0x00008020 0x00040000 0x00000000 0x00020000>;
+            interrupts = <GIC_SPI 38 IRQ_TYPE_EDGE_RISING>;
+            clocks = <&sclk>;
+            clock-names = "ref_clk";
+            marvell,wdt-timer-index = <63>;
+        };
+    };
+
+...
-- 
2.17.1