linux-kernel - [PATCH v3 3/3] dt-bindings: timer: atmel,at91rm9200-st: convert to yaml

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Message-ID: <20230530090758.1652329-4-claudiu.beznea@microchip.com>
Date:   Tue, 30 May 2023 12:07:58 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <daniel.lezcano@...aro.org>,
        <tglx@...utronix.de>, <wim@...ux-watchdog.org>,
        <linux@...ck-us.net>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-watchdog@...r.kernel.org>,
        "Claudiu Beznea" <claudiu.beznea@...rochip.com>,
        Conor Dooley <conor.dooley@...rochip.com>
Subject: [PATCH v3 3/3] dt-bindings: timer: atmel,at91rm9200-st: convert to yaml

Convert Microchip AT91 system timer to YAML.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
---
 .../devicetree/bindings/arm/atmel-sysregs.txt |  9 ---
 .../bindings/timer/atmel,at91rm9200-st.yaml   | 66 +++++++++++++++++++
 2 files changed, 66 insertions(+), 9 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/timer/atmel,at91rm9200-st.yaml

diff --git a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
index 54d3f586403e..68c0eacb01ac 100644
--- a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
@@ -4,15 +4,6 @@ Chipid required properties:
 - compatible: Should be "atmel,sama5d2-chipid" or "microchip,sama7g5-chipid"
 - reg : Should contain registers location and length
 
-System Timer (ST) required properties:
-- compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd"
-- reg: Should contain registers location and length
-- interrupts: Should contain interrupt for the ST which is the IRQ line
-  shared across all System Controller members.
-- clocks: phandle to input clock.
-Its subnodes can be:
-- watchdog: compatible should be "atmel,at91rm9200-wdt"
-
 RAMC SDRAM/DDR Controller required properties:
 - compatible: Should be "atmel,at91rm9200-sdramc", "syscon"
 			"atmel,at91sam9260-sdramc",
diff --git a/Documentation/devicetree/bindings/timer/atmel,at91rm9200-st.yaml b/Documentation/devicetree/bindings/timer/atmel,at91rm9200-st.yaml
new file mode 100644
index 000000000000..12d0bb7bd0c8
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/atmel,at91rm9200-st.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/atmel,at91rm9200-st.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip AT91 System Timer (ST)
+
+maintainers:
+  - Nicolas Ferre <nicolas.ferre@...rochip.com>
+  - Alexandre Belloni <alexandre.belloni@...tlin.com>
+  - Claudiu Beznea <claudiu.beznea@...rochip.com>
+
+description:
+  Microchip AT91 system timer integrates a period interval timer, a watchdog
+  timer and a real-time timer.
+
+properties:
+  compatible:
+    items:
+      - const: atmel,at91rm9200-st
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description:
+      Contain interrupt for the ST which is the IRQ line shared across all
+      system controller members (memory controller, debug unit, system timer,
+      real-time clock, power management controller).
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  watchdog:
+    $ref: ../watchdog/atmel,at91rm9200-wdt.yaml
+    description:
+      Child node describing watchdog.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    st: timer@...ffd00 {
+        compatible = "atmel,at91rm9200-st", "syscon", "simple-mfd";
+        reg = <0xfffffd00 0x100>;
+        interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
+        clocks = <&slow_xtal>;
+
+        watchdog {
+            compatible = "atmel,at91rm9200-wdt";
+        };
+    };
+
+...
-- 
2.34.1