dt-bindings: timer: Convert jcore,pit to DT schema

Convert the J-Core PIT Timer binding to DT schema format. It's a
straight-forward conversion.

Since the 'reg' entries are based on number of cores, we can't put
constraints on it.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250506022253.2587999-1-robh@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Author: robherring

Documentation/devicetree/bindings/timer/jcore,pit.txt

@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/jcore,pit.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: J-Core Programmable Interval Timer and Clocksource
+
+maintainers:
+  - Rich Felker <dalias@libc.org>
+
+properties:
+  compatible:
+    const: jcore,pit
+
+  reg:
+    description:
+      Memory region(s) for timer/clocksource registers. For SMP, there should be
+      one region per cpu, indexed by the sequential, zero-based hardware cpu
+      number.
+
+  interrupts:
+    description:
+      An interrupt to assign for the timer. The actual pit core is integrated
+      with the aic and allows the timer interrupt assignment to be programmed by
+      software, but this property is required in order to reserve an interrupt
+      number that doesn't conflict with other devices.
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    timer@200 {
+        compatible = "jcore,pit";
+        reg = <0x200 0x30 0x500 0x30>;
+        interrupts = <0x48>;
+    };