linux-kernel - [PATCH 1/2] dt-bindings: timer: Add realtek,otto-tc binding

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Date:   Sun, 16 Jan 2022 22:39:24 +0100
From:   Sander Vanheule <sander@...nheule.net>
To:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sander Vanheule <sander@...nheule.net>
Subject: [PATCH 1/2] dt-bindings: timer: Add realtek,otto-tc binding

New binding for the timer/counter blocks found on the Realtek Otto MIPS
platform.

Signed-off-by: Sander Vanheule <sander@...nheule.net>
---
 .../bindings/timer/realtek,otto-tc.yaml       | 64 +++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/realtek,otto-tc.yaml

diff --git a/Documentation/devicetree/bindings/timer/realtek,otto-tc.yaml b/Documentation/devicetree/bindings/timer/realtek,otto-tc.yaml
new file mode 100644
index 000000000000..12971b9ecdf5
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/realtek,otto-tc.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/realtek,otto-tc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek Otto platform timer/counter bindings
+
+description:
+  "Up-counting 28-bit timer that can operate in oneshot or repeating mode,
+  providing an interrupt at roll-over.
+
+  The timer is driven by a divided clock, derived from the bus clock. The clock
+  divisor is configurable from 2 to 65535. Divisor values of 0 and 1 disable
+  the timer clock. The timer can also be enabled or disabled independently from
+  the clock (divisor) selection.
+
+  The number of timers supported by the different SoC families is:
+  - RTL8380: 5 timers
+  - RTL8390: 5 timers
+  - RTL9300: 6 timers
+  - RTL9310: 7 timers"
+
+maintainers:
+  - Sander Vanheule <sander@...nheule.net>
+
+properties:
+  compatible:
+    const: realtek,otto-tc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Parent clock from peripheral bus
+
+  clock-names:
+    items:
+      - const: bus
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+examples:
+  - |
+    timer0: timer@...0 {
+      compatible = "realtek,otto-tc";
+      reg = <0x3100 0x10>;
+
+      interrupts = <29 4>;
+
+      clocks = <&lx_clk>;
+      clock-names = "bus";
+    };
-- 
2.34.1