linux-kernel - [PATCH 1/4] dt-bindings: pwm: sunxi: add PWM controller for Allwinner H616

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Message-ID: <20251205100239.1563353-2-richard.genoud@bootlin.com>
Date: Fri,  5 Dec 2025 11:02:36 +0100
From: Richard Genoud <richard.genoud@...tlin.com>
To: Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Philipp Zabel <p.zabel@...gutronix.de>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	linux-pwm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Richard Genoud <richard.genoud@...tlin.com>
Subject: [PATCH 1/4] dt-bindings: pwm: sunxi: add PWM controller for Allwinner H616

Allwinner H616 SoC contains a PWM controller quite different from the A10.
It has 6 channels than can generate PWM waveforms or clocks if bypass is
enabled.

Signed-off-by: Richard Genoud <richard.genoud@...tlin.com>
---
 .../pwm/allwinner,sun50i-h616-pwm.yaml        | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/allwinner,sun50i-h616-pwm.yaml

diff --git a/Documentation/devicetree/bindings/pwm/allwinner,sun50i-h616-pwm.yaml b/Documentation/devicetree/bindings/pwm/allwinner,sun50i-h616-pwm.yaml
new file mode 100644
index 000000000000..b89735ad3a43
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/allwinner,sun50i-h616-pwm.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/allwinner,sun50i-h616-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner H616 PWM
+
+maintainers:
+  - Richard Genoud <richard.genoud@...tlin.com>
+
+description: |
+  Allwinner H616 PWM can generate standard PWM signals with variable pulse width
+  and period.
+  Also, instead of a PWM signal, a channel can be used to provide a clock.
+
+properties:
+  compatible:
+    const: allwinner,sun50i-h616-pwm
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Bus Clock
+
+  clock-names:
+    items:
+      - const: bus
+
+  resets:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 1
+
+  "#pwm-cells":
+    const: 3
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+
+allOf:
+  - $ref: pwm.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sun50i-h616-ccu.h>
+    #include <dt-bindings/reset/sun50i-h616-ccu.h>
+
+    pwm@...a000 {
+      compatible = "allwinner,sun50i-h616-pwm";
+      reg = <0x0300a000 0x400>;
+      clocks = <&ccu CLK_BUS_PWM>;
+      clock-names = "bus";
+      resets = <&ccu RST_BUS_PWM>;
+      #pwm-cells = <3>;
+      #clock-cells = <1>;
+    };
+...
-- 
2.47.3