From: Nikita Travkin <nikita@trvn.ru>
To: thierry.reding@gmail.com, lee.jones@linaro.org
Cc: u.kleine-koenig@pengutronix.de, robh+dt@kernel.org,
sboyd@kernel.org, krzk@kernel.org, linus.walleij@linaro.org,
masneyb@onstation.org, sean.anderson@seco.com,
linux-pwm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
~postmarketos/upstreaming@lists.sr.ht,
Nikita Travkin <nikita@trvn.ru>
Subject: [PATCH v5 1/2] dt-bindings: pwm: Document clk based PWM controller
Date: Sat, 12 Feb 2022 21:23:41 +0500 [thread overview]
Message-ID: <20220212162342.72646-2-nikita@trvn.ru> (raw)
In-Reply-To: <20220212162342.72646-1-nikita@trvn.ru>
Add YAML devicetree binding for clk based PWM controller
Signed-off-by: Nikita Travkin <nikita@trvn.ru>
--
Changes in v2:
- fix the file name.
Changes in v4:
- Use generic node name in the dt bindings example.
Changes in v5:
- make compatible required
---
.../devicetree/bindings/pwm/clk-pwm.yaml | 46 +++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/clk-pwm.yaml
diff --git a/Documentation/devicetree/bindings/pwm/clk-pwm.yaml b/Documentation/devicetree/bindings/pwm/clk-pwm.yaml
new file mode 100644
index 000000000000..ec1768291503
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/clk-pwm.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/clk-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Clock based PWM controller
+
+maintainers:
+ - Nikita Travkin <nikita@trvn.ru>
+
+description: |
+ Some systems have clocks that can be exposed to external devices.
+ (e.g. by muxing them to GPIO pins)
+ It's often possible to control duty-cycle of such clocks which makes them
+ suitable for generating PWM signal.
+
+allOf:
+ - $ref: pwm.yaml#
+
+properties:
+ compatible:
+ const: clk-pwm
+
+ clocks:
+ description: Clock used to generate the signal.
+ maxItems: 1
+
+ "#pwm-cells":
+ const: 2
+
+unevaluatedProperties: false
+
+required:
+ - compatible
+ - clocks
+
+examples:
+ - |
+ pwm {
+ compatible = "clk-pwm";
+ #pwm-cells = <2>;
+ clocks = <&gcc 0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm_clk_flash_default>;
+ };
--
2.34.1
next prev parent reply other threads:[~2022-02-12 16:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-12 16:23 [PATCH v5 0/2] Clock based PWM output driver Nikita Travkin
2022-02-12 16:23 ` Nikita Travkin [this message]
2022-02-14 7:43 ` [PATCH v5 1/2] dt-bindings: pwm: Document clk based PWM controller Krzysztof Kozlowski
2022-02-12 16:23 ` [PATCH v5 2/2] pwm: Add clock based PWM output driver Nikita Travkin
2022-02-14 11:19 ` Krzysztof Kozlowski
2022-02-19 6:48 ` Nikita Travkin
2022-02-14 18:43 ` Uwe Kleine-König
2022-02-19 6:46 ` Nikita Travkin
2022-02-19 10:10 ` Uwe Kleine-König
2022-02-19 13:54 ` Nikita Travkin
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