linux-kernel - [RFC PATCH v1 1/2] dt-bindings: pwm: rockchip: add interrupts property

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Message-ID: <94bcb278-7bb9-d173-497c-fe12682c4a17@gmail.com>
Date:   Thu, 29 Sep 2022 16:04:00 +0200
From:   Johan Jonker <jbx6244@...il.com>
To:     heiko@...ech.de
Cc:     thierry.reding@...il.com, u.kleine-koenig@...gutronix.de,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        sebastian.reichel@...labora.com, wxt@...k-chips.com,
        kever.yang@...k-chips.com, linux-pwm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v1 1/2] dt-bindings: pwm: rockchip: add interrupts
 property

The Rockchip SoCs have 4 or more built-in PWM channels.

Configurable to operate in capture mode.
Measures the high/low polarity effective cycles of this input waveform
Generates a single interrupt at the transition of input waveform polarity

Configurable to operate in continuous mode or one-shot mode.
One-shot operation will produce N + 1 periods of the waveform,
where N is the repeat counter value, and generates a single interrupt at
the end of operation.
Continuous mode generates the waveform continuously and
do not generates any interrupts.

Older SoCs have an interrupt for each node.
Newer models share an interrupt.

Add interrupts property to the pwm-rockchip.yaml file.
DT describes hardware. Rockchip PWM driver support for
interrupts might not available.

Signed-off-by: Johan Jonker <jbx6244@...il.com>
---
 Documentation/devicetree/bindings/pwm/pwm-rockchip.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-rockchip.yaml b/Documentation/devicetree/bindings/pwm/pwm-rockchip.yaml
index f2d1dc7e7..f7634069d 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-rockchip.yaml
+++ b/Documentation/devicetree/bindings/pwm/pwm-rockchip.yaml
@@ -37,6 +37,9 @@ properties:
   reg:
     maxItems: 1

+  interrupts:
+    maxItems: 1
+
   clocks:
     minItems: 1
     maxItems: 2
-- 
2.20.1