linux-kernel - [PATCH v4 04/12] dt-bindings: pincfg-node: Add properties 'skew-delay-{in,out}put-ps'

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Message-ID: <20251023132700.1199871-5-antonio.borneo@foss.st.com>
Date: Thu, 23 Oct 2025 15:26:52 +0200
From: Antonio Borneo <antonio.borneo@...s.st.com>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>,
        Bartosz Golaszewski <brgl@...ev.pl>, <linux-gpio@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>
CC: Antonio Borneo <antonio.borneo@...s.st.com>,
        Christophe Roullier
	<christophe.roullier@...s.st.com>,
        Fabien Dessenne
	<fabien.dessenne@...s.st.com>,
        Valentin Caron <valentin.caron@...s.st.com>
Subject: [PATCH v4 04/12] dt-bindings: pincfg-node: Add properties 'skew-delay-{in,out}put-ps'

Add the properties 'skew-delay-input-ps' and 'skew-delay-output-ps'
to specify independent skew delay value for the two pin's directions.
Make the new properties unavailable when the existing property
'skew-delay' is selected.

Signed-off-by: Antonio Borneo <antonio.borneo@...s.st.com>
---
 .../bindings/pinctrl/pincfg-node.yaml           | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml b/Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml
index cbfcf215e571d..d1bc389e0a6d1 100644
--- a/Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml
@@ -153,4 +153,21 @@ properties:
       pin. Typically indicates how many double-inverters are
       used to delay the signal.
 
+  skew-delay-input-ps:
+    description:
+      this affects the expected clock skew in ps on an input pin.
+
+  skew-delay-output-ps:
+    description:
+      this affects the expected delay in ps before latching a value to
+      an output pin.
+
+if:
+  required:
+    - skew-delay
+then:
+  properties:
+    skew-delay-input-ps: false
+    skew-delay-output-ps: false
+
 additionalProperties: true
-- 
2.34.1