linux-kernel - [PATCH 12/13] dt-bindings: lpspi: Document nxp,lpspi-pincfg property

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Message-Id: <20250814-james-nxp-lpspi-v1-12-9586d7815d14@linaro.org>
Date: Thu, 14 Aug 2025 17:06:52 +0100
From: James Clark <james.clark@...aro.org>
To: Frank Li <Frank.Li@....com>, Mark Brown <broonie@...nel.org>, 
 Clark Wang <xiaoning.wang@....com>, Fugang Duan <B38611@...escale.com>, 
 Gao Pan <pandy.gao@....com>, Fugang Duan <fugang.duan@....com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, Fabio Estevam <festevam@...il.com>, 
 Larisa Grigore <larisa.grigore@....nxp.com>, 
 Larisa Grigore <larisa.grigore@....com>, 
 Ghennadi Procopciuc <ghennadi.procopciuc@....com>, 
 Ciprianmarian Costea <ciprianmarian.costea@....com>, s32@....com
Cc: James Clark <james.clark@...aro.org>, linux-spi@...r.kernel.org, 
 imx@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org
Subject: [PATCH 12/13] dt-bindings: lpspi: Document nxp,lpspi-pincfg
 property

Document the two valid pincfg values and the defaults.

Although the hardware supports two more values for half-duplex modes,
the driver doesn't support them so don't document them.

Signed-off-by: James Clark <james.clark@...aro.org>
---
 Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
index ce7bd44ee17e..3f8833911807 100644
--- a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
@@ -70,6 +70,19 @@ properties:
   power-domains:
     maxItems: 1
 
+  nxp,pincfg:
+    description:
+      'Pin configuration value for CFGR1.PINCFG.
+        - "sin-in-sout-out": SIN is used for input data and SOUT is used for
+                             output data
+        - "sout-in-sin-out": SOUT is used for input data and SIN is used for
+                             output data
+      If no value is specified then the default is "sin-in-sout-out" for host
+      mode and "sout-in-sin-out" for target mode.'
+    enum:
+      - sin-in-sout-out
+      - sout-in-sin-out
+
 required:
   - compatible
   - reg
@@ -95,4 +108,5 @@ examples:
         spi-slave;
         fsl,spi-only-use-cs1-sel;
         num-cs = <2>;
+        nxp,pincfg = "sout-in-sin-out";
     };

-- 
2.34.1