linux-kernel - [RFC PATCH 1/4] dt-bindings: pincfg-node: Add "output-impedance" property

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Date:   Thu, 30 Sep 2021 13:16:27 +0100
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [RFC PATCH 1/4] dt-bindings: pincfg-node: Add "output-impedance" property

On RZ/G2L SoC for Group-B pins, output impedance can be configured.
This patch documents "output-impedance" property in pincfg-node.yaml so
that other platforms requiring such feature can make use of this property.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml b/Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml
index 71ed0a9def84..cdcb23daeca2 100644
--- a/Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml
@@ -114,6 +114,10 @@ properties:
     description: enable output on a pin without actively driving it
       (such as enabling an output buffer)
 
+  output-impedance:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: set the pins output impedance at most X ohm
+
   output-low:
     type: boolean
     description: set the pin to output mode with low level
-- 
2.17.1