linux-kernel - [RFC PATCH v3 1/2] dt-bindings: mfd/syscon: Add resets property

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Message-Id: <20221211025700.1180843-2-jk@codeconstruct.com.au>
Date:   Sun, 11 Dec 2022 10:56:59 +0800
From:   Jeremy Kerr <jk@...econstruct.com.au>
To:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc:     Mark Brown <broonie@...nel.org>
Subject: [RFC PATCH v3 1/2] dt-bindings: mfd/syscon: Add resets property

Simple syscon devices may require deassertion of a reset signal in order
to access their register set. This change adds the `resets` property from
reset.yaml#/properties/resets (referenced through core.yaml), specifying
a maxItems of 1 for a single (optional) reset descriptor.

This will allow a future change to the syscon driver to implement reset
control.

Signed-off-by: Jeremy Kerr <jk@...econstruct.com.au>
Acked-by: Rob Herring <robh@...nel.org>
---
 Documentation/devicetree/bindings/mfd/syscon.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/syscon.yaml b/Documentation/devicetree/bindings/mfd/syscon.yaml
index 4e4baf53796d..9dc5984d9147 100644
--- a/Documentation/devicetree/bindings/mfd/syscon.yaml
+++ b/Documentation/devicetree/bindings/mfd/syscon.yaml
@@ -86,6 +86,9 @@ properties:
       on the device.
     enum: [1, 2, 4, 8]
 
+  resets:
+    maxItems: 1
+
   hwlocks:
     maxItems: 1
     description:
-- 
2.35.1