linux-kernel - [PATCH v3 1/2] dt-bindings: i2c-mux: Add property for settle time

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Message-ID: <20211101122545.3417624-2-horatiu.vultur@microchip.com>
Date:   Mon, 1 Nov 2021 13:25:44 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <peda@...ntia.se>, <robh+dt@...nel.org>,
        <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH v3 1/2] dt-bindings: i2c-mux: Add property for settle time

Some HW requires some time for the signals to settle after the muxing is
changed. Allow this time to be specified in device tree.

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 Documentation/devicetree/bindings/i2c/i2c-mux.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mux.yaml b/Documentation/devicetree/bindings/i2c/i2c-mux.yaml
index 24cac36037f5..4628ff6340c1 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mux.yaml
+++ b/Documentation/devicetree/bindings/i2c/i2c-mux.yaml
@@ -29,6 +29,12 @@ properties:
   '#size-cells':
     const: 0
 
+  settle-time-us:
+    default: 0
+    description:
+      The time required for the signals to settle. Currently only the
+      i2c-mux-gpmux driver supports this optional binding.
+
 patternProperties:
   '^i2c@[0-9a-f]+$':
     $ref: /schemas/i2c/i2c-controller.yaml
-- 
2.33.0