From 8455460914b98fba260786e174f8d645aa3d21aa Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 6 Apr 2023 08:48:33 -0700 Subject: [PATCH] dt-bindings: i2c: cadence: Document `resets` property The Cadence I2C controller has an external reset that needs to be de-asserted before the I2C controller can be accessed. Document the `resets` devicetree property that can be used to describe how the reset signal is connected. While the reset signal will always be present in hardware the devicetree property is kept optional for backwards compatibility with existing systems that do not specify the reset property and where the reset signal might not be controlled by operating system. Signed-off-by: Lars-Peter Clausen Acked-by: Krzysztof Kozlowski Acked-by: Michal Simek Signed-off-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml b/Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml index 9187015..cb24d7b 100644 --- a/Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml +++ b/Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml @@ -24,6 +24,9 @@ properties: clocks: minItems: 1 + resets: + maxItems: 1 + interrupts: maxItems: 1 @@ -59,6 +62,7 @@ examples: i2c@e0004000 { compatible = "cdns,i2c-r1p10"; clocks = <&clkc 38>; + resets = <&rstc 288>; interrupts = ; reg = <0xe0004000 0x1000>; clock-frequency = <400000>; -- 2.7.4