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Wed, 28 Jan 2026 15:25:34 +0100 Received: from [10.252.24.160] (10.252.24.160) by STKDAG1NODE2.st.com (10.75.128.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Wed, 28 Jan 2026 15:23:50 +0100 Message-ID: <089559fd-3c9a-4ff4-8732-bb23fa907be8@foss.st.com> Date: Wed, 28 Jan 2026 15:23:45 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 03/12] dt-bindings: bus: document the stm32 debug bus To: Suzuki K Poulose , Mike Leach , James Clark , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mathieu Poirier , Leo Yan , =?UTF-8?Q?Cl=C3=A9ment_Le_Goffic?= , Linus Walleij , "Maxime Coquelin" , Alexandre Torgue , CC: , , , , , References: <20260123-debug_bus-v5-0-90b670844241@foss.st.com> <20260123-debug_bus-v5-3-90b670844241@foss.st.com> Content-Language: en-US From: Gatien CHEVALLIER In-Reply-To: <20260123-debug_bus-v5-3-90b670844241@foss.st.com> Content-Type: text/plain; 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Thanks, Gatien On 1/23/26 11:39, Gatien Chevallier wrote: > Document the stm32 debug bus. The debug bus is responsible for > checking the debug sub-system accessibility before probing any related > drivers. > > Signed-off-by: Gatien Chevallier > --- > .../bindings/bus/st,stm32mp131-dbg-bus.yaml | 76 ++++++++++++++++++++++ > 1 file changed, 76 insertions(+) > > diff --git a/Documentation/devicetree/bindings/bus/st,stm32mp131-dbg-bus.yaml b/Documentation/devicetree/bindings/bus/st,stm32mp131-dbg-bus.yaml > new file mode 100644 > index 000000000000..6c74433efbe3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/bus/st,stm32mp131-dbg-bus.yaml > @@ -0,0 +1,76 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/bus/st,stm32mp131-dbg-bus.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: STM32 Coresight bus > + > +maintainers: > + - Gatien Chevallier > + > +description: > + The STM32 debug bus is in charge of checking the debug configuration > + of the platform before probing the peripheral drivers that rely on the debug > + domain. > + > +properties: > + compatible: > + items: > + - enum: > + - st,stm32mp131-dbg-bus > + - st,stm32mp151-dbg-bus > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 1 > + > + ranges: > + minItems: 1 > + maxItems: 2 > + > + "#access-controller-cells": > + const: 1 > + description: > + Contains the debug profile necessary to access the peripheral. > + > +patternProperties: > + "@[0-9a-f]+$": > + description: Debug related peripherals > + type: object > + > + additionalProperties: true > + > + required: > + - access-controllers > + > +required: > + - "#access-controller-cells" > + - "#address-cells" > + - "#size-cells" > + - compatible > + - ranges > + > +additionalProperties: false > + > +examples: > + - | > + #include > + > + dbg_bus: bus@50080000 { > + compatible = "st,stm32mp131-dbg-bus"; > + #address-cells = <1>; > + #size-cells = <1>; > + #access-controller-cells = <1>; > + ranges = <0x50080000 0x50080000 0x3f80000>; > + > + cti@50094000 { > + compatible = "arm,coresight-cti", "arm,primecell"; > + reg = <0x50094000 0x1000>; > + clocks = <&rcc CK_DBG>; > + clock-names = "apb_pclk"; > + access-controllers = <&dbg_bus 0>; > + }; > + }; >