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Wed, 26 Oct 2022 17:51:27 +0000 From: Oleksii Moisieiev To: "robh+dt@kernel.org" CC: Oleksii Moisieiev , "mcoquelin.stm32@gmail.com" , "alexandre.torgue@st.com" , "linus.walleij@linaro.org" , "gregkh@linuxfoundation.org" , "devicetree@vger.kernel.org" , "tomase@xilinx.com" , "benjamin.gaignard@st.com" , "broonie@kernel.org" , "arnd@arndb.de" , "shawnguo@kernel.org" , "fabio.estevam@nxp.com" , "loic.pallardy@st.com" , "mark.rutland@arm.com" , Sudeep Holla , Cristian Marussi , Stefano Stabellini , "a.fatoum@pengutronix.de" , "peng.fan@oss.nxp.com" , "linux-kernel@vger.kernel.org" Subject: [PATCH v5 1/2] dt-bindings: Update scmi node description Thread-Topic: [PATCH v5 1/2] dt-bindings: Update scmi node description Thread-Index: AQHY6WOSKD8hZzACsUOzly7HVHy3Rg== Date: Wed, 26 Oct 2022 17:51:27 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-publictraffictype: Email x-ms-traffictypediagnostic: PA4PR03MB7136:EE_|AS8PR03MB9069:EE_ x-ms-office365-filtering-correlation-id: 6e7fa768-7567-4481-81b4-08dab77ab4da x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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charset="utf-8" Add '#feature-domain-cells' property description to the scmi node. This property makes scmi node as feature-domain-controller provider, which allows consumers to provide scmi node with the device_ids of the devices, w= hich are using scmi protocols to control clocks/resets/power-domains etc. The device_ids could be used to set the device permissions for the Fimware using BASE_SET_DEVICE_PERMISSIONS message (see 4.2.2.10 of [0]). Device permissions management described in DEN 0056, Section 4.2.2.10 [0]. For SCMI this property is used by Trusted Agent to set the device permissio= ns for the Non-Trusted Agents. Trusted and non-trusted Agent terms described in Section 4.1.1 [0]. [0] https://developer.arm.com/documentation/den0056/latest Signed-off-by: Oleksii Moisieiev --- Changes v1 -> V2: - update parameter name, made it xen-specific - add xen vendor bindings Changes V2 -> V3: - update parameter name, make it generic - update parameter format, add link to controller - do not include xen vendor bindings as already upstreamed Changes V3 -> V4: - introduce domain controller provider/consumer device tree bindings - making scmi node to act as domain controller provider when the device permissions should be configured Changes V4 -> V5: - rename domain-controller to feature-domain-controller - feature-domains format fixes --- .../bindings/firmware/arm,scmi.yaml | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Doc= umentation/devicetree/bindings/firmware/arm,scmi.yaml index 1c0388da6721..bb5aa49e88fd 100644 --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml @@ -89,6 +89,16 @@ properties: atomic mode of operation, even if requested. default: 0 =20 + '#feature-domain-cells': + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Number of cells in a domain controller specifier. + Set const to 1 here for nodes providing the device id, needed for + the BASE_SET_DEVICE_PERMISSIONS message (see 4.2.2.10 of [0]). + const: 1 + + feature-domain-controller: true + arm,smc-id: $ref: /schemas/types.yaml#/definitions/uint32 description: @@ -429,4 +439,22 @@ examples: }; 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charset="utf-8" Introducing of the common device controller bindings for the controller provider and consumer devices. Those bindings are intended to allow divided system on chip into muliple domains, that can be used to configure hardware permissions. Signed-off-by: Oleksii Moisieiev --- .../feature-domain-controller.yaml | 80 +++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 Documentation/devicetree/bindings/feature-domains/featu= re-domain-controller.yaml diff --git a/Documentation/devicetree/bindings/feature-domains/feature-doma= in-controller.yaml b/Documentation/devicetree/bindings/feature-domains/feat= ure-domain-controller.yaml new file mode 100644 index 000000000000..431382099012 --- /dev/null +++ b/Documentation/devicetree/bindings/feature-domains/feature-domain-cont= roller.yaml @@ -0,0 +1,80 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/feature-domains/feature-domain-controll= er.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Generic Domain Controller bindings + +maintainers: + - Oleksii Moisieiev + +description: |+ + Common Feature Domains Controller bindings properties + + Domain controllers allow to divided system on chip into multiple feature + domains that can be used to select by who hardware blocks could be acces= sed. + A feature domain could be a cluster of CPUs (or coprocessors), a range of + addresses or a group of hardware blocks. + + This device tree bindings can be used to bind feature domain consumer de= vices + with their feature domains provided by feature-domains controllers. + Feature omain controller provider can be represened by any node in the + device tree and can provide one or more configuration parameters, needed= to + control parameters of the consumer device. A consumer node can refer to = the + provider by phandle and a set of phandle arguments, specified by + '#feature-domain-cells' property in the device controller provider node. + + Device controllers are typically used to set the permissions of the hard= ware + block. The contents of the feature-domains configuration properties are + defined by the binding for the individual feature-domains controller dev= ice. + + Each node can be a consumer for the several providers. The first + configuration of 'feature-domains' or the one named 'default' is applied + before probing the device itself. + +# always select the core schema +select: true + +properties: + '#feature-domain-cells': + $ref: /schemas/types.yaml#/definitions/uint32 + description: Number of cells in a feature-domains controller specifier; + Can be any value as specified by device tree binding documentation + of a particular provider. + + feature-domain-names: + $ref: '/schemas/types.yaml#/definitions/string-array' + minItems: 1 + description: + A list of feature-domains names, sorted in the same order as + feature-domains entries. Consumer drivers will use feature-domain-na= mes + to match with existing feature-domains entries. + + feature-domains: + $ref: "/schemas/types.yaml#/definitions/phandle-array" + description: + A list of feature-domains controller specifiers, as defined by the + bindings of the feature-domain-controller provider. + +additionalProperties: true + +examples: + - | + ctrl0: ctrl@100 { + feature-domain-controller; + reg =3D <0x100 0x10>; + #feature-domain-cells =3D <2>; + }; + + ctrl1: ctrl@110 { + feature-domain-controller; + reg =3D <0x110 0x10>; + #feature-domain-cells =3D <3>; + }; + + foo@0 { + reg =3D <0x0 0x1>; + feature-domains =3D <&ctrl0 1 2>, <&ctrl1 3 4 5>; + feature-domain-names =3D "default", "unbind"; + }; --=20 2.34.1