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Date: Thu, 6 Oct 2022 05:45:42 +0000 From: Neal Liu <neal_liu@...eedtech.com> To: Rob Herring <robh@...nel.org> CC: Herbert Xu <herbert@...dor.apana.org.au>, "David S . Miller" <davem@...emloft.net>, Joel Stanley <joel@....id.au>, Andrew Jeffery <andrew@...id.au>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, ChiaWei Wang <chiawei_wang@...eedtech.com>, "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>, "linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: RE: [PATCH v2 4/4] dt-bindings: bus: add documentation for Aspeed AHBC > > Add device tree binding documentation for the Aspeed Advanced > > High-Performance Bus (AHB) Controller. > > > > Signed-off-by: Neal Liu <neal_liu@...eedtech.com> > > --- > > .../bindings/bus/aspeed,ast2600-ahbc.yaml | 46 > +++++++++++++++++++ > > 1 file changed, 46 insertions(+) > > create mode 100644 > > Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml > > > > diff --git > > a/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml > > b/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml > > new file mode 100644 > > index 000000000000..c42a350d30a1 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml > > @@ -0,0 +1,46 @@ > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/bus/aspeed,ast2600-ahbc.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: ASPEED Advanced High-Performance Bus Controller (AHBC) Device > > +Tree Bindings > > + > > +maintainers: > > + - Neal Liu <neal_liu@...eedtech.com> > > + - Chia-Wei Wang <chiawei_wang@...eedtech.com> > > + > > +description: | > > + Advanced High-performance Bus Controller (AHBC) supports plenty of > > +mechanisms > > + including a priority arbiter, an address decoder and a data > > +multiplexer > > + to control the overall operations of Advanced High-performance > > + Bus (AHB). AHB is the main system bus for ARM CPU to communicate > > +with the > > + related peripherals. > > + > > +properties: > > + compatible: > > + enum: > > + - aspeed,ast2600-ahbc > > + > > + reg: > > + maxItems: 1 > > + > > +required: > > + - compatible > > + - reg > > + > > +additionalProperties: false > > + > > +examples: > > + - | > > + bus { > > + compatible = "simple-bus"; > > + #address-cells = <1>; > > + #size-cells = <1>; > > + ranges; > > + > > + ahbc: bus@...00000 { > > + compatible = "aspeed,ast2600-ahbc"; > > + reg = <0x1e600000 0x100>; > > Devices on the AHB bus should be child nodes here. Unless this is just for > device master interface to memory, but that's not what the description says. Sorry, I don't understand. "ahbc" device is already a child node here under AHB bus. "ahbc" is a controller to control the overall operations of AHB, which is described in the description. Could you explain more details? Thanks.
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