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Mon, 8 Apr 2019 20:48:39 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.1.6-329-gf4aae99-fmstable-20190329v1 Mime-Version: 1.0 X-Me-Personality: 52947553 Message-Id: <998d869d-de1d-4ac9-b4e6-8942945912dd@www.fastmail.com> In-Reply-To: <20190408144216.160082-1-venture@google.com> References: <20190408144216.160082-1-venture@google.com> Date: Mon, 08 Apr 2019 20:48:38 -0400 From: "Andrew Jeffery" To: "Patrick Venture" , "Rob Herring" , mark.rutland@arm.com, "Joel Stanley" , "Greg Kroah-Hartman" Subject: Re: [PATCH v10 1/2] dt-bindings: misc: aspeed-p2a-ctrl: add support X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190408_174846_847694_2000910D X-CRM114-Status: GOOD ( 16.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , devicetree@vger.kernel.org, linux-aspeed@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 9 Apr 2019, at 00:12, Patrick Venture wrote: > Document the ast2400, ast2500 PCI-to-AHB bridge control driver bindings. > > Signed-off-by: Patrick Venture > Reviewed-by: Rob Herring Reviewed-by: Andrew Jeffery > --- > Changes for v10: > - Chopped out nearly identical information. > Changes for v9: > - Added missing details about syscon parent > Changes for v8: > - None > Changes for v7: > - Moved node under the syscon node it requires > Changes for v6: > - None > Changes for v5: > - None > Changes for v4: > - None > Changes for v3: > - None > Changes for v2: > - Added comment about syscon required parameter. > --- > .../bindings/misc/aspeed-p2a-ctrl.txt | 47 +++++++++++++++++++ > 1 file changed, 47 insertions(+) > create mode 100644 Documentation/devicetree/bindings/misc/aspeed-p2a-ctrl.txt > > diff --git a/Documentation/devicetree/bindings/misc/aspeed-p2a-ctrl.txt > b/Documentation/devicetree/bindings/misc/aspeed-p2a-ctrl.txt > new file mode 100644 > index 0000000000000..854bd67ffec68 > --- /dev/null > +++ b/Documentation/devicetree/bindings/misc/aspeed-p2a-ctrl.txt > @@ -0,0 +1,47 @@ > +====================================================================== > +Device tree bindings for Aspeed AST2400/AST2500 PCI-to-AHB Bridge > Control Driver > +====================================================================== > + > +The bridge is available on platforms with the VGA enabled on the > Aspeed device. > +In this case, the host has access to a 64KiB window into all of the > BMC's > +memory. The BMC can disable this bridge. If the bridge is enabled, > the host > +has read access to all the regions of memory, however the host only > has read > +and write access depending on a register controlled by the BMC. > + > +Required properties: > +=================== > + > + - compatible: must be one of: > + - "aspeed,ast2400-p2a-ctrl" > + - "aspeed,ast2500-p2a-ctrl" > + > +Optional properties: > +=================== > + > +- memory-region: A phandle to a reserved_memory region to be used for > the PCI > + to AHB mapping > + > +The p2a-control node should be the child of a syscon node with the > required > +property: > + > +- compatible : Should be one of the following: > + "aspeed,ast2400-scu", "syscon", "simple-mfd" > + "aspeed,g4-scu", "syscon", "simple-mfd" > + "aspeed,ast2500-scu", "syscon", "simple-mfd" > + "aspeed,g5-scu", "syscon", "simple-mfd" > + > +Example > +=================== > + > +g4 Example > +---------- > + > +syscon: scu@1e6e2000 { > + compatible = "aspeed,ast2400-scu", "syscon", "simple-mfd"; > + reg = <0x1e6e2000 0x1a8>; > + > + p2a: p2a-control { > + compatible = "aspeed,ast2400-p2a-ctrl"; > + memory-region = <&reserved_memory>; > + }; > +}; > -- > 2.21.0.392.gf8f6787159e-goog > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel