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, , Matthew Gerlach Subject: Re: [PATCH v12 5/6] ARM: socfpga: add bindings document for fpga bridge drivers In-Reply-To: <20151028092907.GH1166@pengutronix.de> Message-ID: References: <1445983755-24007-1-git-send-email-atull@opensource.altera.com> <1445983755-24007-6-git-send-email-atull@opensource.altera.com> <20151028092907.GH1166@pengutronix.de> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-Originating-IP: [64.129.157.38] X-ClientProxiedBy: CY1PR18CA0037.namprd18.prod.outlook.com (25.163.31.47) To BY1PR03MB1513.namprd03.prod.outlook.com (25.162.210.147) X-Microsoft-Exchange-Diagnostics-untrusted: 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X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=fbd72e03-d4a5-4110-adce-614d51f2077a;Ip=[66.35.236.227];Helo=[sj-itexedge03.altera.priv.altera.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLUPR03MB035 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 28 Oct 2015, Steffen Trumtrar wrote: > Hi! > > On Tue, Oct 27, 2015 at 05:09:14PM -0500, atull@opensource.altera.com wrote: > > From: Alan Tull > > > > Add bindings documentation for Altera SOCFPGA bridges: > > * fpga2sdram > > * fpga2hps > > * hps2fpga > > * lwhps2fpga > > > > Signed-off-by: Alan Tull > > Signed-off-by: Dinh Nguyen > > Signed-off-by: Matthew Gerlach > > --- > > v2: separate into 2 documents for the 2 drivers > > v12: bump version to line up with simple-fpga-bus version > > remove Linux specific notes such as references to sysfs > > move non-DT specific documentation elsewhere > > remove bindings that would have been used to pass configuration > > clean up formatting > > --- > > .../bindings/fpga/altera-fpga2sdram-bridge.txt | 18 ++++++++++ > > .../bindings/fpga/altera-hps2fpga-bridge.txt | 36 ++++++++++++++++++++ > > 2 files changed, 54 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt > > create mode 100644 Documentation/devicetree/bindings/fpga/altera-hps2fpga-bridge.txt > > > > diff --git a/Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt b/Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt > > new file mode 100644 > > index 0000000..11eb5b7 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt > > @@ -0,0 +1,18 @@ > > +Altera FPGA To SDRAM Bridge Driver > > + > > +Required properties: > > +- compatible : Should contain "altr,socfpga-fpga2sdram-bridge" > > + > > +Optional properties: > > +- label : User-readable name for this bridge. > > + Default is br > > +- init-val : 0 if driver should disable bridge at startup > > + 1 if driver should enable bridge at startup > > + Default is to leave bridge in current state. > > I know, that there are bindings, that configure via devicetree, but AFAIK > this is not okay. Yes there is configuration in the DT. I attended a presentation at ELC in Dublin 3 weeks ago - Frank Rowand on "Solving Device Tree Issues." He said in addition to non-probable hardware information, it was a "dirty secret" that DT includes configuration information and some policy. Alan