linux-kernel - Re: [PATCHv6 1/3] devicetree: Addition of the Altera SDRAM controller

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Date:	Sun, 22 Jun 2014 20:41:24 +0200
From:	Steffen Trumtrar <s.trumtrar@...gutronix.de>
To:	Thor Thayer <tthayer.linux@...il.com>
Cc:	Thor Thayer <tthayer@...era.com>,
	Rob Herring <robherring2@...il.com>, pawel.moll@....com,
	Mark Rutland <mark.rutland@....com>,
	ijc+devicetree@...lion.org.uk, Kumar Gala <galak@...eaurora.org>,
	Rob Landley <rob@...dley.net>, linux@....linux.org.uk,
	Dinh Nguyen <dinguyen@...era.com>, dougthompson@...ssion.com,
	Grant Likely <grant.likely@...aro.org>,
	Borislav Petkov <bp@...en8.de>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-edac@...r.kernel.org
Subject: Re: [PATCHv6 1/3] devicetree: Addition of the Altera SDRAM controller

On Sun, Jun 22, 2014 at 01:31:02PM -0500, Thor Thayer wrote:
> On Sat, Jun 21, 2014 at 4:04 AM, Steffen Trumtrar
> <s.trumtrar@...gutronix.de> wrote:
> > Hi!
> >
> > On Fri, Jun 20, 2014 at 06:22:01PM -0500, tthayer@...era.com wrote:
> >> From: Thor Thayer <tthayer@...era.com>
> >>
> >> Addition of the Altera SDRAM Controller bindings and device tree changes.
> >>
> >> v2: Changes to SoC SDRAM EDAC code.
> >>
> >> v3: Implement code suggestions for SDRAM EDAC code.
> >>
> >> v4: Remove syscon from SDRAM controller bindings.
> >>
> >> v5: No Change, bump version for consistency.
> >>
> >> v6: Only map the ctrlcfg register as syscon.
> >>
> >> Signed-off-by: Thor Thayer <tthayer@...era.com>
> >> ---
> >>  .../bindings/arm/altera/socfpga-sdram.txt          |   11 +++++++++++
> >>  arch/arm/boot/dts/socfpga.dtsi                     |    5 +++++
> >>  2 files changed, 16 insertions(+)
> >>  create mode 100644 Documentation/devicetree/bindings/arm/altera/socfpga-sdram.txt
> >>
> >> diff --git a/Documentation/devicetree/bindings/arm/altera/socfpga-sdram.txt b/Documentation/devicetree/bindings/arm/altera/socfpga-sdram.txt
> >> new file mode 100644
> >> index 0000000..5027026
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/arm/altera/socfpga-sdram.txt
> >> @@ -0,0 +1,11 @@
> >> +Altera SOCFPGA SDRAM Controller
> >> +
> >> +Required properties:
> >> +- compatible : "altr,sdr-ctl";
> >> +- reg : Should contain 1 register ranges(address and length)
> >> +
> >> +Example:
> >> +     sdrctl@...25000 {
> >> +             compatible = "altr,sdr-ctl";
> >> +             reg = <0xffc25000 0x4>;
> >> +     };
> >> diff --git a/arch/arm/boot/dts/socfpga.dtsi b/arch/arm/boot/dts/socfpga.dtsi
> >> index 4676f25..310292e 100644
> >> --- a/arch/arm/boot/dts/socfpga.dtsi
> >> +++ b/arch/arm/boot/dts/socfpga.dtsi
> >> @@ -682,6 +682,11 @@
> >>                       clocks = <&l4_sp_clk>;
> >>               };
> >>
> >> +             sdrctl@...25000 {
> >> +                     compatible = "altr,sdr-ctl", "syscon";
> >
> > Did you forget to add the syscon to the binding documentation?
> >
> Hi Steffen,
> 
> I guess I'm confused about when to use syscon. In my last series, I
> was advised not to include syscon in the bindings but to use it in the
> device tree. I had been including it in the binding document until
> this patch.
> 

Oh, aha. Well, then I'm confused, too. Let's wait for one of the DT
binding guys than.

Regards,
Steffen

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