linux-kernel - RE: [PATCH v7 1/2] mtd: arasan: Add device tree binding documentation

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Date:   Tue, 10 Jan 2017 06:03:25 +0000
From:   Punnaiah Choudary Kalluri <punnaiah.choudary.kalluri@...inx.com>
To:     Rob Herring <robh@...nel.org>
CC:     "dwmw2@...radead.org" <dwmw2@...radead.org>,
        "computersforpeace@...il.com" <computersforpeace@...il.com>,
        "boris.brezillon@...e-electrons.com" 
        <boris.brezillon@...e-electrons.com>,
        "marek.vasut@...il.com" <marek.vasut@...il.com>,
        "richard@....at" <richard@....at>,
        "cyrille.pitchen@...el.com" <cyrille.pitchen@...el.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Michal Simek <michals@...inx.com>,
        "kalluripunnaiahchoudary@...il.com" 
        <kalluripunnaiahchoudary@...il.com>,
        "kpc528@...il.com" <kpc528@...il.com>
Subject: RE: [PATCH v7 1/2] mtd: arasan: Add device tree binding
 documentation

Hi Rob,
    
   Thanks for the review.

> -----Original Message-----
> From: Rob Herring [mailto:robh@...nel.org]
> Sent: Tuesday, January 10, 2017 11:06 AM
> To: Punnaiah Choudary Kalluri <punnaia@...inx.com>
> Cc: dwmw2@...radead.org; computersforpeace@...il.com;
> boris.brezillon@...e-electrons.com; marek.vasut@...il.com;
> richard@....at; cyrille.pitchen@...el.com; mark.rutland@....com; linux-
> kernel@...r.kernel.org; linux-mtd@...ts.infradead.org;
> devicetree@...r.kernel.org; Michal Simek <michals@...inx.com>;
> kalluripunnaiahchoudary@...il.com; kpc528@...il.com; Punnaiah
> Choudary Kalluri <punnaia@...inx.com>
> Subject: Re: [PATCH v7 1/2] mtd: arasan: Add device tree binding
> documentation
> 
> On Mon, Jan 09, 2017 at 08:28:53AM +0530, Punnaiah Choudary Kalluri wrote:
> > This patch adds the dts binding document for arasan nand flash
> > controller.
> >
> > Signed-off-by: Punnaiah Choudary Kalluri <punnaia@...inx.com>
> > ---
> > Changes in v7:
> > - Corrected the acronyms those should be in caps
> > changes in v6:
> > - Removed num-cs property
> > - Separated nandchip from nand controller
> > changes in v5:
> > - None
> > Changes in v4:
> > - Added num-cs property
> > - Added clock support
> > Changes in v3:
> > - None
> > Changes in v2:
> > - None
> > ---
> >  .../devicetree/bindings/mtd/arasan_nfc.txt         | 38
> ++++++++++++++++++++++
> >  1 file changed, 38 insertions(+)
> >  create mode 100644
> Documentation/devicetree/bindings/mtd/arasan_nfc.txt
> >
> > diff --git a/Documentation/devicetree/bindings/mtd/arasan_nfc.txt
> b/Documentation/devicetree/bindings/mtd/arasan_nfc.txt
> > new file mode 100644
> > index 0000000..f20adfc
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mtd/arasan_nfc.txt
> > @@ -0,0 +1,38 @@
> > +Arasan NAND Flash Controller with ONFI 3.1 support
> > +
> > +Required properties:
> > +- compatible: Should be "arasan,nfc-v3p10"
> 
> Needs a note that it must also have an SoC specific compatible string.
> 
  Sorry, I couldn't understand this comment. Could you elaborate it?

> > +- reg: Memory map for module access
> > +- interrupt-parent: Interrupt controller the interrupt is routed through
> > +- interrupts: Should contain the interrupt for the device
> > +- clock-name: List of input clocks - "clk_sys", "clk_flash"
> 
> clk_ is redundant.
> 
  
 I have defined these clock names as per the controller data sheet.
 So, I feel it is fine to have them in sync with the datasheet.
  Please let me know if you still want me to change this.

Regards,
Punnaiah

> > +	      (See clock bindings for details)
> > +- clocks: Clock phandles (see clock bindings for details)
> > +
> > +Optional properties:
> > +- arasan,has-mdma: Enables DMA support
> > +
> > +For NAND partition information please refer the below file
> > +Documentation/devicetree/bindings/mtd/partition.txt
> > +
> > +Example:
> > +	nand0: nand@...00000 {
> > +		compatible = "arasan,nfc-v3p10"
> > +		reg = <0x0 0xff100000 0x1000>;
> > +		clock-name = "clk_sys", "clk_flash"
> > +		clocks = <&misc_clk &misc_clk>;
> > +		interrupt-parent = <&gic>;
> > +		interrupts = <0 14 4>;
> > +		arasan,has-mdma;
> > +		#address-cells = <1>;
> > +		#size-cells = <0>
> > +
> > +		nand@0 {
> > +			reg = <0>
> > +			partition@0 {
> > +				label = "filesystem";
> > +				reg = <0x0 0x0 0x1000000>;
> > +			};
> > +			(...)
> > +		};
> > +	};
> > --
> > 2.7.4
> >
> > --
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