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

[Punnaiah Choudary Kalluri]

Hi Boris,

  Thanks. I will implement these changes and send the next series.

Regards,
Punnaiah

> -----Original Message-----
> From: Boris Brezillon [mailto:boris.brezillon@xxxxxxxxxxxxxxxxxx]
> Sent: Tuesday, January 10, 2017 1:36 PM
> To: Punnaiah Choudary Kalluri <punnaia@xxxxxxxxxx>
> Cc: Rob Herring <robh@xxxxxxxxxx>; dwmw2@xxxxxxxxxxxxx;
> computersforpeace@xxxxxxxxx; marek.vasut@xxxxxxxxx; richard@xxxxxx;
> cyrille.pitchen@xxxxxxxxx; mark.rutland@xxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx; linux-mtd@xxxxxxxxxxxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; Michal Simek <michals@xxxxxxxxxx>;
> kalluripunnaiahchoudary@xxxxxxxxx; kpc528@xxxxxxxxx
> Subject: Re: [PATCH v7 1/2] mtd: arasan: Add device tree binding
> documentation
> 
> Hi Punnaiah,
> 
> On Tue, 10 Jan 2017 06:03:25 +0000
> Punnaiah Choudary Kalluri <punnaiah.choudary.kalluri@xxxxxxxxxx> wrote:
> 
> > Hi Rob,
> >
> >    Thanks for the review.
> >
> > > -----Original Message-----
> > > From: Rob Herring [mailto:robh@xxxxxxxxxx]
> > > Sent: Tuesday, January 10, 2017 11:06 AM
> > > To: Punnaiah Choudary Kalluri <punnaia@xxxxxxxxxx>
> > > Cc: dwmw2@xxxxxxxxxxxxx; computersforpeace@xxxxxxxxx;
> > > boris.brezillon@xxxxxxxxxxxxxxxxxx; marek.vasut@xxxxxxxxx;
> > > richard@xxxxxx; cyrille.pitchen@xxxxxxxxx; mark.rutland@xxxxxxx;
> linux-
> > > kernel@xxxxxxxxxxxxxxx; linux-mtd@xxxxxxxxxxxxxxxxxxx;
> > > devicetree@xxxxxxxxxxxxxxx; Michal Simek <michals@xxxxxxxxxx>;
> > > kalluripunnaiahchoudary@xxxxxxxxx; kpc528@xxxxxxxxx; Punnaiah
> > > Choudary Kalluri <punnaia@xxxxxxxxxx>
> > > 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@xxxxxxxxxx>
> > > > ---
> > > > 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?
> 
> Arasan is an IP vendor, and those IPs are usually embedded in specific
> SoCs. I guess Rob was suggesting to define something like:
> 
>   compatible = "<soc-vendor>,<ip-revision>", "arasan,<ip-revision>";
> 
> This way you can differentiate minor changes/tweaks between each SoC
> (each SoC vendor usually enable/disable specific features based on
> their needs).
> 
> >
> > > > +- 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.
> 
> We already know this is a clock, hence the unneeded clk_ prefix. Please
> drop it.
> 
> Thanks,
> 
> Boris