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From:   Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
To:     Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>,
        Shawn Guo <shawnguo@kernel.org>
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Subject: RE: [PATCH 4/7] dt-bindings: spi: add binding file for NXP FlexSPI
 driver
Thread-Topic: [PATCH 4/7] dt-bindings: spi: add binding file for NXP FlexSPI
 driver
Thread-Index: AQHUQRXjtJmUoZazkE+eX5g7E2y7gaTeVfEAgAFITdA=
Date:   Tue, 4 Sep 2018 05:37:30 +0000
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Hi Prabhakar,

> -----Original Message-----
> From: Prabhakar Kushwaha
> Sent: Monday, September 3, 2018 3:24 PM
> To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>; linux-
> mtd@lists.infradead.org; boris.brezillon@bootlin.com; marek.vasut@gmail.c=
om;
> linux-spi@vger.kernel.org; devicetree@vger.kernel.org
> Cc: robh@kernel.org; mark.rutland@arm.com; shawnguo@kernel.org; linux-
> arm-kernel@lists.infradead.org; computersforpeace@gmail.com;
> frieder.schrempf@exceet.de; linux-kernel@vger.kernel.org; Yogesh Narayan
> Gaur <yogeshnarayan.gaur@nxp.com>
> Subject: RE: [PATCH 4/7] dt-bindings: spi: add binding file for NXP FlexS=
PI driver
>=20
> Dear Yogesh,
>=20
> > -----Original Message-----
> > From: linux-kernel-owner@vger.kernel.org <linux-kernel-
> > owner@vger.kernel.org> On Behalf Of Yogesh Gaur
> > Sent: Friday, August 31, 2018 4:00 PM
> > To: linux-mtd@lists.infradead.org; boris.brezillon@bootlin.com;
> > marek.vasut@gmail.com; linux-spi@vger.kernel.org;
> > devicetree@vger.kernel.org
> > Cc: robh@kernel.org; mark.rutland@arm.com; shawnguo@kernel.org; linux-
> > arm-kernel@lists.infradead.org; computersforpeace@gmail.com;
> > frieder.schrempf@exceet.de; linux-kernel@vger.kernel.org; Yogesh
> > Narayan Gaur <yogeshnarayan.gaur@nxp.com>
> > Subject: [PATCH 4/7] dt-bindings: spi: add binding file for NXP
> > FlexSPI driver
> >
> > Add binding file for NXP FlexSPI driver.
> >
> > Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
> > ---
> >  .../devicetree/bindings/spi/spi-nxp-fspi.txt       | 42
> > ++++++++++++++++++++++
> >  1 file changed, 42 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/spi/spi-nxp-
> > fspi.txt
> >
> > diff --git a/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
> > b/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
> > new file mode 100644
> > index 0000000..9f07116
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
> > @@ -0,0 +1,42 @@
> > +* NXP Flex Serial Peripheral Interface (FSPI)
> > +
> > +Required properties:
> > +  - compatible : Should be "nxp,lx2160a-fspi"
> > +  - reg :        First contains the register location and length,
> > +                 Second contains the memory mapping address and
> > +length
>=20
> Why are we overriding reg property.  Is there any special requirement.
>=20
> Can we use "reg" and "ranges" property in device tree.
> Here "reg" represents controller registers and "ranges" represent the mem=
ory
> address of flash.

'reg' property is being mentioned in the file './Documentation/devicetree/b=
indings/spi/spi-bus.txt'
No mention has been given for the 'ranges' property.

Shawn,
Please suggest, did we add different property node 'reg' for the configurat=
ion register address space and 'ranges' for memory mapped address space.

--
Regards
Yogesh Gaur

>=20
> --pk
>=20