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From:   Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
To:     Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>,
        "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
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        Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
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: AQHUQRXqXHufO5GR/k6Z3bXrn70xkqTeVVkw
Date:   Mon, 3 Sep 2018 09:54:08 +0000
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Dear Yogesh,

> -----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 d=
river
>=20
> Add binding file for NXP FlexSPI driver.
>=20
> 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
>=20
> 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

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 memor=
y address of flash.

--pk