Hi Prabhakar,

-----Original Message-----
From: Prabhakar Kushwaha
Sent: Monday, September 3, 2018 3:24 PM
To: Yogesh Narayan Gaur <redacted>; 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 [off-list ref]
Subject: RE: [PATCH 4/7] dt-bindings: spi: add binding file for NXP FlexSPI driver

Dear Yogesh,

quoted

-----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 [off-list ref]
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 <redacted>
---
 .../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

Why are we overriding reg property.  Is there any special requirement.

Can we use "reg" and "ranges" property in device tree.
Here "reg" represents controller registers and "ranges" represent the memory
address of flash.

'reg' property is being mentioned in the file './Documentation/devicetree/bindings/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 configuration register address space and 'ranges' for memory mapped address space.

--
Regards
Yogesh Gaur

--pk