On Mon, 3 Sep 2018 09:54:08 +0000 Prabhakar Kushwaha <[email protected]> wrote:
> Dear Yogesh, > > > -----Original Message----- > > From: [email protected] <linux-kernel- > > [email protected]> On Behalf Of Yogesh Gaur > > Sent: Friday, August 31, 2018 4:00 PM > > To: [email protected]; [email protected]; > > [email protected]; [email protected]; > > [email protected] > > Cc: [email protected]; [email protected]; [email protected]; linux- > > [email protected]; [email protected]; > > [email protected]; [email protected]; Yogesh > > Narayan Gaur <[email protected]> > > 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 <[email protected]> > > --- > > .../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. No, ranges is not used for that. It's used when you need to convert from one address space to another, which is not what you're describing here. Check section 2.38 of this document [1] for more details. [1]https://elinux.org/images/c/cf/Power_ePAPR_APPROVED_v1.1.pdf
