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SubjectRe: [PATCH v12 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3 RPC-IF MFD bindings
On Wed, 24 Apr 2019, Marek Vasut wrote:

> On 4/24/19 11:23 PM, Rob Herring wrote:
> > On Wed, Apr 24, 2019 at 03:55:36PM +0800, Mason Yang wrote:
> >> Document the bindings used by the Renesas R-Car Gen3 RPC-IF MFD.
> >>
> >> Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
> >> ---
> >> .../devicetree/bindings/mfd/mfd-renesas-rpc.txt | 40 ++++++++++++++++++++++
> >> 1 file changed, 40 insertions(+)
> >> create mode 100644 Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt
> >>
> >> diff --git a/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt b/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt
> >> new file mode 100644
> >> index 0000000..668b822
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt
> >> @@ -0,0 +1,40 @@
> >> +Renesas R-Car Gen3 RPC-IF MFD Device Tree Bindings
> >> +--------------------------------------------------
> >
> > Looks like a SPI flash controller from the example. What makes it an
> > MFD?
>
> It supports both SPI NOR and HyperFlash (CFI-compliant flash with
> different bus interface).

Looks like you're registering one OR the other.

Why don't you just do this from DT?

No reason for this to be an MFD IMHO.

--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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