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Subject: Re: [PATCH 4/6] arm64/ls1043a: add DTS for Freescale LS1043A SoC
From: Scott Wood <scottwood@freescale.com>
To: Mark Rutland <mark.rutland@arm.com>
CC: Hou Zhiqiang <B48286@freescale.com>, Marc Zyngier <Marc.Zyngier@arm.com>,
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Date: Tue, 22 Sep 2015 17:43:24 -0500
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On Tue, 2015-09-22 at 23:15 +0100, Mark Rutland wrote:
> On Tue, Sep 22, 2015 at 10:50:21AM +0100, Hou Zhiqiang wrote:
> > > > +       ifc:  ifc@1530000{
> > > > +               compatible = "fsl,ifc", "simple-bus";
> > > > +               reg = <0x0 0x1530000 0x0 0x10000>;
> > > > +               interrupts = <0 43 0x4>;
> > > > +       };
> > > 
> > > Why simple-bus?
> > 
> > There are 3 child node located in dtsi file that should be created and 
> > added
> > to platform device list.
> 
> Are they usable even if the kernel knew nothing about the IFC node?

Yes, except for NAND.

>  If not, the IFC driver should probe them, and simple-bus should go.

IFC is not a new binding.  IFC nodes are expected to have simple-bus.

-Scott