From mboxrd@z Thu Jan  1 00:00:00 1970
From: scottwood@freescale.com (Scott Wood)
Date: Tue, 22 Sep 2015 17:43:24 -0500
Subject: [PATCH 4/6] arm64/ls1043a: add DTS for Freescale LS1043A SoC
In-Reply-To: <20150922221504.GA1497@svinekod>
References: <1442838158-2964-1-git-send-email-B48286@freescale.com>
 <1442838158-2964-5-git-send-email-B48286@freescale.com>
 <20150922012403.GA1535@svinekod>
 <CY1PR0301MB078008B10188504C951076498B450@CY1PR0301MB0780.namprd03.prod.outlook.com>
 <20150922221504.GA1497@svinekod>
Message-ID: <1442961804.19102.294.camel@freescale.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

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 at 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