[PATCH 4/6] arm64: Add DTS support for FSL's LS2085A SoC

[stuart.yoder@freescale.com (Stuart Yoder)]

> -----Original Message-----
> From: Kumar Gala [mailto:galak at codeaurora.org]
> Sent: Friday, August 15, 2014 9:41 AM
> To: Sharma Bhupesh-B45370
> Cc: arnd at arndb.de; Catalin.Marinas at arm.com; devicetree-
> discuss at lists.ozlabs.org; Will.Deacon at arm.com; Yoder Stuart-B08248;
> grant.likely at secretlab.ca; Basu Arnab-B45036; linux-arm-
> kernel at lists.infradead.org
> Subject: Re: [PATCH 4/6] arm64: Add DTS support for FSL's LS2085A SoC
> 
> 
> On Aug 15, 2014, at 9:26 AM, bhupesh.sharma at freescale.com wrote:
> 
> >> -----Original Message-----
> >> From: Kumar Gala [mailto:galak at codeaurora.org]
> >> Sent: Friday, August 15, 2014 7:00 PM
> >> To: Sharma Bhupesh-B45370
> >> Cc: devicetree-discuss at lists.ozlabs.org; Catalin.Marinas at arm.com;
> >> arnd at arndb.de; Will.Deacon at arm.com; Yoder Stuart-B08248;
> >> grant.likely at secretlab.ca; Basu Arnab-B45036; linux-arm-
> >> kernel at lists.infradead.org
> >> Subject: Re: [PATCH 4/6] arm64: Add DTS support for FSL's LS2085A SoC
> >>
> >>
> >> On Aug 15, 2014, at 4:49 AM, Bhupesh Sharma <bhupesh.sharma@freescale.com>
> >> wrote:
> >>
> >>> This patch adds the device tree support for FSL LS2085A SoC based on
> >>> ARMv8 architecture.
> >>>
> >>> Following levels of DTSI/DTS files have been created for the LS2085A
> >>> SoC family:
> >>>
> >>> - fsl-ls2085a.dtsi:
> >>> DTS-Include file for FSL LS2085A SoC.
> >>>
> >>> - fsl-ls2085a-simu.dts:
> >>> DTS file for FSL LS2085a software simulator model.
> >>>
> >>> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
> >>> Signed-off-by: Arnab Basu <arnab.basu@freescale.com>
> >>> Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
> >>> ---
> >>> arch/arm64/boot/dts/fsl-ls2085a-simu.dts |   29 ++++++
> >>
> >> Hmm, outside of something like qemu, we don't normally have simulation
> >> model dts/support in the kernel.
> >
> > Well for ARMv8 - foundation model is an existing simulation model having DTS
> > support.
> >
> > Regards,
> > Bhupesh
> 
> True but that model was generally available to the open source community and
> was to get the base armv8 support going.

Note, the LS2085A SoC definition itself is in fsl-ls2085a.dtsi.  The
fsl-ls2085a-simu is simply a simulation machine that uses that, 
and will generally reflect board-level differences from a physical
machine in things like Ethernet PHYs and so on.  The simulator is
available now to Freescale customers and I expect significant use
by them over the next few years.

If there is a hard rule that 'simulator-based machines are not allowed'
in the kernel, thats fine, but I don't understand why that should be
the case.

Thanks,
Stuart