linux-kernel - Re: [PATCH v5 0/2] arm64: Add basic support for Marvell Berlin4CT SoC

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Date:	Thu, 30 Jul 2015 19:13:04 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
CC:	<catalin.marinas@....com>, <will.deacon@....com>,
	<khilman@...aro.org>, <arnd@...db.de>, <olof@...om.net>,
	<mark.rutland@....com>, <sudeep.holla@....com>,
	<robh+dt@...nel.org>, <galak@...eaurora.org>, <pawel.moll@....com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v5 0/2] arm64: Add basic support for Marvell Berlin4CT
 SoC

Hi Sebastian,

On Thu, 30 Jul 2015 11:57:27 +0200
Sebastian Hesselbarth <sebastian.hesselbarth@...il.com> wrote:

> On 07/30/2015 11:35 AM, Jisheng Zhang wrote:
> > Marvell Berlin4CT is a SoC based on 64bit ARMv8 architecture. It contains
> > quad CA53 cores.
> >
> > This SoC shares many HW IP with BG2Q and other berlin series. This patchset
> > was tested on Berlin4CT DMP board, and boot to shell ok.
> >
> > Since v4:
> >   - rebased on the latest next tree
> 
> Jisheng,
> 
> some git basics, so you get a better idea of the merge process:
> 
> Please do not base your patches on linux-next. It is not a stable branch
> I can refer to. Also, if there was any dependency with another feature
> that your patches require, you should mention that dependency by
> pointing out either a floating patch set or even better a _stable_
> topic branch of the feature that will be added in the same cycle you
> expect your patches to be merged.

Got it. Thanks for the kindly remind. There's only one dependency:
"arm64: Split out platform options to separate Kconfig" from Olof.

> 
> AFAIKS, there is no dependency at all so please just base them on -rc1

I'd like to learn more to avoid future inconvenience. This means it's better
to rebase on 4.2-rc, right?

Another question is: could patches be based on arm-soc tree if necessary?
for example: if I need the "arm64: Split out platform options to separate
Kconfig" commit.

> (No need to resend, I can take care of it).
> 
> Anyway, I am fine with the series and it has been out for a while now.
> I pick it up, let is set on linux-next for a while and send out a
> topic PR at the end of the week.

Thanks a lot,
Jisheng

> 
> Thanks!
> 
> Sebastian
> 
> >   - adopt Sebastian suggestions such as: move osc out of "/soc" node, use
> >     "Marvell BG4CT DMP board" as model, etc.
> >   - use correct memory size for BG4CT DMP. The total DDR size is 2GB, we start
> >     from 0x01000000, so the avaiable linux memory should be 0x7f000000.
> >
> > Since v3:
> >   - remove bootargs. follow the same behavior as other arm64 SoCs.
> >
> > Since v2:
> >   - remove the memreserve which isn't removed by mistake
> >   - add earlycon to enable earlyconsole, inspired by Sudeep
> >
> > Since v1:
> >   - remove "earlyprintk" bootargs which doesn't work on arm64
> >   - fix GICC_DIR size as pointed out by Mark
> >   - define memory start address instead of memory reservation as suggested by Mark
> >   - add interrupt-affinity to pmu node as pointed out by Sudeep
> >
> > Jisheng Zhang (2):
> >    arm64: dts: Add dts files for Marvell Berlin4CT SoC
> >    arm64: Enable Marvell Berlin SoC family in Kconfig and defconfig
> >
> >   arch/arm64/Kconfig.platforms                  |   6 +
> >   arch/arm64/boot/dts/Makefile                  |   1 +
> >   arch/arm64/boot/dts/marvell/Makefile          |   5 +
> >   arch/arm64/boot/dts/marvell/berlin4ct-dmp.dts |  66 +++++++++++
> >   arch/arm64/boot/dts/marvell/berlin4ct.dtsi    | 164 ++++++++++++++++++++++++++
> >   arch/arm64/configs/defconfig                  |   1 +
> >   6 files changed, 243 insertions(+)
> >   create mode 100644 arch/arm64/boot/dts/marvell/Makefile
> >   create mode 100644 arch/arm64/boot/dts/marvell/berlin4ct-dmp.dts
> >   create mode 100644 arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> >

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