linux-kernel - Re: [PATCHv3 2/5] arm: mvebu: support for SMP on 98DX3336 SoC

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Date:   Mon, 9 Jan 2017 12:40:38 -0600
From:   Rob Herring <robh@...nel.org>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Chris Brand <chris.brand@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jayachandran C <jchandra@...adcom.com>,
        Juri Lelli <juri.lelli@....com>,
        Magnus Damm <damm+renesas@...nsource.se>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Thierry Reding <treding@...dia.com>,
        Sudeep Holla <sudeep.holla@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 2/5] arm: mvebu: support for SMP on 98DX3336 SoC

On Fri, Jan 06, 2017 at 05:14:59PM +1300, Chris Packham wrote:
> Compared to the armada-xp the 98DX3336 uses different registers to set
> the boot address for the secondary CPU so a new enable-method is needed.
> This will only work if the machine definition doesn't define an overall
> smp_ops because there is not currently a way of overriding this from the
> device tree if it is set in the machine definition.
> 
> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> ---
>     Changes in v2:
>     - Document new enable-method value
>     - Correct some references from 98DX4521 to 98DX3236
>     
>     Changes in v3:
>     - Simplify mv98dx3236_resume_init by using of_io_request_and_map()
> 
>  Documentation/devicetree/bindings/arm/cpus.txt     |  1 +
>  .../bindings/arm/marvell/98dx3236-resume-ctrl.txt  | 18 ++++++++

Acked-by: Rob Herring <robh@...nel.org>

>  arch/arm/mach-mvebu/Makefile                       |  1 +
>  arch/arm/mach-mvebu/common.h                       |  1 +
>  arch/arm/mach-mvebu/platsmp.c                      | 43 ++++++++++++++++++
>  arch/arm/mach-mvebu/pmsu-98dx3236.c                | 52 ++++++++++++++++++++++
>  6 files changed, 116 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/arm/marvell/98dx3236-resume-ctrl.txt
>  create mode 100644 arch/arm/mach-mvebu/pmsu-98dx3236.c