From mboxrd@z Thu Jan  1 00:00:00 1970
From: Russell King - ARM Linux <linux@armlinux.org.uk>
Subject: Re: [PATCH v4 0/3] ARM: l2c: add l2c support for RZ/A1
Date: Thu, 16 Feb 2017 17:21:28 +0000
Message-ID: <20170216172128.GS27312@n2100.armlinux.org.uk>
References: <20170216161742.29320-1-chris.brandt@renesas.com>
 <20170216164424.GR27312@n2100.armlinux.org.uk>
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To: Arnd Bergmann <arnd@arndb.de>, Chris Brandt <chris.brandt@renesas.com>
Cc: Simon Horman <horms+renesas@verge.net.au>, Magnus Damm <magnus.damm@gmail.com>, Geert Uytterhoeven <geert@linux-m68k.org>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Brad Mouring <brad.mouring@ni.com>, Andrey Smirnov <andrew.smirnov@gmail.com>, Richard Cochran <rcochran@linutronix.de>, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Linux ARM <linux-arm-kernel@lists.infradead.org>
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On Thu, Feb 16, 2017 at 05:57:53PM +0100, Arnd Bergmann wrote:
> On Thu, Feb 16, 2017 at 5:44 PM, Russell King - ARM Linux
> <linux@armlinux.org.uk> wrote:
> > On Thu, Feb 16, 2017 at 11:17:39AM -0500, Chris Brandt wrote:
> >> The PL310 in the Renesas RZ/A1 SoC (R7S72100) does not have the sideband
> >> signals connected between the CPU and L2C. According the PL310 TRM,
> >> sideband signals are optional.
> >>
> >> If a PL310 is added to a system, but the sideband signals are not
> >> connected, some Cortex A9 optimizations cannot be used. In particular,
> >> enabling Full Line Zeros in the CA9 without sidebands connected will
> >> crash the system since the CA9 will expect the L2C to perform operations,
> >> yet the L2C never gets the commands.
> >>
> >> This series adds the option to not enable anything in the PL310 that
> >> uses sidebands, and then adds L2C support to the RZ/A1 DT.
> >>
> >> v4:
> >> * changed l2x0_bresp_dis to l2x0_bresp_disable
> >> * changed l2x0_flz_dis to l2x0_flz_disable
> >
> > Looks good, thanks.
> >
> > I'll want to merge patch 1, but I suspect the other two patches need
> > to go through arm-soc, which will cause a problem due to being merged
> > independently...  Arnd?
> 
> I just checked what we have queued up in next/dt for this platform,
> and I'm fairly sure that there are no conflicts, so you can pick up all three
> and add
> 
> Acked-by: Arnd Bergmann <arnd@arndb.de>

Chris, can you put all three in the patch system, preferably with
Arnd's ack for the last two please?

Thanks.

-- 
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