[PATCH v4 0/3] ARM: l2c: add l2c support for RZ/A1

[Russell King - ARM Linux]

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 at 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 at 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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