linux-kernel - Re: [PATCH 1/3] ARM: exynos: clear L220_AUX_CTRL_NS_LOCKDOWN in default l2c_aux

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Message-ID: <20200803142244.GO1551@shell.armlinux.org.uk>
Date:   Mon, 3 Aug 2020 15:22:44 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Guillaume Tucker <guillaume.tucker@...labora.com>,
        Kukjin Kim <kgene@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, kernel@...labora.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] ARM: exynos: clear L220_AUX_CTRL_NS_LOCKDOWN in
 default l2c_aux_val

On Mon, Aug 03, 2020 at 03:34:39PM +0200, Krzysztof Kozlowski wrote:
> On Wed, Jul 29, 2020 at 02:47:31PM +0100, Guillaume Tucker wrote:
> > The L220_AUX_CTRL_NS_LOCKDOWN flag is set during the L2C enable
> > sequence.  There is no need to set it in the default register value,
> > this was done before support for it was implemented in the code.  It
> > is not set in the hardware initial value either.
> > 
> > Clean this up by removing this flag from the default l2c_aux_val, and
> > add it to the l2c_aux_mask to print an alert message if it was already
> > set before the kernel initialisation.
> > 
> > Signed-off-by: Guillaume Tucker <guillaume.tucker@...labora.com>
> > ---
> >  arch/arm/mach-exynos/exynos.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> Makes sense. I'll take it after the merge window.

Yes, because platforms actually have no control over this bit through
these values.

Please fix the description to use the right define, it's
L310_AUX_CTRL_NS_LOCKDOWN not L220_AUX_CTRL_NS_LOCKDOWN.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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