From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 4/6] ARM: rockchip: add basic smp support for rk3288
Date: Wed, 15 Oct 2014 00:37:56 +0100 [thread overview]
Message-ID: <20141014233756.GH27405@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <543D9A8F.3040304@rock-chips.com>
On Tue, Oct 14, 2014 at 02:50:07PM -0700, Kever Yang wrote:
> Heiko,
>
> On 10/14/2014 02:23 PM, Heiko St?bner wrote:
> >Am Dienstag, 14. Oktober 2014, 13:24:03 schrieb Doug Anderson:
> >>Kever,
> >>
> >>On Mon, Oct 13, 2014 at 1:12 PM, Kever Yang <kever.yang@rock-chips.com>
> >wrote:
> >>>+ /*
> >>>+ * We need to soft reset the cpu when we turn off the cpu power
> >>>domain, + * or else the active processors might be stalled when
> >>>the individual + * processor is powered down.
> >>>+ */
> >>>+ if (read_cpuid_part_number() != ARM_CPU_PART_CORTEX_A9) {
> >>I haven't done a full review of this patch, but it seems unlikely that
> >>your uses of read_cpuid_part_number() and read_cpuid_part() in this
> >>patch are correct. You use both functions and in both cases compare
> >>the results to ARM_CPU_PART_CORTEX_A9.
> >I think read_cpuid_part() would be the correct one, as it does
> You are right, read_cpuid_part() is correct one on kernel next,
> I mix up 3.14 kernel and next tree, only read_cpuid_part_number() is
> available
> in 3.14 kernel.
>
> I will correct it in my next version, any other changes needed for new
> version?
You need to at the _very_ _minimum_ build test your code against a
recent kernel, and preferably test it to make sure that it works as
you intend.
Developing on such an old kernel version, and hoping that the code is
going to be correct for later kernels isn't a nice idea.
--
FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2014-10-14 23:37 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-13 20:11 [PATCH v4 0/6] add basic rk3288 smp support Kever Yang
2014-10-13 20:11 ` [PATCH v4 1/6] ARM: rockchip: convert to regmap and use pmu syscon if available Kever Yang
2014-10-13 20:11 ` [PATCH v4 2/6] ARM: rockchip: add option to access the pmu via a phandle in smp_operations Kever Yang
2014-10-13 20:11 ` [PATCH v4 3/6] ARM: dts: rockchip: add pmu references to cpus nodes Kever Yang
2014-10-13 20:12 ` [PATCH v4 4/6] ARM: rockchip: add basic smp support for rk3288 Kever Yang
2014-10-14 20:24 ` Doug Anderson
2014-10-14 21:23 ` Heiko Stübner
2014-10-14 21:50 ` Kever Yang
2014-10-14 23:37 ` Russell King - ARM Linux [this message]
2014-10-15 6:49 ` Kever Yang
2014-10-14 23:36 ` Russell King - ARM Linux
2014-10-13 20:12 ` [PATCH v4 5/6] ARM: dts: rockchip: add intmem node for rk3288 smp support Kever Yang
2014-10-13 20:12 ` [PATCH v4 6/6] ARM: dts: rockchip: add reset for CPU nodes Kever Yang
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