[PATCH v4 0/5] arm64,hi6220: Enable Hisilicon Hi6220 SoC

Haojian Zhuang haojian.zhuang at linaro.org
Thu May 7 02:33:36 PDT 2015

On 7 May 2015 at 17:02, Will Deacon <will.deacon at arm.com> wrote:
> Hi Bintian,
> On Tue, May 05, 2015 at 01:06:34PM +0100, Bintian Wang wrote:
>> Hi6220 is one mobile solution of Hisilicon, this patchset contains
>> initial support for Hi6220 SoC and HiKey development board, which
>> supports octal ARM Cortex A53 cores. Initial support is minimal and
>> includes just the arch configuration, clock driver, device tree
>> configuration.
>> PSCI is enabled in device tree and there is no problem to boot all the
>> octal cores, and the CPU hotplug is also working now, you can download
>> and compile the latest firmware based on the following link to run this
>> patch set:
>> https://github.com/96boards/documentation/wiki/UEFI
>> Changes v4:
>> * Rebase to kernel 4.1-rc1
>> * Delete "arm,cortex-a15-gic" from the gic node in dts
> I gave these patches a go on top of -rc2 using the ATF and UEFI you link to
> above.
> The good news is that the thing booted and all the cores entered at EL2.
> Thanks!
> The bad news is that running hackbench quickly got the *heatsink*
> temperature to 73 degress C and rising (measured with an infrared
> thermometer).

Because you're just testing with minimum patch set. If you can choose
our release
on v3.10 & v3.18, you can observe lower temperature. Because we have thermal
framework and cpufreq driver. We're also upstreaming the thermal driver, but
it's not merged yet.

> So my question is, does this SoC have an automatic thermal cut out?

It's a low cost board. This feature is implemente by software. So we
need thermal
driver and cpufreq driver.


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