On 7 May 2015 at 17:02, Will Deacon [off-list ref] wrote:

Hi Bintian,

On Tue, May 05, 2015 at 01:06:34PM +0100, Bintian Wang wrote:

quoted

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.

Regards
Haojian