[PATCH v2 1/2] ARM: Add cpu_resume_arm() for firmwares that resume in ARM state

Kevin Hilman khilman at kernel.org
Mon Jun 8 15:03:04 PDT 2015

Stephen Boyd <sboyd at codeaurora.org> writes:

> On 06/08/2015 02:33 PM, Kevin Hilman wrote:
>> Stephen Boyd <sboyd at codeaurora.org> writes:
>>> On 06/03, Russell King - ARM Linux wrote:
>>>> On Tue, Jun 02, 2015 at 12:12:57PM -0700, Stephen Boyd wrote:
>>>>> Some platforms always enter the kernel in the ARM state even if
>>>>> the kernel is compiled for THUMB2. Add a small wrapper on top of
>>>>> cpu_resume() that switches into THUMB2 state.
>>>>> This fixes a problem reported by Kevin Hilman on next-20150601
>>>>> where the ifc6410 fails to boot a THUMB2 kernel because the
>>>>> platform's firmware always enters the kernel in ARM mode from
>>>>> deep idle states.
>>>> I think this bit of the commit message isn't quite correct: this will
>>>> only resolve the boot problem with a T2 kernel when the failing platform
>>>> is converted to use the cpu_resume_arm() entry point.
>>>> Apart from that, the patch looks good to me, thanks.
>>> Sure, it could say "This provides the functionality to fix a problem
>>> reported by..."
>> Stephen, are you planning to submit this through Russell's patch
>> tracker?  or...
>> Russell, should we take this through arm-soc along with PATCH 2/2 which
>> depends on this one?
> I'm happy to see it be applied by arm-soc maintainers directly given
> that Russell said "the patch looks good to me". The commit text needs a
> slight reword here though, so I can resubmit the patches to arm-soc if
> you like.

Go ahead and respin/resubmit, and I can get them ready, but I'll wait
for an official word or acked-by from Russell before taking them both
through arm-soc.


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