From mboxrd@z Thu Jan  1 00:00:00 1970
From: cw00.choi@samsung.com (Chanwoo Choi)
Date: Tue, 14 Apr 2015 16:53:35 +0900
Subject: [PATCH v7 1/9] arm64: dts: exynos: Add dts files for 64-bit
 Exynos5433 SoC
In-Reply-To: <20150413154949.GI4076@leverpostej>
References: <1426637856-3730-1-git-send-email-cw00.choi@samsung.com>
 <1426637856-3730-2-git-send-email-cw00.choi@samsung.com>
 <20150330160940.GA13731@leverpostej> <5519E2B6.2030905@samsung.com>
 <20150402173558.GB30669@leverpostej> <551DD321.6030707@samsung.com>
 <20150407102523.GA23190@leverpostej> <20150413105618.GD4076@leverpostej>
 <552BB14A.6010205@samsung.com> <20150413154949.GI4076@leverpostej>
Message-ID: <552CC77F.10801@samsung.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi Kukjin and Mark,

On 04/14/2015 12:49 AM, Mark Rutland wrote:
>>>>>> So NAK to the PSCI node and PSCI enable method in this dts until we
>>>>>> either have a working firmware, or a reasonable mechanism to handle the
>>>>>> deficiency.
>>>>>
>>>>> There is only CPU0 hotplug issue. Excpet CPU{1-7} are well working.
>>>>
>>>> I understand that, but the issue with CPU0 is still a blocker from my
>>>> PoV.
>>>>
>>>>> To fix this issue, we must need the help of firmware developer.
>>>>> But, We never get the any help.
>>>>
>>>> Previously dyou said that you did not have access to the source code
>>>> rather than not having help from the relevant firmware engineers. I take
>>>> it you have informed them of the issue with CPU0?
>>
>> I didn't ask any help to firmware engineer because I didn't know who firmware engineer
>> and also didn't access the source code. If I knew the engineer and can access them,
>> I would have asked some help to them or inquired the reason about CPU0 not hotplugged.
> 
> You must have acquired the firmware (or board(s) with the firmware
> preloaded) from somewhere. Surely you can work backwards from there to
> file a bug report and/or inquire as to who you need to speak to...

As you commented, I got the board that firmware was preloaded.
Unfortunately, I didn't know the any routine to contact firmware developer
and developer about SoC design.

Dear Kukjin,
I need your help about CPU0 issue of Exynos SoC.
Could you answer why CPU0 cannot be hotplugged on Exynos SoC?

Thanks,
Chanwoo Choi