Re: [PATCH] ARM: dts: imx6sx-sdb: Remove cpufreq OPP override

From: Marek Vasut
Date: Wed May 03 2017 - 10:26:26 EST

On 05/03/2017 03:57 PM, Shawn Guo wrote:
> On Tue, Apr 25, 2017 at 07:28:06PM +0200, Marek Vasut wrote:
>> On 04/25/2017 07:23 PM, Leonard Crestez wrote:
>>> Anyway, that version also sets the supply for reg_arm and reg_soc. It
>>> is not necessary for fixing the crash I'm seeing but is good because it
>>> will result in the minimum voltage on VDD_ARM_SOC_IN rather than a fix
>>> 1375mv. I tested Marek's patch and it works fine on my rev B board
>>> (which otherwise fails to boot upstream).
>> Oh that's nice , thanks ! I don't have SDB and I hacked it up after a
>> brief discussion with Fabio without even compile-testing it, thus RFC.
>> Glad to hear it works and thanks for testing it ! Can you add a formal
>> Tested-by please ?
> Hi Marek,

Hi Shawn,

> Thanks for your patch. But I prefer Leonard's version because: 1) it
> has a better commit log; 2) it sticks to one-patch-does-one-thing
> policy.

Well I'd prefer this patch because
1) It has T-B
2) It actually fixes a problem with the voltage rails such that the DVFS
works without leaving the system in unstable or dead state. You do
need the second part of my patch if you drop the OPP hackery, without
it the power framework cannot correctly configure the core voltages,
so the patch from Leonard makes things worse.

> But I'm going to wait for a while to get Peter's comment discussed,
> before I actually apply Leonard's patch.
> Shawn

Best regards,
Marek Vasut