From: Pierre AUBERT <p.aubert@staubli.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] mx6: Revert "mx6: soc: Disable VDDPU regulator"
Date: Thu, 16 Jan 2014 17:12:39 +0100 [thread overview]
Message-ID: <52D804F7.1000100@staubli.com> (raw)
In-Reply-To: <CAOMZO5BgT+gMV2Ow5+ZqymNhEP77MyPg9Rav=h+mj1J7E-kEXQ@mail.gmail.com>
Le 16/01/2014 17:01, Fabio Estevam a ?crit :
> On Thu, Jan 16, 2014 at 1:50 PM, Otavio Salvador
> <otavio@ossystems.com.br> wrote:
>
>>> It worked for you probably because you used the ldo bypass mode.
>>
>> Yes; I did the bypass mode.
> We currently don't do LDO bypass mode in mainline U-boot. We do it in
> FSL U-boot.
>
> With LDO bypass, lower VDDARM and VDDSOC voltages can be supplied as
> per the mx6 datasheet.
>
> I just measured with the scope and the VDDARM/SOC voltages supplied by
> the 3.10 FSL kernel are below the minimum for the LDO enabled case. So
> setting LDO bypass in U-boot 'fixes' the issue.
>
> We can implement LDO bypass after 2014.01 is out, but for this release
> let's just revert the VDDPU disable patch.
>
> Do you agree?
+1
>
> Regards,
>
> Fabio Estevam
prev parent reply other threads:[~2014-01-16 16:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-16 12:57 [U-Boot] [PATCH] mx6: Revert "mx6: soc: Disable VDDPU regulator" Fabio Estevam
2014-01-16 13:06 ` Stefano Babic
2014-01-16 13:21 ` Fabio Estevam
2014-01-16 15:33 ` Otavio Salvador
2014-01-16 15:42 ` Fabio Estevam
2014-01-16 15:43 ` Fabio Estevam
2014-01-16 15:50 ` Otavio Salvador
2014-01-16 16:01 ` Fabio Estevam
2014-01-16 16:06 ` Otavio Salvador
2014-01-16 16:08 ` Stefano Babic
2014-01-16 16:12 ` Pierre AUBERT [this message]
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