From: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
To: Doug Anderson <dianders@chromium.org>,
Tomasz Figa <tomasz.figa@gmail.com>
Cc: Will Deacon <will.deacon@arm.com>,
"kgene.kim@samsung.com" <kgene.kim@samsung.com>,
"olof@lixom.net" <olof@lixom.net>,
"rahul.sharma@samsung.com" <rahul.sharma@samsung.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>,
Mark Brown <broonie@kernel.org>
Subject: Re: Unable to boot mainline on snow chromebook since 3.15
Date: Mon, 08 Sep 2014 08:09:35 +0200 [thread overview]
Message-ID: <540D481F.8030500@collabora.co.uk> (raw)
In-Reply-To: <CAD=FV=UYDDhL02CrhPUAHPncepwAF2-BgTmXOamy-Mdz80S-vw@mail.gmail.com>
Hello Doug,
On 09/08/2014 06:36 AM, Doug Anderson wrote:
>
> One (ugly?) solution would be to add a feature to your bootloader to
> modify the device tree to mark regulators as "always-on". Since the
> booloader gets to touch the device tree and the bootloader is involved
> in communicating into about SimpleFB, it kinda makes sense.
>
I can't say I like to mark the regulators as always-on on the DT and that's
why I copied the patch in the response instead of posting it as a proper patch
but I think relying in the bootloaders to modify the DT is not better.
IMHO U-boot should only modify the strictly necessary like the /chosen branch
even though lately I've seen some attempts in the OMAP community to (ab)use
U-Boot's fdt command to mangle the DT before passing to the kernel in order to
support different Beagle Bone Black capes.
Best regards,
Javier
WARNING: multiple messages have this Message-ID (diff)
From: javier.martinez@collabora.co.uk (Javier Martinez Canillas)
To: linux-arm-kernel@lists.infradead.org
Subject: Unable to boot mainline on snow chromebook since 3.15
Date: Mon, 08 Sep 2014 08:09:35 +0200 [thread overview]
Message-ID: <540D481F.8030500@collabora.co.uk> (raw)
In-Reply-To: <CAD=FV=UYDDhL02CrhPUAHPncepwAF2-BgTmXOamy-Mdz80S-vw@mail.gmail.com>
Hello Doug,
On 09/08/2014 06:36 AM, Doug Anderson wrote:
>
> One (ugly?) solution would be to add a feature to your bootloader to
> modify the device tree to mark regulators as "always-on". Since the
> booloader gets to touch the device tree and the bootloader is involved
> in communicating into about SimpleFB, it kinda makes sense.
>
I can't say I like to mark the regulators as always-on on the DT and that's
why I copied the patch in the response instead of posting it as a proper patch
but I think relying in the bootloaders to modify the DT is not better.
IMHO U-boot should only modify the strictly necessary like the /chosen branch
even though lately I've seen some attempts in the OMAP community to (ab)use
U-Boot's fdt command to mangle the DT before passing to the kernel in order to
support different Beagle Bone Black capes.
Best regards,
Javier
next prev parent reply other threads:[~2014-09-08 6:09 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-05 11:57 Unable to boot mainline on snow chromebook since 3.15 Will Deacon
2014-09-05 12:22 ` Will Deacon
2014-09-05 12:22 ` Will Deacon
2014-09-05 13:46 ` Ajay kumar
2014-09-05 13:46 ` Ajay kumar
2014-09-05 13:56 ` Vivek Gautam
2014-09-05 13:56 ` Vivek Gautam
2014-09-08 11:17 ` Will Deacon
2014-09-08 11:17 ` Will Deacon
2014-09-05 14:12 ` Marc Zyngier
2014-09-05 14:12 ` Marc Zyngier
2014-09-05 20:25 ` Doug Anderson
2014-09-05 20:25 ` Doug Anderson
2014-09-07 9:06 ` Javier Martinez Canillas
2014-09-07 9:06 ` Javier Martinez Canillas
2014-09-07 15:01 ` Mark Brown
2014-09-07 15:01 ` Mark Brown
2014-09-07 15:51 ` Javier Martinez Canillas
2014-09-07 15:51 ` Javier Martinez Canillas
2014-09-07 15:52 ` Tomasz Figa
2014-09-07 15:52 ` Tomasz Figa
2014-09-07 16:12 ` Javier Martinez Canillas
2014-09-07 16:12 ` Javier Martinez Canillas
2014-09-07 16:19 ` Tomasz Figa
2014-09-07 16:19 ` Tomasz Figa
2014-09-07 16:40 ` Javier Martinez Canillas
2014-09-07 16:40 ` Javier Martinez Canillas
2014-09-08 11:21 ` Will Deacon
2014-09-08 11:21 ` Will Deacon
2014-09-08 11:55 ` Javier Martinez Canillas
2014-09-08 11:55 ` Javier Martinez Canillas
2014-09-08 12:46 ` Will Deacon
2014-09-08 12:46 ` Will Deacon
2014-09-08 12:20 ` Grant Likely
2014-09-08 12:20 ` Grant Likely
2014-09-08 13:49 ` Mark Brown
2014-09-08 13:49 ` Mark Brown
2014-09-08 14:05 ` Javier Martinez Canillas
2014-09-08 14:05 ` Javier Martinez Canillas
2014-09-10 11:17 ` Will Deacon
2014-09-10 11:17 ` Will Deacon
2014-09-10 16:03 ` Doug Anderson
2014-09-10 16:03 ` Doug Anderson
2014-09-10 16:23 ` Will Deacon
2014-09-10 16:23 ` Will Deacon
2014-09-08 15:58 ` Doug Anderson
2014-09-08 15:58 ` Doug Anderson
2014-09-08 19:40 ` Grant Likely
2014-09-08 19:40 ` Grant Likely
2014-09-10 13:06 ` Olof Johansson
2014-09-10 13:06 ` Olof Johansson
2014-09-10 14:31 ` Mark Brown
2014-09-10 14:31 ` Mark Brown
2014-09-10 14:56 ` Grant Likely
2014-09-10 14:56 ` Grant Likely
2014-09-10 15:39 ` Mark Brown
2014-09-10 15:39 ` Mark Brown
2014-09-10 16:29 ` Grant Likely
2014-09-10 16:29 ` Grant Likely
2014-09-10 16:45 ` Doug Anderson
2014-09-10 16:45 ` Doug Anderson
2014-09-10 19:45 ` Mark Brown
2014-09-10 19:45 ` Mark Brown
2014-09-10 19:51 ` Doug Anderson
2014-09-10 19:51 ` Doug Anderson
2014-09-10 16:57 ` Mark Brown
2014-09-10 16:57 ` Mark Brown
2014-09-11 9:22 ` Grant Likely
2014-09-11 9:22 ` Grant Likely
2014-09-11 18:03 ` Mark Brown
2014-09-11 18:03 ` Mark Brown
2014-09-11 22:54 ` Doug Anderson
2014-09-11 22:54 ` Doug Anderson
2014-09-29 12:57 ` Thierry Reding
2014-09-29 12:57 ` Thierry Reding
2014-09-29 13:12 ` Grant Likely
2014-09-29 13:12 ` Grant Likely
2014-09-29 16:37 ` Mark Brown
2014-09-29 16:37 ` Mark Brown
2014-09-30 6:12 ` Thierry Reding
2014-09-30 6:12 ` Thierry Reding
2014-09-29 20:46 ` Maxime Ripard
2014-09-29 20:46 ` Maxime Ripard
2014-09-10 16:36 ` Olof Johansson
2014-09-10 16:36 ` Olof Johansson
2014-09-10 18:17 ` Mark Brown
2014-09-10 18:17 ` Mark Brown
2014-09-11 9:06 ` Grant Likely
2014-09-11 9:06 ` Grant Likely
2014-09-11 16:16 ` Mark Brown
2014-09-11 16:16 ` Mark Brown
2014-09-08 4:36 ` Doug Anderson
2014-09-08 4:36 ` Doug Anderson
2014-09-08 6:09 ` Javier Martinez Canillas [this message]
2014-09-08 6:09 ` Javier Martinez Canillas
2014-09-08 15:55 ` Doug Anderson
2014-09-08 15:55 ` Doug Anderson
2014-09-08 16:07 ` Will Deacon
2014-09-08 16:07 ` Will Deacon
2014-09-08 16:12 ` Doug Anderson
2014-09-08 16:12 ` Doug Anderson
2014-09-08 10:20 ` Mark Brown
2014-09-08 10:20 ` Mark Brown
2014-09-08 4:43 ` Doug Anderson
2014-09-08 4:43 ` Doug Anderson
-- strict thread matches above, loose matches on Subject: below --
2015-01-30 4:56 bruce m beach
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