From mboxrd@z Thu Jan  1 00:00:00 1970
From: catalin.marinas@arm.com (Catalin Marinas)
Date: Tue, 1 Jul 2014 18:00:05 +0100
Subject: [RFC 1/4] ARM: tegra: Move SoC drivers to drivers/soc/tegra
In-Reply-To: <53B2CE4B.2010506@wwwdotorg.org>
References: <53AEF81D.3080408@ti.com> <20140628204025.GA16415@ulmo>
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 <20140630103649.GF28951@arm.com> <20140630104814.GA1495@ulmo>
 <20140630131628.GA31517@e102568-lin.cambridge.arm.com>
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 <20140701105056.GO18313@arm.com> <53B2CE4B.2010506@wwwdotorg.org>
Message-ID: <20140701170005.GW18313@arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Tue, Jul 01, 2014 at 04:05:47PM +0100, Stephen Warren wrote:
> On 07/01/2014 04:50 AM, Catalin Marinas wrote:
> > On Mon, Jun 30, 2014 at 08:36:36PM +0100, Thierry Reding wrote:
> >> On Mon, Jun 30, 2014 at 02:16:34PM +0100, Lorenzo Pieralisi wrote:
> >>> And I think that most of the early bring up issues are just related to
> >>> powering-up/resetting a cpu for it to be booted, probably that's the
> >>> abstraction we should be focusing on, because it should just require poking
> >>> a bunch of registers to kickstart a CPU, no more than that, FW should be
> >>> able to deal with that and that's yet another reason behind PSCI design.
> >>
> >> Right, I agree that if we can push that into PSCI that would be great
> >> (provided there's an open-source implementation of PSCI).
> > 
> > At least one (BSD-style license):
> > 
> > https://github.com/ARM-software/arm-trusted-firmware
> > 
> > There are also some patches for U-Boot (only covering secondary CPU
> > booting for now and not merged yet).
> 
> Are the U-Boot patches:
> 
> a) Patches to make U-Boot provide a PSCI implementation.
> 
> b) Patches to make U-Boot use PSCI as a client.
> 
> If you have a link or patch subject to search for, that'd be
> interesting.

It's (a). See the base stuff:

https://git.kernel.org/cgit/linux/kernel/git/maz/u-boot.git/log/?h=wip/psci-v4

and Allwinner specifics:

https://git.kernel.org/cgit/linux/kernel/git/maz/u-boot.git/log/?h=wip/psci-v4-a20

-- 
Catalin