From: arnd@arndb•de (Arnd Bergmann)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v4 00/11] ep93xx: Move SoC private bits to core
Date: Wed, 14 Mar 2012 17:00:06 +0000 [thread overview]
Message-ID: <201203141700.06226.arnd@arndb.de> (raw)
In-Reply-To: <ADE657CA350FB648AAC2C43247A983F0020695AB9B9B@AUSP01VMBX24.collaborationhost.net>
On Wednesday 14 March 2012, H Hartley Sweeten wrote:
> On Wednesday, March 14, 2012 6:51 AM, Arnd Bergmann wrote:
> > As the first steps (after reading Documentation/devicetree/booting-without-of.txt)
> > the best way forward is probably to take you favourite board file and
> > add a DT_MACHINE_START section so you can boot the same machine
> > when passing an empty devicetree rather than ATAGS. Then add the interrupt
> > controller (should be simple for VIC), followed by gpio (needs bindings,
> > see Documentation/devicetree/bindings/gpio/*.txt), i2c and spi. After
> > you have all that infrastructure in place, you can convert every other
> > device, one at a time. Some (anything without platform_data) will be
> > Trivial, others require you to come up with a new binding document
> > and properties to replace the platform_data. Many people try to do
> > the ones from board files first because it lets them remove the board
> > files, and only after that look at converting the core devices, but you
> > can do any order you like.
>
> The main problem I see with converting the ep93xx platform to device tree
> is that it requires modifying the bootloader. Correct me if I am wrong.
You can always use legacy bootloaders with an appended device tree.
It's slightly less interesting that way but it still works. You can
also use a second-stage boot loader, but that would require having
one that supports your platform.
Arnd
prev parent reply other threads:[~2012-03-14 17:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-12 22:48 [PATCH v4 00/11] ep93xx: Move SoC private bits to core Ryan Mallon
2012-03-13 12:35 ` Arnd Bergmann
2012-03-13 22:22 ` Ryan Mallon
2012-03-14 13:51 ` Arnd Bergmann
2012-03-14 16:20 ` H Hartley Sweeten
2012-03-14 17:00 ` Arnd Bergmann [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=201203141700.06226.arnd@arndb.de \
--to=arnd@arndb$(echo .)de \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox