Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry

From	Tony Lindgren <tony@atomide.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry
Date	2015-11-26 21:50 +0100
Message-ID	<qzbEn-1Ge-47@gated-at.bofh.it> (permalink)
References	(2 earlier) <qyMPD-1oW-3@gated-at.bofh.it> <qyOeK-29C-29@gated-at.bofh.it> <qyPub-3am-27@gated-at.bofh.it> <qyWlY-7X9-5@gated-at.bofh.it> <qz0IV-35e-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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* Pali Rohár <pali.rohar@gmail.com> [151126 01:08]:
> On Wednesday 25 November 2015 20:19:21 Frank Rowand wrote:
> > > Or populate /proc/atags only for the ones that need it from machine
> > > specific init_early?
> > 
> > This is circling back to the first comment from Russell King where
> > he suggested a legacy file for the N900 which calls save_atags():
> > 
> >     Are the ATAGs at a fixed address on the N900?  Can that be handled in
> >     some kind of legacy file for the N900 which calls save_atags() on it, so
> >     we don't end up introducing yet more stuff that we have to maintain into
> >     the distant future?  If not, what about copying a known working atag
> >     structure into a legacy file for the N900?
> > 
> > It seems to me that patches 1, 2, 4, and 5 could be replaced by this
> > approach.
> 
> Hi Frank, in this case I will ask my question again: It is possible to
> read atags from that legacy file. And if yes how? I was not thinking
> about this approach because somebody in past wrote that this is not
> possible...

Just to explore options.. How about make a minimal device driver that
just loads the atags blob from /lib/firmware and then shows it in
/proc/atags? Of course some checking on the atags should be done by
the driver..

That would work as long as the kernel no longer needs it.

Regards,

Tony
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Thread

Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Pavel Machek <pavel@ucw.cz> - 2015-11-22 08:00 +0100
  Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Pali Rohár <pali.rohar@gmail.com> - 2015-11-23 15:50 +0100
    Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Tony Lindgren <tony@atomide.com> - 2015-11-25 19:20 +0100
      Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Arnd Bergmann <arnd@arndb.de> - 2015-11-25 20:50 +0100
        Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Tony Lindgren <tony@atomide.com> - 2015-11-25 22:10 +0100
          Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Arnd Bergmann <arnd@arndb.de> - 2015-11-25 22:40 +0100
            Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár <pali.rohar@gmail.com> - 2015-11-25 22:50 +0100
              Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Arnd Bergmann <arnd@arndb.de> - 2015-11-25 23:00 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár <pali.rohar@gmail.com> - 2015-11-25 23:10 +0100
          Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags"  entry Frank Rowand <frowand.list@gmail.com> - 2015-11-26 05:30 +0100
            Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Pali Rohár <pali.rohar@gmail.com> - 2015-11-26 10:10 +0100
              Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Tony Lindgren <tony@atomide.com> - 2015-11-26 21:50 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2015-11-26 22:20 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Pali Rohár <pali.rohar@gmail.com> - 2015-11-27 09:40 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Michael Trimarchi <michael@amarulasolutions.com> - 2015-11-27 09:50 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Michael Trimarchi <michael@amarulasolutions.com> - 2015-11-27 10:00 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Tony Lindgren <tony@atomide.com> - 2015-11-27 16:00 +0100
              Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-11-27 14:30 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-11-27 21:00 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Arnd Bergmann <arnd@arndb.de> - 2015-11-27 22:10 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-11-28 00:30 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Arnd Bergmann <arnd@arndb.de> - 2015-11-28 13:30 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-11-28 14:00 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-11-28 13:40 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-11-28 18:40 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags"  entry Frank Rowand <frowand.list@gmail.com> - 2015-11-28 22:10 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-11-29 19:20 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár <pali.rohar@gmail.com> - 2015-11-29 19:20 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-11-30 00:20 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry Pali Rohár <pali.rohar@gmail.com> - 2015-11-30 01:20 +0100
                Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT  "/chosen/linux,atags" entry Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-11-30 01:20 +0100

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