Flatten device tree & PPC linux
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i'm using a the taishan board u-boot 1.2.0 and
linux 2.4
Uh, OK. Those are both pretty darn old by now.....
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does u-boot-1.2.0 pass a flatten device tree to the
kernel ?
Maybe.
how do i make confirm this ?
TIA
[U-Boot] Flatten device tree & PPC linu
Quoted 4 lines · Fundu
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i'm using a the taishan board u-boot 1.2.0 and
linux 2.4
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Uh, OK. Those are both pretty darn old by now.....
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does u-boot-1.2.0 pass a flatten device tree to the
kernel ?
Maybe.
how do i make confirm this ?
TIA
I believe the 4xx boards were probably not using FDT back then. You can confirm by "help bootm" -- if it only takes the kernel addy and the optional ramdisk addy, then it is non-FDT.
But whether or not u-boot is FDT capable is pretty much moot point if you are on a v2.4.x kernel, as they don't use FDT.
P.
Quoted 9 lines
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[U-Boot] Flatten device tree & PPC linu
Thanks for clearing that up.
One other question, if i update to u-boot 1.3.4 or whatever is the latest, can i configure so that i doesn't use FDT to boot kernel ?
TIA
Quoted 45 lines · Paul Gortmaker
From: Paul Gortmaker <[email protected]>
Subject: Re: [U-Boot] Flatten device tree & PPC linu
To:fundu_1999at yahoo.com
Cc: u-boot at lists.denx.de
Date: Thursday, August 14, 2008, 6:35 PMQuoted 2 lines · Fundu
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i'm using a the taishan board u-boot
1.2.0 and
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linux 2.4
Uh, OK. Those are both pretty darn old by
now.....
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does u-boot-1.2.0 pass a flatten device tree
to the
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kernel ?
Maybe.
how do i make confirm this ?
TIAI believe the 4xx boards were probably not using FDT back then.
You can confirm by "help bootm" -- if it only takes the kernel
addy and the optional ramdisk addy, then it is non-FDT.But whether or not u-boot is FDT capable is pretty much moot
point if you are on a v2.4.x kernel, as they don't use FDT.P.
Quoted 9 lines
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[U-Boot] Flatten device tree & PPC linu
Dear Fundu,
Quoted 3 lines · In message <[email protected]> you wrote:
Thanks for clearing that up.
One other question, if i update to u-boot 1.3.4 or whatever is the latest, can i configure so that i doesn't use FDT to boot kernel ?
You don't have to configure that - it just depoends on how you boot the Linux kenrel image - either you pass a device tree address (as the third argument to the bootm command), or you don't.
Best regards,
Wolfgang Denk
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-- Wernher von Braun[U-Boot] Flatten device tree & PPC linu
Quoted 10 lines · Wolfgang Denk
Dear Fundu,
Quoted 3 lines · In message <[email protected]> you wrote:
Thanks for clearing that up.
One other question, if i update to u-boot 1.3.4 or whatever is the latest, can i configure so that i doesn't use FDT to boot kernel ?
You don't have to configure that - it just depoends on how you boot the Linux kenrel image - either you pass a device tree address (as the third argument to the bootm command), or you don't.
True. But if your question was really "Can I have PowerPC board boot without a Device Tree?", then no, you can't unless you work really hard in the wrong direction. :-)
All PowerPC converted to using the Device Tree for booting over two years ago now.
jdl