* Device Tree
@ 2008-09-29 6:24 Sébastien Chrétien
2008-09-29 8:25 ` Sergei Shtylyov
` (2 more replies)
0 siblings, 3 replies; 15+ messages in thread
From: Sébastien Chrétien @ 2008-09-29 6:24 UTC (permalink / raw)
To: linuxppc-dev
Hello,
I have a question about Device Tree.
Is Device Tree found only only on Linux Powerpc ?
Thanks
Sébastien
^ permalink raw reply [flat|nested] 15+ messages in thread* Re: Device Tree 2008-09-29 6:24 Device Tree Sébastien Chrétien @ 2008-09-29 8:25 ` Sergei Shtylyov 2008-09-30 15:22 ` Matt Sealey 2008-09-29 8:25 ` Sergei Shtylyov 2008-09-29 8:51 ` Benjamin Herrenschmidt 2 siblings, 1 reply; 15+ messages in thread From: Sergei Shtylyov @ 2008-09-29 8:25 UTC (permalink / raw) To: Sébastien Chrétien; +Cc: linuxppc-dev Hello. Sébastien Chrétien wrote: > Hello, > I have a question about Device Tree. > Is Device Tree found only only on Linux Powerpc ? Not only Linux as it's a part of Open Firmware which is also used at least on SPARC. WBR, Sergei ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-09-29 8:25 ` Sergei Shtylyov @ 2008-09-30 15:22 ` Matt Sealey 2008-09-30 22:30 ` Gerald Van Baren 0 siblings, 1 reply; 15+ messages in thread From: Matt Sealey @ 2008-09-30 15:22 UTC (permalink / raw) To: Sergei Shtylyov; +Cc: Sébastien Chrétien, linuxppc-dev Sergei Shtylyov wrote: > Hello. > > Sébastien Chrétien wrote: >> Hello, >> I have a question about Device Tree. >> Is Device Tree found only only on Linux Powerpc ? > > Not only Linux as it's a part of Open Firmware which is also used at > least on SPARC. The Toshiba TOPAS910 ARM development board also runs Open Firmware and contains patches to support OF device trees. I dare say there might be an x86 box or two out there, too. But they have ACPI tables too which is far more common.. -- Matt Sealey <matt@genesi-usa.com> Genesi, Manager, Developer Relations ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-09-30 15:22 ` Matt Sealey @ 2008-09-30 22:30 ` Gerald Van Baren 2008-09-30 23:08 ` Matt Sealey 0 siblings, 1 reply; 15+ messages in thread From: Gerald Van Baren @ 2008-09-30 22:30 UTC (permalink / raw) To: Matt Sealey; +Cc: Sébastien Chrétien, linuxppc-dev Matt Sealey wrote: > > Sergei Shtylyov wrote: >> Hello. >> >> S=E9bastien Chr=E9tien wrote: >>> Hello, >>> I have a question about Device Tree. >>> Is Device Tree found only only on Linux Powerpc ? >> >> Not only Linux as it's a part of Open Firmware which is also used at >> least on SPARC. > > The Toshiba TOPAS910 ARM development board also runs Open Firmware and > contains patches to support OF device trees. > > I dare say there might be an x86 box or two out there, too. But they > have ACPI tables too which is far more common.. More than a box or two: lots of OLPC XOs out there now. ;-) <http://wiki.laptop.org/go/Open_Firmware> Best regards, gvb ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-09-30 22:30 ` Gerald Van Baren @ 2008-09-30 23:08 ` Matt Sealey 2008-10-01 3:24 ` Benjamin Herrenschmidt 0 siblings, 1 reply; 15+ messages in thread From: Matt Sealey @ 2008-09-30 23:08 UTC (permalink / raw) To: Gerald Van Baren; +Cc: hrétien, linuxppc-dev Gerald Van Baren wrote: > Matt Sealey wrote: >> >> The Toshiba TOPAS910 ARM development board also runs Open Firmware and >> contains patches to support OF device trees. >> >> I dare say there might be an x86 box or two out there, too. But they >> have ACPI tables too which is far more common.. > > More than a box or two: lots of OLPC XOs out there now. ;-) > <http://wiki.laptop.org/go/Open_Firmware> I was thinking more in a platform kind of numbers rather than a sales kind of numbers, but you're right. It's far more common than people might think at first glance. With x86 I am sure it would benefit the platform a little more if the OF support was in-line with the shared code between PPC and SPARC (and now I guess, ARM) but nevertheless it's an Open Firmware platform and something that appeared not too long ago. OF is still a going concern; if you want a nice flexible firmware, why not use it? Most of the implementations are open source (FirmWorks and CodeGen trees, and the Sun reference design) too. -- Matt Sealey <matt@genesi-usa.com> Genesi, Manager, Developer Relations ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-09-30 23:08 ` Matt Sealey @ 2008-10-01 3:24 ` Benjamin Herrenschmidt 2008-10-01 13:09 ` Matt Sealey 0 siblings, 1 reply; 15+ messages in thread From: Benjamin Herrenschmidt @ 2008-10-01 3:24 UTC (permalink / raw) To: Matt Sealey; +Cc: hrétien, =?UTF-8?B?U8OpYmFzdGllbiBD?=, linuxppc-dev On Tue, 2008-09-30 at 18:08 -0500, Matt Sealey wrote: > It's far more common than people might think at first glance. With x86 > I am sure it would benefit the platform a little more if the OF support > was in-line with the shared code between PPC and SPARC (and now I guess, > ARM) but nevertheless it's an Open Firmware platform and something that > appeared not too long ago. > > OF is still a going concern; if you want a nice flexible firmware, why > not use it? Most of the implementations are open source (FirmWorks and > CodeGen trees, and the Sun reference design) too. And SLOF :-) Cheers, Ben. ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-10-01 3:24 ` Benjamin Herrenschmidt @ 2008-10-01 13:09 ` Matt Sealey 2008-10-29 21:04 ` Sébastien Chrétien 0 siblings, 1 reply; 15+ messages in thread From: Matt Sealey @ 2008-10-01 13:09 UTC (permalink / raw) To: benh; +Cc: hrétien, "Sébastien C", linuxppc-dev Benjamin Herrenschmidt wrote: > On Tue, 2008-09-30 at 18:08 -0500, Matt Sealey wrote: >> It's far more common than people might think at first glance. With x86 >> I am sure it would benefit the platform a little more if the OF support >> was in-line with the shared code between PPC and SPARC (and now I guess, >> ARM) but nevertheless it's an Open Firmware platform and something that >> appeared not too long ago. >> >> OF is still a going concern; if you want a nice flexible firmware, why >> not use it? Most of the implementations are open source (FirmWorks and >> CodeGen trees, and the Sun reference design) too. > > And SLOF :-) I guess OpenBIOS counts too :) -- Matt Sealey <matt@genesi-usa.com> Genesi, Manager, Developer Relations ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-10-01 13:09 ` Matt Sealey @ 2008-10-29 21:04 ` Sébastien Chrétien 0 siblings, 0 replies; 15+ messages in thread From: Sébastien Chrétien @ 2008-10-29 21:04 UTC (permalink / raw) To: Matt Sealey; +Cc: "Sébastien C", linuxppc-dev Thank for your answers. Sébastien Matt Sealey a écrit : > Benjamin Herrenschmidt wrote: >> On Tue, 2008-09-30 at 18:08 -0500, Matt Sealey wrote: >>> It's far more common than people might think at first glance. With x86 >>> I am sure it would benefit the platform a little more if the OF support >>> was in-line with the shared code between PPC and SPARC (and now I >>> guess, >>> ARM) but nevertheless it's an Open Firmware platform and something that >>> appeared not too long ago. >>> >>> OF is still a going concern; if you want a nice flexible firmware, why >>> not use it? Most of the implementations are open source (FirmWorks and >>> CodeGen trees, and the Sun reference design) too. >> >> And SLOF :-) > > I guess OpenBIOS counts too :) > ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-09-29 6:24 Device Tree Sébastien Chrétien 2008-09-29 8:25 ` Sergei Shtylyov @ 2008-09-29 8:25 ` Sergei Shtylyov 2008-09-29 8:51 ` Benjamin Herrenschmidt 2 siblings, 0 replies; 15+ messages in thread From: Sergei Shtylyov @ 2008-09-29 8:25 UTC (permalink / raw) To: Sébastien Chrétien; +Cc: linuxppc-dev Hello. Sébastien Chrétien wrote: > I have a question about Device Tree. > Is Device Tree found only only on Linux Powerpc ? Not only Linux as it's a part of Open Firmware which is also used at least on SPARC. WBR, Sergei ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-09-29 6:24 Device Tree Sébastien Chrétien 2008-09-29 8:25 ` Sergei Shtylyov 2008-09-29 8:25 ` Sergei Shtylyov @ 2008-09-29 8:51 ` Benjamin Herrenschmidt 2 siblings, 0 replies; 15+ messages in thread From: Benjamin Herrenschmidt @ 2008-09-29 8:51 UTC (permalink / raw) To: Sébastien Chrétien; +Cc: linuxppc-dev On Mon, 2008-09-29 at 08:24 +0200, Sébastien Chrétien wrote: > Hello, > I have a question about Device Tree. > Is Device Tree found only only on Linux Powerpc ? Sparc also uses open firmware and shares some of the device-tree handling code with powerpc in linux. Other operating systems on those platforms also use it (AIX, Solaris, MacOS, ...) I think the proposed new Xilinx microblaze architecture also uses it, and at least on x86, the OLPC has an Open Firmware implementation though it doesn't use the device-tree the way we do currently on powerpc and sparc and has its own interface to the firmware. Ben. ^ permalink raw reply [flat|nested] 15+ messages in thread
* Device Tree @ 2008-09-09 15:43 Georg Schardt 2008-09-09 17:33 ` Josh Boyer 2008-09-09 18:11 ` John Linn 0 siblings, 2 replies; 15+ messages in thread From: Georg Schardt @ 2008-09-09 15:43 UTC (permalink / raw) To: linuxppc-embedded Hi, im searching for informations about the flatten device trees. the only thing i know is, that the device tree is a kind of data-structure which the bios or bootloader gives to the operation system. until now, i boot linux with uboot without a device tree, but newer kernel wants a devicetree, i think ?? i use a virtex4 board with an integrated powerpc how can i create the device tree file ? how must the linux kernel be configured ? is there a good internet page with informations ? thanks regards georg ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-09-09 15:43 Georg Schardt @ 2008-09-09 17:33 ` Josh Boyer 2008-09-09 18:11 ` John Linn 1 sibling, 0 replies; 15+ messages in thread From: Josh Boyer @ 2008-09-09 17:33 UTC (permalink / raw) To: Georg Schardt; +Cc: linuxppc-embedded On Tue, Sep 09, 2008 at 05:43:12PM +0200, Georg Schardt wrote: > Hi, > > im searching for informations about the flatten device trees. the only > thing i know is, that the device tree is a kind of data-structure which > the bios or bootloader gives to the operation system. > > until now, i boot linux with uboot without a device tree, but newer > kernel wants a devicetree, i think ?? > i use a virtex4 board with an integrated powerpc > > how can i create the device tree file ? > how must the linux kernel be configured ? > is there a good internet page with informations ? In the kernel, look at Documentation/powerpc/booting-without-of.txt You could also read the "A Symphony of Flavours: Using the device tree to describe embedded hardware" paper on page 27 of: http://www.linuxsymposium.org/2008/ols-2008-Proceedings-V2.pdf josh ^ permalink raw reply [flat|nested] 15+ messages in thread
* RE: Device Tree 2008-09-09 15:43 Georg Schardt 2008-09-09 17:33 ` Josh Boyer @ 2008-09-09 18:11 ` John Linn 2008-09-09 18:19 ` Georg Schardt 1 sibling, 1 reply; 15+ messages in thread From: John Linn @ 2008-09-09 18:11 UTC (permalink / raw) To: Georg Schardt, linuxppc-embedded Hi Georg, Our git tree, git://git.xilinx.com, has support for the ML405 board which is a V4 board. The following wiki page, http://xilinx.wikidot.com, shows how to generate a device tree for the kernel and other details you'll need. The kernel from our git tree is configured for the device tree using the default kernel configuration. The mainline kernel is now more up to date also as we got many of the changes into the mainline, but we are still working on some of the device drivers. Thanks, John > -----Original Message----- > From: linuxppc-embedded-bounces+john.linn=3Dxilinx.com@ozlabs.org [mailto:linuxppc-embedded- > bounces+john.linn=3Dxilinx.com@ozlabs.org] On Behalf Of Georg Schardt > Sent: Tuesday, September 09, 2008 9:43 AM > To: linuxppc-embedded@ozlabs.org > Subject: Device Tree > = > Hi, > = > im searching for informations about the flatten device trees. the only > thing i know is, that the device tree is a kind of data-structure which > the bios or bootloader gives to the operation system. > = > until now, i boot linux with uboot without a device tree, but newer > kernel wants a devicetree, i think ?? > i use a virtex4 board with an integrated powerpc > = > how can i create the device tree file ? > how must the linux kernel be configured ? > is there a good internet page with informations ? > = > = > thanks > regards > georg > _______________________________________________ > Linuxppc-embedded mailing list > Linuxppc-embedded@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-embedded This email and any attachments are intended for the sole use of the named r= ecipient(s) and contain(s) confidential information that may be proprietary= , privileged or copyrighted under applicable law. If you are not the intend= ed recipient, do not read, copy, or forward this email message or any attac= hments. Delete this email message and any attachments immediately. ^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Device Tree 2008-09-09 18:11 ` John Linn @ 2008-09-09 18:19 ` Georg Schardt 2008-09-09 18:24 ` John Linn 0 siblings, 1 reply; 15+ messages in thread From: Georg Schardt @ 2008-09-09 18:19 UTC (permalink / raw) To: John Linn; +Cc: linuxppc-embedded Hi John, yes, i found the wiki link in another post of you. nice , thank you. can you tell me how to generate the dts file in the EDK 10.2 ? i have read that the gen_mhs_devtree script is now integrated ? i see no menu-item or config option ? regards georg John Linn wrote: > Hi Georg, > > Our git tree, git://git.xilinx.com, has support for the ML405 board > which is a V4 board. The following wiki page, http://xilinx.wikidot.com, > shows how to generate a device tree for the kernel and other details > you'll need. > > The kernel from our git tree is configured for the device tree using the > default kernel configuration. > > The mainline kernel is now more up to date also as we got many of the > changes into the mainline, but we are still working on some of the > device drivers. > > Thanks, > John > > >> -----Original Message----- >> From: linuxppc-embedded-bounces+john.linn=xilinx.com@ozlabs.org >> > [mailto:linuxppc-embedded- > >> bounces+john.linn=xilinx.com@ozlabs.org] On Behalf Of Georg Schardt >> Sent: Tuesday, September 09, 2008 9:43 AM >> To: linuxppc-embedded@ozlabs.org >> Subject: Device Tree >> >> Hi, >> >> im searching for informations about the flatten device trees. the only >> thing i know is, that the device tree is a kind of data-structure >> > which > >> the bios or bootloader gives to the operation system. >> >> until now, i boot linux with uboot without a device tree, but newer >> kernel wants a devicetree, i think ?? >> i use a virtex4 board with an integrated powerpc >> >> how can i create the device tree file ? >> how must the linux kernel be configured ? >> is there a good internet page with informations ? >> >> >> thanks >> regards >> georg >> _______________________________________________ >> Linuxppc-embedded mailing list >> Linuxppc-embedded@ozlabs.org >> https://ozlabs.org/mailman/listinfo/linuxppc-embedded >> > > > This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. > > > ^ permalink raw reply [flat|nested] 15+ messages in thread
* RE: Device Tree 2008-09-09 18:19 ` Georg Schardt @ 2008-09-09 18:24 ` John Linn 0 siblings, 0 replies; 15+ messages in thread From: John Linn @ 2008-09-09 18:24 UTC (permalink / raw) To: Georg Schardt; +Cc: linuxppc-embedded It is not integrated into the EDK, you need to pull it from our git tree and use it from the EDK. -- John Here's part of the wiki page. Generating a Device Tree The Linux kernel from the git tree has device tree files, ml507.dts and ml405.dts, in the arch/powerpc/boot/dts directory which are designed to work with the hardware reference designs available from this site. Users who have a Xilinx board, ML405 or ML507, should build the Linux kernel using the provided dts file to get a solid baseline before generating a new device tree file. After a baseline is established, the new dts files can be compared to the existing to verify any differences. The page, Generating A Device Tree, has details on how to generate a device tree for the arch/powerpc Linux kernel. > -----Original Message----- > From: Georg Schardt [mailto:schardt@team-ctech.de] > Sent: Tuesday, September 09, 2008 12:19 PM > To: John Linn > Cc: linuxppc-embedded@ozlabs.org > Subject: Re: Device Tree > = > Hi John, > = > yes, i found the wiki link in another post of you. nice , thank you. > can you tell me how to generate the dts file in the EDK 10.2 ? i have > read that the gen_mhs_devtree script is now integrated ? i see no > menu-item or config option ? > = > regards > georg > = > = > = > John Linn wrote: > > Hi Georg, > > > > Our git tree, git://git.xilinx.com, has support for the ML405 board > > which is a V4 board. The following wiki page, http://xilinx.wikidot.com, > > shows how to generate a device tree for the kernel and other details > > you'll need. > > > > The kernel from our git tree is configured for the device tree using the > > default kernel configuration. > > > > The mainline kernel is now more up to date also as we got many of the > > changes into the mainline, but we are still working on some of the > > device drivers. > > > > Thanks, > > John > > > > > >> -----Original Message----- > >> From: linuxppc-embedded-bounces+john.linn=3Dxilinx.com@ozlabs.org > >> > > [mailto:linuxppc-embedded- > > > >> bounces+john.linn=3Dxilinx.com@ozlabs.org] On Behalf Of Georg Schardt > >> Sent: Tuesday, September 09, 2008 9:43 AM > >> To: linuxppc-embedded@ozlabs.org > >> Subject: Device Tree > >> > >> Hi, > >> > >> im searching for informations about the flatten device trees. the only > >> thing i know is, that the device tree is a kind of data-structure > >> > > which > > > >> the bios or bootloader gives to the operation system. > >> > >> until now, i boot linux with uboot without a device tree, but newer > >> kernel wants a devicetree, i think ?? > >> i use a virtex4 board with an integrated powerpc > >> > >> how can i create the device tree file ? > >> how must the linux kernel be configured ? > >> is there a good internet page with informations ? > >> > >> > >> thanks > >> regards > >> georg > >> _______________________________________________ > >> Linuxppc-embedded mailing list > >> Linuxppc-embedded@ozlabs.org > >> https://ozlabs.org/mailman/listinfo/linuxppc-embedded > >> > > > > > > This email and any attachments are intended for the sole use of the named recipient(s) and > contain(s) confidential information that may be proprietary, privileged or copyrighted under > applicable law. If you are not the intended recipient, do not read, copy, or forward this email > message or any attachments. Delete this email message and any attachments immediately. > > > > > > > = This email and any attachments are intended for the sole use of the named r= ecipient(s) and contain(s) confidential information that may be proprietary= , privileged or copyrighted under applicable law. If you are not the intend= ed recipient, do not read, copy, or forward this email message or any attac= hments. Delete this email message and any attachments immediately. ^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2008-10-29 21:04 UTC | newest] Thread overview: 15+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2008-09-29 6:24 Device Tree Sébastien Chrétien 2008-09-29 8:25 ` Sergei Shtylyov 2008-09-30 15:22 ` Matt Sealey 2008-09-30 22:30 ` Gerald Van Baren 2008-09-30 23:08 ` Matt Sealey 2008-10-01 3:24 ` Benjamin Herrenschmidt 2008-10-01 13:09 ` Matt Sealey 2008-10-29 21:04 ` Sébastien Chrétien 2008-09-29 8:25 ` Sergei Shtylyov 2008-09-29 8:51 ` Benjamin Herrenschmidt -- strict thread matches above, loose matches on Subject: below -- 2008-09-09 15:43 Georg Schardt 2008-09-09 17:33 ` Josh Boyer 2008-09-09 18:11 ` John Linn 2008-09-09 18:19 ` Georg Schardt 2008-09-09 18:24 ` John Linn
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