Re: [yocto] should a BSP layer *really* ever need additional layers to be functional?
On Thu, 23 Mar 2017, Josef Holzmayr wrote: > Hi, > > On 23.03.2017 11:35, Robert P. J. Day wrote: > > i always thought that using nothing more than a BSP layer (plus, of > > course, the underlying OE layers) should allow you to get to the > > command line. is that not true? > > I don't think that this generally holds true, as it would lead to > significant duplication. Imagine a board based off something already > in meta-ti or meta-intel. And maybe just needing a slightly modified > bootloader. true, but the wording in the BSP Guide is: "Some BSPs require additional layers on top of the BSP's root layer in ^ order to be functional. " that particular phrasing suggests that perhaps what's needed is more user space content of some kind. perhaps rewording that to say that a BSP layer might be based on top of other layers as a starting point would be clearer. rday -- Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday -- ___ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
Re: [yocto] should a BSP layer *really* ever need additional layers to be functional?
Hi, On 23.03.2017 11:35, Robert P. J. Day wrote: i always thought that using nothing more than a BSP layer (plus, of course, the underlying OE layers) should allow you to get to the command line. is that not true? I don't think that this generally holds true, as it would lead to significant duplication. Imagine a board based off something already in meta-ti or meta-intel. And maybe just needing a slightly modified bootloader. Greetz, -- Josef Holzmayr Software Developer Embedded Systems Tel: +49 8444 9204-48 Fax: +49 8444 9204-50 R-S-I Elektrotechnik GmbH & Co. KG Woelkestrasse 11 D-85301 Schweitenkirchen www.rsi-elektrotechnik.de ——— Amtsgericht Ingolstadt – GmbH: HRB 191328 – KG: HRA 170393 Geschäftsführer: Dr.-Ing. Michael Sorg, Dipl.-Ing. Franz Sorg Ust-IdNr: DE 128592548 _ Amtsgericht Ingolstadt - GmbH: HRB 191328 - KG: HRA 170363 Geschäftsführer: Dr.-Ing. Michael Sorg, Dipl.-Ing. Franz Sorg USt-IdNr.: DE 128592548 -- ___ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
[yocto] should a BSP layer *really* ever need additional layers to be functional?
perusing current BSP Guide: "Some BSPs require additional layers on top of the BSP's root layer in order to be functional. For these cases, you also need to add those layers to the BBLAYERS variable in order to build the BSP." really? should a properly-designed BSP layer need additional layers to simply boot a simple image (say, core-image-minimal) to the command line? i always thought that using nothing more than a BSP layer (plus, of course, the underlying OE layers) should allow you to get to the command line. is that not true? rday -- Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday -- ___ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
