[Buildroot] [PATCH v3 1/1] linux: allow firmware to be included in kernel

Sam Voss sam.voss at collins.com
Mon Apr 26 15:12:49 UTC 2021


On Sun, Apr 25, 2021 at 3:38 PM Yann E. MORIN <yann.morin.1998 at free.fr> wrote:
> Sam, All,
> On 2021-04-24 10:09 +0200, Yann E. MORIN spake thusly:
> > On 2021-04-23 13:58 -0500, Sam Voss spake thusly:
> > > Add functionality to use the kernel's built-in options to allow binary
> > > blobs to be included with the kernel. This is equivalent to the blobs
> > > existing in /lib/firmware, however are available earlier in the boot
> > > process. This may be useful in situations where a device probes before
> > > the rootfs is fully available (such as a squashfs not being loaded
> > > before a usb device probing).
> [--SNIP--]
> > These two are just copies of the kernel config options. We can't
> > reasonably have a Buildroot option for each of the kernel option.
> After reviewing this with other maintainers, and seeing that this is
> already pretty trivial to carry those options directly in the kernel's
> configuration, we've concluded that we do not need to have those two
> options in the Buildroot configuration.

Honestly, BR_BINARIES_DIR is exactly what was missing that drove me to
add this in the first place, because it didn't make sense having to
have a buildroot-specific relative path in the kernel configuration
for these items. Now that I know this exists, I'm fine with using that


Sam Voss | Sr. Software Engineer | Commercial Avionics
400 Collins Road NE, Cedar Rapids, Iowa 52498, USA
Tel: +1 319 263 4039
sam.voss at collins.com | collinsaerospace.com

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