[yocto] How to patch a driver in Linux source tree

[Greg Wilson-Lindberg]

Hi Jeremy,

I understand most of what you've got here, thanks, but I'm confused on the SRC_URI="<your kernel git path>…". Where should I look for the kernel git directory? I'm running Yocto with a mirror directory and that contains git directories for all of the major pieces, but I don't see one for the kernel. The kernel source is in tmp/work-shared/raspberrypi3/lernel-source, but that is not a git directory.

Any pointers would be appreciated.



Greg Wilson-Lindberg

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From: Jeremy Thien [mailto:jeremyt at adtecinc.com]
Sent: Friday, April 13, 2018 12:18 PM
To: Greg Wilson-Lindberg <GWilson at sakuraus.com>
Cc: yocto at yoctoproject.org
Subject: Re: [yocto] How to patch a driver in Linux source tree


SRC_URI = "<your kernel git path> file://your-patch-path<file:///\\your-patch-path>"

Then place the patch in files subdirectory.

So your tree should look something like:

<your layer>/recipes-kernel/linux/
  linux-raspberrypi_4.4.bbappend
  files/
    <your patch>

Instead of "files", it might be named "linux-raspberrypi".

Hope this helps,
Jeremy

On Fri, Apr 13, 2018 at 2:41 PM Greg Wilson-Lindberg <GWilson at sakuraus.com<mailto:GWilson at sakuraus.com>> wrote:

I'm working on a raspberry pi3 Yocto build from Qt's boot2qt project, it's running Yocto version 2.2.3, and Linux kernel 4.4.50. I need to back port some changes to a file in drivers/net/can/spi. I confused about where and how I set up the patch file.

I have a linux-raspberrypi_4.4.bbappend file. Do I put the patch file in that, and If so, how do I indicate the path to the file?



Thanks for the help and enlightenment,

Greg Wilson-Lindberg
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Jeremy Thien
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