How to patch a driver in Linux source tree

How to patch a driver in Linux source tree

[Greg Wilson-Lindberg]

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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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Re: How to patch a driver in Linux source tree

[Jeremy Thien]

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SRC_URI = "<your kernel git 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@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
> --
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto
>
-- 
Jeremy Thien
Director of Engineering | Adtec Digital
jeremy.thien@adtecdigital.net | mobile: +1 (904) 910-1749

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Re: How to patch a driver in Linux source tree

[Greg Wilson-Lindberg]

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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

Principal Firmware Engineer | Sakura Finetek USA, Inc.



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From: Jeremy Thien [mailto:jeremyt@adtecinc.com]
Sent: Friday, April 13, 2018 12:18 PM
To: Greg Wilson-Lindberg <GWilson@sakuraus.com>
Cc: yocto@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@sakuraus.com<mailto:GWilson@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
--
_______________________________________________
yocto mailing list
yocto@yoctoproject.org<mailto:yocto@yoctoproject.org>
https://lists.yoctoproject.org/listinfo/yocto
--
Jeremy Thien
Director of Engineering | Adtec Digital
jeremy.thien@adtecdigital.net<mailto:jeremy.thien@adtecdigital.net> | mobile: +1 (904) 910-1749

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Re: How to patch a driver in Linux source tree

[Khem Raj]

On 4/13/18 11:41 AM, Greg Wilson-Lindberg 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?

yes.

SRC_URI += "file://yourpatch.patch"

also add

FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"

then create a directory called linux-raspberrypi parallel to where the 
bbappend is and put the yourpatch.patch inside that directory.


> 
> 
> Thanks for the help and enlightenment,
> 
> Greg Wilson-Lindberg
> 
> 

Re: How to patch a driver in Linux source tree

[Greg Wilson-Lindberg]

Thanks Khem,
That gave me what I needed.


Greg Wilson-Lindberg  
Principal Firmware Engineer | Sakura Finetek USA, Inc.  
 

> -----Original Message-----
> From: Khem Raj [mailto:raj.khem@gmail.com]
> Sent: Friday, April 13, 2018 05:53 PM
> To: Greg Wilson-Lindberg <GWilson@sakuraus.com>; yocto@yoctoproject.org
> Subject: Re: [yocto] How to patch a driver in Linux source tree
> 
> 
> 
> On 4/13/18 11:41 AM, Greg Wilson-Lindberg 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?
> 
> yes.
> 
> SRC_URI += "file://yourpatch.patch"
> 
> also add
> 
> FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
> 
> then create a directory called linux-raspberrypi parallel to where the bbappend is
> and put the yourpatch.patch inside that directory.
> 
> 
> >
> >
> > Thanks for the help and enlightenment,
> >
> > Greg Wilson-Lindberg
> >
> >