Adding patch to kernel in oecore setup

Technical Support
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1

working on oe-core setup to build a custom layer. in that layer i created
recipes-kernel/linux/linux-toradex_4.4.bbappend

FILESEXTRAPATHS_prepend := "${THISDIR}/linux-toradex_4.4:"
SRC_URI = "file://0001-rtc_fbtft.patch \
           file://defconfig"

0001-rtc_fbtft.patch and defconfig has been attached

i was following this link to modify rtc driver from 1307 to ds3232 and include a driver from statging area

link text

and then i run bitbake -f -c compile linux-toradex

after that i get this error

ERROR: linux-toradex-4.4-2.7.5 do_patch: Command Error: 'quilt --quiltrc /home/saurabh/oe-core_later/build/tmp-glibc/sysroots/x86_64-linux/etc/quiltrc push' exited with 0  Output:
Applying patch 0001-rtc_fbtft.patch
can't find file to patch at input line 15
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|From 0b7d2e27f4062f6d33f5245f1c2dc3c134e43c2b Mon Sep 17 00:00:00 2001
|From: SAURABH 
|Date: Thu, 15 Mar 2018 13:04:25 +0530
|Subject: [PATCH] rtc_fbtft
|
|Signed-off-by: SAURABH 
|---
| arch/arm/boot/dts/vf-colibri-eval-v3.dtsi | 6 ++++--
| 1 file changed, 4 insertions(+), 2 deletions(-)
|
|diff --git a/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi b/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
|index 8392dcd..287cb44 100644
|--- a/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
|+++ b/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
--------------------------
No file to patch.  Skipping patch.
1 out of 1 hunk ignored
Patch 0001-rtc_fbtft.patch does not apply (enforce with -f)
ERROR: linux-toradex-4.4-2.7.5 do_patch: Function failed: patch_do_patch
ERROR: Logfile of failure stored in: /home/saurabh/oe-core_later/build/tmp-glibc/work/colibri_vf-angstrom-linux-gnueabi/linux-toradex/4.4-2.7.5/temp/log.do_patch.12015
ERROR: Task (/home/saurabh/oe-core_later/build/../layers/meta-freescale-3rdparty/recipes-kernel/linux/linux-toradex_4.4.bb:do_patch) failed with exit code '1'

am i missing something in my bbappend file… ?

2

hi saurabh

check this out to see an example of a recipe.
By the way, if you just want to change the device tree file and change the config you can also check for this site to do the build much faster.

3

thanks for the reference link. eventually I am able to modify my kernel configuration with the following bbappend file from my custom layer.

FILESEXTRAPATHS_prepend := "${THISDIR}/linux-toradex_4.4:"

//Trying to modify through 

SRC_URI += "file://3232.cfg"

do_configure_append() {

cat ../*.cfg >> ${B}/.config
 
}

and 3232.cfg just contains

CONFIG_RTC_DRV_DS3232=y
CONFIG_STAGING=y
CONFIG_FB_TFT=y

so this worked for me