in diesem Abschnitt habe ich ein paar von mir häufig verwendete Code-Schnipsel hinterlegt. vielleicht ist der eine oder andere hilfreich ;)

GIT SVN

bash

javascript

mysql

Python

PHP

VSCode

$(warning $$src is [${src}])

string-manipulation:

https://ftp.gnu.org/old-gnu/Manuals/make-3.79.1/html_chapter/make_8.html#SEC77

Cc: stable@vger.kernel.org

in den Signed-Off-Bereich

Quelle: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html

Add options:

CONFIG_DYNAMIC_DEBUG=y
CONFIG_DEBUG_FS=y

And enable it from userspace (here all for network drivers):

echo "file drivers/net/* +p"> /sys/kernel/debug/dynamic_debug/control    

printk(KERN_ALERT "DEBUG: Passed %s %d val:0x%0x\n",__FUNCTION__,__LINE__,(unsigned int)val);

dev_err(dev,"DEBUG: Passed %s %d val:0x%x\n",__FUNCTION__,__LINE__,val);

//register params
static int startreg=-1;
module_param( startreg, int, S_IRUGO );
static int regcount=10;
module_param( regcount, int, S_IRUGO );

//look for module-name
static struct mdio_driver realtek_mdio_driver = {
	.mdiodrv.driver = {
		.name = "realtek-mdio",//<<<<

//pass cmdline arguments
realtek-mdio.startreg=0x1300 realtek-mdio.regcount=50

• http://embeddedguruji.blogspot.com/2018/12/passing-parameters-to-linux-device.html
• https://ezs.kr.hsnr.de/TreiberBuch/html/sec.treiberparam.html

• elixir@bootlin
• Patchwork
  • Mediatek
  • Rockchip
  • dt-bindings
• GIT:
  • stable torvalds linux-next
  • net net-next
  • drm mtk nextdrm
  • neues mediatek repo (altes mtk dts next)
  • Rockchip SoC/DTS
  • dt-bindings
  • pinctrl-next

#define DEBUG 1

vor „#include <common.h>“ um vorhandene/zusätzliche debug() anzuzeigen

debug("## %s:%d...\n", __FILE__,__LINE__);

oder manuell (wird immer angezeigt):

printf("%s:%d val:0x%0x\n",__FUNCTION__,__LINE__,(u32)val);

• elixir@bootlin
• Uboot-Patchwork Mailinglist Archiv
• uboot gitlab

http://thesoulofamachine.blogspot.com/2016/07/linux-dts-compilation-using-dtc-compiler.html

DTB dekompilieren:

sudo apt-get install device-tree-compiler

dtc -I dtb -O dts sun8i-h3-orangepi-pc.dtb -o /tmp/tmp.dts 
less /tmp/tmp.dts

#Alternative ohne temporäre Datei
dtc -I dtb -O dts ../build/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dtb | less

#aus sysfs
dtc -I fs -O dts /sys/firmware/devicetree/base | less

sudo apt install swig yamllint python3-pip python3-venv

python3 -m venv .venv
. .venv/bin/activate
pip3 install dtschema --upgrade
pip3 show dtschema

ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make dt_binding_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/ata/ahci-platform.yaml
ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make defconfig #dtbs_check need kernel-config
ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/ata/ahci-platform.yaml
ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make multi_v7_defconfig
ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/ata/ahci-platform.yaml

#maybe need to add dir to path
PATH=$PATH:~/.local/bin

Mapping wifi Eeprom data to pcie slot:

https://forum.banana-pi.org/t/802-11ac-module-gives-max-6dbi-transmitter-power/14238/23