Got it working. Final configuration:
tcbuild.yaml
# Documentation https://developer.toradex.com/torizon/os-customization/torizoncore-builder-workflow/#customizing-the-configuration-file
# Configuration file outline:
# ⚠️ Mouse hover to the properties to see documentation
# ⚠️ ctrl+space inside an object or property to get the autocompletion tips
input:
easy-installer:
toradex-feed:
version: "6.7.0"
release: quarterly
machine: verdin-imx8mp
distro: torizon
variant: torizon-core-docker
build-number: 18
customization:
splash-screen: my_splash_screen.png
device-tree:
include-dirs:
- linux/include
- linux/arch/arm64/boot/dts/freescale/
custom: linux/arch/arm64/boot/dts/freescale/imx8mp-verdin-wifi-mallow.dts
overlays:
add:
- device-trees/overlays/verdin-imx8mp_hdmi_overlay.dts
- overlays/gpio_pullup.dts
output:
easy-installer:
local: my-os
# bundle:
# compose-file: docker-compose.yml
ostree:
branch: my-os
commit-subject: my-os
And gpio_pullup.dts:
/*
GPIO control bits: PE HYS PUE ODE FSEL X DSE1 DSE0 X
-----------------
Pull Select Field : PE_0_PULL_DISABLE / PE_1_PULL_ENABLE
Input Select Field : HYS_0_CMOS / HYS_1_SCHMITT
Pull Up / Down Config. : PUE_0_WEAK_PULL_DOWN / PUE_1_WEAK_PULL_UP
Open Drain Field : ODE_0_OPEN_DRAIN_DISABLE / ODE_1_OPEN_DRAIN_ENABLE
Slew Rate Field : FSEL_0_SLOW_SLEW_RATE / FSEL_1_FAST_SLEW_RATE
Drive Strength Field : DSE_X1 / DSE_X2 / DSE_X4 /DSE_X6
-----------------
1C4 hexadecimal = 0b111000100 binary (PE_1_PULL_ENABLE | HYS+1+SCHMITT | PUE_1_WEAK_PULL_UP | ODE_0_OPEN_DRAIN_DISABLE | FSEL_0_SLOW_SLEW_RATE | DSE_X2 )
*/
/dts-v1/;
/plugin/;
#include <dt-bindings/gpio/gpio.h>
#include "imx8mp-pinfunc.h"
/ {
compatible = "toradex,verdin-imx8mp-nonwifi-dahlia",
"toradex,verdin-imx8mp-nonwifi",
"toradex,verdin-imx8mp",
"fsl,imx8mp";
};
&pinctrl_gpio1 {
fsl,pins = <MX8MP_IOMUXC_GPIO1_IO00__GPIO1_IO00 0x1c4>;
};
&pinctrl_gpio2 {
fsl,pins = <MX8MP_IOMUXC_GPIO1_IO01__GPIO1_IO01 0x1c4>;
};
&pinctrl_gpio3 {
fsl,pins = <MX8MP_IOMUXC_GPIO1_IO05__GPIO1_IO05 0x1c4>;
};
&pinctrl_gpio4 {
fsl,pins = <MX8MP_IOMUXC_GPIO1_IO06__GPIO1_IO06 0x1c4>;
};
A final comment:
The parameter: clear: false on tcbuild.yaml device-tree session seens not to be working. So it clears all overlays from custom dts on any condition. I had to add HDMI overlay again in order to have my HDMI display working again. I suggest a check/fix on this to engineering.
Anyway thanks for supporting.