What is "dsi-vdd-1v8-bl-en" and why it prevents me from using SPI2_MOSI on Orin?

Hi,
According to “Jetson AGX Orin Series Pin and Function Names Guide” and P3737_A04_Concept_schematics.pdf
pin F60 AKA SPI2_MOSI is connected to CAM_INT3 and should be available for use as SPI2_MOSI or GPIO,
but when I try:
sudo sh -c " echo 330 > /sys/class/gpio/export "
I get
I/O error
This is because this GPIO is being reserved for dsi-vdd-1v8-bl-en in file:
hardware/nvidia/platform/t23x/concord/kernel-dts/cvb/tegra234-p3737-fixed-regulator.dtsi
dsi_vdd_1v8_bl_en: regulator@116 {
compatible = “regulator-fixed”;
reg = <116>;
regulator-name = “dsi-vdd-1v8-bl-en”;
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
vin-supply = <&p3737_vdd_1v8_sys>;
gpio = <&tegra_aon_gpio TEGRA234_AON_GPIO(CC, 2) 0>; //CAM_INT3, GPIO_ACTIVE_HIGH == 0
enable-active-high;
};
What is this? I cannot find any dsi-vdd-1v8 in the schematics. Or is it inside SOM?
How can I use SPI2_MOSI line for my purposes?

Thank you

Hi,

It is just for some internal project. You could remove that regulator.

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.