Resolved! STM32MP157 UART8 Interrupt issue
I've assigned the UART8 device in the devicetree of the linux kernel (OpenSTLinux):&pinctrl { // ... uart8_pins: uart8-0 { pins1 { pinmux = <STM32_PINMUX('E', 0, AF8)>; /* UART8_RX */ bias-disable; }; pins2 { pinmux = <STM32_...