Resolved! RTS keeps high
I'm using a SoM with a STM32MP157C. I've connected a LTE modem to uart7, its connected with a 4-wire uart, going trough a level shifter. The device tree contains the following:uart7_pins_mx: uart7_mx-0 { pins1 { pinmux = <STM32_PINMUX('E', 7, AF...