/ { aliases { modem-uart = &usart2; modem = &modem; }; }; &gpioh { misc_fixed_usart2 { gpio-hog; gpios = <13 GPIO_ACTIVE_HIGH>; output-high; }; }; &gpdma1 { status = "okay"; }; /* BG95 */ &usart2 { pinctrl-0 = <&usart2_tx_pa2 &usart2_rx_pa3 &usart2_rts_pa1 &usart2_cts_pa0>; pinctrl-names = "default"; current-speed = <115200>; hw-flow-control; dmas = <&gpdma1 0 27 STM32_DMA_PERIPH_TX &gpdma1 1 26 STM32_DMA_PERIPH_RX>; dma-names = "tx", "rx"; status = "okay"; modem: modem { compatible = "zephyr,gsm-ppp"; status = "okay"; }; };