drivers: net: ot: Select UART_INTERRUPT_DRIVEN with UART RCP communication

The Openthread communication with RCP via UART (with HDLC protocol) is
performed with serial driver using interrupts. As it was tested with
echo_client sample program, the
CONFIG_SHELL_BACKEND_SERIAL_API_INTERRUPT_DRIVEN is defined by default for
it. This config selects aforementioned UART_INTERRUPT_DRIVEN.

Problem starts when somebody wants to integrated the driver as a standalone
one (without echo_client) as a part of user application.
In this situation the UART_INTERRUPT_DRIVEN is not defined by default and
there is no serial communication between RCP and HOST devices.

Signed-off-by: Lukasz Majewski <[email protected]>

Author: Lukasz Majewski

drivers/hdlc_rcp_if/Kconfig.uart

@@ -12,6 +12,7 @@ config HDLC_RCP_IF_UART
 	bool "UART HDLC interface for Zephyr Openthread RCP host"
 	default y
 	depends on DT_HAS_UART_HDLC_RCP_IF_ENABLED
+	depends on UART_INTERRUPT_DRIVEN
 
 config OPENTHREAD_HDLC_RCP_IF_UART_RX_RING_BUFFER_SIZE
 	int "Set HDLC RCP IF UART RX ring buffer size"