1srcs-$(CFG_PL011) += pl011.c 2srcs-$(CFG_GIC) += gic.c 3srcs-$(CFG_SUNXI_UART) += sunxi_uart.c 4srcs-$(CFG_8250_UART) += serial8250_uart.c 5srcs-$(CFG_16550_UART) += ns16550.c 6