| /* |
| * Copyright (c) 2018 Synopsys, Inc. All rights reserved. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/arch/cpu.h> |
| #include <zephyr/devicetree.h> |
| #include <zephyr/init.h> |
| |
| |
| #ifdef CONFIG_UART_NS16550 |
| |
| static int uart_ns16550_init(void) |
| { |
| |
| /* On ARC EM Starter kit board, |
| * send the UART the command to clear the interrupt |
| */ |
| #if DT_NODE_HAS_STATUS(DT_INST(0, ns16550), okay) |
| sys_write32(0, DT_REG_ADDR(DT_INST(0, ns16550))+0x4); |
| sys_write32(0, DT_REG_ADDR(DT_INST(0, ns16550))+0x10); |
| #endif /* DT_NODE_HAS_STATUS(DT_INST(0, ns16550), okay) */ |
| #if DT_NODE_HAS_STATUS(DT_INST(1, ns16550), okay) |
| sys_write32(0, DT_REG_ADDR(DT_INST(1, ns16550))+0x4); |
| sys_write32(0, DT_REG_ADDR(DT_INST(1, ns16550))+0x10); |
| #endif /* DT_NODE_HAS_STATUS(DT_INST(1, ns16550), okay) */ |
| |
| return 0; |
| } |
| |
| SYS_INIT(uart_ns16550_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT); |
| |
| #endif /* CONFIG_UART_NS16550 */ |
