2 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
4 * SPDX-License-Identifier: GPL-2.0+
8 #include <linux/kernel.h>
11 #include "../bcu/bcu-regs.h"
12 #include "../sc-regs.h"
13 #include "../sg-regs.h"
14 #include "debug-uart.h"
16 #define UNIPHIER_SLD3_UART_CLK 36864000
18 unsigned int uniphier_sld3_debug_uart_init(void)
22 sg_set_pinsel(64, 1, 4, 4); /* TXD0 -> TXD0 */
24 writel(0x24440000, BCSCR5);
26 tmp = readl(SC_CLKCTRL);
27 tmp |= SC_CLKCTRL_CEN_PERI;
28 writel(tmp, SC_CLKCTRL);
30 return DIV_ROUND_CLOSEST(UNIPHIER_SLD3_UART_CLK, 16 * CONFIG_BAUDRATE);