u-boot/arch/arm/mach-uniphier/debug-uart/debug-uart-ld4.c

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/*
* Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <linux/kernel.h>
#include "../sg-regs.h"
#include "debug-uart.h"
#define UNIPHIER_LD4_UART_CLK 36864000
unsigned int uniphier_ld4_debug_uart_init(void)
{
sg_set_iectrl(0);
sg_set_pinsel(88, 1, 8, 4); /* HSDOUT6 -> TXD0 */
return DIV_ROUND_CLOSEST(UNIPHIER_LD4_UART_CLK, 16 * CONFIG_BAUDRATE);
}