| /* |
| * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <config.h> |
| #include <linux/kernel.h> |
| #include <linux/io.h> |
| |
| #include "../sc-regs.h" |
| #include "../sg-regs.h" |
| #include "debug-uart.h" |
| |
| #define UNIPHIER_PRO4_UART_CLK 73728000 |
| |
| unsigned int uniphier_pro4_debug_uart_init(void) |
| { |
| u32 tmp; |
| |
| sg_set_iectrl(0); |
| sg_set_pinsel(128, 0, 4, 8); /* TXD0 -> TXD0 */ |
| |
| writel(1, SG_LOADPINCTRL); |
| |
| tmp = readl(SC_CLKCTRL); |
| tmp |= SC_CLKCTRL_CEN_PERI; |
| writel(tmp, SC_CLKCTRL); |
| |
| return DIV_ROUND_CLOSEST(UNIPHIER_PRO4_UART_CLK, 16 * CONFIG_BAUDRATE); |
| } |