1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <config.h>
8*4882a593Smuzhiyun #include <linux/kernel.h>
9*4882a593Smuzhiyun #include <linux/io.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include "../sc-regs.h"
12*4882a593Smuzhiyun #include "../sg-regs.h"
13*4882a593Smuzhiyun #include "debug-uart.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #define UNIPHIER_LD6B_UART_CLK 88888888
16*4882a593Smuzhiyun
uniphier_ld6b_debug_uart_init(void)17*4882a593Smuzhiyun unsigned int uniphier_ld6b_debug_uart_init(void)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun u32 tmp;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun sg_set_iectrl(0);
22*4882a593Smuzhiyun sg_set_pinsel(135, 3, 8, 4); /* PORT10 -> TXD0 */
23*4882a593Smuzhiyun sg_set_pinsel(115, 0, 8, 4); /* TXD1 -> TXD1 */
24*4882a593Smuzhiyun sg_set_pinsel(113, 2, 8, 4); /* SBO0 -> TXD2 */
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun tmp = readl(SC_CLKCTRL);
27*4882a593Smuzhiyun tmp |= SC_CLKCTRL_CEN_PERI;
28*4882a593Smuzhiyun writel(tmp, SC_CLKCTRL);
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun return DIV_ROUND_CLOSEST(UNIPHIER_LD6B_UART_CLK, 16 * CONFIG_BAUDRATE);
31*4882a593Smuzhiyun }
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