1 /*
2 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7 #include <config.h>
8 #include <linux/kernel.h>
9 #include <linux/io.h>
10
11 #include "../sc-regs.h"
12 #include "../sg-regs.h"
13 #include "debug-uart.h"
14
15 #define UNIPHIER_PXS2_UART_CLK 88888888
16
uniphier_pxs2_debug_uart_init(void)17 unsigned int uniphier_pxs2_debug_uart_init(void)
18 {
19 u32 tmp;
20
21 sg_set_iectrl(0);
22 sg_set_pinsel(217, 8, 8, 4); /* TXD0 -> TXD0 */
23 sg_set_pinsel(115, 8, 8, 4); /* TXD1 -> TXD1 */
24 sg_set_pinsel(113, 8, 8, 4); /* TXD2 -> TXD2 */
25 sg_set_pinsel(219, 8, 8, 4); /* TXD3 -> TXD3 */
26
27 tmp = readl(SC_CLKCTRL);
28 tmp |= SC_CLKCTRL_CEN_PERI;
29 writel(tmp, SC_CLKCTRL);
30
31 return DIV_ROUND_CLOSEST(UNIPHIER_PXS2_UART_CLK, 16 * CONFIG_BAUDRATE);
32 }
33