1// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
2/*
3 * Copyright (C) 2022, STMicroelectronics - All Rights Reserved
4 */
5
6#include <config.h>
7#include <debug_uart.h>
8#include <asm/io.h>
9#include <asm/arch/stm32.h>
10#include <linux/bitops.h>
11
12#define RCC_MP_APB1ENSETR (STM32_RCC_BASE + 0x0A00)
13#define RCC_MP_AHB4ENSETR (STM32_RCC_BASE + 0x0A28)
14
15#define GPIOG_BASE 0x50008000
16
17void board_debug_uart_init(void)
18{
19	if (CONFIG_DEBUG_UART_BASE == STM32_UART4_BASE) {
20		/* UART4 clock enable */
21		setbits_le32(RCC_MP_APB1ENSETR, BIT(16));
22
23		/* GPIOG clock enable */
24		writel(BIT(6), RCC_MP_AHB4ENSETR);
25		/* GPIO configuration for ST boards: Uart4 TX = G11 */
26		writel(0xffbfffff, GPIOG_BASE + 0x00);
27		writel(0x00006000, GPIOG_BASE + 0x24);
28	}
29}
30