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