| // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause |
| /* |
| * Copyright (C) 2018, STMicroelectronics - All Rights Reserved |
| */ |
| |
| #include <common.h> |
| #include <asm/io.h> |
| #include <linux/bitops.h> |
| #include <linux/delay.h> |
| |
| #ifdef CONFIG_DEBUG_UART_BOARD_INIT |
| void board_debug_uart_init(void) |
| { |
| #if (CONFIG_DEBUG_UART_BASE == STM32_UART4_BASE) |
| |
| #define RCC_MP_APB1ENSETR (STM32_RCC_BASE + 0x0A00) |
| #define RCC_MP_AHB4ENSETR (STM32_RCC_BASE + 0x0A28) |
| |
| /* UART4 clock enable */ |
| setbits_le32(RCC_MP_APB1ENSETR, BIT(16)); |
| |
| #define GPIOG_BASE 0x50008000 |
| /* GPIOG clock enable */ |
| writel(BIT(6), RCC_MP_AHB4ENSETR); |
| /* GPIO configuration for EVAL board |
| * => Uart4 TX = G11 |
| */ |
| writel(0xffbfffff, GPIOG_BASE + 0x00); |
| writel(0x00006000, GPIOG_BASE + 0x24); |
| #else |
| |
| #error("CONFIG_DEBUG_UART_BASE: not supported value") |
| |
| #endif |
| } |
| #endif |