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- // 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
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