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https://github.com/AsahiLinux/u-boot
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30 lines
754 B
C
30 lines
754 B
C
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// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
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/*
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* Copyright (C) 2022, STMicroelectronics - All Rights Reserved
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*/
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#include <config.h>
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#include <debug_uart.h>
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#include <asm/io.h>
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#include <asm/arch/stm32.h>
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#include <linux/bitops.h>
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#define RCC_MP_APB1ENSETR (STM32_RCC_BASE + 0x0A00)
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#define RCC_MP_AHB4ENSETR (STM32_RCC_BASE + 0x0A28)
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#define GPIOG_BASE 0x50008000
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void board_debug_uart_init(void)
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{
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if (CONFIG_DEBUG_UART_BASE == STM32_UART4_BASE) {
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/* UART4 clock enable */
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setbits_le32(RCC_MP_APB1ENSETR, BIT(16));
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/* GPIOG clock enable */
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writel(BIT(6), RCC_MP_AHB4ENSETR);
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/* GPIO configuration for ST boards: Uart4 TX = G11 */
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writel(0xffbfffff, GPIOG_BASE + 0x00);
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writel(0x00006000, GPIOG_BASE + 0x24);
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}
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}
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