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