From c37a6684818d41051c54f814863429536aa972be Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Tue, 11 Oct 2022 16:44:26 +0200 Subject: stm32mp: fix compilation issue with DEBUG_UART Fix the compilation issue when CONFIG_DEBUG_UART is activated drivers/serial/serial_stm32.o: in function `debug_uart_init': drivers/serial/serial_stm32.c:291: undefined reference to \ `board_debug_uart_init' The board_debug_uart_init is needed for SPL boot, called in cpu.c::mach_cpu_init(); it is defined in board/st/stm32mp1/spl.c. But with the removal #ifdefs patch, the function debug_uart_init() is always compiled even if not present in the final U-Boot image. This patch adds a file to provided this function when DEBUG_UART and SPL are activated. Fixes: c8b2eef52b6c ("stm32mp15: tidy up #ifdefs in cpu.c") Signed-off-by: Patrick Delaunay Reviewed-by: Patrice Chotard --- board/st/stm32mp1/debug_uart.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 board/st/stm32mp1/debug_uart.c (limited to 'board/st/stm32mp1/debug_uart.c') diff --git a/board/st/stm32mp1/debug_uart.c b/board/st/stm32mp1/debug_uart.c new file mode 100644 index 00000000000..24e3f9f2201 --- /dev/null +++ b/board/st/stm32mp1/debug_uart.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause +/* + * Copyright (C) 2022, STMicroelectronics - All Rights Reserved + */ + +#include +#include +#include +#include +#include + +#define RCC_MP_APB1ENSETR (STM32_RCC_BASE + 0x0A00) +#define RCC_MP_AHB4ENSETR (STM32_RCC_BASE + 0x0A28) + +#define GPIOG_BASE 0x50008000 + +void board_debug_uart_init(void) +{ + if (CONFIG_DEBUG_UART_BASE == STM32_UART4_BASE) { + /* UART4 clock enable */ + setbits_le32(RCC_MP_APB1ENSETR, BIT(16)); + + /* GPIOG clock enable */ + writel(BIT(6), RCC_MP_AHB4ENSETR); + /* GPIO configuration for ST boards: Uart4 TX = G11 */ + writel(0xffbfffff, GPIOG_BASE + 0x00); + writel(0x00006000, GPIOG_BASE + 0x24); + } +} -- cgit v1.2.3