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ARM: stm32: Add STM32MP13xx debug UART initialization

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Add default STM32MP13xx debug UART initialization. This is similar
to STM32MP15xx debug UART initialization, except the RCC registers
are at different offsets and the UART pinmux pins are different.

Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>
This commit is contained in:
Marek Vasut 2025-06-30 02:10:31 +02:00 committed by Patrice Chotard
parent 61d353dc92
commit bd50cb5cde
1 changed files with 18 additions and 3 deletions
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21
board/st/stm32mp1/debug_uart.c
View File

@ -9,17 +9,32 @@
#include <asm/arch/stm32.h>
#include <linux/bitops.h>
#if IS_ENABLED(CONFIG_STM32MP13X)
#define RCC_MP_APB1ENSETR (STM32_RCC_BASE + 0x0700)
#define RCC_MP_AHB4ENSETR (STM32_RCC_BASE + 0x0768)
#elif IS_ENABLED(CONFIG_STM32MP15X)
#define RCC_MP_APB1ENSETR (STM32_RCC_BASE + 0x0A00)
#define RCC_MP_AHB4ENSETR (STM32_RCC_BASE + 0x0A28)
#endif
#define GPIOA_BASE 0x50002000
#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));
if (CONFIG_DEBUG_UART_BASE != STM32_UART4_BASE)
return;
/* UART4 clock enable */
setbits_le32(RCC_MP_APB1ENSETR, BIT(16));
if (IS_ENABLED(CONFIG_STM32MP13X)) {
/* GPIOA clock enable */
writel(BIT(0), RCC_MP_AHB4ENSETR);
/* GPIO configuration for DH boards: Uart4 TX = A9 */
writel(0xfffbffff, GPIOA_BASE + 0x00);
writel(0x00000080, GPIOA_BASE + 0x24);
} else if (IS_ENABLED(CONFIG_STM32MP15X)) {
/* GPIOG clock enable */
writel(BIT(6), RCC_MP_AHB4ENSETR);
/* GPIO configuration for ST boards: Uart4 TX = G11 */