Commit 62c1594d authored by Erwan Le Ray's avatar Erwan Le Ray Committed by Alexandre Torgue
Browse files

ARM: debug: stm32: add UART early console support for STM32MP1 



Add support of early console for STM32MP1. Default UART instance is UART4,
but other UART instances can be configured by setting physical and virtual
base addresses in menuconfig.

Signed-off-by: default avatarErwan Le Ray <erwan.leray@st.com>
Signed-off-by: default avatarAlexandre Torgue <alexandre.torgue@st.com>
parent 33cab895

arch/arm/Kconfig.debug

+14 −0
Original line number Diff line number Diff line
@@ -1235,6 +1235,18 @@ choice 


		  If unsure, say N.



	config STM32MP1_DEBUG_UART

		bool "Use STM32MP1 UART for low-level debug"

		depends on MACH_STM32MP157

		select DEBUG_STM32_UART

		help

		  Say Y here if you want kernel low-level debugging support

		  on STM32MP1 based platforms, wich default UART is wired on

		  UART4, but another UART instance can be selected by modifying

		  CONFIG_DEBUG_UART_PHYS and CONFIG_DEBUG_UART_VIRT.



		  If unsure, say N.



	config TEGRA_DEBUG_UART_AUTO_ODMDATA

		bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"

		depends on ARCH_TEGRA
@@ -1633,6 +1645,7 @@ config DEBUG_UART_PHYS 
	default 0x3e000000 if DEBUG_BCM_KONA_UART

	default 0x3f201000 if DEBUG_BCM2836

	default 0x4000e400 if DEBUG_LL_UART_EFM32

	default 0x40010000 if STM32MP1_DEBUG_UART

	default 0x40011000 if STM32F4_DEBUG_UART || STM32F7_DEBUG_UART || \

				STM32H7_DEBUG_UART

	default 0x40028000 if DEBUG_AT91_SAMV7_USART1
@@ -1795,6 +1808,7 @@ config DEBUG_UART_VIRT 
	default 0xfcfe8600 if DEBUG_BCM63XX_UART

	default 0xfd000000 if DEBUG_SPEAR3XX || DEBUG_SPEAR13XX

	default 0xfd883000 if DEBUG_ALPINE_UART0

	default 0xfe010000 if STM32MP1_DEBUG_UART

	default 0xfe017000 if DEBUG_MMP_UART2

	default 0xfe018000 if DEBUG_MMP_UART3

	default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART

arch/arm/include/debug/stm32.S

+2 −1
Original line number Diff line number Diff line
@@ -9,7 +9,8 @@ 
#define STM32_USART_TDR_OFF		0x04

#endif



#if defined(CONFIG_STM32F7_DEBUG_UART) || defined(CONFIG_STM32H7_DEBUG_UART)

#if defined(CONFIG_STM32F7_DEBUG_UART) || defined(CONFIG_STM32H7_DEBUG_UART) || \

	defined(CONFIG_STM32MP1_DEBUG_UART)

#define STM32_USART_SR_OFF		0x1C

#define STM32_USART_TDR_OFF		0x28

#endif