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

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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: Erwan Le Ray <erwan.leray@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
This commit is contained in:
Erwan Le Ray 2020-02-03 15:04:25 +01:00 committed by Alexandre Torgue
parent 33cab8954a
commit 62c1594d38
2 changed files with 16 additions and 1 deletions
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14
arch/arm/Kconfig.debug
View File

@ -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

3
arch/arm/include/debug/stm32.S
View File

@ -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