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ARM: stm32: debug: add low-level debug support

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This adds low-level debug support on USART1 for STM32F4
and STM32F7.
Compiled via 'CONFIG_DEBUG_LL' and 'CONFIG_EARLY_PRINTK'.
Enabled via 'earlyprintk' in bootargs.

Signed-off-by: Gerald Baeza <gerald.baeza@st.com>
Signed-off-by: Bich Hemon <bich.hemon@st.com>
Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Gerald Baeza
2017-07-27 16:50:20 +00:00
committed by Olof Johansson
parent ccda4af0f4
commit d88bb418b7
2 changed files with 68 additions and 0 deletions
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27
arch/arm/Kconfig.debug
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@@ -1192,6 +1192,28 @@ choice
If unsure, say N.
config STM32F4_DEBUG_UART
bool "Use STM32F4 UART for low-level debug"
depends on ARCH_STM32
select DEBUG_STM32_UART
help
Say Y here if you want kernel low-level debugging support
on STM32F4 based platforms, which default UART is wired on
USART1.
If unsure, say N.
config STM32F7_DEBUG_UART
bool "Use STM32F7 UART for low-level debug"
depends on ARCH_STM32
select DEBUG_STM32_UART
help
Say Y here if you want kernel low-level debugging support
on STM32F7 based platforms, which default UART is wired on
USART1.
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
@@ -1476,6 +1498,10 @@ config DEBUG_STI_UART
bool
depends on ARCH_STI
config DEBUG_STM32_UART
bool
depends on ARCH_STM32
config DEBUG_SIRFSOC_UART
bool
depends on ARCH_SIRF
@@ -1525,6 +1551,7 @@ config DEBUG_LL_INCLUDE
default "debug/s5pv210.S" if DEBUG_S5PV210_UART
default "debug/sirf.S" if DEBUG_SIRFSOC_UART
default "debug/sti.S" if DEBUG_STI_UART
default "debug/stm32.S" if DEBUG_STM32_UART
default "debug/tegra.S" if DEBUG_TEGRA_UART
default "debug/ux500.S" if DEBUG_UX500_UART
default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT