diff options
| author | Marek Vasut <[email protected]> | 2023-02-28 22:17:22 +0100 |
|---|---|---|
| committer | Marek Vasut <[email protected]> | 2023-03-18 12:04:02 +0100 |
| commit | 836d1bfffafb2cd1cdb9f2ee66dd764de223a5eb (patch) | |
| tree | 7bb00be41eb61f57b9b897580d73554ce4bc55e5 /drivers/serial/Kconfig | |
| parent | 5e12d7d00b1e8460689e8b9b2d7713630830c43c (diff) | |
serial: sh: Add DEBUG_UART support
Add support for debug output very early during boot using the DEBUG_UART
mechanism. This uses a static fixed UART port configuration selected via
Kconfig options and dedicated print functions from debug_uart.h. This is
useful e.g. when debugging problems so early during boot, that not even
the DM is initialized at that point, and thus DM_SERIAL is not available
either.
This functionality is disabled by default. To activate it, define the
following Kconfig options and select SCIF type using CFG_SCI/CFG_SCIF_A/
CFG_HSCIF/<nothing for regular SCIF>:
CONFIG_DEBUG_UART=y
CONFIG_DEBUG_UART_SCIF=y
CONFIG_DEBUG_UART_BASE=0xe6540000
CONFIG_DEBUG_UART_CLOCK=24000000
The later two options define the SCIF physical base address and SCIF
input clock in Hz. Optionally, to validate DEBUG_UART works, enable
the following as well to get early serial output message by default:
CONFIG_DEBUG_UART_ANNOUNCE=y
Signed-off-by: Marek Vasut <[email protected]>
Diffstat (limited to 'drivers/serial/Kconfig')
| -rw-r--r-- | drivers/serial/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index bb5083201b3..10d07daf277 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -415,6 +415,14 @@ config DEBUG_UART_SEMIHOSTING start up driver model. The driver will be available until the real driver model serial is running. +config DEBUG_UART_SCIF + bool "Renesas SCIF UART" + depends on SH || ARCH_RMOBILE + help + Select this to enable a debug UART using the serial_sh driver. You + will need to provide parameters to make this work. The driver will + be available until the real driver-model serial is running. + config DEBUG_UART_SIFIVE bool "SiFive UART" depends on SIFIVE_SERIAL |