Enable CONFIG_SERIAL_RX_BUFFER on all Renesas R-Car devices which
use the SCIF serial port. This allows receiving large strings at
bulk even if the RX FIFO is small and would otherwise overflow.
The usual trigger for the problem addressed here is a paste of a
very long command into U-Boot command line, somewhere between 400
and 500 characters long. The trailing end of the string is usually
not received and the command line input stops responding due to RX
overflow errors. The CONFIG_SERIAL_RX_BUFFER allows efficient read
of data from the RX FIFO, which prevents the overflow, and allows
safe reception of long pasted strings.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Move CONFIG_ENV_OVERWRITE=y into commont renesas_rcar.config to make sure
this configuration option is consistently enabled on all of Renesas R-Car
Gen2, Gen3, Gen4. Currently this option is not enabled on Gen4, this fix
corrects that omission.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Deduplicate common Renesas defconfig by factoring out the common
parts into generic renesas_rcar_defconfig and including those using
the #include <configs/...> preprocessor macro in the current set of
board specific defconfigs. The preprocessor macro is applicable
to defconfigs as well.
This introduces no functional change, the resulting .config are
identical for all Renesas systems.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
