diff options
| author | Stefan Roese <sr@denx.de> | 2017-07-14 17:25:54 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-07-23 17:04:46 -0400 |
| commit | 6822cf3ec7c8768b8727573b8f4b2cb3d870b881 (patch) | |
| tree | 5069bd6cc7729d3cced2bc523429c9e3573443bd /drivers/serial/Kconfig | |
| parent | c3bec5478f604c88191bd29309abe47df0be53cb (diff) | |
serial: ns16550: Add RX interrupt buffer support
Pasting longer lines into the U-Boot console prompt sometimes leads to
characters missing. One problem here is the small 16-byte FIFO of the
legacy NS16550 UART, e.g. on x86 platforms.
This patch now introduces a Kconfig option to enable RX interrupt
buffer support for NS16550 style UARTs. With this option enabled, I was
able paste really long lines into the U-Boot console, without any
characters missing.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
[trini: Guard ns16550_serial_remove with
CONFIG_IS_ENABLED(SERIAL_PRESENT) to match struct assignment]
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'drivers/serial/Kconfig')
| -rw-r--r-- | drivers/serial/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 97cef7edbd..0748a92545 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -64,6 +64,16 @@ config DM_SERIAL implements serial_putc() etc. The uclass interface is defined in include/serial.h. +config SERIAL_IRQ_BUFFER + bool "Enable RX interrupt buffer for serial input" + depends on DM_SERIAL + default n + help + Enable RX interrupt buffer support for the serial driver. + This enables pasting longer strings, even when the RX FIFO + of the UART is not big enough (e.g. 16 bytes on the normal + NS16550). + config SPL_DM_SERIAL bool "Enable Driver Model for serial drivers in SPL" depends on DM_SERIAL |