diff options
| author | Stefan Roese <sr@denx.de> | 2017-08-16 18:37:16 +0300 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2017-08-24 06:00:47 +0300 |
| commit | 3ca7a06afb7cbc867b7861a8b9aada74e5bbb559 (patch) | |
| tree | 725eb62e426a11719fdfaaaa080fe462ddeaea5e /drivers/serial/Kconfig | |
| parent | 7fded0ce0ff68551ceb631f98d60db162e49f80c (diff) | |
| download | u-boot-3ca7a06afb7cbc867b7861a8b9aada74e5bbb559.tar.xz | |
serial: serial-uclass: Add generic serial RX 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 buffer support
for all DM based serial drivers. 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>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/serial/Kconfig')
| -rw-r--r-- | drivers/serial/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 1c2c5d66e1..aeed538fa4 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -64,6 +64,21 @@ config DM_SERIAL implements serial_putc() etc. The uclass interface is defined in include/serial.h. +config SERIAL_RX_BUFFER + bool "Enable RX buffer for serial input" + depends on DM_SERIAL + help + Enable RX 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 SERIAL_RX_BUFFER_SIZE + int "RX buffer size" + depends on SERIAL_RX_BUFFER + default 256 + help + The size of the RX buffer (needs to be power of 2) + config SPL_DM_SERIAL bool "Enable Driver Model for serial drivers in SPL" depends on DM_SERIAL |