diff options
| -rw-r--r-- | target/linux/ath79/patches-4.14/921-serial-core-add-support-for-boot-console-with-arbitr.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/target/linux/ath79/patches-4.14/921-serial-core-add-support-for-boot-console-with-arbitr.patch b/target/linux/ath79/patches-4.14/921-serial-core-add-support-for-boot-console-with-arbitr.patch new file mode 100644 index 0000000000..23b6d73959 --- /dev/null +++ b/target/linux/ath79/patches-4.14/921-serial-core-add-support-for-boot-console-with-arbitr.patch @@ -0,0 +1,54 @@ +From 4d3c17975c7814884a721fe693b3adf5c426d759 Mon Sep 17 00:00:00 2001 +From: Hauke Mehrtens <hauke@hauke-m.de> +Date: Tue, 10 Nov 2015 22:18:39 +0100 +Subject: [RFC] serial: core: add support for boot console with arbitrary + baud rates + +The Arduino Yun uses a baud rate of 250000 by default. The serial is +going over the Atmel ATmega and is used to connect to this chip. +Without this patch Linux wants to switch the console to 9600 Baud. + +With this patch Linux will use the configured baud rate and not a +default one specified in uart_register_driver(). + +Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> +[rebased to 4.14, slightly reworded commit message] +Signed-off-by: Sungbo Eo <mans0n@gorani.run> +--- + drivers/tty/serial/serial_core.c | 6 +++++- + include/linux/console.h | 1 + + 2 files changed, 6 insertions(+), 1 deletions(-) + +--- a/drivers/tty/serial/serial_core.c ++++ b/drivers/tty/serial/serial_core.c +@@ -232,6 +232,8 @@ static int uart_port_startup(struct tty_ + if (retval == 0) { + if (uart_console(uport) && uport->cons->cflag) { + tty->termios.c_cflag = uport->cons->cflag; ++ tty->termios.c_ospeed = uport->cons->baud; ++ tty->termios.c_ispeed = uport->cons->baud; + uport->cons->cflag = 0; + } + /* +@@ -2072,8 +2074,10 @@ uart_set_options(struct uart_port *port, + * Allow the setting of the UART parameters with a NULL console + * too: + */ +- if (co) ++ if (co) { + co->cflag = termios.c_cflag; ++ co->baud = baud; ++ } + + return 0; + } +--- a/include/linux/console.h ++++ b/include/linux/console.h +@@ -145,6 +145,7 @@ struct console { + short flags; + short index; + int cflag; ++ int baud; + void *data; + struct console *next; + }; |