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| author | Julien Viard de Galbert <jviarddegalbert@online.net> | 2018-02-20 11:45:48 +0100 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-02-21 16:09:06 +0000 |
| commit | 235daa4bf6b6467b5df675dcfe5041b7f62eeae3 (patch) | |
| tree | 074bc4b58e2da4c7f6fb43c5e7613b08861d5d33 /src/include/console/uart.h | |
| parent | fa650f5e8c7cd81138b60d09d4a41b5454f03cc1 (diff) | |
| download | coreboot-235daa4bf6b6467b5df675dcfe5041b7f62eeae3.tar.xz | |
driver/uart: Introduce a way for mainboard to override the baudrate
The rationale is to allow the mainboard to override the default
baudrate for instance by sampling GPIOs at boot.
A new configuration option is available for mainboards to select
this behaviour. It will then have to define the function
get_uart_baudrate to return the computed baudrate.
Change-Id: I970ee788bf90b9e1a8c6ccdc5eee8029d9af0ecc
Signed-off-by: Julien Viard de Galbert <jviarddegalbert@online.net>
Reviewed-on: https://review.coreboot.org/23713
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src/include/console/uart.h')
| -rw-r--r-- | src/include/console/uart.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/include/console/uart.h b/src/include/console/uart.h index 0dccd00d43..3bd390e75b 100644 --- a/src/include/console/uart.h +++ b/src/include/console/uart.h @@ -23,6 +23,17 @@ * baudrate generator. */ unsigned int uart_platform_refclk(void); +#if IS_ENABLED(CONFIG_UART_OVERRIDE_BAUDRATE) +/* Return the baudrate, define this in your platform when using the above + configuration. */ +unsigned int get_uart_baudrate(void); +#else +static inline unsigned int get_uart_baudrate(void) +{ + return CONFIG_TTYS0_BAUD; +} +#endif + /* Returns the divisor value for a given baudrate. * The formula to satisfy is: * refclk / divisor = baudrate * oversample |