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authorJulien Viard de Galbert <jviarddegalbert@online.net>2018-02-20 11:45:48 +0100
committerMartin Roth <martinroth@google.com>2018-02-21 16:09:06 +0000
commit235daa4bf6b6467b5df675dcfe5041b7f62eeae3 (patch)
tree074bc4b58e2da4c7f6fb43c5e7613b08861d5d33 /src/soc/mediatek
parentfa650f5e8c7cd81138b60d09d4a41b5454f03cc1 (diff)
downloadcoreboot-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/soc/mediatek')
-rw-r--r--src/soc/mediatek/mt8173/uart.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/soc/mediatek/mt8173/uart.c b/src/soc/mediatek/mt8173/uart.c
index 36a279fa65..93625c4bfb 100644
--- a/src/soc/mediatek/mt8173/uart.c
+++ b/src/soc/mediatek/mt8173/uart.c
@@ -87,7 +87,7 @@ static void mtk_uart_init(void)
{
/* Use a hardcoded divisor for now. */
const unsigned uartclk = 26 * MHz;
- const unsigned baudrate = CONFIG_TTYS0_BAUD;
+ const unsigned baudrate = get_uart_baudrate();
const uint8_t line_config = UART8250_LCR_WLS_8; /* 8n1 */
unsigned highspeed, quot, divisor, remainder;
@@ -177,7 +177,7 @@ void uart_fill_lb(void *data)
struct lb_serial serial;
serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
serial.baseaddr = UART0_BASE;
- serial.baud = CONFIG_TTYS0_BAUD;
+ serial.baud = get_uart_baudrate();
serial.regwidth = 4;
lb_add_serial(&serial, data);