lib/coreboot_table: Simplify API to set up lb_serial

Instead of having callbacks into serial console code to set up the
coreboot table have the coreboot table code call IP specific code to get
serial information. This makes it easier to reuse the information as the
return value can be used in a different context (e.g. when filling in a
FDT).

This also removes boilerplate code to set up lb_console entries by
setting entry based on the type in struct lb_uart.

Change-Id: I6c08a88fb5fc035eb28d0becf19471c709c8043d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68768
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>

1 files changed, 8 insertions, 10 deletions

diff --git a/src/soc/mediatek/common/uart.c b/src/soc/mediatek/common/uart.c
index 11c3452ce2..79ca07230f 100644
--- a/src/soc/mediatek/common/uart.c
+++ b/src/soc/mediatek/common/uart.c
@@ -159,15 +159,13 @@ void uart_tx_flush(unsigned int idx)
 	mtk_uart_tx_flush();
 }
 
-void uart_fill_lb(void *data)
+enum cb_err fill_lb_serial(struct lb_serial *serial)
 {
-	struct lb_serial serial;
-	serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
-	serial.baseaddr = UART0_BASE;
-	serial.baud = get_uart_baudrate();
-	serial.regwidth = 4;
-	serial.input_hertz = UART_HZ;
-	lb_add_serial(&serial, data);
-
-	lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);
+	serial->type = LB_SERIAL_TYPE_MEMORY_MAPPED;
+	serial->baseaddr = UART0_BASE;
+	serial->baud = get_uart_baudrate();
+	serial->regwidth = 4;
+	serial->input_hertz = UART_HZ;
+
+	return CB_SUCCESS;
 }