u-boot/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c
Stefan Roese f2a751beba x86: conga-qeval20-qa3: Add support for internal UART
This patch adds support to enable and use the internal BayTrail UART
instead of the one integrated in the Super IO Winbond chip. For this,
a 2nd defconfig file is added.

This is useful for tests done for the congatec SoM used on baseboards
without such a Super IO chip.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-12 13:46:01 +08:00

33 lines
660 B
C

/*
* Copyright (C) 2016 Stefan Roese <sr@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <winbond_w83627.h>
#include <asm/gpio.h>
#include <asm/ibmpc.h>
#include <asm/pnp_def.h>
int board_early_init_f(void)
{
#ifndef CONFIG_INTERNAL_UART
/*
* The FSP enables the BayTrail internal legacy UART (again).
* Disable it again, so that the Winbond one can be used.
*/
setup_internal_uart(0);
/* Enable the legacy UART in the Winbond W83627 Super IO chip */
winbond_enable_serial(PNP_DEV(WINBOND_IO_PORT, W83627DHG_SP1),
UART0_BASE, UART0_IRQ);
#endif
return 0;
}
int arch_early_init_r(void)
{
return 0;
}