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exynos: Enable the debug UART in SPL 

As a debugging aid, allow UART3 to be used as a debug UART in SPL. This
is a precursor to proper UART support, which requires a substantial
refactor.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-07-02 18:15:55 -06:00
parent bf6e702232
commit 7fb57396e6
2 changed files with 7 additions and 0 deletions
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5
arch/arm/cpu/armv7/exynos/lowlevel_init.c
View File

@ -25,6 +25,7 @@
#include <common.h>
#include <config.h>
#include <debug_uart.h>
#include <asm/arch/cpu.h>
#include <asm/arch/dmc.h>
#include <asm/arch/power.h>
@ -216,6 +217,10 @@ int do_lowlevel_init(void)
if (actions & DO_CLOCKS) {
system_clock_init();
#ifdef CONFIG_DEBUG_UART
exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
debug_uart_init();
#endif
mem_ctrl_init(actions & DO_MEM_RESET);
tzpc_init();
}

2
drivers/serial/serial_s5p.c
View File

@ -85,6 +85,7 @@ static void __maybe_unused s5p_serial_baud(struct s5p_uart *uart, uint uclk,
writeb(val % 16, &uart->rest.value);
}
#ifndef CONFIG_SPL_BUILD
int s5p_serial_setbrg(struct udevice *dev, int baudrate)
{
struct s5p_serial_platdata *plat = dev->platdata;
@ -200,6 +201,7 @@ U_BOOT_DRIVER(serial_s5p) = {
.ops = &s5p_serial_ops,
.flags = DM_FLAG_PRE_RELOC,
};
#endif
#ifdef CONFIG_DEBUG_UART_S5P