mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 15:23:07 +00:00
d5cf32977f
For ARM32 architecture, CONFIG_DEBUG_LL is available for early low-level debugging (and actually UniPhier 32bit SoCs use it), but ARM64 architecture does not support it. Instead, CONFIG_DEBUG_UART is available as an architecture-independent debug facility. This commit supports it on all the UniPhier SoCs (including the new ARMv8 SoCs), which is very useful for new SoC bringups. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
21 lines
450 B
C
21 lines
450 B
C
/*
|
|
* Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#include "../sg-regs.h"
|
|
#include "debug-uart.h"
|
|
|
|
#define UNIPHIER_LD4_UART_CLK 36864000
|
|
|
|
unsigned int uniphier_ld4_debug_uart_init(void)
|
|
{
|
|
sg_set_iectrl(0);
|
|
sg_set_pinsel(88, 1, 8, 4); /* HSDOUT6 -> TXD0 */
|
|
|
|
return DIV_ROUND_CLOSEST(UNIPHIER_LD4_UART_CLK, 16 * CONFIG_BAUDRATE);
|
|
}
|