u-boot/arch/arm/cpu/armv7/uniphier/reset.c
Masahiro Yamada b603c68129 ARM: UniPhier: reset on-board devices on start-up
If a support card is attached to the main board, the on-board
SMSC9118 LAN controller is available.  It must be kept in reset
state for a while on start-up.

When the board is kicked via a debbuger rather than pushing the
hardware reset button, on-board chips are not reset; in this case
the reset signals should be asserted by software.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-11-12 00:15:23 +09:00

26 lines
515 B
C

/*
* Copyright (C) 2012-2014 Panasonic Corporation
* Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/sc-regs.h>
void reset_cpu(unsigned long ignored)
{
u32 tmp;
writel(5, SC_IRQTIMSET); /* default value */
tmp = readl(SC_SLFRSTSEL);
tmp &= ~0x3; /* mask [1:0] */
tmp |= 0x0; /* XRST reboot */
writel(tmp, SC_SLFRSTSEL);
tmp = readl(SC_SLFRSTCTL);
tmp |= 0x1;
writel(tmp, SC_SLFRSTCTL);
}