mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 07:57:21 +00:00
567802bbd6
Setting ps_hold ought to be one of the first things we do when we first boot up. If we wait until the main u-boot runs we won't set it in time and the PMIC may power us back off. Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
|
|
* Lowlevel setup for EXYNOS5 based board
|
|
*
|
|
* Copyright (C) 2013 Samsung Electronics
|
|
* Rajeshwari Shinde <rajeshwari.s@samsung.com>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <asm/arch/cpu.h>
|
|
#include <asm/arch/dmc.h>
|
|
#include <asm/arch/power.h>
|
|
#include <asm/arch/tzpc.h>
|
|
#include <asm/arch/periph.h>
|
|
#include <asm/arch/pinmux.h>
|
|
#include "common_setup.h"
|
|
|
|
/* These are the things we can do during low-level init */
|
|
enum {
|
|
DO_WAKEUP = 1 << 0,
|
|
DO_CLOCKS = 1 << 1,
|
|
DO_MEM_RESET = 1 << 2,
|
|
DO_UART = 1 << 3,
|
|
DO_POWER = 1 << 4,
|
|
};
|
|
|
|
int do_lowlevel_init(void)
|
|
{
|
|
uint32_t reset_status;
|
|
int actions = 0;
|
|
|
|
arch_cpu_init();
|
|
|
|
set_ps_hold_ctrl();
|
|
|
|
reset_status = get_reset_status();
|
|
|
|
switch (reset_status) {
|
|
case S5P_CHECK_SLEEP:
|
|
actions = DO_CLOCKS | DO_WAKEUP;
|
|
break;
|
|
case S5P_CHECK_DIDLE:
|
|
case S5P_CHECK_LPA:
|
|
actions = DO_WAKEUP;
|
|
break;
|
|
default:
|
|
/* This is a normal boot (not a wake from sleep) */
|
|
actions = DO_CLOCKS | DO_MEM_RESET | DO_POWER;
|
|
}
|
|
|
|
if (actions & DO_POWER)
|
|
set_ps_hold_ctrl();
|
|
|
|
if (actions & DO_CLOCKS) {
|
|
system_clock_init();
|
|
mem_ctrl_init(actions & DO_MEM_RESET);
|
|
tzpc_init();
|
|
}
|
|
|
|
return actions & DO_WAKEUP;
|
|
}
|