80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
|
|
* (C) Copyright 2012 Juergen Beisert - <kernel@pengutronix.de>
|
|
*
|
|
* 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.
|
|
*/
|
|
#define pr_fmt(fmt) "reset-source: " fmt
|
|
|
|
#include <common.h>
|
|
#include <init.h>
|
|
#include <environment.h>
|
|
#include <globalvar.h>
|
|
#include <reset_source.h>
|
|
|
|
static const char * const reset_src_names[] = {
|
|
[RESET_UKWN] = "unknown",
|
|
[RESET_POR] = "POR",
|
|
[RESET_RST] = "RST",
|
|
[RESET_WDG] = "WDG",
|
|
[RESET_WKE] = "WKE",
|
|
[RESET_JTAG] = "JTAG",
|
|
[RESET_THERM] = "THERM",
|
|
[RESET_EXT] = "EXT",
|
|
};
|
|
|
|
static enum reset_src_type reset_source;
|
|
static unsigned int reset_source_priority;
|
|
|
|
enum reset_src_type reset_source_get(void)
|
|
{
|
|
return reset_source;
|
|
}
|
|
EXPORT_SYMBOL(reset_source_get);
|
|
|
|
void reset_source_set_priority(enum reset_src_type st, unsigned int priority)
|
|
{
|
|
if (priority <= reset_source_priority)
|
|
return;
|
|
|
|
reset_source = st;
|
|
reset_source_priority = priority;
|
|
|
|
pr_debug("Setting reset source to %s with priority %d\n",
|
|
reset_src_names[reset_source], priority);
|
|
}
|
|
EXPORT_SYMBOL(reset_source_set_priority);
|
|
|
|
static int reset_source_init(void)
|
|
{
|
|
globalvar_add_simple_enum("system.reset", (unsigned int *)&reset_source,
|
|
reset_src_names, ARRAY_SIZE(reset_src_names));
|
|
|
|
return 0;
|
|
}
|
|
|
|
coredevice_initcall(reset_source_init);
|
|
|
|
/**
|
|
* of_get_reset_source_priority() - get the desired reset source priority from
|
|
* device tree
|
|
* @node: The device_node to read the property from
|
|
*
|
|
* return: The priority
|
|
*/
|
|
unsigned int of_get_reset_source_priority(struct device_node *node)
|
|
{
|
|
unsigned int priority = RESET_SOURCE_DEFAULT_PRIORITY;
|
|
|
|
of_property_read_u32(node, "reset-source-priority", &priority);
|
|
|
|
return priority;
|
|
}
|