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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* (C) Copyright 2012 Juergen Beisert - <kernel@pengutronix.de>
*/
#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",
[RESET_BROWNOUT] = "BROWNOUT",
};
static enum reset_src_type reset_source;
static unsigned int reset_source_priority;
static int reset_source_instance;
static struct device *reset_source_device;
enum reset_src_type reset_source_get(void)
{
return reset_source;
}
EXPORT_SYMBOL(reset_source_get);
const char *reset_source_to_string(enum reset_src_type st)
{
return reset_src_names[st];
}
EXPORT_SYMBOL(reset_source_to_string);
int reset_source_get_instance(void)
{
return reset_source_instance;
}
EXPORT_SYMBOL(reset_source_get_instance);
struct device *reset_source_get_device(void)
{
return reset_source_device;
}
EXPORT_SYMBOL(reset_source_get_device);
static void __reset_source_set(struct device *dev,
enum reset_src_type st,
unsigned int priority, int instance)
{
if (priority <= reset_source_priority)
return;
reset_source = st;
reset_source_priority = priority;
reset_source_instance = instance;
reset_source_device = NULL;
pr_debug("Setting reset source to %s with priority %d\n",
reset_src_names[reset_source], priority);
}
void reset_source_set_prinst(enum reset_src_type st,
unsigned int priority, int instance)
{
__reset_source_set(NULL, st, priority, instance);
}
EXPORT_SYMBOL(reset_source_set_prinst);
void reset_source_set_device(struct device *dev, enum reset_src_type st)
{
unsigned int priority = RESET_SOURCE_DEFAULT_PRIORITY;
of_property_read_u32(dev->of_node, "reset-source-priority", &priority);
__reset_source_set(dev, st, priority, -1);
}
EXPORT_SYMBOL(reset_source_set_device);
static int reset_source_init(void)
{
globalvar_add_simple_enum("system.reset", (unsigned int *)&reset_source,
reset_src_names, ARRAY_SIZE(reset_src_names));
globalvar_add_simple_int("system.reset_instance", &reset_source_instance,
"%d");
return 0;
}
coredevice_initcall(reset_source_init);
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