2012-07-18 08:46:47 +00:00
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/*
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* (C) Copyright 2012 Juergen Beisert - <kernel@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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2015-08-26 10:01:51 +00:00
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#define pr_fmt(fmt) "reset-source: " fmt
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2012-07-18 08:46:47 +00:00
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#include <common.h>
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#include <init.h>
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#include <environment.h>
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#include <globalvar.h>
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#include <reset_source.h>
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static const char * const reset_src_names[] = {
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[RESET_UKWN] = "unknown",
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[RESET_POR] = "POR",
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[RESET_RST] = "RST",
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[RESET_WDG] = "WDG",
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[RESET_WKE] = "WKE",
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[RESET_JTAG] = "JTAG",
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2014-10-20 18:15:29 +00:00
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[RESET_THERM] = "THERM",
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2015-02-12 09:30:54 +00:00
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[RESET_EXT] = "EXT",
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2012-07-18 08:46:47 +00:00
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};
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2014-01-24 14:17:32 +00:00
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static enum reset_src_type reset_source;
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2015-08-26 08:13:22 +00:00
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static unsigned int reset_source_priority;
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2014-01-24 14:17:32 +00:00
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enum reset_src_type reset_source_get(void)
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{
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return reset_source;
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}
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EXPORT_SYMBOL(reset_source_get);
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2015-08-26 08:13:22 +00:00
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void reset_source_set_priority(enum reset_src_type st, unsigned int priority)
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2012-07-18 08:46:47 +00:00
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{
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2015-08-26 08:13:22 +00:00
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if (priority <= reset_source_priority)
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return;
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2014-01-24 14:17:32 +00:00
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reset_source = st;
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2015-08-26 08:13:22 +00:00
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reset_source_priority = priority;
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2015-08-26 10:01:51 +00:00
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pr_debug("Setting reset source to %s with priority %d\n",
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reset_src_names[reset_source], priority);
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2012-07-18 08:46:47 +00:00
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}
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2014-01-24 14:16:32 +00:00
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EXPORT_SYMBOL(reset_source_set);
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2012-07-18 08:46:47 +00:00
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2014-01-24 14:16:32 +00:00
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static int reset_source_init(void)
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2012-07-18 08:46:47 +00:00
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{
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2015-08-26 10:01:04 +00:00
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globalvar_add_simple_enum("system.reset", (unsigned int *)&reset_source,
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reset_src_names, ARRAY_SIZE(reset_src_names));
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2013-08-14 19:16:21 +00:00
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2012-07-18 08:46:47 +00:00
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return 0;
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}
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2014-01-24 14:16:32 +00:00
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coredevice_initcall(reset_source_init);
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2015-08-26 08:13:22 +00:00
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/**
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* of_get_reset_source_priority() - get the desired reset source priority from
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* device tree
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* @node: The device_node to read the property from
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*
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* return: The priority
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*/
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unsigned int of_get_reset_source_priority(struct device_node *node)
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{
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unsigned int priority = RESET_SOURCE_DEFAULT_PRIORITY;
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of_property_read_u32(node, "reset-source-priority", &priority);
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return priority;
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}
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