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/*
* arch/arm/mach-omap2/resetreason.c
*
* Copyright (C) 2011 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include "prm-regbits-44xx.h"
#include "prcm44xx.h"
#include "prm44xx.h"
#include "prminst44xx.h"
#include "resetreason.h"
static char resetreason[1024];
static struct {
const char *str;
u32 mask;
} resetreason_flags[] = {
{ "C2C ", OMAP4430_C2C_RST_MASK },
{ "IcePick ", OMAP4430_ICEPICK_RST_MASK },
{ "Voltage Manager ", OMAP4430_VDD_MPU_VOLT_MGR_RST_MASK |
OMAP4430_VDD_IVA_VOLT_MGR_RST_MASK |
OMAP4430_VDD_CORE_VOLT_MGR_RST_MASK },
{ "external warm ", OMAP4430_EXTERNAL_WARM_RST_MASK },
{ "MPU Watchdog Timer ", OMAP4430_MPU_WDT_RST_MASK },
{ "warm software ", OMAP4430_GLOBAL_WARM_SW_RST_MASK },
{ "cold ", OMAP4430_GLOBAL_COLD_RST_MASK },
};
const char *omap4_get_resetreason(void)
{
return resetreason;
}
static int __init resetreason_init(void)
{
int i;
u32 reasons =
omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_RSTST_OFFSET);
char buf[128];
strlcpy(resetreason, "Last reset was ", sizeof(resetreason));
for (i = 0; i < ARRAY_SIZE(resetreason_flags); i++)
if (reasons & resetreason_flags[i].mask)
strlcat(resetreason, resetreason_flags[i].str,
sizeof(resetreason));
snprintf(buf, sizeof(buf), "reset (PRM_RSTST=0x%x)\n", reasons);
strlcat(resetreason, buf, sizeof(resetreason));
pr_info("%s\n", resetreason);
omap4_prminst_write_inst_reg(reasons, OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST, OMAP4_PRM_RSTST_OFFSET);
return 0;
}
postcore_initcall(resetreason_init);
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