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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2020 Kalray Inc.
*/
#include <common.h>
#include <reset_source.h>
#include <mfd/syscon.h>
#include <restart.h>
#include <regmap.h>
#include <init.h>
#include <asm/ftu.h>
static struct regmap *ftu_regmap;
static void __noreturn kvx_restart_soc(struct restart_handler *rst)
{
regmap_write(ftu_regmap, KVX_FTU_SW_RESET_OFFSET, 0x1);
/* Not reached */
hang();
}
static int kvx_reset_init(void)
{
int ret;
u32 rst_cause;
ftu_regmap = syscon_regmap_lookup_by_compatible("kalray,kvx-syscon");
if (IS_ERR(ftu_regmap))
return PTR_ERR(ftu_regmap);
ret = regmap_read(ftu_regmap, KVX_FTU_RESET_CAUSE_OFFSET, &rst_cause);
if (ret < 0) {
reset_source_set(RESET_UKWN);
return ret;
}
switch (rst_cause) {
case KVX_FTU_RESET_CAUSE_CODE_DSU:
reset_source_set(RESET_JTAG);
break;
case KVX_FTU_RESET_CAUSE_CODE_SW:
reset_source_set(RESET_RST);
break;
case KVX_FTU_RESET_CAUSE_CODE_MPPA:
reset_source_set(RESET_POR);
break;
case KVX_FTU_RESET_CAUSE_CODE_PCIE:
reset_source_set(RESET_EXT);
break;
case KVX_FTU_RESET_CAUSE_CODE_WDOG_0:
case KVX_FTU_RESET_CAUSE_CODE_WDOG_1:
case KVX_FTU_RESET_CAUSE_CODE_WDOG_2:
case KVX_FTU_RESET_CAUSE_CODE_WDOG_3:
case KVX_FTU_RESET_CAUSE_CODE_WDOG_4:
reset_source_set(RESET_WDG);
break;
}
restart_handler_register_fn(kvx_restart_soc);
return 0;
}
device_initcall(kvx_reset_init);
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