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/*
* Copyright (C) 2012-2014 Broadcom Corporation
*
* 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 version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/clocksource.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <asm/mach/arch.h>
#include "kona_l2_cache.h"
#define SECWDOG_OFFSET 0x00000000
#define SECWDOG_RESERVED_MASK 0xe2000000
#define SECWDOG_WD_LOAD_FLAG_MASK 0x10000000
#define SECWDOG_EN_MASK 0x08000000
#define SECWDOG_SRSTEN_MASK 0x04000000
#define SECWDOG_CLKS_SHIFT 20
#define SECWDOG_COUNT_SHIFT 0
static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
{
uint32_t val;
void __iomem *base;
struct device_node *np_wdog;
np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
if (!np_wdog) {
pr_emerg("Couldn't find brcm,kona-wdt\n");
return;
}
base = of_iomap(np_wdog, 0);
if (!base) {
pr_emerg("Couldn't map brcm,kona-wdt\n");
return;
}
/* Enable watchdog with short timeout (244us). */
val = readl(base + SECWDOG_OFFSET);
val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
(0x15 << SECWDOG_CLKS_SHIFT) |
(0x8 << SECWDOG_COUNT_SHIFT);
writel(val, base + SECWDOG_OFFSET);
/* Wait for reset */
while (1);
}
static void __init bcm281xx_init(void)
{
of_platform_populate(NULL, of_default_bus_match_table, NULL,
&platform_bus);
kona_l2_cache_init();
}
static const char * const bcm281xx_dt_compat[] = {
"brcm,bcm11351", /* Have to use the first number upstreamed */
NULL,
};
DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor")
.init_machine = bcm281xx_init,
.restart = bcm281xx_restart,
.dt_compat = bcm281xx_dt_compat,
MACHINE_END
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