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