diff options
Diffstat (limited to 'kernel/arch/arm/mach-bcm/board_bcm281xx.c')
| -rw-r--r-- | kernel/arch/arm/mach-bcm/board_bcm281xx.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-bcm/board_bcm281xx.c b/kernel/arch/arm/mach-bcm/board_bcm281xx.c new file mode 100644 index 000000000..2e367bd7c --- /dev/null +++ b/kernel/arch/arm/mach-bcm/board_bcm281xx.c @@ -0,0 +1,74 @@ +/* + * 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, NULL); + 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 |