Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / mach-bcm / board_bcm281xx.c

diff --git a/kernel/arch/arm/mach-bcm/board_bcm281xx.c b/kernel/arch/arm/mach-bcm/board_bcm281xx.c
new file mode 100644 (file)
index 0000000..2e367bd
--- /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