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author | Olof Johansson | 2013-08-29 19:44:42 +0200 |
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committer | Olof Johansson | 2013-08-29 19:44:42 +0200 |
commit | 293d0e3bf0818f3f7307a56d3ac31f41b5078aa1 (patch) | |
tree | aab2e5026c66d52581c39b5c21aca6e3fd8d0357 /arch/arm/mach-bcm/kona.c | |
parent | Merge tag 'tegra-for-3.12-defconfig' of git://git.kernel.org/pub/scm/linux/ke... (diff) | |
parent | ARM: bcm: Make secure API call optional (diff) | |
download | kernel-qcow2-linux-293d0e3bf0818f3f7307a56d3ac31f41b5078aa1.tar.gz kernel-qcow2-linux-293d0e3bf0818f3f7307a56d3ac31f41b5078aa1.tar.xz kernel-qcow2-linux-293d0e3bf0818f3f7307a56d3ac31f41b5078aa1.zip |
Merge branch 'armsoc/for-3.12/soc' of git://github.com/broadcom/bcm11351 into next/boards
From Christian Daudt, SoC changes for Broadcom.
* 'armsoc/for-3.12/soc' of git://github.com/broadcom/bcm11351: (673 commits)
ARM: bcm: Make secure API call optional
ARM: DT: binding fixup to align with vendor-prefixes.txt (drivers)
ARM: mmc: fix NONREMOVABLE test in sdhci-bcm-kona
ARM: bcm: Rename board_bcm
mmc: sdhci-bcm-kona: make linker-section warning go away
ARM: configs: disable DEBUG_LL in bcm_defconfig
ARM: bcm281xx: Board specific reboot code
ARM bcm281xx: Turn on socket & network support.
ARM: bcm281xx: Turn on L2 cache.
+ Linux 3.11-rc4
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/mach-bcm/kona.c')
-rw-r--r-- | arch/arm/mach-bcm/kona.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/arm/mach-bcm/kona.c b/arch/arm/mach-bcm/kona.c new file mode 100644 index 000000000000..6939d9017f63 --- /dev/null +++ b/arch/arm/mach-bcm/kona.c @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2013 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/of_address.h> +#include <asm/io.h> + +#include "kona.h" + +static void __iomem *watchdog_base; + +void bcm_kona_setup_restart(void) +{ + struct device_node *np_wdog; + + /* + * The assumption is that whoever calls bcm_kona_setup_restart() + * also needs a Kona Watchdog Timer entry in Device Tree, i.e. we + * report an error if the DT entry is missing. + */ + np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt"); + if (!np_wdog) { + pr_err("brcm,kona-wdt not found in DT, reboot disabled\n"); + return; + } + watchdog_base = of_iomap(np_wdog, 0); + WARN(!watchdog_base, "failed to map watchdog base"); + of_node_put(np_wdog); +} + +#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_LOCK_SHIFT 0 + +void bcm_kona_restart(enum reboot_mode mode, const char *cmd) +{ + uint32_t val; + + if (!watchdog_base) + panic("Watchdog not mapped. Reboot failed.\n"); + + /* Enable watchdog2 with very short timeout. */ + val = readl(watchdog_base + SECWDOG_OFFSET); + val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK; + val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK | + (0x8 << SECWDOG_CLKS_SHIFT) | + (0x8 << SECWDOG_LOCK_SHIFT); + writel(val, watchdog_base + SECWDOG_OFFSET); + + while (1) + ; +} |