diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/watchdog/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/watchdog/Makefile | 1 | ||||
| -rw-r--r-- | drivers/watchdog/bcm2835_wdt.c | 35 |
3 files changed, 48 insertions, 0 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 2034e3c620f..bdaf5d4101d 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -1,5 +1,17 @@ menu "Watchdog Timer Support" +config HW_WATCHDOG + bool + +config BCM2835_WDT + bool "Enable BCM2835/2836 watchdog driver" + select HW_WATCHDOG + help + Say Y here to enable the BCM2835/2836 watchdog + + This provides basic infrastructure to support BCM2835/2836 watchdog + hardware, with a max timeout of ~15secs. + config ULP_WATCHDOG bool "i.MX7ULP watchdog" help diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index dfc7fbda4ab..8378601b331 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -18,3 +18,4 @@ obj-$(CONFIG_ULP_WATCHDOG) += ulp_wdog.o obj-$(CONFIG_WDT) += wdt-uclass.o obj-$(CONFIG_WDT_SANDBOX) += sandbox_wdt.o obj-$(CONFIG_WDT_ASPEED) += ast_wdt.o +obj-$(CONFIG_BCM2835_WDT) += bcm2835_wdt.o diff --git a/drivers/watchdog/bcm2835_wdt.c b/drivers/watchdog/bcm2835_wdt.c new file mode 100644 index 00000000000..6f753ae8ae4 --- /dev/null +++ b/drivers/watchdog/bcm2835_wdt.c @@ -0,0 +1,35 @@ +/* + * Watchdog driver for Broadcom BCM2835 + * + * Copyright (C) 2017 Paolo Pisati <p.pisati@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <efi_loader.h> +#include <asm/io.h> +#include <asm/arch/wdog.h> + +#define SECS_TO_WDOG_TICKS(x) ((x) << 16) +#define MAX_TIMEOUT 0xf /* ~15s */ + +static __efi_runtime_data bool enabled = true; + +extern void reset_cpu(ulong ticks); + +void hw_watchdog_reset(void) +{ + if (enabled) + reset_cpu(SECS_TO_WDOG_TICKS(MAX_TIMEOUT)); +} + +void hw_watchdog_init(void) +{ + hw_watchdog_reset(); +} + +void __efi_runtime hw_watchdog_disable(void) +{ + enabled = false; +} |