diff options
| author | Paolo Pisati <p.pisati@gmail.com> | 2017-02-10 17:28:05 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-05-09 20:30:08 -0400 |
| commit | 45a6d231b2f9b891a7df517fc40b8466e12f2b57 (patch) | |
| tree | 1297bde1b56a80d0d9e9eeda13db1a6bcac5f475 /drivers/watchdog | |
| parent | 3e16705d3e253e54d62c793fc92904840c282576 (diff) | |
bcm2835_wdt: support for the BCM2835/2836 watchdog
Signed-off-by: Paolo Pisati <p.pisati@gmail.com>
Diffstat (limited to 'drivers/watchdog')
| -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 2034e3c620..bdaf5d4101 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 dfc7fbda4a..8378601b33 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 0000000000..6f753ae8ae --- /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; +} |