From: Jules Maselbas <[email protected]> Add support for a watchdog that starts as early as possible in barebox. So, if there is an issue the board is reset properly.
Signed-off-by: Julian Vetter <[email protected]> --- drivers/watchdog/Kconfig | 13 +++++++++++++ drivers/watchdog/kvx_wdt.c | 16 ++++++++++++++++ 2 files changed, 29 insertions(+) diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 762e37c9c2..b1924b5b05 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -89,6 +89,19 @@ config WATCHDOG_KVX help Add support for the KVX core watchdog. +if WATCHDOG_KVX +config WATCHDOG_KVX_EARLY_INIT + bool "KVX Core watchdog early init" + depends on WATCHDOG_KVX + help + Activate the watchdog with early initcall + +config WATCHDOG_KVX_EARLY_TIMEOUT + int "KVX Core watchdog early timeout in cycles" + depends on WATCHDOG_KVX_EARLY_INIT + default 100000000 +endif + config WATCHDOG_BCM2835 bool "Watchdog for BCM283x SoCs" depends on ARCH_BCM283X || COMPILE_TEST diff --git a/drivers/watchdog/kvx_wdt.c b/drivers/watchdog/kvx_wdt.c index be6b08b71c..3e66aa38ba 100644 --- a/drivers/watchdog/kvx_wdt.c +++ b/drivers/watchdog/kvx_wdt.c @@ -91,3 +91,19 @@ static struct driver kvx_wdt_driver = { .of_compatible = DRV_OF_COMPAT(kvx_wdt_of_match), }; device_platform_driver(kvx_wdt_driver); + +#ifdef CONFIG_WATCHDOG_KVX_EARLY_INIT +static int kvx_wdt_early_init(void) +{ + /* Set Start watchdog counting */ + kvx_sfr_set(WDV, CONFIG_WATCHDOG_KVX_EARLY_TIMEOUT); + kvx_sfr_set(WDR, 0); + + /* Start watchdog counting */ + kvx_sfr_set_field(TCR, WUI, 1); + kvx_sfr_set_field(TCR, WCE, 1); + + return 0; +} +core_initcall(kvx_wdt_early_init); +#endif -- 2.34.1
