On 24.10.24 15:08, Julian Vetter wrote: > 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]>
Reviewed-by: Ahmad Fatoum <[email protected]> Cheers, Ahmad > --- > drivers/watchdog/Kconfig | 11 +++++++++++ > drivers/watchdog/kvx_wdt.c | 16 ++++++++++++++++ > 2 files changed, 27 insertions(+) > > diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig > index 762e37c9c2..71bc7bf0ac 100644 > --- a/drivers/watchdog/Kconfig > +++ b/drivers/watchdog/Kconfig > @@ -89,6 +89,17 @@ config WATCHDOG_KVX > help > Add support for the KVX core watchdog. > > +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 > + > 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 -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
