On 24.10.24 15:08, Julian Vetter wrote:
> From: Jules Maselbas <jmaselbas@xxxxxxxxx>
>
> 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 <jvetter@xxxxxxxxxxxxx>
Reviewed-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
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
--
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