On 01/24/2015 02:58 PM, Rafał Miłecki wrote:
> Just like in case of other watchdog drivers, use the new kernel core
> API to provide restart support.
>
> Signed-off-by: Rafał Miłecki <[email protected]>
> ---
> V2: Include changes to include/linux/bcm47xx_wdt.h
> ---
> drivers/watchdog/bcm47xx_wdt.c | 22 ++++++++++++++++++++--
> include/linux/bcm47xx_wdt.h | 1 +
> 2 files changed, 21 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/watchdog/bcm47xx_wdt.c b/drivers/watchdog/bcm47xx_wdt.c
> index 9816485..dac3c5d 100644
> --- a/drivers/watchdog/bcm47xx_wdt.c
> +++ b/drivers/watchdog/bcm47xx_wdt.c
> @@ -169,6 +169,17 @@ static int bcm47xx_wdt_notify_sys(struct notifier_block
> *this,
> return NOTIFY_DONE;
> }
>
> +static int bcm47xx_wdt_restart(struct notifier_block *this, unsigned long
> mode,
> + void *cmd)
> +{
> + struct bcm47xx_wdt *wdt;
> +
> + wdt = container_of(this, struct bcm47xx_wdt, restart_handler);
> + wdt->timer_set(wdt, 1);
I assume you want to replace the restart code used in
arch/mips/bcm47xx/setup.c and use this for restart on the arm SoCs.
On BCM4705 some mips asm is needed to make the restart operation
reliable, where do you plan to put it?
> +
> + return NOTIFY_DONE;
> +}
> +
> static struct watchdog_ops bcm47xx_wdt_soft_ops = {
> .owner = THIS_MODULE,
> .start = bcm47xx_wdt_soft_start,
> @@ -204,20 +215,27 @@ static int bcm47xx_wdt_probe(struct platform_device
> *pdev)
> watchdog_set_nowayout(&wdt->wdd, nowayout);
>
> wdt->notifier.notifier_call = &bcm47xx_wdt_notify_sys;
> -
> ret = register_reboot_notifier(&wdt->notifier);
> if (ret)
> goto err_timer;
>
> - ret = watchdog_register_device(&wdt->wdd);
> + wdt->restart_handler.notifier_call = &bcm47xx_wdt_restart;
> + wdt->restart_handler.priority = 128;
> + ret = register_restart_handler(&wdt->restart_handler);
> if (ret)
> goto err_notifier;
>
> + ret = watchdog_register_device(&wdt->wdd);
> + if (ret)
> + goto err_handler;
> +
> dev_info(&pdev->dev, "BCM47xx Watchdog Timer enabled (%d
> seconds%s%s)\n",
> timeout, nowayout ? ", nowayout" : "",
> soft ? ", Software Timer" : "");
> return 0;
>
> +err_handler:
> + unregister_restart_handler(&wdt->restart_handler);
> err_notifier:
> unregister_reboot_notifier(&wdt->notifier);
> err_timer:
> diff --git a/include/linux/bcm47xx_wdt.h b/include/linux/bcm47xx_wdt.h
> index b708786..5582c21 100644
> --- a/include/linux/bcm47xx_wdt.h
> +++ b/include/linux/bcm47xx_wdt.h
> @@ -16,6 +16,7 @@ struct bcm47xx_wdt {
>
> struct watchdog_device wdd;
> struct notifier_block notifier;
> + struct notifier_block restart_handler;
>
> struct timer_list soft_timer;
> atomic_t soft_ticks;
>
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