linux-kernel - Re: [PATCH v2] watchdog: pnx4008: readout watchdog state

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Date:   Mon, 15 Apr 2019 09:58:26 +0200
From:   gregory.clement@...tlin.com
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Sylvain Lemieux <slemieux.tyco@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] watchdog: pnx4008: readout watchdog state

On 2019-04-11 21:14, Alexandre Belloni wrote:
> Readout the enabled state so it is possible to get the pre-userspace
> handler working. Also, avoid disabling the watchdog to ensure it 
> continues
> working and triggers if there is an issue later in the boot or if 
> userspace
> fails to start.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

Tested-by: Gregory CLEMENT <gregory.clement@...tlin.com>


> ---
>  drivers/watchdog/pnx4008_wdt.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/pnx4008_wdt.c 
> b/drivers/watchdog/pnx4008_wdt.c
> index 8e261799c84e..4ce0389d1442 100644
> --- a/drivers/watchdog/pnx4008_wdt.c
> +++ b/drivers/watchdog/pnx4008_wdt.c
> @@ -209,7 +209,8 @@ static int pnx4008_wdt_probe(struct platform_device 
> *pdev)
>  	watchdog_set_nowayout(&pnx4008_wdd, nowayout);
>  	watchdog_set_restart_priority(&pnx4008_wdd, 128);
> 
> -	pnx4008_wdt_stop(&pnx4008_wdd);	/* disable for now */
> +	if (readl(WDTIM_CTRL(wdt_base)) & COUNT_ENAB)
> +		set_bit(WDOG_HW_RUNNING, &pnx4008_wdd.status);
> 
>  	ret = watchdog_register_device(&pnx4008_wdd);
>  	if (ret < 0) {