Re: [PATCH] watchdog: meson_gxbb_wdt: improve

From: Neil Armstrong
Date: Tue Jun 22 2021 - 07:08:58 EST


Hi Art,

On 22/06/2021 11:56, Artem Lapkin wrote:
> Improve meson_gxbb_wdt watchdog driver
> 1) added module param timeout and nowayout same as other modules
> 2) print watchdog driver start status
> 3) add watchdog_stop_on_unregister
> 4) remove watchdog_stop_on_reboot ( still can be activated by
> watchdog.stop_on_reboot=1 ) i think this driver configuration more useful
> becouse we can get reboot waranty for abnormal situations on shutdown stage

Can you split the patch in 4 distinct changes ?

Neil

>
> Signed-off-by: Artem Lapkin <art@xxxxxxxxxx>
> ---
> drivers/watchdog/meson_gxbb_wdt.c | 20 ++++++++++++++++++--
> 1 file changed, 18 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/watchdog/meson_gxbb_wdt.c b/drivers/watchdog/meson_gxbb_wdt.c
> index 5a9ca10fbcfa..15c889932c13 100644
> --- a/drivers/watchdog/meson_gxbb_wdt.c
> +++ b/drivers/watchdog/meson_gxbb_wdt.c
> @@ -35,6 +35,17 @@ struct meson_gxbb_wdt {
> struct clk *clk;
> };
>
> +static bool nowayout = WATCHDOG_NOWAYOUT;
> +static unsigned int timeout = DEFAULT_TIMEOUT;
> +
> +module_param(nowayout, bool, 0);
> +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started default="
> + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
> +
> +module_param(timeout, uint, 0);
> +MODULE_PARM_DESC(timeout, "Watchdog heartbeat in seconds="
> + __MODULE_STRING(DEFAULT_TIMEOUT) ")");
> +
> static int meson_gxbb_wdt_start(struct watchdog_device *wdt_dev)
> {
> struct meson_gxbb_wdt *data = watchdog_get_drvdata(wdt_dev);
> @@ -174,7 +185,7 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
> data->wdt_dev.ops = &meson_gxbb_wdt_ops;
> data->wdt_dev.max_hw_heartbeat_ms = GXBB_WDT_TCNT_SETUP_MASK;
> data->wdt_dev.min_timeout = 1;
> - data->wdt_dev.timeout = DEFAULT_TIMEOUT;
> + data->wdt_dev.timeout = timeout;
> watchdog_set_drvdata(&data->wdt_dev, data);
>
> /* Setup with 1ms timebase */
> @@ -186,7 +197,12 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
>
> meson_gxbb_wdt_set_timeout(&data->wdt_dev, data->wdt_dev.timeout);
>
> - watchdog_stop_on_reboot(&data->wdt_dev);
> + watchdog_set_nowayout(&data->wdt_dev, nowayout);
> + watchdog_stop_on_unregister(&data->wdt_dev);
> +
> + dev_info(dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)",
> + data->wdt_dev.timeout, nowayout);
> +
> return devm_watchdog_register_device(dev, &data->wdt_dev);
> }
>
>