* [PATCH v2] watchdog: ftwdt010_wdt: implement _restart() function
@ 2022-08-27 14:24 Sergei Antonov
2022-08-28 14:39 ` Guenter Roeck
0 siblings, 1 reply; 3+ messages in thread
From: Sergei Antonov @ 2022-08-27 14:24 UTC (permalink / raw)
To: linux-watchdog; +Cc: wim, linux, Sergei Antonov
Implement ftwdt010_wdt_restart(). It enables watchdog with timeout = 0
and disabled IRQ. Since it needs code similar to ftwdt010_wdt_start(),
add a new function ftwdt010_enable() and move common code there.
v1 -> v2:
Do not let IRQ trigger when restarting.
Add a helper function ftwdt010_enable().
Suggested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sergei Antonov <saproj@gmail.com>
---
drivers/watchdog/ftwdt010_wdt.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
diff --git a/drivers/watchdog/ftwdt010_wdt.c b/drivers/watchdog/ftwdt010_wdt.c
index 21dcc7765688..0a5bbfd2823f 100644
--- a/drivers/watchdog/ftwdt010_wdt.c
+++ b/drivers/watchdog/ftwdt010_wdt.c
@@ -47,21 +47,28 @@ struct ftwdt010_wdt *to_ftwdt010_wdt(struct watchdog_device *wdd)
return container_of(wdd, struct ftwdt010_wdt, wdd);
}
-static int ftwdt010_wdt_start(struct watchdog_device *wdd)
+static void ftwdt010_enable(struct ftwdt010_wdt *gwdt,
+ unsigned int timeout,
+ bool need_irq)
{
- struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd);
u32 enable;
- writel(wdd->timeout * WDT_CLOCK, gwdt->base + FTWDT010_WDLOAD);
+ writel(timeout * WDT_CLOCK, gwdt->base + FTWDT010_WDLOAD);
writel(WDRESTART_MAGIC, gwdt->base + FTWDT010_WDRESTART);
/* set clock before enabling */
enable = WDCR_CLOCK_5MHZ | WDCR_SYS_RST;
writel(enable, gwdt->base + FTWDT010_WDCR);
- if (gwdt->has_irq)
+ if (need_irq)
enable |= WDCR_WDINTR;
enable |= WDCR_ENABLE;
writel(enable, gwdt->base + FTWDT010_WDCR);
+}
+static int ftwdt010_wdt_start(struct watchdog_device *wdd)
+{
+ struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd);
+
+ ftwdt010_enable(gwdt, wdd->timeout, gwdt->has_irq);
return 0;
}
@@ -93,6 +100,13 @@ static int ftwdt010_wdt_set_timeout(struct watchdog_device *wdd,
return 0;
}
+static int ftwdt010_wdt_restart(struct watchdog_device *wdd,
+ unsigned long action, void *data)
+{
+ ftwdt010_enable(to_ftwdt010_wdt(wdd), 0, false);
+ return 0;
+}
+
static irqreturn_t ftwdt010_wdt_interrupt(int irq, void *data)
{
struct ftwdt010_wdt *gwdt = data;
@@ -107,6 +121,7 @@ static const struct watchdog_ops ftwdt010_wdt_ops = {
.stop = ftwdt010_wdt_stop,
.ping = ftwdt010_wdt_ping,
.set_timeout = ftwdt010_wdt_set_timeout,
+ .restart = ftwdt010_wdt_restart,
.owner = THIS_MODULE,
};
--
2.34.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] watchdog: ftwdt010_wdt: implement _restart() function
2022-08-27 14:24 [PATCH v2] watchdog: ftwdt010_wdt: implement _restart() function Sergei Antonov
@ 2022-08-28 14:39 ` Guenter Roeck
2022-08-29 9:03 ` Sergei Antonov
0 siblings, 1 reply; 3+ messages in thread
From: Guenter Roeck @ 2022-08-28 14:39 UTC (permalink / raw)
To: Sergei Antonov, linux-watchdog; +Cc: wim
On 8/27/22 07:24, Sergei Antonov wrote:
> Implement ftwdt010_wdt_restart(). It enables watchdog with timeout = 0
> and disabled IRQ. Since it needs code similar to ftwdt010_wdt_start(),
> add a new function ftwdt010_enable() and move common code there.
>
> v1 -> v2:
> Do not let IRQ trigger when restarting.
> Add a helper function ftwdt010_enable().
>
Version history should be after ---. Otherwise
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> Suggested-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Sergei Antonov <saproj@gmail.com>
> ---
> drivers/watchdog/ftwdt010_wdt.c | 23 +++++++++++++++++++----
> 1 file changed, 19 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/watchdog/ftwdt010_wdt.c b/drivers/watchdog/ftwdt010_wdt.c
> index 21dcc7765688..0a5bbfd2823f 100644
> --- a/drivers/watchdog/ftwdt010_wdt.c
> +++ b/drivers/watchdog/ftwdt010_wdt.c
> @@ -47,21 +47,28 @@ struct ftwdt010_wdt *to_ftwdt010_wdt(struct watchdog_device *wdd)
> return container_of(wdd, struct ftwdt010_wdt, wdd);
> }
>
> -static int ftwdt010_wdt_start(struct watchdog_device *wdd)
> +static void ftwdt010_enable(struct ftwdt010_wdt *gwdt,
> + unsigned int timeout,
> + bool need_irq)
> {
> - struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd);
> u32 enable;
>
> - writel(wdd->timeout * WDT_CLOCK, gwdt->base + FTWDT010_WDLOAD);
> + writel(timeout * WDT_CLOCK, gwdt->base + FTWDT010_WDLOAD);
> writel(WDRESTART_MAGIC, gwdt->base + FTWDT010_WDRESTART);
> /* set clock before enabling */
> enable = WDCR_CLOCK_5MHZ | WDCR_SYS_RST;
> writel(enable, gwdt->base + FTWDT010_WDCR);
> - if (gwdt->has_irq)
> + if (need_irq)
> enable |= WDCR_WDINTR;
> enable |= WDCR_ENABLE;
> writel(enable, gwdt->base + FTWDT010_WDCR);
> +}
>
> +static int ftwdt010_wdt_start(struct watchdog_device *wdd)
> +{
> + struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd);
> +
> + ftwdt010_enable(gwdt, wdd->timeout, gwdt->has_irq);
> return 0;
> }
>
> @@ -93,6 +100,13 @@ static int ftwdt010_wdt_set_timeout(struct watchdog_device *wdd,
> return 0;
> }
>
> +static int ftwdt010_wdt_restart(struct watchdog_device *wdd,
> + unsigned long action, void *data)
> +{
> + ftwdt010_enable(to_ftwdt010_wdt(wdd), 0, false);
> + return 0;
> +}
> +
> static irqreturn_t ftwdt010_wdt_interrupt(int irq, void *data)
> {
> struct ftwdt010_wdt *gwdt = data;
> @@ -107,6 +121,7 @@ static const struct watchdog_ops ftwdt010_wdt_ops = {
> .stop = ftwdt010_wdt_stop,
> .ping = ftwdt010_wdt_ping,
> .set_timeout = ftwdt010_wdt_set_timeout,
> + .restart = ftwdt010_wdt_restart,
> .owner = THIS_MODULE,
> };
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] watchdog: ftwdt010_wdt: implement _restart() function
2022-08-28 14:39 ` Guenter Roeck
@ 2022-08-29 9:03 ` Sergei Antonov
0 siblings, 0 replies; 3+ messages in thread
From: Sergei Antonov @ 2022-08-29 9:03 UTC (permalink / raw)
To: Guenter Roeck; +Cc: linux-watchdog, wim
On Sun, 28 Aug 2022 at 17:39, Guenter Roeck <linux@roeck-us.net> wrote:
>
> On 8/27/22 07:24, Sergei Antonov wrote:
> > Implement ftwdt010_wdt_restart(). It enables watchdog with timeout = 0
> > and disabled IRQ. Since it needs code similar to ftwdt010_wdt_start(),
> > add a new function ftwdt010_enable() and move common code there.
> >
> > v1 -> v2:
> > Do not let IRQ trigger when restarting.
> > Add a helper function ftwdt010_enable().
> >
>
> Version history should be after ---.
Thanks. Forgot about it. I will send v3 then with only that little change.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-08-27 14:24 [PATCH v2] watchdog: ftwdt010_wdt: implement _restart() function Sergei Antonov
2022-08-28 14:39 ` Guenter Roeck
2022-08-29 9:03 ` Sergei Antonov
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