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watchdog: ftwdt010_wdt: implement _restart() function

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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.

Suggested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sergei Antonov <saproj@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220829090436.452742-1-saproj@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Sergei Antonov 2022-08-29 12:04:36 +03:00 committed by Wim Van Sebroeck
parent 5a9fbf8b80
commit 64ee937509
1 changed files with 19 additions and 4 deletions
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23
drivers/watchdog/ftwdt010_wdt.c
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@ -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,
};