This enables the Faraday FTWDT010 to restart the system,
if need be. Set the restart priority for the watchdog to
128.
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
drivers/watchdog/ftwdt010_wdt.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/watchdog/ftwdt010_wdt.c b/drivers/watchdog/ftwdt010_wdt.c
index 680279f5c679..7fc865eea28d 100644
--- a/drivers/watchdog/ftwdt010_wdt.c
+++ b/drivers/watchdog/ftwdt010_wdt.c
@@ -56,6 +56,22 @@ struct ftwdt010_wdt *to_ftwdt010_wdt(struct watchdog_device *wdd)
return container_of(wdd, struct ftwdt010_wdt, wdd);
}
+static int ftwdt010_wdt_restart(struct watchdog_device *wdd,
+ unsigned long action, void *data)
+{
+ struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd);
+ u32 enable;
+
+ writel(1, gwdt->base + FTWDT010_WDLOAD);
+ writel(WDRESTART_MAGIC, gwdt->base + FTWDT010_WDRESTART);
+ enable = WDCR_SYS_RST | WDCR_ENABLE;
+ if (gwdt->use_extclk)
+ enable |= WDCR_EXTCLK;
+ writel(enable, gwdt->base + FTWDT010_WDCR);
+
+ return 0;
+}
+
static int ftwdt010_wdt_start(struct watchdog_device *wdd)
{
struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd);
@@ -118,6 +134,7 @@ 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,
};
@@ -201,6 +218,7 @@ static int ftwdt010_wdt_probe(struct platform_device *pdev)
*/
gwdt->wdd.timeout = 13U;
watchdog_init_timeout(&gwdt->wdd, 0, dev);
+ watchdog_set_restart_priority(&gwdt->wdd, 128);
reg = readw(gwdt->base + FTWDT010_WDCR);
if (reg & WDCR_ENABLE) {
--
2.13.4
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