[PATCH 05/11] watchdog: ftwdt010: Add restart support
From: Linus Walleij <hidden>
Date: 2017-08-12 18:43:12
Also in:
linux-watchdog
Subsystem:
the rest, watchdog device drivers · Maintainers:
Linus Torvalds, Wim Van Sebroeck, Guenter Roeck
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 <redacted> --- 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