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| author |   Fabrizio Castro <fabrizio.castro@bp.renesas.com> | 2018-03-05 15:30:26 +0000 |
|---|---|---|
| committer |   Wim Van Sebroeck <wim@linux-watchdog.org> | 2018-03-10 11:45:35 +0100 |
| commit | 089bcaa87e772beb005068a5ef28c71bb895d01d (patch) | |
| tree | e4d9f0d111f6b022617f866e66cfd39f9a6a1cbc /drivers/watchdog | |
| parent | watchdog: renesas_wdt: Add R-Car Gen2 support (diff) | |
| download | linux-dev-089bcaa87e772beb005068a5ef28c71bb895d01d.tar.xz linux-dev-089bcaa87e772beb005068a5ef28c71bb895d01d.zip | |
watchdog: renesas_wdt: Add restart handler
On iWave's boards iwg20d and iwg22d the only way to reboot the system is
by means of the watchdog.
This patch adds a restart handler to rwdt_ops, and also makes sure we
keep its priority to the lowest level, in order to not override other
more effective handlers.
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/renesas_wdt.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c index 0dede5beb3f1..6b8c6ddfe30b 100644 --- a/drivers/watchdog/renesas_wdt.c +++ b/drivers/watchdog/renesas_wdt.c @@ -110,6 +110,16 @@ static unsigned int rwdt_get_timeleft(struct watchdog_device *wdev) return DIV_BY_CLKS_PER_SEC(priv, 65536 - val); } +static int rwdt_restart(struct watchdog_device *wdev, unsigned long action, + void *data) +{ + struct rwdt_priv *priv = watchdog_get_drvdata(wdev); + + rwdt_start(wdev); + rwdt_write(priv, 0xffff, RWTCNT); + return 0; +} + static const struct watchdog_info rwdt_ident = { .options = WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT, .identity = "Renesas WDT Watchdog", @@ -121,6 +131,7 @@ static const struct watchdog_ops rwdt_ops = { .stop = rwdt_stop, .ping = rwdt_init_timeout, .get_timeleft = rwdt_get_timeleft, + .restart = rwdt_restart, }; #if defined(CONFIG_ARCH_RCAR_GEN2) && defined(CONFIG_SMP) @@ -220,6 +231,7 @@ static int rwdt_probe(struct platform_device *pdev) platform_set_drvdata(pdev, priv); watchdog_set_drvdata(&priv->wdev, priv); watchdog_set_nowayout(&priv->wdev, nowayout); + watchdog_set_restart_priority(&priv->wdev, 0); /* This overrides the default timeout only if DT configuration was found */ ret = watchdog_init_timeout(&priv->wdev, 0, &pdev->dev); |