From: Steffen Trumtrar <[email protected]> The only way of stopping the watchdog is by resetting it. Add the watchdog op for stopping the device and reset if a reset line is provided.
Signed-off-by: Steffen Trumtrar <[email protected]> Signed-off-by: Oleksij Rempel <[email protected]> Cc: Wim Van Sebroeck <[email protected]> Cc: Guenter Roeck <[email protected]> Cc: [email protected] --- changes v2: - test if dw_wdt->rst is NULL instead of IS_ERR drivers/watchdog/dw_wdt.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c index 36be987ff9ef..a507f36302e1 100644 --- a/drivers/watchdog/dw_wdt.c +++ b/drivers/watchdog/dw_wdt.c @@ -135,6 +135,21 @@ static int dw_wdt_start(struct watchdog_device *wdd) return 0; } +static int dw_wdt_stop(struct watchdog_device *wdd) +{ + struct dw_wdt *dw_wdt = to_dw_wdt(wdd); + + if (!dw_wdt->rst) { + dev_warn(wdd->parent, "No reset line. Will not stop.\n"); + return -EOPNOTSUPP; + } + + reset_control_assert(dw_wdt->rst); + reset_control_deassert(dw_wdt->rst); + + return 0; +} + static int dw_wdt_restart(struct watchdog_device *wdd, unsigned long action, void *data) { @@ -173,6 +188,7 @@ static const struct watchdog_info dw_wdt_ident = { static const struct watchdog_ops dw_wdt_ops = { .owner = THIS_MODULE, .start = dw_wdt_start, + .stop = dw_wdt_stop, .ping = dw_wdt_ping, .set_timeout = dw_wdt_set_timeout, .get_timeleft = dw_wdt_get_timeleft, -- 2.11.0
