After discussing this mail thread [1] again, we concluded that giving userspace enough time to prepare is our favourite option. So, do not keep the time value when suspended but reset it when resuming.
[1] https://patchwork.kernel.org/patch/10252209/ Signed-off-by: Wolfram Sang <wsa+rene...@sang-engineering.com> --- Fabrizio: can you agree to that? The R-Car BSP team and we (the R-Car upstream team) would prefer it this way (knowing it is also not perfect). drivers/watchdog/renesas_wdt.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c index b570962e84f3..9f2307bf727b 100644 --- a/drivers/watchdog/renesas_wdt.c +++ b/drivers/watchdog/renesas_wdt.c @@ -48,7 +48,6 @@ struct rwdt_priv { void __iomem *base; struct watchdog_device wdev; unsigned long clk_rate; - u16 time_left; u8 cks; }; @@ -263,10 +262,9 @@ static int __maybe_unused rwdt_suspend(struct device *dev) { struct rwdt_priv *priv = dev_get_drvdata(dev); - if (watchdog_active(&priv->wdev)) { - priv->time_left = readw(priv->base + RWTCNT); + if (watchdog_active(&priv->wdev)) rwdt_stop(&priv->wdev); - } + return 0; } @@ -274,10 +272,9 @@ static int __maybe_unused rwdt_resume(struct device *dev) { struct rwdt_priv *priv = dev_get_drvdata(dev); - if (watchdog_active(&priv->wdev)) { + if (watchdog_active(&priv->wdev)) rwdt_start(&priv->wdev); - rwdt_write(priv, priv->time_left, RWTCNT); - } + return 0; } -- 2.11.0
