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authorWolfram Sang <wsa+renesas@sang-engineering.com>2018-12-04 12:01:46 (GMT)
committerWim Van Sebroeck <wim@linux-watchdog.org>2018-12-22 11:15:32 (GMT)
commit9077123c68074619177c9a8d3adce2527bd94179 (patch)
tree1d393b993e64ae9d2c41a23aa8c97607ae829633 /drivers/watchdog
parent248e655b45ed2ce98aee9de439616fdd2b78b0f5 (diff)
watchdog: renesas_wdt: don't keep timer value during suspend/resume
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+renesas@sang-engineering.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/renesas_wdt.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c
index c450e23..622ede5 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;
};
@@ -268,10 +267,9 @@ 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;
}
@@ -279,10 +277,9 @@ 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;
}

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