The watchdog resets the system if the watchdog gets pinged to fast.
Between each watchdog ping must be a pause of at least 200ms.
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
---
drivers/mfd/da9063.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/mfd/da9063.c b/drivers/mfd/da9063.c
index 4d459c7f18..ab57885240 100644
--- a/drivers/mfd/da9063.c
+++ b/drivers/mfd/da9063.c
@@ -14,6 +14,7 @@
*/
#include <common.h>
+#include <clock.h>
#include <driver.h>
#include <gpio.h>
#include <restart.h>
@@ -33,6 +34,7 @@ struct da9063 {
struct i2c_client *client1;
struct device_d *dev;
unsigned int timeout;
+ uint64_t last_ping;
};
/* forbidden/impossible value; timeout will be set to this value initially to
@@ -237,6 +239,13 @@ static int da9063_watchdog_ping(struct da9063 *priv)
int ret;
u8 val;
+ /* We need to wait at least 200ms till we can resend a ping */
+ if (!is_timeout_non_interruptible(priv->last_ping, 200 * MSECOND)) {
+ dev_dbg(priv->dev, "active ping delay\n");
+ mdelay(50);
+ return da9063_watchdog_ping(priv);
+ }
+
dev_dbg(priv->dev, "ping\n");
/* reset watchdog timer; register is self clearing */
@@ -245,6 +254,8 @@ static int da9063_watchdog_ping(struct da9063 *priv)
if (ret < 0)
return ret;
+ priv->last_ping = get_time_ns();
+
return 0;
}
--
2.20.1
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
