Disable the watchdog powerdown counter at start. Otherwise this may
trigger a reset or poweroff over the WDOG_B line to a PMIC. This counter
is set to 16 seconds after poweron.
Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
---
drivers/watchdog/imxwd.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/watchdog/imxwd.c b/drivers/watchdog/imxwd.c
index 42edfe00d2bc..3479d7b02da7 100644
--- a/drivers/watchdog/imxwd.c
+++ b/drivers/watchdog/imxwd.c
@@ -46,6 +46,7 @@ struct imx_wd {
#define IMX21_WDOG_WCR 0x00 /* Watchdog Control Register */
#define IMX21_WDOG_WSR 0x02 /* Watchdog Service Register */
#define IMX21_WDOG_WSTR 0x04 /* Watchdog Status Register */
+#define IMX21_WDOG_WMCR 0x08 /* Misc Register */
#define IMX21_WDOG_WCR_WDE (1 << 2)
#define IMX21_WDOG_WCR_SRS (1 << 4)
#define IMX21_WDOG_WCR_WDA (1 << 5)
@@ -158,6 +159,11 @@ static int imx21_wd_init(struct imx_wd *priv)
{
imx_watchdog_detect_reset_source(priv);
+ /*
+ * Disable watchdog powerdown counter
+ */
+ writew(0x0, priv->base + IMX21_WDOG_WMCR);
+
return 0;
}
--
2.1.4
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