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wdog: imx-wd: Disable watchdog powerdown counter 

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@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Markus Pargmann 2015-04-09 15:31:56 +02:00 committed by Sascha Hauer
parent 564a6092ba
commit 4cc0a3d9c5
1 changed files with 6 additions and 0 deletions
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6
drivers/watchdog/imxwd.c
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@ -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;
}