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Commit 5fe65ce7 authored by Markus Pargmann's avatar Markus Pargmann Committed by Wim Van Sebroeck
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watchdog: imx2_wdt: Disable power down counter on boot 



Disable power down counter of the watchdog to avoid system resets. The
watchdog power down counter is set automatically by the chip. If it is
not set to 0 in the driver, the system resets.

Signed-off-by: default avatarMarkus Pargmann <mpa@pengutronix.de>
Acked-by: default avatarShawn Guo <shawn.guo@linaro.org>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent bbd59009

drivers/watchdog/imx2_wdt.c

+9 −0
Original line number Diff line number Diff line
@@ -52,6 +52,8 @@ 
#define IMX2_WDT_WRSR		0x04		/* Reset Status Register */

#define IMX2_WDT_WRSR_TOUT	(1 << 1)	/* -> Reset due to Timeout */



#define IMX2_WDT_WMCR		0x08		/* Misc Register */



#define IMX2_WDT_MAX_TIME	128

#define IMX2_WDT_DEFAULT_TIME	60		/* in seconds */
@@ -274,6 +276,13 @@ static int __init imx2_wdt_probe(struct platform_device *pdev) 


	imx2_wdt_ping_if_active(wdog);



	/*

	 * Disable the watchdog power down counter at boot. Otherwise the power

	 * down counter will pull down the #WDOG interrupt line for one clock

	 * cycle.

	 */

	regmap_write(wdev->regmap, IMX2_WDT_WMCR, 0);



	ret = watchdog_register_device(wdog);

	if (ret) {

		dev_err(&pdev->dev, "cannot register watchdog device\n");