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i want to use use the imx6ul internal watchdog nWdog ?

Question asked by liu jun on Jan 17, 2019
Latest reply on Jan 21, 2019 by Yuri Muhin
pcb

 

Configuration is as follows:
devicetree:
&wdog1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_wdog>;
fsl,wdog_b;
fsl,use-wre;
fsl,ext-reset-output;
};
....
//add 内部看门狗的引脚配置
pinctrl_wdog: wdoggrp {
fsl,pins = <
MX6UL_PAD_LCD_RESET__WDOG1_WDOG_ANY 0x30b0
>;
};
use wdog1  .
i use imx_4.1.15_2.0.0_ga of  imx2_wdt.c:
Successful configuration
but..
When the board is up, the pin is at a high level. After the software watchdog resets the pin,only power-on again ,this pin is high level.
why???  i want to use internal watchdog

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