How to add Watchdog in U-boot for 2014 version yocto source

[bandarulavanya]

Hi All,

I added watchdog timer in u boot like below .

in include/configs/imx6dl-sabresd.h

     #define CONFIG_IMX_CONFIG

in /board/freescale/imx6dl-sabresd/imx6dl-sabresd.c

int board_late_init(void)

{

        int ret = 0;

#ifdef CONFIG_CMD_BMODE

        add_board_boot_modes(board_boot_modes);

#endif

#ifdef CONFIG_SYS_I2C_MXC

        setup_i2c(1, CONFIG_SYS_I2C_SPEED,

                        0x7f, &i2c_pad_info1);

        ret = setup_pmic_voltages();

        if (ret)

                return -1;

#endif

#ifdef CONFIG_ENV_IS_IN_MMC

        board_late_mmc_env_init();

#endif

#ifdef CONFIG_IMX_WATCHDOG

        hw_watchdog_init();

#endif

        return 0;

}

like this.

If i stop in u-boot after my time out it is rebooting . if any crash occur in kernel in that time also it is rebooting.

But if file system is not mounted then it is not rebooting how can i achieve that.

and after enabling watchdog in u boot. my wdt_driver_test.out in unit-tests is not working.

unit-tests$ ./wdt_driver_test.out 10 5 0

Here after i given ctrl+c also it is not rebooting.

unit-tests$ ./wdt_driver_test.out 1 2 0

In this case also after 1 sec it should reboot but it is not.How can i solve this issue please if any one knows kindly suggest me.

Thanks & Regards,
Lavany

[igorpadykov]

Hi Lavany

seems you are using some customized uboot version,

could you try with nxp uboot-imx

uboot-imx.git - Freescale i.MX u-boot Tree

unit-tests are working properly with nxp linux&uboot.

Best regards

igor

[bandarulavanya]

Hi igorpadykov ,

Sorry , actually uboot version is 2014 not 2013 that i got from yocto setup.

Thanks

Lavanya

[bandarulavanya]

Hi igorpadykov ,
In my kernel dts file i have like this

&gpc {

        /* use ldo-bypass, u-boot will check it and configure */

        fsl,ldo-bypass = <0>;

        fsl,wdog-reset = <1>;

};

&wdog1 {

        status = "okay";

};

so now if i am running

./wdt_driver_test.out 10 5 0

Starting wdt_driver (timeout: 10, sleep: 5, test: ioctl)

Trying to set timeout value=10 seconds

The actual timeout was set to 10 seconds

Now reading back -- The timeout is 10 seconds

^C

Now exactly after 10 seconds it is rebooting.

In U-boot also i am trying to enable wdog.For that i did like below.

In board file i added like this in board_late_init function

#ifdef CONFIG_IMX_WATCHDOG

        hw_watchdog_init();

#endif

and in includes/configs/custom_board.h file   #define CONFIG_IMX_WATCHDOG 1

and i reduced time in drivers/watchdog/imx_watchdog.c

//#define CONFIG_WATCHDOG_TIMEOUT_MSECS 128000

#define CONFIG_WATCHDOG_TIMEOUT_MSECS 12000

after enabling wdt in u boot my kernel watchdog is not working what ever time i given , it is taking more than 5 mins to reboot.

and in log i observed like below after enabling watchdog in u boot

Starting udev

udevd[130]: starting version 182

bootlogd: cannot allocate pseudo tty: No such file or directory

random: dd urandom read with 95 bits of entropy available

ALSA: Restoring mixer settings...

/usr/sbin/alsactl: load_state:1729: No soundcards found...

Mon May 30 11:44:05 UTC 2016

random: nonblocking pool is initialized

INIT: Entering runlevel: 5

Configuring network interfaces... fec 2188000.ethernet eth0: no PHY, assuming direct connection to switch

libphy: PHY fixed-0:00 not found

fec 2188000.ethernet eth0: could not attach to PHY

ifconfig: SIOCSIFFLAGS: No such device

Starting Xserver

Starting system message bus: dbus.

Starting rpcbind daemon...done.

Starting advanced power management daemon: No APM support in kernel

(failed.)

Starting syslogd/klogd: done

* Starting Avahi mDNS/DNS-SD Daemon: avahi-daemon

   ...done.

Starting Telephony daemon

Starting Linux NFC daemon

Starting OProfileUI server

PU: Power-on latency exceeded, new value 4670334 ns {if watchdog is not enabled in u boot it is not coming}

How to solve this issue if any one knows kindly help me .

Thanks & Regards,

Lavanya

[igorpadykov]

Hi Lavanya

wdog should not be enabled twice as some bits could

be written once. In general nxp has service helping with customization

NXP Professional Services:

http://www.nxp.com/support/nxp-professional-services:PROFESSIONAL-SERVICE

Pro-Support contact www.nxp.com/prosupport

Best regards

igor

[bandarulavanya]

Hi igorpadykov ,

i observed that i got random: nonblocking pool is initialized In this case watchdog is taking more than 5mins to reboot and some times not rebooting if it is not coming then wdt is working properly .

how to solve this error .

Thanks & Regards,

Lavanya

[igorpadykov]

Hi Lavanya

also one can post that on uboot mail list

U-Boot Info Page

Best regards

igor

[bandarulavanya]

igorpadykov ,

But in 3.0.35 kernel watchdog is working properly i enabled both u boot and kernel .

but in yocto setup u boot with 2014 and kernel with 3.14.28 is giving problem

[igorpadykov]

Hi Lavanya

in nxp uboot there is no ../imx6dl-sabresd/imx6dl-sabresd.c

could you try with nxp uboot-imx

Best regards

igor

[bandarulavanya]

Hi ,

mx6sabresd.h this is original file that is for my custom board .

mx6sabresd/mx6sabresd.c are correct names , i want why that u-boot watchdog is not releasing when i reach kernel.

Thanks & Regards,

Lavanya