i.MX ProcessorsのトピックRe: SysVinit hang on boot

SysVinit hang on boot

peterbärtsch — Tue, 10 Jan 2017 10:43:51 GMT

I have a problem with init application. When the device reboot (not after power up) sometimes the init hang.

Console output:

Kernel image @ 0x82000000 [ 0x000000 - 0x3dc1f0 ]
## Flattened Device Tree blob at 88000000
Booting using the fdt blob at 0x88000000
Loading Device Tree to 8df21000, end 8df2c0af ... OK

Starting kernel ...

[ 1.219227] snvs-secvio 20cc000.caam-snvs: can't get snvs clock
[ 1.228998] cpu cpu0: dev_pm_opp_get_opp_count: device OPP not found (-19)
INIT: version 2.88 booting <--Now it hangs

When press some keys then it continues boot. I also try to remove all init scripts in rcS folder but the application hangs before it starts the scripts.

I use the imx6sx hw with actual linux-fslc-imx_4.1-1.0.x kernel.

Thx for help

Peter

Re: SysVinit hang on boot

igorpadykov — Tue, 10 Jan 2017 23:31:52 GMT

Hi Peter

the reason may be that WDOG_B pin not connected to external PMIC,

as done in Sabre SD board schematic spf-27392 p.21

Schematics (1)
i.MX6_SABRE_SDP_DESIGNFILES
http://www.nxp.com/products/software-and-tools/hardware-development-tools/sabre-development-system/sabre-platform-for-smart-devices-based-on-the-i.mx-6-series:RDIMX6SABREPLAT?fpsp=1&tab=Design_Tools_Tab

For example , in LDO-bypass if just before reboot it is under lowest cpu freq stepoint , but that voltage can not
make system boot up at default 800MHZ , so there is need use WDOG_B to reset PMIC.

Best regards
igor
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Re: SysVinit hang on boot

peterbärtsch — Wed, 11 Jan 2017 16:08:58 GMT

Hi igor

I compared the kernel config with the standard linux-imx kernel config and found some differences.

Now it works :smileyhappy:

Thx for help