i.MX ProcessorsのトピックRe: emmc boot_config boot_bus_config

emmc boot_config boot_bus_config

amf99 — Thu, 16 Nov 2017 14:00:57 GMT

after configuring emmc boot_config and boot_bus_config and then booting from emmc with squashfs as root file system, the device will not boot a second time. Is squashfs some how resetting these two config values? It works fine with a sdcard.

Linux 3.14.28

iMX6SX

amf

Re: emmc boot_config boot_bus_config

igorpadykov — Mon, 20 Nov 2017 23:34:52 GMT

HI Alric

one can read SRC_SBMR1,2 registers with jtag to check

if boot configuration is sampled correctly. To perform correct reboot second time

all board should be reset, including pmic. Is it working with nxp linux describing in

i.MX 6 / i.MX 7 Series Software and Development Tool|NXP

If not all board reset, squashfs may some how leave some board components in state

which affect boot.

Best regards
igor
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Re: emmc boot_config boot_bus_config

amf99 — Tue, 21 Nov 2017 12:34:48 GMT

Thanks for getting back Igor

I added an init script to set boot_config and boot_bus_config on each boot, this took care of the issue,

I'll look into the SRC_SBMR1,2 registers values, need to get the jtag setup.

Thanks,

amf

Re: emmc boot_config boot_bus_config

yilingxu — Tue, 04 Sep 2018 09:18:27 GMT

Hi,

I also need a squashfs file system, but I do not know how to make it. Where did you get squashfs?

Thanks!

Yiling Xu

Re: emmc boot_config boot_bus_config

amf99 — Tue, 04 Sep 2018 11:11:47 GMT

Hi Yiling,

If your building your image via Yocto, add this to your local.conf file

IMAGE_FSTYPES += "squashfs"