topic Re: LS1012ARDB - Bare minimum HW resources required by LSDK in Layerscape

LS1012ARDB - Bare minimum HW resources required by LSDK

christophe_schm — Mon, 17 Feb 2020 13:30:59 GMT

Hello,

I've a question regarding the absolute bare minimum of HW resources LSDK19.09 supports where I can build both firmware and boot partition/RFS user land and run a (even very small) fully fledged Linux at the end.

The LS1012ARDB originally comes with this:

DDR: 1 GB (MT41K512M16HA)
QSPI: 512 MB (S25FS512SAGMFI011)
eMMC: 4G (MTFC4GACAAAM-1M WT)

My question, can a LSDK19.09 setup with following HW resources be compiled, flashed and startup with no pain:

DDR: 128 MB (MT41K64M16TW-107:J TR)
QSPI: 128 MB (S25FS128SAGNFI003)
eMMC: 8G (SDINBDG4-8G, iNAND® 7250)

What are tweaks I've to know about to squeeze all this into my reduced memory HW resource setup.

And, looks this reasonable and feasible or shall I better add more memory and where?

Some build parameters so I can test very welcome!

Thx Christophe

Re: LS1012ARDB - Bare minimum HW resources required by LSDK

yipingwang — Tue, 18 Feb 2020 07:00:41 GMT

Hello Christophe SCHMID ,

You need to modify ls1012ardb u-boot source code according to your custom board.

$flex-builder -c uboot -m ls1012ardb

Please go to uboot source code folder packages/firmware/u-boot, please modify include/configs/ls1012ardb.h

#define CONFIG_SYS_SDRAM_SIZE 0x40000000

#define CONFIG_SYS_SDRAM_SIZE 0x10000000

Please add the following.

#undef FSL_QSPI_FLASH_SIZE
#define FSL_QSPI_FLASH_SIZE SZ_16M

Then rebuild u-boot with the following command (remove build/firmware/u-boot/ls1012ardb/output/ls1012ardb_tfa_defconfig/)

$flex-builder -c uboot -m ls1012ardb

Thanks,

Yiping

Re: LS1012ARDB - Bare minimum HW resources required by LSDK

christophe_schm — Tue, 18 Feb 2020 07:24:27 GMT

Hello yipingwang‌,

Thank you for the details, I will test that out.

There were other questions also about the boot partition + RFS I'd like to squeeze.

But first: is LS1012A (and its RDB) only able to boot on QSPI or can it boot on eMMC too? Think was only QSPI, right?

Because my idea is as following

Firmware (all bootloaders, TF-A, secure mode) --> goes QSPI
Linux boot partition + RFS user land --> goes eMMC
I keep USB and SD slots free on the RDB (I need them for other purpose)

So, now that you told me how to configure u-boot (but that's only part of the answer about firmware), can you please also tell me how I possibly can squeeze in the Linux into the embedded 4 G eMMC of the LS1012ARDB? Possible or do I need more space? There also please if you can provide me some hints I'd be very thankful.

Best regards,

Christophe

Re: LS1012ARDB - Bare minimum HW resources required by LSDK

yipingwang — Wed, 19 Feb 2020 08:48:16 GMT

Please refer to https://community.nxp.com/thread/524737 .