LayerscapeのトピックRe: NAND Access in u-boot

NAND Access in u-boot

jagadiswar_rao — Mon, 25 Mar 2019 12:16:26 GMT

Hi Team,

we are using ls2088a custom board, we are using NAND and QSPI are connected to IFC with different chip select .Can we able to access NAND in QSPI-Boot.

Re: NAND Access in u-boot

ufedor — Mon, 25 Mar 2019 14:18:44 GMT

Please explain how QSPI is connected to IFC (attach corresponding schematics).

Re: NAND Access in u-boot

jagadiswar_rao — Tue, 26 Mar 2019 05:29:10 GMT

Hi Ufedor,

I have attached the schematic as pdf format of the QSPI connection to IFC.

Re: NAND Access in u-boot

ufedor — Tue, 26 Mar 2019 05:45:37 GMT

Picture quality is not suitable for inspection - please provide PDF.

Re: NAND Access in u-boot

ufedor — Tue, 26 Mar 2019 07:05:09 GMT

You wrote:

> NAND and QSPI are connected to IFC

In the provided schematics only NAND devices are connected to the IFC.

NAND has to be accessible after QSPI boot assuming that RCW with correct signals multiplexing is applied.

Re: NAND Access in u-boot

jagadiswar_rao — Tue, 26 Mar 2019 10:38:59 GMT

attached a schematic file check this one as a reference.How can we able to access nand on qspi-boot for this.

Re: NAND Access in u-boot

ufedor — Tue, 26 Mar 2019 12:07:37 GMT

There are no obvious errors in the QSPI_3.pdf.

> How can we able to access nand on qspi-boot for this.

Sorry, what do you mean?

Re: NAND Access in u-boot

jagadiswar_rao — Tue, 26 Mar 2019 12:51:59 GMT

required to load kernel on NAND flash from u-boot which is booted from qspi flash.Currently i am using LS2088ardb_qspi_defconfig for compilation of u-boot in this i am not able to access NAND in u-boot prompt.

attaching u-boot logs.

Re: NAND Access in u-boot

ufedor — Tue, 26 Mar 2019 13:47:18 GMT

There is no hardware issue with the design.

Please create separate question for the U-Boot "nand" issue.