Using u-boot to update the kernel and root-file system on NAND chip on imx28evk from USB memory stick
All,
I'm needing the ability to upgrade the kernel and root-filesystem
on the NAND chip on the imx28evk from new files that reside on a USB memory stick. That is I want to partition the NAND (mtd) into 3 sections that contain u-boot, kernel, rootfs. Then whenever the system is booted, u-boot will probe the USB memory stick (using fatls and looking for a kernel file and rootfs file) If the files exist on the USB memory stick, uboot will automatically (first it will verify a CRC/Checksum) erase the kernel and rootfs sections on the NAND chip, and then copy the new kernel and rootfs from the USB stick to their respective sections in the flash chip (I think using fatload)?. It will never write a new u-boot.
I've also seen where u-boot can define the NAND flash partitions
using the mtdparts command and pass these along to the kernel via command line args?
Can u-boot write/erase to a nand partition (i.e. /dev/mtd0) instead
of using absolute memory addresses?
Thanks,
Bill
Quoted 13 lines · Bill
All,
I'm needing the ability to upgrade the kernel and root-filesystem on
the NAND chip on the imx28evk from new files that reside on a USB memory stick. That is I want to partition the NAND (mtd) into 3 sections that contain u-boot, kernel, rootfs. Then whenever the system is booted, u-boot will probe the USB memory stick (using fatls and looking for a kernel file and rootfs file) If the files exist on the USB memory stick, uboot will automatically (first it will verify a CRC/Checksum) erase the kernel and rootfs sections on the NAND chip, and then copy the new kernel and rootfs from the USB stick to their respective sections in the flash chip (I think using fatload)?. It will never write a new u-boot.
Quoted 6 lines
I've also seen where u-boot can define the NAND flash partitions
using the mtdparts command and pass these along to the kernel via command line args?Can u-boot write/erase to a nand partition (i.e.
/dev/mtd0) instead
of using absolute memory addresses?
If you use U-Boot's mtdparts support, you can reference partitions by name (mtdparts name, not Linux device node name) in NAND commands.
-Scott
Quoted 18 lines · Scott Wood
Quoted 17 lines · Bill
All,
I'm needing the ability to upgrade the kernel and root-filesystem on
the NAND chip on the imx28evk from new files that reside on a USB memory stick. That is I want to partition the NAND (mtd) into 3 sections that contain u-boot, kernel, rootfs. Then whenever the system is booted, u-boot will probe the USB memory stick (using fatls and looking for a kernel file and rootfs file) If the files exist on the USB memory stick, uboot will automatically (first it will verify a CRC/Checksum) erase the kernel and rootfs sections on the NAND chip, and then copy the new kernel and rootfs from the USB stick to their respective sections in the flash chip (I think using fatload)?. It will never write a new u-boot.I've also seen where u-boot can define the NAND flash partitions
using the mtdparts command and pass these along to the kernel via command line args?
Quoted 5 lines
Quoted 2 lines
Can u-boot write/erase to a nand partition (i.e.
/dev/mtd0) instead
of using absolute memory addresses?If you use U-Boot's mtdparts support, you can reference partitions by name (mtdparts name, not Linux device node name) in NAND commands.
Maybe https://github.com/otavio/u-boot/commit/7ccde26310719a9caef4cbe23bdf080d49d41791
might help?
Signature · 3 lines
Otavio Salvador O.S. Systems E-mail: otavio at ossystems.com.br http://www.ossystems.com.br Mobile: +55 53 9981-7854 http://projetos.ossystems.com.br