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To try this article we need a bootable Linux microSD for Acqua A5. Create one by following this article in case you haven't it:
Boot Linux on your Acqua A5 and access to its command line as acme user via SSH or debug port:
login: acme
password: acmesystems
Launch a package index update:
sudo apt update
then install the mtd-utils package
sudo apt install mtd-utils
Create a 200MB lenght file of random numbers to use as sample for the test by typing:
dd if=/dev/urandom of=sample bs=1M count=200
Check its lenght by typing:
ls -al sample
Create a new directory and mount on it the NAND FLASH
sudo ubiformat /dev/mtd0
sudo ubiattach -p /dev/mtd0
sudo ubimkvol /dev/ubi0 -N rootfs -m
sudo mount -t ubifs /dev/ubi0_0 /mnt/ubifs
Save the ramdom sample file on the NAND FLASH partition and check if the copy is correct by typing:
md5sum sample
ff46a364e90d22ba6d218bf20511d55b sample
md5 /mnt/ubifs/sample
ff46a364e90d22ba6d218bf20511d55b /mnt/ubifs/sample
Umount the NAND FLASH
sudo umount /mnt/ubifs
Place this definition under ahb section inside the device tree
ahb {
ebi@10000000 {
pinctrl-0 = <&pinctrl_ebi_addr &pinctrl_ebi_cs0>;
pinctr-name = "default";
status = "okay";
nand_controller: nand-controller {
status = "okay";
nand@3 {
reg = <0x3 0x0 0x2>;
atmel,rb = <0>;
nand-ecc-mode = "hw";
nand-ecc-strength = <4>;
nand-ecc-step-size = <512>;
nand-on-flash-bbt;
label = "atmel_nand";
};
};
};
}
Device tree source used on Kernel 4.19.x
Device tree blob used on Kernel 4.19.x
Save the old version of at91-sama5d3_acqua.dtb saved in the first partition of microSD and replace with this file renamed in at91-sama5d3_acqua.dtb.
Older version of this article:
