I think I have everything set up to access MTD (and UBI) devices as
"block", however, lsblk always ignores them, and refuses to list
anything but the mmc. I can read ubifs and boot from it though, and
since UBI runs on top of MTD block devices, MTD block device should be
working, right?
I also have UBI_BLOCK enabled, so I would expect UBI volumes to appear
in the "lsblk" as well.
Example U-boot session:
Zynq> mtd list
SF: Detected n25q256ax1 with page size 256 Bytes, erase size 64 KiB,
total 32 MiB
List of MTD devices:
* nor0
- device: flash@0
- parent: spi@e000d000
- driver: jedec_spi_nor
- path: /axi/spi@e000d000/flash@0
- type: NOR flash
- block size: 0x10000 bytes
- min I/O: 0x1 bytes
- 0x000000000000-0x000002000000 : "nor0"
- 0x000000000000-0x000000100000 : "qspi-boot-bin"
- 0x000000100000-0x000002000000 : "qspi-rootfs"
Zynq> lsblk
Block Driver Devices
-----------------------------
efi_blk : <none>
mmc_blk : mmc 0
mtd_blk : <none>
ubi_blk : <none>
usb_storage_blk : <none>
Zynq> ubi part qspi-rootfs
Zynq> ubi list
0: qspi-rootfs
Zynq> lsblk
Block Driver Devices
-----------------------------
efi_blk : <none>
mmc_blk : mmc 0
mtd_blk : <none>
ubi_blk : <none>
usb_storage_blk : <none>
I would have expected the SPI NOR flash to appear in the "mtd_blk"
devices, and would expect the UBI volumes to appear in the "ubi_blk" list.
What am I missing?
What I'm aiming for here is to be able to:
- Read from squashfs in (raw) MTD partition (NOR flash is ideal for that)
- Read kernel/devicetree (fit) from UBI volume
- Read from squashfs inside UBI volume
I can read files from UBIFS (and boot into Linux using bootcmd_ubifs)
just fine, e.g.:
Zynq> ubifsmount ubi0:qspi-rootfs
Zynq> ls ubi 0
<DIR> 5200 Fri Mar 09 12:34:56 2018 bin
<DIR> 160 Fri Mar 09 12:34:56 2018 dev
<DIR> 4984 Fri Mar 09 12:34:56 2018 etc
...
--
Mike Looijmans
System Expert
TOPIC Embedded Products B.V.
Materiaalweg 4, 5681 RJ Best
The Netherlands
T: +31 (0) 499 33 69 69
E: mike.looijm...@topic.nl
W: www.topic.nl
