The Puzzle devices come with an I2C-connected Epson RX8130 RTC.
Disable the (dysfunctional) RTC units of the SoC and add driver
kmod-rtc-ds1307 to support the Epson RX8130 instead.
Tested-by: Thomas Huehn <thomas.huehn@hs-nordhausen.de>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
The Synology DS213j is a rather dated dual-bay SATA NAS based on on the
Marvell Armada-370 SoC. It has long been supported in vanilla Linux,
however, flash partitioning there didn't match with reality (ie. the
bootloaders expectations) and nobody cared to wrap up OpenWrt support
for the device.
CPU: Marvell Armada-370 ARMv7 SoC @ 1200 MHz
RAM: 512 MB DDR3
Flash: 8 MB (Micron Technology N25Q064)
Network: 1x 1000M/100M/10M Ethernet (Marvell 88E1510)
SATA: 2x 3.0Gbps
USB: 2x USB 2.0
As OS options are becoming limited on that still quite useful hardware,
patch the flash partitions to be able to get the most out of it when
using OpenWrt.
The vendor firmware loads kernel and initrd from fixed addresses in
the flash, not making use of a modifyable environment stored in flash
which is stored at a location right in the middle of the vendor's
zImage partition (at 0x100000).
Stock firmware flash layout:
0x000000 ~ 0x0c0000 : "RedBoot" (actually U-Boot)
0x0c0000 ~ 0x390000 : "zImage"
0x390000 ~ 0x7d0000 : "rd.gz"
0x7d0000 ~ 0x7e0000 : "vendor" (contains MAC address, serial no)
0x7e0000 ~ 0x7f0000 : "RedBoot Config" (unused? legacy left-over)
0x7f0000 ~ 0x800000 : "FIS directory" (unused? legacy left-over)
OpenWrt flash layout:
0x000000 ~ 0x0c0000 : "u-boot"
0x0c0000 ~ 0x100000 : "gap"
0x100000 ~ 0x110000 : "u-boot-env"
0x110000 ~ 0x7d0000 : "kernel"
0x7d0000 ~ 0x7e0000 : "vendor" (contains MAC address, serial no)
0x7e0000 ~ 0x800000 : "gap2"
"kernel", "gap" and "gap2" are concatenated using the mtd-concat
virtual MTD driver, resulting in a partition "firmware" used by
OpenWrt for kernel, rootfs and rootfs-overlay, 0x720000 (7296kiB) in
total.
Installation:
1. Connect to internal serial console port and Ethernet port,
providing a TFTP server at a static IPv4 address, e.g.
192.168.1.254/24.
2. Interrupt bootloader using CTRL+C
3. Configure bootloader to load OpenWrt on future boot:
setenv bootcmd "bootm f4110000"
saveenv
4. Load and boot initramfs image via TFTP:
setenv ipaddr 192.168.1.1
setenv serverip 192.168.1.254
tftpboot openwrt-mvebu-cortexa9-synology_ds213j-initramfs-kernel.bin
bootm
5. Use sysupgrade to load final image.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Since kernel 5.11, the PXA I2C driver has been converted to generic I2C
recovery, which makes the I2C bus completely lock up if recovery pinctrl
is present in the DT and I2C recovery is enabled.
This effectively completely broke I2C on Methode uDPU and eDPU boards
as both of them rely on I2C recovery.
After a discussion upstream, it was concluded that there is no simple fix
and that the blamed upstream commit:
0b01392c18b9993a584f36ace1d61118772ad0ca ("i2c: pxa: move to generic GPIO
recovery") should be reverted.
I have sent the revert upstream, it should be merged soon so lets "fix"
OpenWrt as well.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Internet Initiative Japan Inc. (IIJ) SA-W2 is a network appliance with
11ac (Wi-Fi 5) wlan, based on 88F6810.
Specification:
- SoC : Marvell Armada 380 88F6810
- RAM : DDR3 256 MiB (Micron MT41K64M16TW-107:J x2)
- Flash : SPI-NOR 32 MiB (Winbond W25Q256JVFIQ)
- WLAN : 2.4/5 GHz, Mini PCI-E
- 2.4 GHz : Silex SX-PCEGN (Atheros AR9287 (2T2R))
- 5 GHz : Silex SX-PCEAC (Qualcomm Atheros QCA9880 (3T3R))
- Ethernet : 10/100/1000 Mbps x5
- Switch : Marvell 88E6172
- LEDs/Keys : 12x/1x
- UART : "CONSOLE" port (RJ-45, RS-232C)
- settings : 115200n8
- assignment: 1:NC, 2:NC, 3:TXD, 4:GND,
5:GND, 6:RXD, 7:NC, 8:NC
- note : compatible with Cisco console cable
- Power : DC Input or PoE
- DC Input : 12 VDC, 3 A
- PoE : 802.3af
- module : Silvertel Ag9712-2BR
- note : USB ports shouldn't be used when powered by PoE
- Bootloader : PMON2000 based
- Stock : NetBSD based
Flash instruction using sysupgrade image:
1. Prepare TFTP server with IP address 192.168.0.10 and put sysupgrade
image to TFTP directory
2. Connect PC to "GE0/PoE" port on SA-W2
3. Power on SA-W2, interrupt count-down by Esc and enter to bootloader
CLI
4. Set IP address of the device
address 192.168.0.1
5. Download sysupgrade image and flash to storage
tftpload 192.168.0.10 <image name>
firmwrite
example:
#tftpload 192.168.0.10 openwrt-mvebu-cortexa9-iij_sa-w2-squashfs-sysupgrade.bin
Loading openwrt-mvebu-cortexa9-iij_sa-w2-squashfs-sysupgrade.bin
loaded 8127268 byte(s)
#firmwrite
Erasing FLASH block 32 Done 0x00200000.
Erasing FLASH block 33 Done 0x00210000.
...
Erasing FLASH block 155 Done 0x009b0000.
Erasing FLASH block 156 Done 0x009c0000.
Programming FLASH. Done.
Verifying FLASH. No Errors found.
6. Check the flashed firmware
firmcheck
example:
#firmcheck
[Normal firmware]
ident: 'SEIL2015'
copyright: 'ARM OpenWrt Linux-5.15.93'
version format: 1
version major: 9
version minor: 99
version release: 'r22060+36-5163bb5e54'
body size: 3578524
checksum: 0x8a083cb8
[Rescue firmware]
ident: 'SEIL2015'
copyright: 'Copyright (c) 2017 Internet Initiative Japan Inc. All rights reserved.'
version format: 1
version major: 3
version minor: 70
version release: 'Release'
body size: 10152458
checksum: 0x8f9518c2
7. Boot with the flashed firmware
boot
Note:
- The bootloader on this device is not U-Boot and it's environment space
("bootloader-env") has no compatibility with U-Boot tools.
- eth1 is connected to port6 of 88E6172 switch, but multi-cpu port can't
be handled on Linux Kernel and not defined.
- Powering by PoE hasn't been tested yet.
- This device has 2x OS images on flash and they can be switched by
setting "BOOTDEV" variable on bootloader CLI.
That variable supports the following values:
- "flash" : primary image on flash ("firmware")
- "rescue": secondary image on flash ("rescue")
- "usb" : usb storage (broken?)
- "lan0/1": network
command to set:
set BOOTDEV=<dev>
example:
set BOOTDEV=rescue
This commit also supports booting from secondary partition.
- To execute initramfs image on bootloader CLI, use "go" command.
("go" command is not listed on the output of "help", but available)
example (download and execute):
address 192.168.0.1
tftpload 192.168.0.10 openwrt-mvebu-cortexa9-iij_sa-w2-initramfs-kernel.bin
go
MAC addresses:
LAN : 00:E0:4D:xx:xx:19 (none)
WAN : 00:E0:4D:xx:xx:18 (board_info, 0x6 (hex))
2.4 GHz: 84:25:3F:xx:xx:xx (Mini PCI-E card)
5 GHz : 84:25:3F:xx:xx:xx (Mini PCI-E card)
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Fortinet FortiGate 30E (FG-30E) is a UTM, based on Armada 385 (88F6820).
Specification:
- SoC : Marvell Armada 385 88F6820
- RAM : DDR3 1 GiB (4x Micron MT41K256M8DA-125, "D9PSH")
- Flash : SPI-NOR 128 MiB (Macronix MX66L1G45GMI-10G)
- Ethernet : 5x 10/100/1000 Mbps
- Switch : Marvell 88E6176
- LEDs/Keys : 16x/1x
- UART : "CONSOLE" port (RJ-45, RS-232C level)
- port : ttyS0
- settings : 9600bps 8n1
- assignment : 1:NC , 2:NC , 3:TXD, 4:GND,
5:GND, 6:RXD, 7:NC , 8:NC
- note : compatible with Cisco console cable
- HW Monitoring: nuvoTon NCT7802Y
- Power : 12 VDC, 2 A
- plug : Modex 5557-02R
Flash instruction using initramfs image:
1. Power on FG-30E and interrupt to show bootmenu
2. Call "[I]: System information." -> "[S]: Set serial port baudrate."
and set baudrate to 9600 bps
3. Call "[R]: Review TFTP parameters.", check TFTP parameters and
connect computer to "Image download port" in the parameters
4. Prepare TFTP server with the parameters obtained above
5. Rename OpenWrt initramfs image to "image.out" and put to TFTP
directory
6. Call "[T]: Initiate TFTP firmware transfer." to download initramfs
image from TFTP server
7. Type "r" key when the following message is showed, to boot initramfs
image without flashing to spi-nor flash
"Save as Default firmware/Backup firmware/Run image without saving:[D/B/R]?"
8. On initramfs image, backup mtd if needed
minimum:
- "firmware-info"
- "kernel"
- "rootfs"
9. On initramfs image, upload sysupgrade image to the device and perform
sysupgrade
10. Wait ~200 seconds to complete flashing and rebooting.
If the device is booted with stock firmware, login to bootmenu and
call "[B]: Boot with backup firmware and set as default." to set the
first OS image as default and boot it.
Notes:
- Both colors of Bi-color LEDs on the front panel cannot be turned on at
the same time.
- "PWR" and "Logo" LEDs are connected to power source directly.
- The following partitions are added for OpenWrt.
These partitions are contained in "uboot" partition (0x0-0x1fffff) on
stock firmware.
- "firmware-info"
- "dtb"
- "u-boot-env"
- "board-info"
Image header for bootmenu tftp:
0x0 - 0xf : ?
0x10 - 0x2f : Image Name
0x30 - 0x17f: ?
0x180 - 0x183: Kernel Offset*
0x184 - 0x187: Kernel Length*
0x188 - 0x18b: RootFS Offset (ext2)*
0x18c - 0x18f: RootFS Length (ext2)*
0x190 - 0x193: DTB Offset
0x194 - 0x197: DTB Length
0x198 - 0x19b: Data Offset (jffs2)
0x19c - 0x19f: Data Length (jffs2)
0x1a0 - 0x1ff: ?
*: required for initramfs image
MAC addresses:
(eth0): 70:4C:A5:xx:xx:CE (board-info, 0xd880 (hex))
WAN : 70:4C:A5:xx:xx:CF
LAN 1 : 70:4C:A5:xx:xx:D0
LAN 2 : 70:4C:A5:xx:xx:D1
LAN 3 : 70:4C:A5:xx:xx:D2
LAN 4 : 70:4C:A5:xx:xx:D3
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
This backports patches
leds: turris-omnia: convert to use dev_groups
leds: turris-omnia: Use sysfs_emit() instead of sprintf()
leds: turris-omnia: Drop unnecessary mutex locking
leds: turris-omnia: Do not use SMBUS calls
leds: turris-omnia: Make set_brightness() more efficient
leds: turris-omnia: Support HW controlled mode via private trigger
leds: turris-omnia: Add support for enabling/disabling HW gamma correction
leds: turris-omnia: Fix brightness setting and trigger activating
into backport-5.15.
The above patches replace:
leds: turris-omnia: support HW controlled mode via private trigger
leds: turris-omnia: initialize multi-intensity to full
leds: turris-omnia: change max brightness from 255 to 1
from mvebu/patches-5.15.
Signed-off-by: Marek Behún <kabel@kernel.org>
This backports patches
leds: turris-omnia: Use sysfs_emit() instead of sprintf()
leds: turris-omnia: Drop unnecessary mutex locking
leds: turris-omnia: Do not use SMBUS calls
leds: turris-omnia: Make set_brightness() more efficient
leds: turris-omnia: Support HW controlled mode via private trigger
leds: turris-omnia: Add support for enabling/disabling HW gamma correction
leds: turris-omnia: Fix brightness setting and trigger activating
into backport-6.1.
The above patches replace:
leds: turris-omnia: support HW controlled mode via private trigger
leds: turris-omnia: initialize multi-intensity to full
leds: turris-omnia: change max brightness from 255 to 1
from mvebu/patches-6.1.
Signed-off-by: Marek Mojík <marek.mojik@nic.cz>
New revision of eDPU uses an Marvell MV88E6361 switch to connect the SFP
cage and G.hn IC instead of connecting them directly to the ethernet
controllers.
The same image can be used on both versions as U-Boot will enable the
switch node and disable the unused ethernet controller.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Since kernel 5.13 this is needed to enable USB ports on all devices in
subtarget. Previously TF-A and COMPHY driver might have set up this PHY,
but not anymore.
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Tested-by: Robert Marko <robimarko@gmail.com>
This should be a part of kernel major bump. Fortunately it didn't stall
compilation, so no fixes tag.
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
This has been a part of modified upstream patch but got lost on major
kernel bump to 5.15, so bring it back.
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
[Add patch for kernel 6.1 too]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
With an initial set of patches and configs in place let's start testing
with kernel 6.1.
Run-tested on the cortexa9 subtarget (WRT1900ACS, Turris Omnia)
Tested-by: Etienne Champetier <champetier.etienne@gmail.com>
Signed-off-by: Stefan Kalscheuer <stefan@stklcode.de>
Backport Russell King's series [1]
net: mvneta: reduce size of TSO header allocation
to pending-5.15 to fix random crashes on Turris Omnia.
This also backports two patches that are dependencies to this series:
net: mvneta: Delete unused variable
net: mvneta: fix potential double-frees in mvneta_txq_sw_deinit()
[1] https://lore.kernel.org/netdev/ZCsbJ4nG+So%2Fn9qY@shell.armlinux.org.uk/
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> (squashed)
The omnia-medkit (only useful for installation with U-Boot
2015.10-rc2) is not being built anymore.
Now we can be reasonably sure, that there won't be first-time OpenWrt
boots with that U-Boot version, and can get rid of a rather ugly hack.
Signed-off-by: Klaus Kudielka <klaus.kudielka@gmail.com>
Since August 2022, users of very old Turris Omnias have been
encouraged to update U-Boot before OpenWrt installation [1].
The omnia-medkit (only useful for installation with
U-Boot 2015.10-rc2) is not needed anymore.
[1] https://openwrt.org/toh/turris/turris_omnia#installation
Signed-off-by: Klaus Kudielka <klaus.kudielka@gmail.com>
Use <mdio>:<addr>:<speed> trigger instead of netdev(link) trigger for
Fortinet FortiGate 50E, to indicate link speed on the each phys.
1000 Mbps: Green
100 Mbps : Amber
10 Mbps : (turn off)
Fixes: 102dc5a625 ("mvebu: add support for Fortinet FortiGate 50E")
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
To use <mdio>:<addr>:<speed> trigger for LEDs, enable PHY LED trigger
(CONFIG_LED_TRIGGER_PHY).
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
All targets are bumped to 5.15. Remove the old 5.10 patches, configs
and files using:
find target/linux -iname '*-5.10' -exec rm -r {} \;
Further, remove the 5.10 include.
Signed-off-by: Nick Hainke <vincent@systemli.org>
Avoid MCU getting "command reply receive timed out" message when LED
configuration setting trigger function is enabled in heartbeat mode.
Signed-off-by: Ian Chang <ianchang@ieiworld.com>
It appears that the refactor of the upgrade process for NAND devices resulted in the nand_do_upgrade_success step not being called for
devices using the linksys.sh script. As a result, configuration was
not preserved over sysupgrade steps.
This restores the preservation of configs for mvebu/cortexa9 devices using the
linksys.sh script.
Fixes: e25e6d8e54 ("base-files: fix and clean up nand sysupgrade code")
Signed-off-by: Michael Trinidad <trinidude4@hotmail.com>
Fortinet FortiGate 50E (FG-50E) is a UTM, based on Armada 385 (88F6820).
Specification:
- SoC : Marvell Armada 385 88F6820
- RAM : DDR3 2 GiB (4x Micron MT41K512M8DA-107, "D9SGQ")
- Flash : SPI-NOR 128 MiB (Macronix MX66L1G45GMI-10G)
- Ethernet : 7x 10/100/1000 Mbps
- LAN 1-5 : Marvell 88E6176
- WAN 1, 2 : Marvell 88E1512 (2x)
- LEDs/Keys : 18x/1x
- UART : "CONSOLE" port (RJ-45, RS-232C level)
- port : ttyS0
- settings : 9600bps 8n1
- assignment : 1:NC , 2:NC , 3:TXD, 4:GND,
5:GND, 6:RXD, 7:NC , 8:NC
- note : compatible with Cisco console cable
- HW Monitoring: nuvoTon NCT7802Y
- Power : 12 VDC, 2 A
- plug : Molex 5557-02R
Flash instruction using initramfs image:
1. Power on FG-50E and interrupt to show bootmenu
2. Call "[R]: Review TFTP parameters.", check TFTP parameters and
connect computer to "Image download port" in the parameters
3. Prepare TFTP server with the parameters obtained above
4. Rename OpenWrt initramfs image to "image.out" and put to TFTP
directory
5. Call "[T]: Initiate TFTP firmware transfer." to download initramfs
image from TFTP server
6. Type "r" key when the following message is showed, to boot initramfs
image without flashing to spi-nor flash
"Save as Default firmware/Backup firmware/Run image without saving:[D/B/R]?"
7. On initramfs image, backup mtd if needed
minimum:
- "firmware-info"
- "kernel"
- "rootfs"
7. On initramfs image, upload sysupgrade image to the device and perform
sysupgrade
8. Wait ~200 seconds to complete flashing and rebooting.
If the device is booted with stock firmware, login to bootmenu and
call "[B]: Boot with backup firmware and set as default." to set the
first OS image as default and boot it.
Notes:
- All "SPEED" LEDs(Green/Amber) of LAN and 1000M "SPEED" LEDs(Green) of
WAN1/2 are connected to GPIO expander. There is no way to indicate
link speed of networking device on Linux Kernel/OpenWrt, so those LEDs
cannot be handled like stock firmware.
On OpenWrt, use netdev(link) trigger instead.
- Both colors of Bi-color LEDs on the front panel cannot be turned on at
the same time.
- "PWR" and "Logo" LEDs are connected to power source directly.
- The following partitions are added for OpenWrt.
These partitions are contained in "uboot" partition (0x0-0x1fffff) on
stock firmware.
- "firmware-info"
- "dtb"
- "u-boot-env"
- "board-info"
Image header for bootmenu tftp:
0x0 - 0xf : ?
0x10 - 0x2f : Image Name
0x30 - 0x17f: ?
0x180 - 0x183: Kernel Offset*
0x184 - 0x187: Kernel Length*
0x188 - 0x18b: RootFS Offset (ext2)*
0x18c - 0x18f: RootFS Length (ext2)*
0x190 - 0x193: DTB Offset
0x194 - 0x197: DTB Length
0x198 - 0x19b: Data Offset (jffs2)
0x19c - 0x19f: Data Length (jffs2)
0x1a0 - 0x1ff: ?
*: required for initramfs image
MAC addresses:
(eth0): 70:4C:A5:xx:xx:7C (board-info, 0xd880 (hex))
WAN 1 : 70:4C:A5:xx:xx:7D
WAN 2 : 70:4C:A5:xx:xx:7E
LAN 1 : 70:4C:A5:xx:xx:7F
LAN 2 : 70:4C:A5:xx:xx:80
LAN 3 : 70:4C:A5:xx:xx:81
LAN 4 : 70:4C:A5:xx:xx:82
LAN 5 : 70:4C:A5:xx:xx:83
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
The Buffalo LinkStation LS220DE is a dual bay NAS, based on Marvell
Armada 370
Hardware:
SoC: Marvell Armada 88F6707
CPU: Cortex-A9 800 MHz, 1 core
Flash 1: SPI-NOR 1 MiB (U-Boot)
Flash 2: NAND 512 MiB (OS)
RAM: DDR3 256 MiB
Ethernet: 1x 1GbE
USB: 1x 2.0
SATA: 2x 3Gb/s
LEDs/Input: 5x / 2x (1x button, 1x slide-switch)
Fan: 1x casing
Flash instructions, from hard drive:
1. Get access to the "boot" partition at the hard drive where the stock
firmware is installed. It can be done with acp-commander or by
plugging the hard drive to a computer.
2. Backup the stock uImage:
mv /boot/uImage.buffalo /boot/uImage.buffalo.bak
3. Move and rename the Openwrt initramfs image to the boot partition:
mv openwrt-initramfs-kernel.bin /boot/uImage.buffalo
4. Power on the Linkstation with the hardrive inside. Now Openwrt will
boot, but still not installed.
5. Connect via ssh to OpenWrt:
ssh root@192.168.1.1
6. Rename boot files inside boot partition
mount -t ext3 /dev/sda1 /mnt
mv /mnt/uImage.buffalo /mnt/uImage.buffalo.openwrt.bak
mv /mnt/initrd.buffalo /mnt/initrd.buffalo.bak
7. Format ubi partitions at the NAND flash ("kernel_ubi" and "ubi"):
ubiformat /dev/mtd0 -y
ubidetach -p /dev/mtd1
ubiformat /dev/mtd1 -y
8. Flash the sysupgrade image:
sysupgrade -n openwrt-squashfs-sysupgrade.bin
9. Wait until it finish, the device will reboot with OpenWrt installed
on the NAND flash.
Restore the stock firmware:
1. Take the hard drive used for the installation and restore boot backup
files to their original names:
mount -t ext3 /dev/sda1 /mnt
mv /mnt/uImage.buffalo.bak /mnt/uImage.buffalo
mv /mnt/initrd.buffalo.bak /mnt/initrd.buffalo
2. Boot from the hard drive and perform a stock firmware update using
the Buffalo utility. The NAND will be restored to the original
state.
Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
Assign fan with 4 active cooling levels to be used for the main CPU as
well as external SerDes units.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Several fixes for the Puzzle WT61P803 hwmon driver were needed to make
it behave well as thermal cooling device:
- wire-up cooling device with OF node in device tree
- properly parse cooling-levels (u32 with range check vs. u8)
- actually use cooling-levels
- keep current state and only write to uC if state has changed
(avoids flooding the uC with commands which will result in uC crashing)
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Armada 7040 uses a rather small 15MB memory window for every PCI adapter,
however this is not sufficient for Qualcomm QCA6390 802.11ax cards that
are shipped along with the OpenWrt WLAN model of MOCHAbin as ath11k
requires at least 16MB of memory.
So, similar to what MACCHIATOBin has been doing for years, lets move
to using the second PCIe 2 memory window and expand it to 128MB to
make it future proof.
This has been already sent upstream [1].
[1] https://lore.kernel.org/linux-arm-kernel/20230219121418.1395401-1-robert.marko@sartura.hr/
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Starting from Linux Kernel version 6.3 UBI devices will no longer be
considered virtual, but rather have an MTD device parent. Hence they
will no longer be listed under /sys/devices/virtual/ubi which is
used in multiple places in OpenWrt. Prepare for future kernels by
using /sys/class/ubi instead of /sys/devuces/virtual/ubi.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
shellcheck warns against it with SC2086. It also hides a bug that
shellcheck marks with SC2015. Fixed those with explicit if/else.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
