Asus PL-AC56 Powerline Range Extender Rev.A1
(in kit with Asus PL-E56P Powerline-slave)
Hardware specifications:
Board: AP152
SoC: QCA9563 2.4G n 3x3
PLC: QCA7500
WiFi: QCA9882 5G ac 2x2
Switch: QCA8337 3x1000M
Flash: 16MB 25L12835F SPI-NOR
DRAM SoC: 64MB w9751g6kb-25
DRAM PLC: 128MB w631gg6kb-15
Clocks: CPU:775.000MHz, DDR:650.000MHz, AHB:258.333MHz, Ref:25.000MHz
MAC addresses as verified by OEM firmware:
use address source
Lan/Wan/PLC *:10 art 0x1002 (label)
2G *:10 art 0x1000
5G *:14 art 0x5000
Important notes:
the PLC firmware has to be provided and copied manually onto the
device! The PLC here has no dedicated flash, thus the firmware file
has to be uploaded to the PLC controller at every system start
the PLC functionality is managed by the script /etc/init.d/plc_basic,
a very basic script based on the the one from Netadair (netadair dot de)
Installation:
Asus windows recovery tool:
have to have the latest Asus firmware flashed before continuing!
install the Asus firmware restoration utility
unplug the router, hold the reset button while powering it on
release when the power LED flashes slowly
specify a static IP on your computer:
IP address: 192.168.1.75
Subnet mask 255.255.255.0
start the Asus firmware restoration utility, specify the factory image
and press upload
do NOT power off the device after OpenWrt has booted until the LED flashing
TFTP Recovery method:
have to have the latest Asus firmware flashed before continuing!
set computer to a static ip, 192.168.1.75
connect computer to the LAN 1 port of the router
hold the reset button while powering on the router for a few seconds
send firmware image using a tftp client; i.e from linux:
$ tftp
tftp> binary
tftp> connect 192.168.1.1
tftp> put factory.bin
tftp> quit
do NOT power off the device after OpenWrt has booted until the LED flashing
Additional notes:
the pairing buttons have to have pressed for at least half a second,
it doesn't matter on which plc device (master or slave) first
it is possible to pair the devices without the button-pairing requirement
simply by pressing reset on the slave device. This will default to the
firmware settings, which is also how the plc_basic script is setting up
the master device, i.e. configuring it to firmware defaults
the PL-E56P slave PLC has its dedicated 4MByte SPI, thus it is capable
to store all firmware currently available. Note that some other
slave devices are not guarantied to have the capacity for the newer
~1MByte firmware blobs!
To have a good overlook about the slave device, here are its specs:
same QCA7500 PLC controller, same w631gg6kb-15 128MB RAM,
25L3233F 4MB SPI-NOR and an AR8035-A 1000M-Transceiver
Signed-off-by: Tamas Balogh <tamasbalogh@hotmail.com>
Add support for Methode euroDPU which is based on uDPU but does not
have a second SFP cage, instead of which a Maxlinear G.hn IC is used.
PHY mode is set to 1000Base-X despite Maxlinear IC being capable of
2500Base-X since until 5.15 support for mvebu is available trying to use
2500Base-X will cause buffer overruns for which the fix is not easily
backportable.
Installation instructions:
1. Boot the FIT initramfs image (openwrt-mvebu-cortexa53-methode_edpu-initramfs.itb)
2. sysupgrade using the openwrt-mvebu-cortexa53-methode_edpu-firmware.tgz
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
uDPU DTS has pending upstream fixups, so backport those as well as split
the DTS into a DTSI and DTS in preparation for euroDPU support which
uses uDPU as the base.
Ethernet aliases have not yet been sent upstream but will be soon in order
for U-boot to set the correct MAC on both ethernet interfaces instead of
just one.
Since U-boot environment now has its own partition, update the envtools
config script to search for it instead.
Patch hardcoding PHY mode is also not applicable anymore, so drop it and
set in the uDPU DTS directly.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
The MikroTik mAP-2nd (sold as mAP) is an indoor 2.4Ghz AP with
802.3af/at PoE input and passive PoE passthrough.
See https://mikrotik.com/product/RBmAP2nD for more details.
Specifications:
- SoC: QCA9533
- RAM: 64MB
- Storage: 16MB NOR
- Wireless: QCA9533 802.11b/g/n 2x2
- Ethernet: 2x 10/100 ports,
802.3af/at PoE in port 1, 500 mA passive PoE out on port 2
- 7 user-controllable LEDs
Note: the device is a tiny AP and does not distinguish between both
ethernet ports roles, so they are both assigned to lan.
With the current setup, ETH1 is connected to eth1 and ETH2 is connected
to eth0 via the embedded switch port 2.
Flashing:
TFTP boot initramfs image and then perform sysupgrade. The "ETH1" port
must be used to upload the TFTP image. Follow common MikroTik procedure
as in https://openwrt.org/toh/mikrotik/common.
Tested-By: Andrew Powers-Holmes <aholmes@omnom.net>
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
Linux MTD requires the parent partition be writable for a child
partition to be allowed write permission.
In order for soft_config to be writeable (and modifiable via sysfs),
the parent RouterBoot partition must be writeable
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
Linux MTD requires the parent partition be writable for a child
partition to be allowed write permission.
Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au>
Update this pending patch to remove the untested (variable eraseregions)
section, alongside simplifying the patch.
Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au>
[refresh and split out unrelated refreshes]
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
Since 4e0c54bc5b ("kernel: add support for kernel 5.4"),
the spi-nor limit 4k erasesize to spi-nor chips below a configured size
patch has not functioned as intended.
For uniform erasesize SPI-NOR devices, both
nor->erase_opcode & mtd->erasesize are used in erase operations.
These are set before, and not modified by, this
CONFIG_MTD_SPI_NOR_USE_4K_SECTORS_LIMIT patch.
Thus, an SPI-NOR device with CONFIG_MTD_SPI_NOR_USE_4K_SECTORS will
always use 4k erasesize (where the device supports it).
If this patch was fixed to function as intended, there would be
cases where devices change from a 4K to a 64K erasesize.
Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au>
Asus RP-AC87 ac2600 Repeater
2.4GHz 800Mbps
5GHz 1733Mbps
Hardware specifications:
SoC: MT7621A 2 cores 4 threads @880MHz
WiFi2G: MT7615E 2G 4x4 b/g/n
Wifi5G: MT7615E 5G 4x4 n/ac
DRAM: 128MB DDR3 @1200mhz
Flash: 16MB MX25L12805D SPI-NOR
LAN/WAN: MT7530 1x1000M
MAC addresses as verified by OEM firmware:
use address source
Lan/W5G *:B0 factory 0x8004 (label)
W2G *:B4 factory 0x0
Installation:
Asus windows recovery tool:
install the Asus firmware restoration utility
unplug the router, hold the reset button while powering it on
release when the power LED flashes slowly
specify a static IP on your computer:
IP address: 192.168.1.75
Subnet mask 255.255.255.0
Start the Asus firmware restoration utility, specify the factory image
and press upload
Do not power off the device after OpenWrt has booted until the LED flashing.
TFTP Recovery method:
set computer to a static ip, 192.168.1.2
connect computer to the LAN 1 port of the router
hold the reset button while powering on the router for a few seconds
send firmware image using a tftp client; i.e from linux:
$ tftp
tftp> binary
tftp> connect 192.168.1.1
tftp> put factory.bin
tftp> quit
Signed-off-by: Tamas Balogh <tamasbalogh@hotmail.com>
The random crashes observed with HARDENED_USERCOPY enabled no longer
seem to occur. Enable HARDENED_USERCOPY to improve security.
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
This patch provides support for the Firebox M300 only user-controllable
bi-color LED, and makes the green "shield" LED act as the typical
OpenWrt status led.
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
Kernel 5.15.49 introduced a new symbol 'LIB_MEMNEQ'. Add it to the
generic 5.15 config.
Fixes: f1cd144482 ("kernel: bump 5.15 to 5.15.49")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Kernel 5.10.124 introduced a new symbol 'LIB_MEMNEQ'. Add it to the
generic 5.10 config.
Fixes: 9e5d743422 ("kernel: bump 5.10 to 5.10.124")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
DGS-1210 switches support dual image, with each image composed of a
kernel and a rootfs partition. For image1, kernel and rootfs are in
sequence. The current OpenWrt image (written using a serial console),
uses those partitions together as the firmware partition, ignoring the
partition division. The current OEM u-boot fails to validate image1 but
it will only trigger firmware recovery if both image1 and image2 fail,
and it does not switch the boot image in case one of them fails the
check.
The OEM factory image is composed of concatenated blocks of data, each
one prefixed with a 0x40-byte cameo header. A normal OEM firmware will
have two of these blocks (kernel, rootfs). The OEM firmware only checks
the header before writing unconditionally the data (except the header)
to the correspoding partition.
The OpenWrt factory image mimics the OEM image by cutting the
kernel+rootfs firmware at the exact size of the OEM kernel partition
and packing it as "the kernel partition" and the rest of the kernel and
the rootfs as "the rootfs partition". It will only work if written to
image1 because image2 has a sysinfo partition between kernel2 and
rootfs2, cutting the kernel code in the middle.
Steps to install:
1) switch to image2 (containing an OEM image), using web or these CLI
commands:
- config firmware image_id 2 boot_up
- reboot
2) flash the factory_image1.bin to image1. OEM web (v6.30.016)
is crashing for any upload (ssh keys, firmware), even applying OEM
firmwares. These CLI commands can upload a new firmware to the other
image location (not used to boot):
- download firmware_fromTFTP <tftpserver> factory_image1.bin
- config firmware image_id 1 boot_up
- reboot
To debrick the device, you'll need serial access. If you want to
recover to an OpenWrt, you can replay the serial installation
instructions. For returning to the original firmware, press ESC during
the boot to trigger the emergency firmware recovery procedure. After
that, use D-Link Network Assistant v2.0.2.4 to flash a new firmware.
The device documentation does describe that holding RESET for 12s
trigger the firmware recovery. However, the latest shipped U-Boot
"2011.12.(2.1.5.67086)-Candidate1" from "Aug 24 2021 - 17:33:09" cannot
trigger that from a cold boot. In fact, any U-Boot procedure that relies
on the RESET button, like reset settings, will only work if started from
a running original firmware. That, in practice, cancels the benefit of
having two images and a firmware recovery procedure (if you are not
consider dual-booting OpenWrt).
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
This model is almost identical to the EAP225 v3.
Major difference is the RTL8211FS PHY Chipset.
Device specifications:
* SoC: QCA9563 @ 775MHz
* RAM: 128MiB DDR2
* Flash: 16MiB SPI-NOR
* Wireless 2.4GHz (SoC): b/g/n, 3x3
* Wireless 5Ghz (QCA9886): a/n/ac, 2x2 MU-MIMO
* Ethernet (RTL8211FS): 1× 1GbE, 802.3at PoE
Flashing instructions:
* ssh into target device and run `cliclientd stopcs`
* Upgrade with factory image via web interface
Debricking:
* Serial port can be soldered on PCB J4 (1: TXD, 2: RXD, 3: GND, 4: VCC)
* Bridge unpopulated resistors R225 (TXD) and R237 (RXD).
Do NOT bridge R230.
* Use 3.3V, 115200 baud, 8n1
* Interrupt bootloader by holding CTRL+B during boot
* tftp initramfs to flash via LuCI web interface
setenv ipaddr 192.168.1.1 # default, change as required
setenv serverip 192.168.1.10 # default, change as required
tftp 0x80800000 initramfs.bin
bootelf $fileaddr
MAC addresses:
MAC address (as on device label) is stored in device info partition at
an offset of 8 bytes. ath9k device has same address as ethernet, ath10k
uses address incremented by 1.
Signed-off-by: Sven Hauer <sven.hauer+github@uniku.de>
In Linux v5.14 an extra feature was introduced for the RTL8211F phy,
allowing to disable a clock output from the phy. Part of that patch is to
always (soft) reset the phy upon initialisation.
This phy reset is required to have a working ethernet on the TP-Link
EAP225-Outdoor v3 and EAP225 v4 after a reboot. Otherwise the ethernet
port will only function properly on cold boots.
Tested-by: Andre Klärner <kandre@ak-online.be> # EAP225-Outdoor v3
Tested-by: Sven Hauer <sven.hauer+github@uniku.de> # EAP225 v4
Signed-off-by: Sander Vanheule <sander@svanheule.net>
lantiq,bus-clock, interrupt-map-mask and interrupt-map are already
defined with these exact values in vr9.dtsi. Drop them from
vr9_tplink_tdw8980.dts to just have one place where these are
maintained.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Starting with GCC 12, we have the possibility of mitigating straight-line
speculation vulnerabilities in x86-64 targets. Make it so.
Reported-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
Setting up DSA bond silently fails if mode is not 802.3ad. Add log message
to fix it. As we are already here harmonize all logging messages in the
add/delete functions.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
The SFP cages 9F and 10F share the same SCL line. Currently, there
isn't a good way to model this. Thus, only one SFP port can be fully
supported.
Cage 10F is fully supported with an I2C bus and sfp handle. Linux
automatically handles enabling or disabling the TX laser.
Cage 9F is only parially supported, without the sfp handle. The SDA
line is hogged as an input, so that it remains high. SCL transitions
sould not affect modules connected to this cage. The default value of
the tx-disable line is high (active). It is exported as a gpio, but
the laser is off by default. To enable the laser:
echo 0 > /sys/class/gpio/sff-p9-tx-disable/value
Thus, both modules can be used for networking, but only 10F will be
able to detect and identify a plugged in SFP module.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Add support for the Engenius EWS2910P PoE switch. This is an RTL8380
based switch with two SFP slots, and PoE 802.3af one every RJ-45 port.
The specs say 802.3af, but the vendor firmware configures the PSE for
a budget of 31W, indicating 802.3at support.
Specifications:
---------------
* SoC: Realtek RTL8380M
* Flash: 32 MiB SPI flash Macronix MX25L25635E
* RAM: 256 MiB (As reported by bootloader)
* Ethernet: 16x 10/100/1000 Mbps with PoE
2x SFP slots
* Buttons: 1 "Reset" button on front panel
1 "LED mode: button on front panel
1 "On/Off" Toggle switch on the back
* Power: 48V-54V DC barrel jack
* UART: 1 serial header (JP1) with populated 2.54mm pitch header
Labeled GRTV for ground, rx, tx, and 3.3V respectively
* PoE: 1 STM ST32F100 microcontroller
2 BCM59111 PSE chips
Works:
------
- (8) RJ-45 ethernet ports
- Switch functions
- LEDs and buttons
Not yet enabled:
----------------
- SFP ports (will be enabled in a subsequent change)
- Power-over-Ethernet (requires realtek-poe package)
Install via web interface:
-------------------------
The factory firmware will accept and flash the initramfs image. It is
recommended to flash to "Partition 0". Flashing to "Partition 1" is
not supported at this point.
The factory web GUI will show the following warning:
" Warning: The firmware version is v0.00.00-c0.0.00
The firmware image you are uploading is older than the current
firmware of the switch. The device will reset back to default
settings. Are you sure you want to proceed?"
This is expected when flashing OpenWrt. After the initramfs image
boots, flash the -sysupgrade using either the commandline or LuCI.
Install via serial console/tftp:
--------------------------------
The u-boot firmware will not stop the boot, regardless of which key is
pressed. To access the u-boot console, ground out the CLK (pin 16) of
the ROM (U22) when u-boot is reading the linux image. If timed
correctly, the image CRC will fail, and u-boot will drop to a shell:
> rtk network on
> setenv ipaddr <address of tftp server>
> tftp $(freemem) <name-of-initramfs-image.bin>
> bootm
Then flash the -sysupgrade using either the commandline or luci.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
[gpio-led node names, OpenWrt and LuCI capitalization in commit message]
Signed-off-by: Sander Vanheule <sander@svanheule.net>
Asus RT-N12+ B1 and Asus RT-N300 B1 are the same device
with a different name.
The OEM firmwares have the same MD5 with Asus RT-N11P B1.
Same instructions for Asus RT-N11P B1 see:
commit c3dc52e39a ("ramips: add support for Asus RT-N10P V3 / RT-N11P B1 / RT-N12 VP B1")
Signed-off-by: Semih Baskan <strstgs@gmail.com>
(Added id from the PR review to commit message)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Specifications:
- Device: ASUS RT-AX53U
- SoC: MT7621AT
- Flash: 128MB
- RAM: 256MB
- Switch: 1 WAN, 3 LAN (10/100/1000 Mbps)
- WiFi: MT7905 2x2 2.4G + MT7975 2x2 5G
- Ports: USB 3.0
- LEDs: 1x POWER (blue, configurable)
3x LAN (blue, configurable)
1x WAN (blue, configurable)
1x USB (blue, not configurable)
1x 2.4G (blue, not configurable)
1x 5G (blue, not configurable)
Flash by U-Boot TFTP method:
- Configure your PC with IP 192.168.1.2
- Set up TFTP server and put the factory.bin image on your PC
- Connect serial port(rate:115200) and turn on AP, then interrupt "U-Boot Boot Menu" by hitting any key
Select "2. Upgrade firmware"
Press enter when show "Run firmware after upgrading? (Y/n):"
Select 0 for TFTP method
Input U-Boot's IP address: 192.168.1.1
Input TFTP server's IP address: 192.168.1.2
Input IP netmask: 255.255.255.0
Input file name: openwrt-ramips-mt7621-asus_rt-ax53u-squashfs-factory.bin
- Restart AP aftre see the log "Firmware upgrade completed!"
Signed-off-by: Chuncheng Chen <ccchen1984@gmail.com>
(replaced led label, added key-* prefix to buttons, added note about
BBT)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Tim Small reported:
| Viewing the 'Network' -> 'Switch' config page in LuCI:
|
| The LuCI LAN 1 port corresponds to the port physically
| labelled 2 at the rear of the device.
| [...]
|
| When a patch cord is attached to the port labelled 1 [...],
| the LED labelled 2 illuminates. [...]
=> Ports, LuCI and LEDs are reversed/don't match.
Reported-by: Tim Small
Fixes: #10111
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Restore CONFIG_I8K + CONFIG_INTEL_INT0002_VGPIO that got
removed when I refreshed the config. Each x86 target gets
its own CONFIG_CRYPTO_BLAKE2S + LIB settings as only the
x86_64 can use the accelerated x86 version.
Also remove two extra spaces that sneaked into geode's config.
Fixes: 539e60539a ("generic: enable CRYPTO_LIB_BLAKE2S[_X86|_ARM]")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Ubiquiti UniFi Security Gateway (USG) is largely identical to
the EdgeRouter Lite (ERLite-3) apart from a different board ID
and two dome leds.
Device data (from WikiDev):
CPU: Cavium Octeon Plus CN5020 @500MHz 2-cores
Ethernet: 3x Atheros AR8035-A GbE PHY's
Flash: On-board 4MB Flash
Storage: Internal 3.8GB USB Flash (Kingston ID) drive
w/ 1.5GB free for use occupies single internal USB port.
Serial: 1x RJ45 port on front panel. 115200, 8N1
Buttons: 1x Reset
Flash instructions are identical to EdgeRouter Lite.
Signed-off-by: Clemens Hopfer <openwrt@wireloss.net>
It was observed that `rootfs_data` was sometimes not correctly erased
after performing sysupgrade, resulting in previous settings to prevail.
Add call to `wrgg-pad-rootfs` in sysupgrade image recipe to ensure any
previous jffs2 will be wiped, consistent with DAP-2610 from the ipq40xx
target, which introduced the double-flashing procedure for these devices.
Signed-off-by: Sebastian Schaper <openwrt@sebastianschaper.net>
This is now built-in, enable so it won't propagate on target configs.
Link: https://lkml.org/lkml/2022/1/3/168
Fixes: 79e7a2552e ("kernel: bump 5.15 to 5.15.44")
Fixes: 0ca9367069 ("kernel: bump 5.10 to 5.10.119")
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
(Link to Kernel's commit taht made it built-in,
CRYPTO_LIB_BLAKE2S[_ARM|_X86] as it's selectable, 5.10 backport)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
The redboot-fis parser has option to specify the location of FIS
directory, use that, instead of patching the parser to scan for it, and
specifying location in kernel config.
Tested-by: Brian Gonyer <bgonyer@gmail.com>
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
This image is supposed to be written with help of bootloader to the
flash, but as it stands, it's not aligned to block size and RedBoot will
happily create non-aligned partition size in FIS directory. This could
lead to kernel to mark the partition as read-only, therefore pad the
image to block erase size boundary.
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
The bootloader on this board hid the partition containig MAC addresses
and prevented adding this space to FIS directory, therefore those had to
be stored in RedBoot configuration as aliases to be able to assigne them
to proper interfaces. Now that fixed partition size are used instead of
redboot-fis parser, the partition containig MAC addresses could be
specified, and with marking it as nvmem cell, we can assign them without
userspace involvement.
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Don't comence the switch to RAMFS when the image format is wrong. This
led to rebooting the device, which could lead to false impression that
upgrade succeded.
Being here, factor out the code responsible for upgrading RedBoot
devices to separate file.
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
After the kernel has switched version to 5.10, JA76PF2 and
RouterStations lost the capability to sysupgrade the OpenWrt version.
The cause is the lack of porting the patches responsible for partial
flash erase block writing and these boards FIS directory and RedBoot
config partitions share the same erase block. Because of that the FIS
directory can't be updated to accommodate kernel/rootfs partition size
changes. This could be remedied by bootloader update, but it is very
intrusive and could potentially lead to non-trivial recovery procedure,
if something went wrong. The less difficult option is to use OpenWrt
kernel loader, which will let us use static partition sizes and employ
mtd splitter to dynamically adjust kernel and rootfs partition sizes.
On sysupgrade from ath79 19.07 or 21.02 image, which still let to modify
FIS directory, the loader will be written to kernel partition, while the
kernel+rootfs to rootfs partition.
The caveats are:
* image format changes, no possible upgrade from ar71xx target images
* downgrade to any older OpenWrt version will require TFTP recovery or
usage of bootloader command line interface
To downgrade to 19.07 or 21.02, or to upgrade if one is already on
OpenWrt with kernel 5.10, for RouterStations use TFTP recovery
procedure. For JA76PF2 use instructions from this commit message:
commit 0cc87b3bac ("ath79: image: disable sysupgrade images for routerstations and ja76pf2"),
replacing kernel image with loader (loader.bin suffix) and rootfs
image with firmware (firmware.bin suffix).
Fixes: b10d604459 ("kernel: add linux 5.10 support")
Fixes: 15aa53d7ee ("ath79: switch to Kernel 5.10")
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
(mkubntimage was moved to generic-ubnt.mk)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
This SBC has Microchip TCN75 sensor, wich measures ambient temperature.
Specify it in dts to allow readout by applications using kernel hwmon
API.
Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>