As of upstream Linux commit 0fe1e96fef0a ("powerpc/pci: Prefer PCI
domain assignment via DT 'linux,pci-domain' and alias"), the PCIe
domain address is no longer numbered by the lowest 16 bits of the PCI
register address after a fallthrough. Instead of the fallthrough, the
enumeration process accepts the alias ID (as determined by
`of_alias_scan()`). This causes e.g.:
9000:00:00.0 PCI bridge: Freescale Semiconductor Inc P1020E (rev 11)
9000:01:00.0 Network controller: Qualcomm Atheros AR958x 802.11abgn ...
to become
0000:00:00.0 PCI bridge: Freescale Semiconductor Inc P1020E (rev 11)
0000:01:00.0 Network controller: Qualcomm Atheros AR958x 802.11abgn ...
... which then causes the sysfs path of the netdev to change,
invalidating the `wifi_device.path`s enumerated in
`/etc/config/wireless`.
One other solution might be to migrate the uci configuration, as was
done for mvebu in commit 0bd5aa89fcf2 ("mvebu: Migrate uci config to
new PCIe path"). However, there are concerns that the sysfs path will
change once again once some upstream patches[^2][^3] are merged and
backported (and `CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT` is enabled).
Instead, remove the aliases and allow the fallthrough to continue for
now. We will provide a migration in a later release.
This was first reported as a Github issue[^1].
[^1]: https://github.com/openwrt/openwrt/issues/10530
[^2]: https://lore.kernel.org/linuxppc-dev/20220706104308.5390-1-pali@kernel.org/t/#u
[^3]: https://lore.kernel.org/linuxppc-dev/20220706101043.4867-1-pali@kernel.org/Fixes: #10530
Tested-by: Martin Kennedy <hurricos@gmail.com>
[Tested on the Aerohive HiveAP 330 and Extreme Networks WS-AP3825i]
Signed-off-by: Martin Kennedy <hurricos@gmail.com>
(cherry picked from commit 7f4b4c29f3489697dca7495216460d0ed5023e02)
include the device-tree binding headers that provide definitions
for keys codes and gpios in the device-tree files.
Random bonus: merge tl-wdr4900-v1's uboot with the nvmem-node.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Hardware
--------
SoC: NXP P1020 (2x e500 @ 800MHz)
RAM: 256M DDR3 (Micron)
FLASH: 32M NOR (Spansion S29GL128S)
BTN: 1x Reset
WiFi: 1x Atheros AR9590 2.4 bgn 3x3
2x Atheros AR9590 5.0 an 3x3
ETH: 1x Gigabit Ethernet (Atheros AR8033)
LED: System (green/red) - Radio{0,1} (green)
LAN (connected to PHY)
- GE blue
- FE green
Serial is a Cisco-compatible RJ45 next to the ethernet port.
115200-N-8 are the settings for OS and U-Boot.
Installation
------------
1. Grab the OpenWrt initramfs, rename it to 01C8A8C0.img. Place it in
the root directory of a TFTP server and serve it at
192.168.200.200/24.
2. Connect to the serial port and boot the AP. Stop autoboot in U-Boot
by pressing Enter when prompted. Credentials are identical to the one
in the APs interface. By default it is admin / new2day.
3. Set the bootcmd so the AP can boot OpenWrt by executing
$ setenv boot_openwrt "setenv bootargs;
cp.b 0xee000000 0x1000000 0x1000000; bootm 0x1000000"
$ setenv bootcmd "run boot_openwrt"
$ saveenv
If you plan on going back to the vendor firmware - the bootcmd for it
is stored in the boot_flash variable.
4. Load the initramfs image to RAM and boot by executing
$ tftpboot 0x1000000 192.168.200.200:01C8A8C0.img; bootm
5. Make a backup of the "firmware" partition if you ever wish to go back
to the vendor firmware.
6. Upload the OpenWrt sysupgrade image via SCP to the devices /tmp
folder.
7. Flash OpenWrt using sysupgrade.
$ sysupgrade -n /tmp/openwrt-sysupgrade.bin
Signed-off-by: David Bauer <mail@david-bauer.net>
