[OpenWrt-Devel] [PATCH] lantiq: add support for ARV7506PW11 (Alice/O2 IAD 4421)

Mathias Kresin dev at kresin.me
Thu May 19 12:19:35 EDT 2016

2016-05-18 23:00 GMT+02:00 Oswald Buddenhagen <oswald.buddenhagen at gmx.de>:
> On Wed, May 18, 2016 at 01:19:59PM +0200, Mathias Kresin wrote:
>> But I need to identify the boot_sel pins first. I have looked at it
>> only briefly and was only able to identify one of the boot_sel pins:
>> R77. Unfortunately this pin alone doesn't switch the SoC to UART mode.
>> Did you found already the other pins?
> no, i didn't bother with analyzing the hardware beyond soft-probing the
> gpios to find some led and button pins. the dts is a copy&paste job from
> the wiki (which in turn is "derived" from another dts), with a lot of
> studying and trial and error to get the bogus parts out of it, and some
> polishing and adjustments to recent changes.

I found the pins to enter UART boot mode. Apply 3,3V to the right side
of R65 and GND to the right side of R80. R80 is partially hidden under
the heatsink of the SoC.

> i'll do that if you don't beat me to it (which you can easily do if you
> plan to seriously work on this - beyond email, this is a limited weekend
> project for me).

From zero to working image in just a weekend. That is indeed amazing.

> i think i also know why rfkill doesn't work: i forgot to change the
> keycode when i decided to switch the key's usage from wps to rfkill.
> (facepalm)

That's something where I've a lack of knowledge. Where does the
keycodes come from?

In the meantime I've added support for this board to u-boot, switched
from brnboot to uImage and to a custom partitions layout with a
firmware partition of 8128 KByte. Means, your image shrinking patches
aren't required any more.

I've pushed all my patches to my github repro:
https://github.com/mkresin/lede. All outlined ways to install u-boot
in https://wiki.openwrt.org/toh/arcadyan/vgv7510kw22#booting_via_uart
should work for this device as well.

Neither the u-boot nor the partition layout should considered as final
versions. I've noticed that danube u-boots are tripple the size as
they were with OpenWrt 12.09. I need to check this first.

I haven't had a closer look to the OpenWrt image, but what I've
noticed so far, is a not lit up WLAN led when the wireless is enabled.
Does it work for you?

Do you plan to work further on this patch or do you consider your
weekend project as finished.

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