[OpenWrt-Devel] Porting OpenWRT to a MediaTek MT7688

John Crispin blogic at openwrt.org
Thu Jun 4 12:37:20 EDT 2015


there is no wifi support fro mt7688 yet. please post your other patches


On 04/06/2015 18:06, Thomas David Paynter wrote:
> Hello All,
> This is my first post to the list so please let me know if I'm not
> following list etiquette.
> I'm currently working on porting OpenWRT to a MediaTek MT7688, this is
> essentially the same thing as the MT7628 so there is already reasonable
> support for this. I have managed to get OpenWRT up and running with
> minimal changes, and most stuff seems to be working fine. But I am stuck
> on the WiFi driver.
> I have selected the various combinations of:
> kmod-rt2x....
> options in the Kernel modules->Wireless Drivers menu.
> And as expected compat-wireless has appeared in my build directory and
> is being build.
> Also when the kernel boots I now see a block of cfg80211: .... messages.
> I have added the following entry to my device tree as this is what
> worked for the rt5350 when I was working on this:
>   wmac at 10180000 {
>     compatible = "ralink,rt2880-wmac";
>     reg = <0x10180000 40000>;
>     interrupt-parent = <&cpuintc>;
>     interrupts = <6>;
>     ralink,eeprom = "soc_wmac.eeprom";
>   };
> The compatible string matches the one in rt2x00soc.c
> I then added printk statements to all of the init and probe methods in
> following compat-wireless files:
> openwrt/build_dir/target-mipsel_24kec+dsp_uClibc-
> openwrt/build_dir/target-mipsel_24kec+dsp_uClibc-
> openwrt/build_dir/target-mipsel_24kec+dsp_uClibc-
> openwrt/build_dir/target-mipsel_24kec+dsp_uClibc-
> I was expecting to see these get called as the kernel tried to setup the
> wireless, but none of them seem to get called.
> Is there a step that I'm missing?
> What are the basic steps that take place when the kernel is trying to
> find wireless drivers?
> I'm not certain that these drivers will work for this SoC but if I can
> get to a stage where I can see it failing I should be able to adapt one
> of them to work.
> I'm quite new to Linux wireless drivers, so I was hoping that someone
> would be able to point me in the right direction.
> Thanks for your time,
> Tom
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