[PATCH] ipq40xx: limit available radio channels for GL.iNet GL-B2200

[Enrico Mioso]

Hi!!

Sory for me taking so long to answer, and provide the information.

I promise I'll do so at the end of the week; youcan find some bootlogs in the GitHub PR from where I started, but I'll provide fresh logs at the end of the week, since I will also need to test DS transition for this board.
In the meantime, you may have a look at:
https://github.com/openwrt/openwrt/issues/4691

Thanks for your help! :)

On Fri, 11 Feb 2022, Christian Lamparter wrote:

> Date: Fri, 11 Feb 2022 18:06:21
> From: Christian Lamparter <chunkeey at gmail.com>
> To: Enrico Mioso <mrkiko.rs at gmail.com>, openwrt-devel at lists.openwrt.org
> Subject: Re: [PATCH] ipq40xx: limit available radio channels for GL.iNet
>     GL-B2200
> 
> On 11/02/2022 10:46, Enrico Mioso wrote:
>> The PCIe and built-in 5GHZ radios are meant to operate on different
>> frequency bands. The hardware enforces this via RF filters.
>> Add this information to allow software enforcing it as well.
>> Credits to Piotr Dymacz for the invaluable help.
>> 
>> Signed-off-by: Enrico Mioso <mrkiko.rs at gmail.com>
>> ---
>> Also due to the nature of this patch, testing it might not be easy.
>> Still, applying it shoudn't cause issues, as the only uncertainty is 
>> whether we will need to stricter the limits. So I think this should go in.
>
> Somewhat related question: (though, it's about the board itself)
>
> Do you have the board? Can you tell me the pciid of the PCIe ath10k chip,
> or a bootlog?
>
> I'm asking because when I was converting it to nvmem
> (see commit cfc13c44595db591092859fc6adc71f1d8159c50),
> I noticed that the board-data-extraction used the
> WAVE-1 files. However GL.iNet says it's a WAVE-2 9886 chip.
>
> Thanks,
> Christian
>
>> ---
>>   .../ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-gl-b2200.dts   | 2 ++
>>   1 file changed, 2 insertions(+)
>> 
>> diff --git 
>> a/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-gl-b2200.dts 
>> b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-gl-b2200.dts
>> index 243dcb84d6..754af7c820 100644
>> --- 
>> a/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-gl-b2200.dts
>> +++ 
>> b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-gl-b2200.dts
>> @@ -367,6 +367,7 @@
>>   			nvmem-cell-names = "calibration";
>>   			nvmem-cells = <&cal_art_9000>;
>>   			qcom,ath10k-calibration-variant = "GL-B2200";
>> +			ieee80211-freq-limit = <5450000 5900000>;
>>   		};
>>   	};
>>   };
>> @@ -383,4 +384,5 @@
>>   	nvmem-cell-names = "pre-calibration";
>>   	nvmem-cells = <&precal_art_5000>;
>>   	qcom,ath10k-calibration-variant = "GL-B2200";
>> +	ieee80211-freq-limit = <5100000 5400000>;
>>   };
>
>