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Subject: Re: [PATCH] iw: add optional argument to parse 6G band channel
To:     Johannes Berg <johannes@sipsolutions.net>,
        Pradeep Kumar Chitrapu <pradeepc@codeaurora.org>
Cc:     linux-wireless@vger.kernel.org
References: <1602283770-8026-1-git-send-email-pradeepc@codeaurora.org>
 <5c39eaec897af4d7b1005d1f7cb80552c3404e54.camel@sipsolutions.net>
 <e0ba2a4d-3f82-22f6-e928-1ac25eb1448b@broadcom.com>
 <f25189bb18fe0d4e9a70f5468eab74b209b83054.camel@sipsolutions.net>
 <4bbc1e91-ba41-7e05-cb53-baa74232388d@broadcom.com>
 <02802f0fc1b3e4941ce137fcf6a637c32a756a4a.camel@sipsolutions.net>
From:   Arend Van Spriel <arend.vanspriel@broadcom.com>
Message-ID: <a1e8c34d-55f3-a6ae-1829-432e6853c898@broadcom.com>
Date:   Fri, 6 Nov 2020 10:19:45 +0100
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On 11/6/2020 10:12 AM, Johannes Berg wrote:
> On Fri, 2020-11-06 at 10:12 +0100, Arend Van Spriel wrote:
>> On 11/6/2020 10:06 AM, Johannes Berg wrote:
>>> On Fri, 2020-11-06 at 10:05 +0100, Arend Van Spriel wrote:
>>>> On 11/6/2020 9:55 AM, Johannes Berg wrote:
>>>>> On Fri, 2020-10-09 at 15:49 -0700, Pradeep Kumar Chitrapu wrote:
>>>>>> Channel numbers of 6G band overlaps with those of 2G or 5G bands.
>>>>>> Therefore, an optional argument "6G" is added and expected next
>>>>>> to channel number to map it to correct 6GHz frequency. If not
>>>>>> specified, defaults to matching 2G or 5G frequency.
>>>>>>
>>>>>> example:
>>>>>> iw wlanX set channel 149 6G 80MHz  --> maps to 6695 MHz
>>>>>> iw wlanX set channel 149 80MHz     --> maps to 5745 MHz
>>>>>
>>>>> Hm. I can't really say I like this much.
>>>>>
>>>>> Is it _really_ needed? I mean, we mostly specify the frequency today, so
>>>>> ... why not just always do that for 6 GHz?
>>>>
>>>> I suspect there are people preferring channel numbers as much as there
>>>> are people preferring frequencies. Personally, I think it is acceptable
>>>> to put this limitation on 6G.
>>>
>>> :)
>>>
>>> After I sent the message I figured maybe then we should have different
>>> syntax, where we say prefix the channel number by the band?
>>>
>>>    iw wlanX set channel 6:149 ...
>>>    iw wlanX set channel 5:149 ...
>>>    iw wlanX set channel 2.4:11 ...
>>
>> Do you want to make that band: prefix required or optional.
> 
> That's a good question. Probably should be optional, otherwise
> everything breaks ...

Right.

>> btw. starts
>> to look like the format we use with our wl utility ;-)
> 
> Hah! Maybe you have a better idea there? :)

Not really. The above format seems fine as is.

Gr. AvS

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