[PATCH 4/9] cfg80211: add definition for 6G power spectral density(psd)

[Wen Gong]

On 2021-07-23 17:24, Johannes Berg wrote:
> On Mon, 2021-05-17 at 16:19 -0400, Wen Gong wrote:
>> 
>> + * @IEEE80211_CHAN_PSD: power spectral density (in dBm)
>> + *	on this channel.
> 
> Do we need that? Which really is just another way of asking
> 
>> + * @psd: power spectral density (in dBm)
> 
> whether or not 0 is a valid value for this?
yes, 0 is also a valid value.
It also have negative, such as -1dBm.
> 
>> +++ b/include/uapi/linux/nl80211.h
>> @@ -4040,6 +4040,7 @@ enum nl80211_sched_scan_match_attr {
>>   * @NL80211_RRF_NO_80MHZ: 80MHz operation not allowed
>>   * @NL80211_RRF_NO_160MHZ: 160MHz operation not allowed
>>   * @NL80211_RRF_NO_HE: HE operation not allowed
>> + * @NL80211_RRF_PSD: channels has power spectral density value
> 
> It doesn't seem like we need this, after all, there must be some kind 
> of
> attribute for the PSD, and then its presence/absence already indicates
> this?
Now the psd value 0 is also a valid value, so now we can not consider 
the
psd 0 as NON-PSD, so we need this flag to check it is psd or NON-psd.
> 
> johannes