The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/net/wireless/ieee80211.txt

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    1 Common IEEE 802.11 properties
    2 
    3 This provides documentation of common properties that are valid for all wireless
    4 devices.
    5 
    6 Optional properties:
    7  - ieee80211-freq-limit : list of supported frequency ranges in KHz. This can be
    8         used for devices that in a given config support less channels than
    9         normally. It may happen chipset supports a wide wireless band but it is
   10         limited to some part of it due to used antennas or power amplifier.
   11         An example case for this can be tri-band wireless router with two
   12         identical chipsets used for two different 5 GHz subbands. Using them
   13         incorrectly could not work or decrease performance noticeably.
   14 
   15 Example:
   16 
   17 pcie@0,0 {
   18         reg = <0x0000 0 0 0 0>;
   19         wifi@0,0 {
   20                 reg = <0x0000 0 0 0 0>;
   21                 ieee80211-freq-limit = <2402000 2482000>,
   22                                        <5170000 5250000>;
   23         };
   24 };

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