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authorRafał Miłecki <rafal@milecki.pl>2017-01-04 18:58:29 +0100
committerJohannes Berg <johannes.berg@intel.com>2017-01-06 13:53:31 +0100
commitb330b25eaabda00d74e47566d9200907da381896 (patch)
tree11df0d13e93b5c05d314a41fd7ac7c50bb54b6da /Documentation/devicetree/bindings/net/wireless
parentwireless: move IEEE80211_NUM_ACS to ieee80211.h (diff)
downloadlinux-b330b25eaabda00d74e47566d9200907da381896.tar.xz
linux-b330b25eaabda00d74e47566d9200907da381896.zip
dt-bindings: document common IEEE 802.11 frequency limit property
This new file should be used for properties that apply to all wireless devices. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'Documentation/devicetree/bindings/net/wireless')
-rw-r--r--Documentation/devicetree/bindings/net/wireless/ieee80211.txt24
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diff --git a/Documentation/devicetree/bindings/net/wireless/ieee80211.txt b/Documentation/devicetree/bindings/net/wireless/ieee80211.txt
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+++ b/Documentation/devicetree/bindings/net/wireless/ieee80211.txt
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+Common IEEE 802.11 properties
+
+This provides documentation of common properties that are valid for all wireless
+devices.
+
+Optional properties:
+ - ieee80211-freq-limit : list of supported frequency ranges in KHz. This can be
+ used for devices that in a given config support less channels than
+ normally. It may happen chipset supports a wide wireless band but it is
+ limited to some part of it due to used antennas or power amplifier.
+ An example case for this can be tri-band wireless router with two
+ identical chipsets used for two different 5 GHz subbands. Using them
+ incorrectly could not work or decrease performance noticeably.
+
+Example:
+
+pcie@0,0 {
+ reg = <0x0000 0 0 0 0>;
+ wifi@0,0 {
+ reg = <0x0000 0 0 0 0>;
+ ieee80211-freq-limit = <2402000 2482000>,
+ <5170000 5250000>;
+ };
+};