From fa1f1085bc063da5a44f779c9b655b7026c52d68 Mon Sep 17 00:00:00 2001 From: Arend van Spriel Date: Fri, 2 Aug 2019 13:31:00 +0200 Subject: [PATCH] cfg80211: util: add 6GHz channel to freq conversion and vice versa Extend the functions ieee80211_channel_to_frequency() and ieee80211_frequency_to_channel() to support 6GHz band according specification in 802.11ax D4.1 27.3.22.2. Reviewed-by: Pieter-Paul Giesberts Reviewed-by: Leon Zegers Signed-off-by: Arend van Spriel Link: https://lore.kernel.org/r/1564745465-21234-4-git-send-email-arend.vanspriel@broadcom.com Signed-off-by: Johannes Berg --- net/wireless/util.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/net/wireless/util.c b/net/wireless/util.c index d0e35b7b9e35..c18d4fc440f4 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -91,6 +91,11 @@ int ieee80211_channel_to_frequency(int chan, enum nl80211_band band) else return 5000 + chan * 5; break; + case NL80211_BAND_6GHZ: + /* see 802.11ax D4.1 27.3.22.2 */ + if (chan <= 253) + return 5940 + chan * 5; + break; case NL80211_BAND_60GHZ: if (chan < 7) return 56160 + chan * 2160; @@ -111,8 +116,11 @@ int ieee80211_frequency_to_channel(int freq) return (freq - 2407) / 5; else if (freq >= 4910 && freq <= 4980) return (freq - 4000) / 5; - else if (freq <= 45000) /* DMG band lower limit */ + else if (freq < 5940) return (freq - 5000) / 5; + else if (freq <= 45000) /* DMG band lower limit */ + /* see 802.11ax D4.1 27.3.22.2 */ + return (freq - 5940) / 5; else if (freq >= 58320 && freq <= 70200) return (freq - 56160) / 2160; else -- 2.30.2