[PATCH] iw: update freq to chan mappings for 6GHz band per IEEE P802.11ax/D6.1

[PATCH] iw: update freq to chan mappings for 6GHz band per IEEE P802.11ax/D6.1

[Pradeep Kumar Chitrapu]

This fixes dfferences in 6GHz frequencies which were updated in
IEEE P802.11ax/D6.1.

Also sync 60GHz band channel to freq mapping with kernel.

Fixes: 43789196 ("iw: sync frequency to channel mapping with kernel for 6GHz band")
Signed-off-by: Pradeep Kumar Chitrapu <pradeepc@codeaurora.org>
---
 util.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/util.c b/util.c
index ac6a96dc2851..048312c0aa58 100644
--- a/util.c
+++ b/util.c
@@ -181,12 +181,14 @@ int ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
 			return 5000 + chan * 5;
 		break;
 	case NL80211_BAND_6GHZ:
-	/* see 802.11ax D4.1 27.3.22.2 */
+		/* see 802.11ax D6.1 27.3.23.2 */
+		if (chan == 2)
+			return MHZ_TO_KHZ(5935);
 		if (chan <= 253)
-			return 5940 + chan * 5;
+			return 5950 + chan * 5;
 		break;
 	case NL80211_BAND_60GHZ:
-		if (chan < 5)
+		if (chan < 7)
 			return 56160 + chan * 2160;
 		break;
 	default:
@@ -200,15 +202,18 @@ int ieee80211_frequency_to_channel(int freq)
 	/* see 802.11-2007 17.3.8.3.2 and Annex J */
 	if (freq == 2484)
 		return 14;
+	/* see 802.11ax D6.1 27.3.23.2 and Annex E */
+	else if (freq == 5935)
+		return 2;
 	else if (freq < 2484)
 		return (freq - 2407) / 5;
 	else if (freq >= 4910 && freq <= 4980)
 		return (freq - 4000) / 5;
-	else if (freq < 5945)
+	else if (freq < 5950)
 		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;
+		/* see 802.11ax D6.1 27.3.23.2 */
+		return (freq - 5950) / 5;
 	else if (freq >= 58320 && freq <= 70200)
 		return (freq - 56160) / 2160;
 	else
-- 
2.17.1