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ath10k-ct: limit available channels via DT

This backports upstream commit

34d5629 ath10k: limit available channels via DT ieee80211-freq-limit

to the 4.19 ath10k-ct version. Without this patch, disabled channels
are still listed as a supported configuration for the radio.

The identical patch was also backported by OpenWRT to the non-ct driver.
It can be dropped as soon as we switch to an ath10k-ct version based on
4.20 or higher.

Signed-off-by: David Bauer <>
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blocktrron authored and chunkeey committed Mar 4, 2019
1 parent fc2fd1c commit 4484ef587a6b29242f5bb1bec5b7762363b45175
@@ -0,0 +1,39 @@
From bbf0a8af2261bc7ae39b227ff6a1e9f45a008c27 Mon Sep 17 00:00:00 2001
From: Sven Eckelmann <>
Date: Mon, 30 Jul 2018 17:31:41 +0200
Subject: [PATCH] ath10k: Limit available channels via DT ieee80211-freq-limit

Tri-band devices (1x 2.4GHz + 2x 5GHz) often incorporate special filters in
the RX and TX path. These filtered channel can in theory still be used by
the hardware but the signal strength is reduced so much that it makes no

There is already a DT property to limit the available channels but ath10k
has to manually call this functionality to limit the currrently set wiphy
channels further.

Signed-off-by: Sven Eckelmann <>

drivers/net/wireless/ath/ath10k/mac.c | 2 ++
1 file changed, 2 insertions(+)

--- a/ath10k-4.19/mac.c
+++ b/ath10k-4.19/mac.c
@@ -18,6 +18,7 @@

#include "mac.h"

+#include <net/cfg80211.h>
#include <net/mac80211.h>
#include <linux/etherdevice.h>
#include <linux/acpi.h>
@@ -8390,6 +8391,7 @@ int ath10k_mac_register(struct ath10k *a
ar->hw->wiphy->bands[NL80211_BAND_5GHZ] = band;

+ wiphy_read_of_freq_limits(ar->hw->wiphy);

ar->hw->wiphy->interface_modes =

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