Here is a output of this debugfs entry

root@OpenWrt:/# cat /sys/kernel/debug/ieee80211/phy0/vht80allow_map
2412 VHT80 N
2417 VHT80 N
2422 VHT80 N
2427 VHT80 N
2432 VHT80 N
2437 VHT80 N
2442 VHT80 N
2447 VHT80 N
2452 VHT80 N
2457 VHT80 N
2462 VHT80 N
2467 Disabled
2472 Disabled
2484 Disabled
5180 VHT80 Y
5200 VHT80 Y
5220 VHT80 Y
5240 VHT80 Y
5260 VHT80 Y
5280 VHT80 Y
5300 VHT80 Y
5320 VHT80 Y
5500 VHT80 Y
5520 VHT80 Y
5540 VHT80 Y
5560 VHT80 Y
5580 VHT80 Y
5600 Disabled
5620 Disabled
5640 Disabled
5660 VHT80 Y
5680 VHT80 Y
5700 VHT80 Y
5745 VHT80 Y
5765 VHT80 Y
5785 VHT80 Y
5805 VHT80 Y
5825 VHT80 Y

Signed-off-by: Ashok Raj Nagarajan <arnag...@qti.qualcomm.com>
---
 net/wireless/debugfs.c |   61 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

diff --git a/net/wireless/debugfs.c b/net/wireless/debugfs.c
index 4541577..0349dcd 100644
--- a/net/wireless/debugfs.c
+++ b/net/wireless/debugfs.c
@@ -102,6 +102,66 @@ static const struct file_operations ht40allow_map_ops = {
        .llseek = default_llseek,
 };
 
+static int vht80_print_chan(struct ieee80211_channel *chan,
+                           char *buf, int buf_size, int offset)
+{
+       if (WARN_ON(offset > buf_size))
+               return 0;
+
+       if (chan->flags & IEEE80211_CHAN_DISABLED)
+               return scnprintf(buf + offset,
+                                buf_size - offset,
+                                "%d Disabled\n",
+                                chan->center_freq);
+
+       return scnprintf(buf + offset,
+                        buf_size - offset,
+                        "%d VHT80 %c\n",
+                        chan->center_freq,
+                        (chan->flags & IEEE80211_CHAN_NO_80MHZ) ?
+                               'N' : 'Y');
+}
+
+static ssize_t vht80allow_map_read(struct file *file,
+                                  char __user *user_buf,
+                                  size_t count, loff_t *ppos)
+{
+       struct wiphy *wiphy = file->private_data;
+       char *buf;
+       unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
+       enum ieee80211_band band;
+       struct ieee80211_supported_band *sband;
+
+       buf = kzalloc(buf_size, GFP_KERNEL);
+       if (!buf)
+               return -ENOMEM;
+
+       rtnl_lock();
+
+       for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+               sband = wiphy->bands[band];
+               if (!sband)
+                       continue;
+               for (i = 0; i < sband->n_channels; i++)
+                       offset += vht80_print_chan(&sband->channels[i],
+                                                  buf, buf_size, offset);
+       }
+
+       rtnl_unlock();
+
+       r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
+
+       kfree(buf);
+
+       return r;
+}
+
+static const struct file_operations vht80allow_map_ops = {
+       .read = vht80allow_map_read,
+       .open = simple_open,
+       .llseek = default_llseek,
+};
+
 #define DEBUGFS_ADD(name)                                              \
        debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);
 
@@ -114,4 +174,5 @@ void cfg80211_debugfs_rdev_add(struct 
cfg80211_registered_device *rdev)
        DEBUGFS_ADD(short_retry_limit);
        DEBUGFS_ADD(long_retry_limit);
        DEBUGFS_ADD(ht40allow_map);
+       DEBUGFS_ADD(vht80allow_map);
 }
-- 
1.7.9.5

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