[FS#261] iwinfo / txpowerlist / fails on powerpc aka TP-LINK TL-WDR4900 v1

[LEDE Bugs]

The following task has a new comment added:

FS#261 - iwinfo / txpowerlist / fails on powerpc aka TP-LINK TL-WDR4900 v1
User who did this - arjendekorte (arjendekorte)

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Netgear WNDR-4300 with ath9k (r2143). Strange thing is, that phy1 honors the settings from uci, while phy1 doesn't. Could this be some automatic power saving mode or reduced power settings due to congestion (there are lots of 2.4G connections around).

root at gateway:~# uci show wireless|grep txpower
wireless.radio0.txpower='20'
wireless.radio1.txpower='22'
root at gateway:~# iwinfo wlan0 txpowerlist
   0 dBm (   1 mW)
   1 dBm (   1 mW)
   2 dBm (   1 mW)
   3 dBm (   1 mW)
   4 dBm (   2 mW)
   5 dBm (   3 mW)
   6 dBm (   3 mW)
   7 dBm (   5 mW)
   8 dBm (   6 mW)
   9 dBm (   7 mW)
  10 dBm (  10 mW)
  11 dBm (  12 mW)
  12 dBm (  15 mW)
  13 dBm (  19 mW)
  14 dBm (  25 mW)
  15 dBm (  31 mW)
* 16 dBm (  39 mW)
  17 dBm (  50 mW)
  18 dBm (  63 mW)
  19 dBm (  79 mW)
  20 dBm ( 100 mW)
root at gateway:~# iwinfo wlan1 txpowerlist
   0 dBm (   1 mW)
   1 dBm (   1 mW)
   2 dBm (   1 mW)
   3 dBm (   1 mW)
   4 dBm (   2 mW)
   5 dBm (   3 mW)
   6 dBm (   3 mW)
   7 dBm (   5 mW)
   8 dBm (   6 mW)
   9 dBm (   7 mW)
  10 dBm (  10 mW)
  11 dBm (  12 mW)
  12 dBm (  15 mW)
  13 dBm (  19 mW)
  14 dBm (  25 mW)
  15 dBm (  31 mW)
  16 dBm (  39 mW)
  17 dBm (  50 mW)
  18 dBm (  63 mW)
  19 dBm (  79 mW)
  20 dBm ( 100 mW)
  21 dBm ( 125 mW)
* 22 dBm ( 158 mW)

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=261#comment807