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Linux/WL1831MOD: Problem in setting country code and Dynamic Frequency Selection(DFS)

Part Number: WL1831MOD
Other Parts Discussed in Thread: WL1831

Tool/software: Linux

Hi i always got when i set the country code = US

example:   iw reg set US

cfg80211: Calling CRDA to update world regulatory domain

But my requirement is like this

[245061.956408] cfg80211: Regulatory domain changed to country: US
[245061.962414] cfg80211: DFS Master region: FCC
[245061.966705] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[245061.981174] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 3000 mBm), (N/A)
[245061.989329] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2300 mBm), (N/A)
[245062.005081] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2300 mBm), (0 s)
[245062.015226] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2300 mBm), (0 s)
[245062.027139] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 3000 mBm), (N/A)
[245062.037767] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)

But, what I got:

not a valid ISO/IEC 3166-1 alpha2

Special non-alpha2 usable entries:

00 World Regulatory domain

global

country 00: DFS-UNSET

(2402 - 2472 @ 40), (6, 20), (N/A)

(2457 - 2482 @ 40), (6, 20), (N/A), PASSIVE-SCAN

(2474 - 2494 @ 20), (6, 20), (N/A), NO-OFDM, PASSIVE-SCAN

(5170 - 5250 @ 160), (6, 20), (N/A), PASSIVE-SCAN

(5250 - 5330 @ 160), (6, 20), (0 ms), DFS, PASSIVE-SCAN

(5490 - 5730 @ 160), (6, 20), (0 ms), DFS, PASSIVE-SCAN

(5735 - 5835 @ 80), (6, 20), (N/A), PASSIVE-SCAN

(57240 - 63720 @ 2160), (N/A, 0), (N/A)

How to fix this issue.?

Regards,VinothS,