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Date: Wed, 18 Mar 2009 23:10:28 -0700
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Subject: Re: [PATCH] iw: add support to print HT40-/+ on channels
From: "Luis R. Rodriguez" <lrodriguez@atheros.com>
To: johannes@sipsolutions.net
Cc: linux-wireless@vger.kernel.org,
	"Luis R. Rodriguez" <lrodriguez@atheros.com>
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On Wed, Mar 18, 2009 at 10:57 PM, Luis R. Rodriguez
<lrodriguez@atheros.com> wrote:
> You don't have to guess now if your channels support HT40-/+ now.
> This also helps with regulatory testing.

Oh and here's a screenshot:

When a country doesn't allow HT40 at all, you'll see:

                Frequencies:
                        * 2412 MHz [1] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2417 MHz [2] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2422 MHz [3] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2427 MHz [4] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2432 MHz [5] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2437 MHz [6] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2442 MHz [7] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2447 MHz [8] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2452 MHz [9] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2457 MHz [10] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2462 MHz [11] (27.0 dBm / 20 MHz) (HT40 disallowed)
                        * 2467 MHz [12] (disabled)
                        * 2472 MHz [13] (disabled)
                        * 2484 MHz [14] (disabled)

When HT40 is allowed but due to band edges either HT40- or HT4+ is not allowed:

                Frequencies:
                        * 2412 MHz [1] (27.0 dBm / 20 MHz) (HT40- disallowed)
                        * 2417 MHz [2] (27.0 dBm / 20 MHz) (HT40- disallowed)
                        * 2422 MHz [3] (27.0 dBm / 20 MHz) (HT40- disallowed)
                        * 2427 MHz [4] (27.0 dBm / 20 MHz) (HT40- disallowed)
                        * 2432 MHz [5] (27.0 dBm / 20 MHz)
                        * 2437 MHz [6] (27.0 dBm / 20 MHz)
                        * 2442 MHz [7] (27.0 dBm / 20 MHz)
                        * 2447 MHz [8] (27.0 dBm / 20 MHz) (HT40+ disallowed)
                        * 2452 MHz [9] (27.0 dBm / 20 MHz) (HT40+ disallowed)
                        * 2457 MHz [10] (27.0 dBm / 20 MHz) (HT40+ disallowed)
                        * 2462 MHz [11] (27.0 dBm / 20 MHz) (HT40+ disallowed)
                        * 2467 MHz [12] (disabled)
                        * 2472 MHz [13] (disabled)
                        * 2484 MHz [14] (disabled)

  Luis