Revert "wireless-regdb: Update and disable 5470-5730MHz band according to TPC requirement for Singapore (SG)"

Singapore's regulatory authority has confirmed that 3 dBm EIRP reduction may be used in lieu of TPC support:

> Dear Mr Yong
>
> We refer to our email of 17 January 2024.
>
> RLAN operations at sub-band 34 and 35 is allowed to transmit at ≤1000mw eirp with TPC and DFS employed. IMDA TS SRD Table 1 sub-band 34 and 35 can take reference from either ETSI EN 301 893 or FCC Part15 §15.407.
>
> As stated earlier, FCC has pointed out that the TPC will not be required if eirp is less than 500mW.
> However, as the latest revision of TS SRD has just been published in Sep 2023, we will consider making modifications to it in the next release.
>
> - IMDA INFO (IMDA) <info@imda.gov.sg> on 2024-01-26

> Dear Andrew
>
> We refer to our email 31 January 2024.
>
> Kindly be informed that IMDA does not issue addendum documents. You may wish to cite this email to the maintainer.
>
> - IMDA INFO (IMDA) <info@imda.gov.sg>	on 2024-02-07

Related wireless-regdb email/thread:
- [[PATCH] wireless-regdb: Update and disable 5470-5730MHz band according to TPC requirement for Singapore (SG)](https://lists.infradead.org/pipermail/wireless-regdb/2024-February/001517.html)

This reverts commit d695bf21d1cdf02e64924f452c242f7588469609.

Signed-off-by: Andrew Yong <me@ndoo.sg>
Link: https://lore.kernel.org/r/20240217014542.12971-1-me@ndoo.sg
Signed-off-by: Chen-Yu Tsai <wens@kernel.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/db.txt b/db.txt
index ed76600..15b439d 100644
--- a/db.txt
+++ b/db.txt
@@ -1594,7 +1594,10 @@ country SE: DFS-ETSI
 # 5725 - 5850 MHz: IMDA TS SRD, Table 1 Sub-band 35
 # 5945 - 6425 MHz: IMDA TS SRD, Table 1 Sub-band 45b
 # 57000 - 66000 MHz: IMDA TS SRD, Table 1 Sub-band 40
+# Note: 500mW for 5470-5725MHz bands per FCC Part 15 Section 15.407 (2) 5.47-5.725 GHz as referenced by IMDA TS SRD
+#  AU and BG regulatory domains use the same interpretation of cited FCC and ETSI standards
 # Note: The transmit power for 5250-5350MHz bands can be raised (by 3dBm) to 200mW when TPC is implemented: IMDA TS SRD, Table 1 Sub-band 33a
+# Note: The transmit power for 5470-5725MHz bands can be raised (by 3dBm) to 1000mW when TPC is implemented: IMDA TS SRD Table 1 Sub-band 34
 
 country SG: DFS-FCC
 	(2400 - 2483.5 @ 40), (200 mW)
@@ -1604,8 +1607,7 @@ country SG: DFS-FCC
         # Since 5725 ~ 5730 MHz belongs to the next range which has looser
         # requirements, we can extend the range by 5 MHz to make the kernel
         # happy and be able to use channel 144.
-	# 5470 - 5730 requires (unimplemented) TPC per legislation
-        #(5470 - 5730 @ 160), (1000 mW), DFS
+	(5470 - 5730 @ 160), (500 mW), DFS
 	(5725 - 5850 @ 80), (1000 mW)
 	(5945 - 6425 @ 320), (250 mW), NO-OUTDOOR
 	(57000 - 66000 @ 2160), (10000 mW)