diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
index 08c6d1a8c712d..6dd060f70ae75 100644
--- a/drivers/net/wireless/realtek/rtw89/core.c
+++ b/drivers/net/wireless/realtek/rtw89/core.c
@@ -3368,7 +3368,12 @@ static int rtw89_core_register_hw(struct rtw89_dev *rtwdev)
 		return ret;
 	}
 
-	hw->wiphy->reg_notifier = rtw89_regd_notifier;
+	ret = rtw89_regd_setup(rtwdev);
+	if (ret) {
+		rtw89_err(rtwdev, "failed to set up regd\n");
+		goto err_free_supported_band;
+	}
+
 	hw->wiphy->sar_capa = &rtw89_sar_capa;
 
 	ret = ieee80211_register_hw(hw);
diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index d9cc1005351e8..359c283fb529b 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -2673,6 +2673,7 @@ struct rtw89_chip_info {
 	u8 support_chanctx_num;
 	u8 support_bands;
 	bool support_bw160;
+	bool support_unii4;
 	bool support_ul_tb_ctrl;
 	bool hw_sec_hdr;
 	u8 rf_path_num;
@@ -4498,6 +4499,7 @@ int rtw89_core_release_sta_ba_entry(struct rtw89_dev *rtwdev,
 void rtw89_vif_type_mapping(struct ieee80211_vif *vif, bool assoc);
 int rtw89_chip_info_setup(struct rtw89_dev *rtwdev);
 bool rtw89_ra_report_to_bitrate(struct rtw89_dev *rtwdev, u8 rpt_rate, u16 *bitrate);
+int rtw89_regd_setup(struct rtw89_dev *rtwdev);
 int rtw89_regd_init(struct rtw89_dev *rtwdev,
 		    void (*reg_notifier)(struct wiphy *wiphy, struct regulatory_request *request));
 void rtw89_regd_notifier(struct wiphy *wiphy, struct regulatory_request *request);
diff --git a/drivers/net/wireless/realtek/rtw89/regd.c b/drivers/net/wireless/realtek/rtw89/regd.c
index 6e5a740b128f0..7800ca36bc133 100644
--- a/drivers/net/wireless/realtek/rtw89/regd.c
+++ b/drivers/net/wireless/realtek/rtw89/regd.c
@@ -2,6 +2,7 @@
 /* Copyright(c) 2019-2020  Realtek Corporation
  */
 
+#include "acpi.h"
 #include "debug.h"
 #include "ps.h"
 
@@ -282,6 +283,56 @@ do { \
 		    __r->txpwr_regd[RTW89_BAND_6G]); \
 } while (0)
 
+static void rtw89_regd_setup_unii4(struct rtw89_dev *rtwdev,
+				   struct wiphy *wiphy)
+{
+	const struct rtw89_chip_info *chip = rtwdev->chip;
+	bool regd_allow_unii_4 = chip->support_unii4;
+	int ret;
+	u8 val;
+
+	if (!chip->support_unii4)
+		goto bottom;
+
+	ret = rtw89_acpi_evaluate_dsm(rtwdev, RTW89_ACPI_DSM_FUNC_59G_EN, &val);
+	if (ret) {
+		rtw89_debug(rtwdev, RTW89_DBG_REGD,
+			    "acpi: cannot eval unii 4: %d\n", ret);
+		goto bottom;
+	}
+
+	rtw89_debug(rtwdev, RTW89_DBG_REGD,
+		    "acpi: eval if allow unii 4: %d\n", val);
+
+	switch (val) {
+	case 0:
+		regd_allow_unii_4 = false;
+		break;
+	case 1:
+		regd_allow_unii_4 = true;
+		break;
+	default:
+		break;
+	}
+
+bottom:
+	rtw89_debug(rtwdev, RTW89_DBG_REGD, "regd: allow unii 4: %d\n",
+		    regd_allow_unii_4);
+}
+
+int rtw89_regd_setup(struct rtw89_dev *rtwdev)
+{
+	struct wiphy *wiphy = rtwdev->hw->wiphy;
+
+	if (!wiphy)
+		return -EINVAL;
+
+	rtw89_regd_setup_unii4(rtwdev, wiphy);
+
+	wiphy->reg_notifier = rtw89_regd_notifier;
+	return 0;
+}
+
 int rtw89_regd_init(struct rtw89_dev *rtwdev,
 		    void (*reg_notifier)(struct wiphy *wiphy,
 					 struct regulatory_request *request))
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8851b.c b/drivers/net/wireless/realtek/rtw89/rtw8851b.c
index a0aaac74b0ec8..7192802bd5404 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8851b.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8851b.c
@@ -55,6 +55,7 @@ const struct rtw89_chip_info rtw8851b_chip_info = {
 	.support_bands		= BIT(NL80211_BAND_2GHZ) |
 				  BIT(NL80211_BAND_5GHZ),
 	.support_bw160		= false,
+	.support_unii4		= true,
 	.support_ul_tb_ctrl	= true,
 	.hw_sec_hdr		= false,
 	.rf_path_num		= 1,
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852a.c b/drivers/net/wireless/realtek/rtw89/rtw8852a.c
index eff6519cf0191..73a7f630bf45b 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852a.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852a.c
@@ -2082,6 +2082,7 @@ const struct rtw89_chip_info rtw8852a_chip_info = {
 	.support_bands		= BIT(NL80211_BAND_2GHZ) |
 				  BIT(NL80211_BAND_5GHZ),
 	.support_bw160		= false,
+	.support_unii4		= false,
 	.support_ul_tb_ctrl     = false,
 	.hw_sec_hdr		= false,
 	.rf_path_num		= 2,
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852b.c b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
index 81b348631519d..8eb8c84707b21 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852b.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
@@ -2460,6 +2460,7 @@ const struct rtw89_chip_info rtw8852b_chip_info = {
 	.support_bands		= BIT(NL80211_BAND_2GHZ) |
 				  BIT(NL80211_BAND_5GHZ),
 	.support_bw160		= false,
+	.support_unii4		= true,
 	.support_ul_tb_ctrl	= true,
 	.hw_sec_hdr		= false,
 	.rf_path_num		= 2,
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c.c b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
index 4f57d76ba26f7..e63beac377435 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
@@ -2892,6 +2892,7 @@ const struct rtw89_chip_info rtw8852c_chip_info = {
 				  BIT(NL80211_BAND_5GHZ) |
 				  BIT(NL80211_BAND_6GHZ),
 	.support_bw160		= true,
+	.support_unii4		= true,
 	.support_ul_tb_ctrl     = false,
 	.hw_sec_hdr		= true,
 	.rf_path_num		= 2,