[PATCH rtw-next 3/9] wifi: rtw89: 8852cu: add quirk to disable 2.4 GHz band

[Ping-Ke Shih <pkshih@realtek.com>]

From: David Lee <sc.lee@realtek.com>

Add RTW89_QUIRK_DISABLE_2GHZ to the rtw89_quirks enum to allow
per-device suppression of the 2.4 GHz band.

Apply the quirk only for the 0x28de:0x2432 (VID:PID) USB device,
which operates only in 5/6 GHz bands.

Signed-off-by: David Lee <sc.lee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/core.c      | 3 +++
 drivers/net/wireless/realtek/rtw89/core.h      | 1 +
 drivers/net/wireless/realtek/rtw89/rtw8852cu.c | 3 ++-
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
index b87a72700b99..77a0e2582dbe 100644
--- a/drivers/net/wireless/realtek/rtw89/core.c
+++ b/drivers/net/wireless/realtek/rtw89/core.c
@@ -6418,6 +6418,9 @@ static int rtw89_core_set_supported_band(struct rtw89_dev *rtwdev)
 	u8 support_bands = rtwdev->chip->support_bands;
 	int ret;
 
+	if (test_bit(RTW89_QUIRK_DISABLE_2GHZ, rtwdev->quirks))
+		support_bands &= ~BIT(NL80211_BAND_2GHZ);
+
 	if (support_bands & BIT(NL80211_BAND_2GHZ)) {
 		sband = rtw89_core_sband_dup(rtwdev, &rtw89_sband_2ghz);
 		if (!sband)
diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index 70cf6cbf4e8a..9d782cbfee70 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -6057,6 +6057,7 @@ enum rtw89_quirks {
 	RTW89_QUIRK_THERMAL_PROT_120C,
 	RTW89_QUIRK_THERMAL_PROT_110C,
 	RTW89_QUIRK_HW_INFO_SYSFS,
+	RTW89_QUIRK_DISABLE_2GHZ,
 
 	NUM_OF_RTW89_QUIRKS,
 };
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852cu.c b/drivers/net/wireless/realtek/rtw89/rtw8852cu.c
index 51dd8fb05366..2dec9b845481 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852cu.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852cu.c
@@ -97,7 +97,8 @@ static const struct rtw89_driver_info rtw89_8852cu_valve_info = {
 	.variant = NULL,
 	.board = &rtw89_8852cu_valve_board,
 	.quirks = NULL,
-	.dev_id_quirks = BIT(RTW89_QUIRK_HW_INFO_SYSFS),
+	.dev_id_quirks = BIT(RTW89_QUIRK_HW_INFO_SYSFS) |
+			 BIT(RTW89_QUIRK_DISABLE_2GHZ),
 	.bus = {
 		.usb = &rtw8852c_usb_info,
 	},
-- 
2.25.1