wifi: rtw89: 8852c: set pin MUX to enable BT firmware log

8852CE is a combo chip, and WiFi driver controls pin MUX. To output BT
firmware log to specific hardware pin, set pin MUX to achieve.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220930134417.10282-1-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/reg.h

@@ -229,6 +229,10 @@
 
 #define R_AX_GPIO0_7_FUNC_SEL 0x02D0
 
+#define R_AX_LED1_FUNC_SEL 0x02DC
+#define B_AX_PINMUX_EESK_FUNC_SEL_V1_MASK GENMASK(27, 24)
+#define PINMUX_EESK_FUNC_SEL_BT_LOG 0x1
+
 #define R_AX_GPIO0_15_EECS_EESK_LED1_PULL_LOW_EN 0x02E4
 #define B_AX_LED1_PULL_LOW_EN BIT(18)
 #define B_AX_EESK_PULL_LOW_EN BIT(17)

drivers/net/wireless/realtek/rtw89/rtw8852c.c

@@ -273,6 +273,9 @@ static int rtw8852c_pwr_on_func(struct rtw89_dev *rtwdev)
 			  B_AX_CMAC_DMA_EN | B_AX_PTCLTOP_EN | B_AX_SCHEDULER_EN |
 			  B_AX_TMAC_EN | B_AX_RMAC_EN);
 
+	rtw89_write32_mask(rtwdev, R_AX_LED1_FUNC_SEL, B_AX_PINMUX_EESK_FUNC_SEL_V1_MASK,
+			   PINMUX_EESK_FUNC_SEL_BT_LOG);
+
 	return 0;
 }