[C12][DT][DTO] wilink: bluetooth: use hci_ll driver

For wilink bluetooth, the driver to use is BT_HCIUART_LL.
In the past, btwilink plus TI_ST (kim) was used instead, but that
combination is now deprecated.

REFERENCE:
https://lore.kernel.org/all/20191020205901.56bafijk7cu3rpaj@earth.universe/T/

arch/arm64/boot/dts/seco/overlays/seco-imx8mq-c12-wilink-overlay.dts

@@ -12,25 +12,25 @@
  * GNU General Public License for more details.
  */
 /*
- * Dts overlay for C12 Wifi+BT module 
+ * Dts overlay for C12 Wifi+BT module
  */
 
 /dts-v1/;
 /plugin/;
 
 / {
-	compatible = "fsl,imx8mq-evk","fsl,seco-imx8mq-c12", "fsl,imx8mq"; 
+	compatible = "fsl,imx8mq-evk","fsl,seco-imx8mq-c12", "fsl,imx8mq";
 
 /*  __________________________________________________________________________
  * |                                                                          |
- * |                               WiFi		                              |
+ * |                                   WiFi                                   |
  * |__________________________________________________________________________|
  */
 
 
-    	fragment@0 {
-        	target = <&usdhc2>;
-        	__overlay__ {
+	fragment@0 {
+		target = <&usdhc2>;
+		__overlay__ {
 			pinctrl-names = "default", "state_100mhz", "state_200mhz";
 			pinctrl-0 = <&pinctrl_usdhc2>, <&pinctrl_usdhc2_gpio>,<&pinctrl_wlan>;
 			/delete-property/ cd-gpios;
@@ -41,6 +41,7 @@
 			status = "okay";
 
 			wlcore: wlcore@2 {
+				compatible = "ti,wl1831";
 				status = "okay";
 			};
 		};
@@ -48,22 +49,19 @@
 
 /*  __________________________________________________________________________
  * |                                                                          |
- * |                             BLUETOOTH                                    |
+ * |                                BLUETOOTH                                 |
  * |__________________________________________________________________________|
  */
 
-	 fragment@1 {
-                target-path = "/";
-                __overlay__  {
-			kim { 
-				compatible = "kim";
-				nshutdown_gpio = "null";
-				dev_name = "/dev/ttymxc3";
-				flow_cntrl = <1>;
-				baud_rate = <1000000>;
+	fragment@1 {
+		target = <&uart4>;
+		__overlay__ {
+			bluetooth {
+				compatible = "ti,wl1831-st";
+				enable-gpios = <&gpio3 22 0>;
 			};
-
 		};
 	};
+
 };
 

arch/arm64/boot/dts/seco/seco-imx8mq-c12.dts

@@ -166,14 +166,6 @@
 		};
 	};
 
-	modem_reset: modem-reset {
-		compatible = "gpio-reset";
-		reset-gpios = <&gpio3 22 GPIO_ACTIVE_LOW>;
-		reset-delay-us = <2000>;
-		reset-post-delay-ms = <40>;
-		#reset-cells = <0>;
-	};
-
 	soundhdmi: sound-hdmi {
 		compatible = "fsl,seco-imx8mq-c12-cdnhdmi",
 				"fsl,imx8mq-evk-cdnhdmi",
@@ -987,7 +979,6 @@
 	assigned-clocks = <&clk IMX8MQ_CLK_UART4>;
 	assigned-clock-parents = <&clk IMX8MQ_SYS1_PLL_80M>;
 	fsl,uart-has-rtscts;
- 	resets = <&modem_reset>;
  	status = "okay";
 };
 
@@ -1082,12 +1073,10 @@
 	#size-cells = <0>;
 
 	wlcore: wlcore@2 {
-		compatible = "ti,wl1831";
 		reg = <2>;
 		interrupt-parent = <&gpio3>;
 		interrupts = <23 IRQ_TYPE_LEVEL_HIGH>;
 		status = "disabled";
-		
 	};
 };