[Amlogic s905x2] Remuxing serial/uart port over sdcard/microsd connector

kernel.diff

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
index 45947c1031c4..95006ae7c33a 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
@@ -1536,6 +1556,14 @@ mux {
 							bias-disable;
 						};
 					};
+
+					uart_ao_a_c_pins: uart-a-ao-c {
+						mux {
+							groups = "uart_ao_a_rx_c", "uart_ao_a_tx_c";
+							function = "uart_ao_a_c";
+							bias-disable;
+						};
+					};
 				};
 			};
 
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a-sei510.dts b/arch/arm64/boot/dts/amlogic/meson-g12a-sei510.dts
index 4fb31c2ba31c..5f96c68d1123 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12a-sei510.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-g12a-sei510.dts
@@ -445,7 +445,7 @@ brcmf: wifi@1 {
 };
 
 /* SD card */
-&sd_emmc_b {
+/*&sd_emmc_b {
 	status = "okay";
 	pinctrl-0 = <&sdcard_c_pins>;
 	pinctrl-1 = <&sdcard_clk_gate_c_pins>;
@@ -459,7 +459,7 @@ &sd_emmc_b {
 	cd-gpios = <&gpio GPIOC_6 GPIO_ACTIVE_LOW>;
 	vmmc-supply = <&vddao_3v3>;
 	vqmmc-supply = <&vddao_3v3>;
-};
+};*/
 
 /* eMMC */
 &sd_emmc_c {
@@ -548,7 +548,7 @@ bluetooth {
 
 &uart_AO {
 	status = "okay";
-	pinctrl-0 = <&uart_ao_a_pins>;
+	pinctrl-0 = <&uart_ao_a_c_pins>;
 	pinctrl-names = "default";
 };