ARM64: dts: meson-gx: add the serial CTS and RTS pin groups

This adds pinctrl group nodes for the CTS and RTS pins of each serial
controller. This makes it possible to enable the CTS and RTS pins which
are controlled by the serial controller hardware (through the meson_uart
driver).
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi

@@ -138,6 +138,14 @@ mux {
 			};
 		};
 
+		uart_ao_a_cts_rts_pins: uart_ao_a_cts_rts {
+			mux {
+				groups = "uart_cts_ao_a",
+				       "uart_rts_ao_a";
+				function = "uart_ao";
+			};
+		};
+
 		uart_ao_b_pins: uart_ao_b {
 			mux {
 				groups = "uart_tx_ao_b", "uart_rx_ao_b";
@@ -145,6 +153,14 @@ mux {
 			};
 		};
 
+		uart_ao_b_cts_rts_pins: uart_ao_b_cts_rts {
+			mux {
+				groups = "uart_cts_ao_b",
+				       "uart_rts_ao_b";
+				function = "uart_ao_b";
+			};
+		};
+
 		remote_input_ao_pins: remote_input_ao {
 			mux {
 				groups = "remote_input_ao";
@@ -290,6 +306,14 @@ mux {
 			};
 		};
 
+		uart_a_cts_rts_pins: uart_a_cts_rts {
+			mux {
+				groups = "uart_cts_a",
+				       "uart_rts_a";
+				function = "uart_a";
+			};
+		};
+
 		uart_b_pins: uart_b {
 			mux {
 				groups = "uart_tx_b",
@@ -298,6 +322,14 @@ mux {
 			};
 		};
 
+		uart_b_cts_rts_pins: uart_b_cts_rts {
+			mux {
+				groups = "uart_cts_b",
+				       "uart_rts_b";
+				function = "uart_b";
+			};
+		};
+
 		uart_c_pins: uart_c {
 			mux {
 				groups = "uart_tx_c",
@@ -306,6 +338,14 @@ mux {
 			};
 		};
 
+		uart_c_cts_rts_pins: uart_c_cts_rts {
+			mux {
+				groups = "uart_cts_c",
+				       "uart_rts_c";
+				function = "uart_c";
+			};
+		};
+
 		i2c_a_pins: i2c_a {
 			mux {
 				groups = "i2c_sck_a",

arch/arm64/boot/dts/amlogic/meson-gxl.dtsi

@@ -88,6 +88,14 @@ mux {
 			};
 		};
 
+		uart_ao_a_cts_rts_pins: uart_ao_a_cts_rts {
+			mux {
+				groups = "uart_cts_ao_a",
+				       "uart_rts_ao_a";
+				function = "uart_ao";
+			};
+		};
+
 		uart_ao_b_pins: uart_ao_b {
 			mux {
 				groups = "uart_tx_ao_b", "uart_rx_ao_b";
@@ -95,6 +103,14 @@ mux {
 			};
 		};
 
+		uart_ao_b_cts_rts_pins: uart_ao_b_cts_rts {
+			mux {
+				groups = "uart_cts_ao_b",
+				       "uart_rts_ao_b";
+				function = "uart_ao_b";
+			};
+		};
+
 		remote_input_ao_pins: remote_input_ao {
 			mux {
 				groups = "remote_input_ao";
@@ -170,6 +186,14 @@ mux {
 			};
 		};
 
+		uart_a_cts_rts_pins: uart_a_cts_rts {
+			mux {
+				groups = "uart_cts_a",
+				       "uart_rts_a";
+				function = "uart_a";
+			};
+		};
+
 		uart_b_pins: uart_b {
 			mux {
 				groups = "uart_tx_b",
@@ -178,6 +202,14 @@ mux {
 			};
 		};
 
+		uart_b_cts_rts_pins: uart_b_cts_rts {
+			mux {
+				groups = "uart_cts_b",
+				       "uart_rts_b";
+				function = "uart_b";
+			};
+		};
+
 		uart_c_pins: uart_c {
 			mux {
 				groups = "uart_tx_c",
@@ -186,6 +218,14 @@ mux {
 			};
 		};
 
+		uart_c_cts_rts_pins: uart_c_cts_rts {
+			mux {
+				groups = "uart_cts_c",
+				       "uart_rts_c";
+				function = "uart_c";
+			};
+		};
+
 		i2c_a_pins: i2c_a {
 			mux {
 				groups = "i2c_sck_a",