arm64: dts: renesas: rzg2l-smarc: Enable SCIF2 on carrier board

SCIF2 interface is available on PMOD1 connector (CN7) on carrier board,
This patch adds pinmux and scif2 node to carrier board dtsi file.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20211103195600.23964-4-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
index 2863e48..4c32f06 100644 (file)
--- a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
@@ -21,9 +21,13 @@
  *
  */
 
+/* comment the #define statement to disable SCIF2 (SER0) on PMOD1 (CN7) */
+#define PMOD1_SER0     1
+
 / {
        aliases {
                serial0 = &scif0;
+               serial1 = &scif2;
                i2c0 = &i2c0;
                i2c1 = &i2c1;
                i2c3 = &i2c3;
@@ -208,6 +212,13 @@
                         <RZG2L_PORT_PINMUX(38, 1, 1)>; /* RxD */
        };
 
+       scif2_pins: scif2 {
+               pinmux = <RZG2L_PORT_PINMUX(48, 0, 1)>, /* TxD */
+                        <RZG2L_PORT_PINMUX(48, 1, 1)>, /* RxD */
+                        <RZG2L_PORT_PINMUX(48, 3, 1)>, /* CTS# */
+                        <RZG2L_PORT_PINMUX(48, 4, 1)>; /* RTS# */
+       };
+
        sd1-pwr-en-hog {
                gpio-hog;
                gpios = <RZG2L_GPIO(39, 2) GPIO_ACTIVE_HIGH>;
@@ -277,6 +288,23 @@
        status = "okay";
 };
 
+/*
+ * To enable SCIF2 (SER0) on PMOD1 (CN7)
+ * SW1 should be at position 2->3 so that SER0_CTS# line is activated
+ * SW2 should be at position 2->3 so that SER0_TX line is activated
+ * SW3 should be at position 2->3 so that SER0_RX line is activated
+ * SW4 should be at position 2->3 so that SER0_RTS# line is activated
+ */
+#if PMOD1_SER0
+&scif2 {
+       pinctrl-0 = <&scif2_pins>;
+       pinctrl-names = "default";
+
+       uart-has-rtscts;
+       status = "okay";
+};
+#endif
+
 &sdhi1 {
        pinctrl-0 = <&sdhi1_pins>;
        pinctrl-1 = <&sdhi1_pins_uhs>;