linux-kernel - [PATCH 3/3] arm64: dts: renesas: rzg2l-smarc: Enable SCIF2 on carrier board

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Date:   Wed,  3 Nov 2021 19:56:00 +0000
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 3/3] 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@...renesas.com>
Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
---
 arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi | 28 ++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
index 2863e487a640..4c32f068a1f0 100644
--- 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>;
-- 
2.17.1