linux-kernel - [PATCH v2] arm64: dts: renesas: rzg2l-smarc: Enable CANFD

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Date:   Fri, 24 Sep 2021 11:23:38 +0100
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>
Cc:     linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
        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 v2] arm64: dts: renesas: rzg2l-smarc: Enable CANFD

Enable CANFD on RZ/G2L SMARC platform.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
v2:
-> Corrected STB pin states
---
 arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi | 40 ++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
index e895f6e7fa28..a02784fab46a 100644
--- a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
@@ -80,6 +80,20 @@
 	clock-frequency = <12288000>;
 };
 
+&canfd {
+	pinctrl-0 = <&can0_pins &can1_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	channel0 {
+		status = "okay";
+	};
+
+	channel1 {
+		status = "okay";
+	};
+};
+
 &ehci0 {
 	dr_mode = "otg";
 	status = "okay";
@@ -139,6 +153,32 @@
 	pinctrl-0 = <&sound_clk_pins>;
 	pinctrl-names = "default";
 
+	can0_pins: can0 {
+		pinmux = <RZG2L_PORT_PINMUX(10, 1, 2)>, /* TX */
+			 <RZG2L_PORT_PINMUX(11, 0, 2)>; /* RX */
+	};
+
+	/* SW7 should be at position 2->3 so that GPIO8_CAN0_STB line is activated */
+	can0-stb {
+		gpio-hog;
+		gpios = <RZG2L_GPIO(42, 2) GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "can0_stb";
+	};
+
+	can1_pins: can1 {
+		pinmux = <RZG2L_PORT_PINMUX(12, 1, 2)>, /* TX */
+			 <RZG2L_PORT_PINMUX(13, 0, 2)>; /* RX */
+	};
+
+	/* SW8 should be at position 2->3 so that GPIO9_CAN1_STB line is activated */
+	can1-stb {
+		gpio-hog;
+		gpios = <RZG2L_GPIO(42, 3) GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "can1_stb";
+	};
+
 	i2c0_pins: i2c0 {
 		pins = "RIIC0_SDA", "RIIC0_SCL";
 		input-enable;
-- 
2.17.1