[PATCH v5] ARM: dts: r9a06g032-rzn1d400-db: Enable CAN1

[Biju Das <biju.das.jz@xxxxxxxxxxxxxx>]

The CN10/CN11 on RZ/N1-EB board are headers to add jumpers to select which
CAN interface to route to the real CAN connector J16.

For a normal use case either we need to wire CAN1 or CAN2, but not both.

This patch enables CAN1 and disables CAN2 by default assuming CN10/CN11
is wired for CAN1.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v4->v5:
 * Updated commit description
 * Enabled CAN1 and disabled CAN2 by default,assuming CN10/CN11
   is wired for CAN1.
v3->v4:
 * Updated commit description
 * Enabled CAN2 by default
 * Added a macro BOARD_HAS_CAN1_ENABLED to configure CAN1,
   if the board supports it.
v2->v3:
 * No change
v1->v2:
 * No change
---
 arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts | 28 +++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts b/arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts
index 4bf813335e21..c18bbd7141c4 100644
--- a/arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts
+++ b/arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts
@@ -26,6 +26,22 @@ aliases {
 	};
 };
 
+&can0 {
+	pinctrl-0 = <&pins_can0>;
+	pinctrl-names = "default";
+
+	/* Assuming CN10/CN11 are wired for CAN1 */
+	status = "okay";
+};
+
+&can1 {
+	pinctrl-0 = <&pins_can1>;
+	pinctrl-names = "default";
+
+	/* Please only enable can0 or can1, depending on CN10/CN11 */
+	/* status = "okay"; */
+};
+
 &eth_miic {
 	status = "okay";
 	renesas,miic-switch-portin = <MIIC_GMAC2_PORT>;
@@ -52,6 +68,18 @@ &mii_conv5 {
 };
 
 &pinctrl{
+	pins_can0: pins_can0 {
+		pinmux = <RZN1_PINMUX(162, RZN1_FUNC_CAN)>,	/* CAN0_TXD */
+			 <RZN1_PINMUX(163, RZN1_FUNC_CAN)>;	/* CAN0_RXD */
+		drive-strength = <6>;
+	};
+
+	pins_can1: pins_can1 {
+		pinmux = <RZN1_PINMUX(109, RZN1_FUNC_CAN)>,	/* CAN1_TXD */
+			 <RZN1_PINMUX(110, RZN1_FUNC_CAN)>;	/* CAN1_RXD */
+		drive-strength = <6>;
+	};
+
 	pins_eth3: pins_eth3 {
 		pinmux = <RZN1_PINMUX(36, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
 			 <RZN1_PINMUX(37, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
-- 
2.25.1