arm64: dts: renesas: r9a09g047e57-smarc: Enable CAN Transceiver

Enable TCAN1046V-Q1 CAN Transceiver populated on RZ/G3E SMARC EVK by
modelling it as two instances of tcan1042.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250320164121.193857-4-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
index 7e1daaabce8a9a888714eb6eaa4c771d125ffa8e..1f5e61a73c35b48014f5077873d6dba90d9b35a1 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
@@ -8,6 +8,8 @@
 /dts-v1/;
 
 /* Switch selection settings */
+#define SW_GPIO8_CAN0_STB      0
+#define SW_GPIO9_CAN1_STB      0
 #define SW_LCD_EN              0
 #define SW_PDM_EN              0
 #define SW_SD0_DEV_SEL         0
@@ -42,16 +44,36 @@
 #if (!SW_PDM_EN)
        channel1 {
                status = "okay";
+#if (!SW_LCD_EN) && (SW_GPIO9_CAN1_STB)
+               phys = <&can_transceiver1>;
+#endif
        };
 #endif
 
 #if (!SW_LCD_EN)
        channel4 {
                status = "okay";
+#if (SW_GPIO8_CAN0_STB)
+               phys = <&can_transceiver0>;
+#endif
        };
 #endif
 };
 
+#if (!SW_LCD_EN) && (SW_GPIO8_CAN0_STB)
+&can_transceiver0 {
+       standby-gpios = <&pinctrl RZG3E_GPIO(5, 4) GPIO_ACTIVE_HIGH>;
+       status = "okay";
+};
+#endif
+
+#if (!SW_LCD_EN) && (SW_GPIO9_CAN1_STB)
+&can_transceiver1 {
+       standby-gpios = <&pinctrl RZG3E_GPIO(5, 5) GPIO_ACTIVE_HIGH>;
+       status = "okay";
+};
+#endif
+
 &pinctrl {
        canfd_pins: canfd {
                can1_pins: can1 {

diff --git a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
index 1d3a844174b378cf3d17210fa8455d79cfc3c77f..afdc1940e24abb903e93d252cf6e558abce518c8 100644 (file)
--- a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
+++ b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
@@ -12,6 +12,17 @@
  * SW_SDIO_M2E:
  *     0 - SMARC SDIO signal is connected to uSD1
  *     1 - SMARC SDIO signal is connected to M.2 Key E connector
+ *
+ * Please set the switch position SW_GPIO_CAN_PMOD on the carrier board and the
+ * corresponding macro SW_GPIO8_CAN0_STB/SW_GPIO8_CAN0_STB on the board DTS:
+ *
+ * SW_GPIO8_CAN0_STB:
+ *     0 - Connect to GPIO8 PMOD (default)
+ *     1 - Connect to CAN0 transceiver STB pin
+ *
+ * SW_GPIO9_CAN1_STB:
+ *     0 - Connect to GPIO9 PMOD (default)
+ *     1 - Connect to CAN1 transceiver STB pin
  */
 
 / {
@@ -27,6 +38,20 @@
                serial3 = &scif0;
                mmc1 = &sdhi1;
        };
+
+       can_transceiver0: can-phy0 {
+               compatible = "ti,tcan1042";
+               #phy-cells = <0>;
+               max-bitrate = <8000000>;
+               status = "disabled";
+       };
+
+       can_transceiver1: can-phy1 {
+               compatible = "ti,tcan1042";
+               #phy-cells = <0>;
+               max-bitrate = <8000000>;
+               status = "disabled";
+       };
 };
 
 &canfd {