boards: arm: st: nucleo_h7s3l8: Add fdcan1

Enable support for FDCAN1 on nucleo_h7s3l8 board. PD0 (RX) and PD1 (TX)
are used for interfacing an external CAN transceiver according to the
breakout connector description in the board's schematic.

Signed-off-by: Thomas Decker <[email protected]>

Author: TD-JBL

boards/st/nucleo_h7s3l8/doc/index.rst

@@ -161,6 +161,7 @@ and a ST morpho connector. Board is configured as follows:
 - LD3 : PB7
 - I2C : PB8, PB9
 - SPI1 NSS/SCK/MISO/MOSI : PD14PA5/PA6/PB5 (Arduino SPI)
+- FDCAN1 RX/TX : PD0, PD1
 
 System Clock
 ------------
@@ -181,6 +182,13 @@ Backup SRAM
 In order to test backup SRAM you may want to disconnect VBAT from VDD. You can
 do it by removing ``SB13`` jumper on the back side of the board.
 
+FDCAN
+=====
+
+The Nucleo H7S3L8 board does not have any onboard CAN transceiver. In order to
+use the FDCAN bus on this board, an external CAN bus transceiver must be
+connected to pins PD0 (RX) and PD1 (TX).
+
 Programming and Debugging
 *************************
 

boards/st/nucleo_h7s3l8/nucleo_h7s3l8.dts

@@ -20,6 +20,7 @@
 		zephyr,dtcm = &dtcm;
 		zephyr,sram = &sram0;
 		zephyr,flash = &flash0;
+		zephyr,canbus = &fdcan1;
 	};
 
 	leds: leds {
@@ -166,6 +167,14 @@
 	clock-frequency = <I2C_BITRATE_FAST>;
 };
 
+&fdcan1 {
+	pinctrl-0 = <&fdcan1_rx_pd0 &fdcan1_tx_pd1>;
+	pinctrl-names = "default";
+	clocks = <&rcc STM32_CLOCK(APB1_2, 8)>,
+		 <&rcc STM32_SRC_HSE FDCAN_SEL(0)>;
+	status = "okay";
+};
+
 &flash0 {
 	partitions {
 		compatible = "fixed-partitions";

boards/st/nucleo_h7s3l8/nucleo_h7s3l8.yaml

@@ -13,4 +13,6 @@ supported:
   - entropy
   - adc
   - octospi
+  - can
+  - canfd
 vendor: st