boards: arm: stm32f401re nucleo board revision C01

Define a HW revision of nucleo_f401re  (MB1136)
rev C-01 corresponds to a board, configured as HSE not used
then forcing the HSI for the DTS of that board.
rev C-02 (or higher) corresponds to a board, configured to use
ST-LINK MCO as the clock input (HSE bypass).
To build with "west build -b nucleo_f401re@C01 samples/hello_world"
The default HW revision is C-02  (for any board rev. C-02 and above)

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

boards/arm/nucleo_f401re/doc/index.rst

@@ -127,7 +127,8 @@ System Clock
 
 Nucleo F401RE System Clock could be driven by internal or external oscillator,
 as well as main PLL clock. By default System clock is driven by PLL clock at 84MHz,
-driven by 8MHz high speed external clock.
+- driven by 8MHz high speed external clock (HSE) for board revision C02 and above
+- driven by 16MHz high speed internal clock (HSI) for board revision C01
 
 Serial Port
 ===========

boards/arm/nucleo_f401re/nucleo_f401re_C01.conf

@@ -0,0 +1,2 @@
+# Copyright (c) 2023 STMicroelecronics
+# SPDX-License-Identifier: Apache-2.0

boards/arm/nucleo_f401re/nucleo_f401re_C01.overlay

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2023, STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&clk_hse {
+	/* HSE not used on this board revision */
+	status = "disabled";
+};
+
+&clk_hsi {
+	/* use HSI */
+	status = "okay";
+};
+
+&pll {
+	/delete-property/ div-m;
+	div-m = <16>;
+	/delete-property/ clocks;
+	clocks = <&clk_hsi>;
+};

boards/arm/nucleo_f401re/nucleo_f401re_C01.yaml

@@ -0,0 +1,21 @@
+identifier: nucleo_f401re@C01
+name: ST Nucleo F401RE rev C-01
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - arduino_gpio
+  - arduino_i2c
+  - arduino_spi
+  - pwm
+  - counter
+  - gpio
+  - i2c
+  - spi
+  - adc
+  - watchdog
+ram: 96
+flash: 512

boards/arm/nucleo_f401re/nucleo_f401re_C02.conf

@@ -0,0 +1,2 @@
+# Copyright (c) 2023 STMicroelecronics
+# SPDX-License-Identifier: Apache-2.0

boards/arm/nucleo_f401re/revision.cmake

@@ -0,0 +1,4 @@
+board_check_revision(
+        FORMAT ALPHANUM
+        DEFAULT_REVISION C02
+)