boards: nucleo_h723zg: Enable SPI

Enable SPI on nucleo_h723zg board

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

boards/arm/nucleo_h723zg/arduino_r3_connector.dtsi

@@ -35,5 +35,5 @@
 };
 
 arduino_i2c: &i2c1 {};
-
+arduino_spi: &spi1 {};
 arduino_serial: &uart8 {};

boards/arm/nucleo_h723zg/doc/index.rst

@@ -107,6 +107,8 @@ features:
 +-------------+------------+-------------------------------------+
 | I2C         | on-chip    | i2c                                 |
 +-------------+------------+-------------------------------------+
+| SPI         | on-chip    | spi                                 |
++-------------+------------+-------------------------------------+
 | PWM         | on-chip    | pwm                                 |
 +-------------+------------+-------------------------------------+
 | ETHERNET    | on-chip    | ethernet                            |
@@ -135,6 +137,7 @@ and a ST morpho connector. Board is configured as follows:
 - LD2 : PB7
 - LD3 : PB14
 - I2C : PB8, PB9
+- SPI1 NSS/SCK/MISO/MOSI : PD14PA5/PA6/PB5 (Arduino SPI)
 
 System Clock
 ------------

boards/arm/nucleo_h723zg/nucleo_h723zg.dts

@@ -115,6 +115,13 @@
 	status = "okay";
 };
 
+&spi1 {
+	status = "okay";
+	pinctrl-0 = <&spi1_sck_pa5 &spi1_miso_pa6 &spi1_mosi_pb5>;
+	pinctrl-names = "default";
+	cs-gpios = <&gpiod 14 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+};
+
 &i2c1 {
 	pinctrl-0 = <&i2c1_scl_pb8 &i2c1_sda_pb9>;
 	pinctrl-names = "default";

boards/arm/nucleo_h723zg/nucleo_h723zg.yaml

@@ -11,10 +11,12 @@ flash: 1024
 supported:
   - arduino_gpio
   - arduino_i2c
+  - arduino_spi
   - uart
   - gpio
   - counter
   - i2c
   - pwm
+  - spi
   - netif:eth
   - backup_sram

tests/drivers/spi/spi_loopback/boards/nucleo_h723zg.overlay

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2021 STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* Set div-q to get test clk freq into acceptable SPI freq range */
+&pll {
+	/delete-property/ div-q;
+	div-q = <8>;
+};
+
+/* Define PLL1_Q as SPI1 kernel clock source */
+&spi1 {
+	/delete-property/ clocks;
+	clocks = <&rcc STM32_CLOCK_BUS_APB2 0x00001000>,
+		 <&rcc STM32_SRC_PLL1_Q SPI123_SEL(0)>;
+	clock-names = "reg", "kernel";
+};