boards: adafruit_feather_stm32f405: Add SPI flash

Added SPI flash definition on SPI1.

Signed-off-by: Richard Osterloh <[email protected]>

Author: rosterloh

boards/arm/adafruit_feather_stm32f405/Kconfig.defconfig

@@ -16,6 +16,10 @@ config I2C_1
 	default y
 	depends on I2C
 
+config SPI_1
+	default y
+	depends on SPI
+
 config SPI_2
 	default y
 	depends on SPI

boards/arm/adafruit_feather_stm32f405/adafruit_feather_stm32f405.dts

@@ -42,6 +42,23 @@
 	clock-frequency = <I2C_BITRATE_FAST>;
 };
 
+&spi1 {
+	status = "okay";
+	cs-gpios = <&gpioa 15 GPIO_ACTIVE_LOW>;
+	gd25q16: gd25q16c@0 {
+		compatible = "jedec,spi-nor";
+		label = "GD25Q16C";
+		reg = <0>;
+		spi-max-frequency = <80000000>;
+		size = <0x200000>;
+		has-be32k;
+		has-dpd;
+		t-enter-dpd = <20000>;
+		t-exit-dpd = <100000>;
+		jedec-id = [c8 40 15];
+	};
+};
+
 &spi2 {
 	status = "okay";
 };

boards/arm/adafruit_feather_stm32f405/doc/index.rst

@@ -88,6 +88,9 @@ SPI Port
 The STM32F405 SPI2 peripheral is available on the SCK (PB13), MI
 (PB14) and MO (PB15) pins.
 
+SPI1 uses SCK (PB3), MI (PB4), MO (PB5) and SS (PA15) pins and is
+dedicated to the 2 MB SPI Flash chip.
+
 Programming and Debugging
 *************************
 

boards/arm/adafruit_feather_stm32f405/pinmux.c

@@ -22,6 +22,16 @@ static const struct pin_config pinconf[] = {
 	{STM32_PIN_PB6, STM32F4_PINMUX_FUNC_PB6_I2C1_SCL},
 	{STM32_PIN_PB7, STM32F4_PINMUX_FUNC_PB7_I2C1_SDA},
 #endif /* CONFIG_I2C_1 */
+#ifdef CONFIG_SPI_1
+#ifdef CONFIG_SPI_STM32_USE_HW_SS
+	{STM32_PIN_PA15, STM32F4_PINMUX_FUNC_PA15_SPI1_NSS |
+			 STM32_OSPEEDR_VERY_HIGH_SPEED},
+#endif /* CONFIG_SPI_STM32_USE_HW_SS */
+	{STM32_PIN_PB3, STM32F4_PINMUX_FUNC_PB3_SPI1_SCK |
+			STM32_OSPEEDR_VERY_HIGH_SPEED},
+	{STM32_PIN_PB4, STM32F4_PINMUX_FUNC_PA6_SPI1_MISO},
+	{STM32_PIN_PB5, STM32F4_PINMUX_FUNC_PA7_SPI1_MOSI},
+#endif /* CONFIG_SPI_1 */
 #ifdef CONFIG_SPI_2
 	{STM32_PIN_PB13, STM32F4_PINMUX_FUNC_PB13_SPI2_SCK},
 	{STM32_PIN_PB14, STM32F4_PINMUX_FUNC_PB14_SPI2_MISO},

samples/drivers/spi_flash/boards/adafruit_feather_stm32f405.conf

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2020 Richard Osterloh <[email protected]>
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_SPI_NOR=y

samples/drivers/spi_flash/src/main.c

@@ -24,7 +24,11 @@
 #error Unsupported flash driver
 #endif
 
+#if defined(CONFIG_BOARD_ADAFRUIT_FEATHER_STM32F405)
+#define FLASH_TEST_REGION_OFFSET 0xf000
+#else
 #define FLASH_TEST_REGION_OFFSET 0xff000
+#endif
 #define FLASH_SECTOR_SIZE        4096
 
 void main(void)