boards: riscv: rv32m1_vega: Add onboard SPI flash

Enable the MX25R32 SPI NOR Flash on the VEGAboard and provide board
config file for the spi_flash sample.

Signed-off-by: Karsten Koenig <[email protected]>

Author: karstenkoenig

boards/riscv/rv32m1_vega/Kconfig.defconfig

@@ -68,4 +68,11 @@ config I2C_3
 
 endif # I2C
 
+if SPI
+
+config SPI_1
+	default y
+
+endif # SPI
+
 endif # BOARD_RV32M1_VEGA

boards/riscv/rv32m1_vega/pinmux.c

@@ -62,6 +62,14 @@ static int rv32m1_vega_pinmux_init(struct device *dev)
 	pinmux_pin_set(porte, 22, PORT_PCR_MUX(kPORT_MuxAsGpio));
 	pinmux_pin_set(porte, 27, PORT_PCR_MUX(kPORT_MuxAsGpio));
 
+#if CONFIG_SPI_1
+	/* LPSPI1 SCK, SIN, SOUT, CS */
+	pinmux_pin_set(portb, 20, PORT_PCR_MUX(kPORT_MuxAlt2));
+	pinmux_pin_set(portb, 21, PORT_PCR_MUX(kPORT_MuxAlt2));
+	pinmux_pin_set(portb, 24, PORT_PCR_MUX(kPORT_MuxAlt2));
+	pinmux_pin_set(portb, 22, PORT_PCR_MUX(kPORT_MuxAlt2));
+#endif
+
 	return 0;
 }
 

boards/riscv/rv32m1_vega/rv32m1_vega.dtsi

@@ -108,3 +108,17 @@ arduino_i2c: &i2c0 {
 		int2-gpios = <&gpioe 22 0>;
 	};
 };
+
+&spi1 {
+	status = "okay";
+	cs-gpios = <&gpiob 22 0>;
+	mx25r32: mx25r3235f@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <80000000>;
+		label = "MX25R32";
+		jedec-id = [c2 28 16];
+		size = <33554432>;
+		has-be32k;
+	};
+};

boards/riscv/rv32m1_vega/rv32m1_vega_ri5cy.yaml

@@ -9,3 +9,4 @@ supported:
   - arduino_gpio
   - arduino_i2c
   - i2c
+  - spi

samples/drivers/spi_flash/boards/rv32m1_vega_ri5cy.conf

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2019 Karsten Koenig <[email protected]>
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_SPI_NOR=y