drivers: flash: Add support for flash driver on EK-RA8D1

Initial commit to support flash driver on EK-RA8D1

Signed-off-by: Quy Tran <quy.tran.pz@renesas.com>

boards/renesas/ek_ra8d1/doc/index.rst

@@ -102,6 +102,8 @@ The below features are currently supported on Zephyr OS for EK-RA8D1 board:
 +--------------+------------+------------------+
 | SPI          | on-chip    | spi              |
 +--------------+------------+------------------+
+| FLASH        | on-chip    | flash            |
++--------------+------------+------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/ek_ra8d1/ek_ra8d1.dts

@@ -20,6 +20,7 @@
 		zephyr,console = &uart9;
 		zephyr,shell-uart = &uart9;
 		zephyr,entropy = &trng;
+		zephyr,flash-controller = &flash1;
 	};
 
 	leds {
@@ -110,3 +111,16 @@
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+&flash1 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		storage_partition: partition@0 {
+			label = "storage";
+			reg = <0X0 DT_SIZE_K(12)>;
+		};
+	};
+};

boards/renesas/ek_ra8d1/ek_ra8d1_defconfig

@@ -16,3 +16,5 @@ CONFIG_CLOCK_CONTROL=y
 
 CONFIG_BUILD_OUTPUT_HEX=y
 CONFIG_BUILD_NO_GAP_FILL=y
+
+CONFIG_FLASH=y

drivers/flash/Kconfig.renesas_ra

@@ -11,7 +11,7 @@ config RA_FLASH_HP
 	select FLASH_PAGE_LAYOUT
 	select FLASH_HAS_PAGE_LAYOUT
 	select FLASH_HAS_EXPLICIT_ERASE
-	select FLASH_HAS_EX_OP if(SOC_SERIES_RA8M1)
+	select FLASH_HAS_EX_OP if(SOC_SERIES_RA8M1 || SOC_SERIES_RA8D1)
 	select USE_RA_FSP_FLASH_HP
 	help
 	  Enable flash driver for RA series

drivers/flash/flash_hp_ra.h

@@ -33,7 +33,7 @@
 #define FLASH_HP_CF_BLOCK_32KB_DUAL_LOW_START  (8)
 #define FLASH_HP_CF_BLOCK_32KB_DUAL_HIGH_START (78)
 
-#if defined(CONFIG_SOC_R7FA8M1AHECBD)
+#if defined(CONFIG_SOC_R7FA8M1AHECBD) || defined(CONFIG_SOC_R7FA8D1BHECBD)
 #define FLASH_RESERVED_AREA_NUM              (33)
 #define FLASH_HP_CF_BLOCK_32KB_LINEAR_END    (68)
 #define FLASH_HP_CF_BLOCK_32KB_DUAL_LOW_END  (36)

dts/arm/renesas/ra/ra8/r7fa8d1bhecbd.dtsi

@@ -8,10 +8,21 @@
 
 / {
 	soc {
-		flash-controller@407fe000 {
+		flash-controller@40100000 {
 			flash0: flash@2000000 {
-				compatible = "soc-nv-flash";
-				reg = <0x02000000 DT_SIZE_M(2)>;
+				compatible = "renesas,ra-nv-flash";
+				reg = <0x02000000 DT_SIZE_K(2016)>;
+				write-block-size = <128>;
+				erase-block-size = <8192>;
+				renesas,programming-enable;
+			};
+
+			flash1: flash@27000000 {
+				compatible = "renesas,ra-nv-flash";
+				reg = <0x27000000 DT_SIZE_K(12)>;
+				write-block-size = <4>;
+				erase-block-size = <64>;
+				renesas,programming-enable;
 			};
 		};
 	};

soc/renesas/ra/ra8d1/Kconfig.defconfig

@@ -9,4 +9,8 @@ config NUM_IRQS
 config PINCTRL
 	default y
 
+# Set to the minimal size of data which can be written.
+config FLASH_FILL_BUFFER_SIZE
+	default 128
+
 endif # SOC_SERIES_RA8D1

soc/renesas/ra/ra8d1/Kconfig.soc

@@ -19,3 +19,9 @@ config SOC_R7FA8D1BHECBD
 
 config SOC
 	default "r7fa8d1bhecbd" if SOC_R7FA8D1BHECBD
+
+config DUAL_BANK_MODE
+	bool "Dual bank mode"
+	default n
+	help
+	  Enable dual bank mode

tests/drivers/flash/common/boards/ek_ra8d1.overlay

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/delete-node/ &storage_partition;
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* Set the 2 last block of storage. */
+		storage_partition: partition@1E8000 {
+			label = "storage";
+			reg = <0x1E8000 DT_SIZE_K(64)>;
+		};
+	};
+};