drivers: flash: Initial support OSPI flash driver on RA8 boards

Support OSPI flash driver on EK-RA8M1 and EK-RA8D1 with ospi_b
and S28HL512T flash.

Signed-off-by: Tri Nguyen <[email protected]>
Signed-off-by: Thao Luong <[email protected]>

Author: Tri Nguyen

drivers/flash/CMakeLists.txt

@@ -37,6 +37,7 @@ zephyr_library_sources_ifdef(CONFIG_FLASH_MSPI_EMUL_DEVICE flash_mspi_emul_devic
 zephyr_library_sources_ifdef(CONFIG_FLASH_MSPI_NOR flash_mspi_nor.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_NPCX_FIU_NOR flash_npcx_fiu_nor.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_NPCX_FIU_QSPI flash_npcx_fiu_qspi.c)
+zephyr_library_sources_ifdef(CONFIG_FLASH_RENESAS_RA_OSPI_B flash_renesas_ra_ospi_b.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_RPI_PICO flash_rpi_pico.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_STM32_OSPI flash_stm32_ospi.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_STM32_QSPI flash_stm32_qspi.c)

drivers/flash/Kconfig

@@ -191,6 +191,7 @@ source "drivers/flash/Kconfig.numaker"
 source "drivers/flash/Kconfig.numaker_rmc"
 source "drivers/flash/Kconfig.nxp_s32"
 source "drivers/flash/Kconfig.renesas_ra"
+source "drivers/flash/Kconfig.renesas_ra_ospi"
 source "drivers/flash/Kconfig.rpi_pico"
 source "drivers/flash/Kconfig.rts5912"
 source "drivers/flash/Kconfig.rv32m1"

drivers/flash/Kconfig.renesas_ra_ospi

@@ -0,0 +1,18 @@
+# Renesas RA Family
+
+# Copyright (c) 2024-2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config FLASH_RENESAS_RA_OSPI_B
+	bool "Renesas RA Octal-SPI driver"
+	default y
+	depends on DT_HAS_RENESAS_RA_OSPI_B_NOR_ENABLED
+	select FLASH_HAS_DRIVER_ENABLED
+	select FLASH_HAS_PAGE_LAYOUT
+	select FLASH_HAS_EXPLICIT_ERASE
+	select USE_RA_FSP_OSPI_B_NOR_FLASH
+	select FLASH_JESD216
+	select FLASH_HAS_EX_OP
+	select PINCTRL
+	help
+	  Enable Octal-SPI Nor flash driver for RA series