drivers: flash: Initial support QSPI Flash driver for Renesas RA6

Add QSPI Flash driver supports for Renesas RA6.

Signed-off-by: Tri Nguyen <tri.nguyen.wj@bp.renesas.com>
Signed-off-by: Thao Luong <thao.luong.uw@renesas.com>
Signed-off-by: Khoa Nguyen <khoa.nguyen.xh@renesas.com>

Author: Tri Nguyen

drivers/flash/CMakeLists.txt

@@ -39,6 +39,7 @@ 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_RENESAS_RA_QSPI flash_renesas_ra_qspi.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

@@ -192,6 +192,7 @@ 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.renesas_ra_qspi"
 source "drivers/flash/Kconfig.rpi_pico"
 source "drivers/flash/Kconfig.rts5912"
 source "drivers/flash/Kconfig.rv32m1"

drivers/flash/Kconfig.renesas_ra_qspi

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