driver: flash: npcx: introduce npcx flash driver

This CL attempts to implement npcx's flash driver instead of the
original one (npcx spi driver plus spi_nor flash driver).

Signed-off-by: Mulin Chao <mlchao@nuvoton.com>

drivers/flash/CMakeLists.txt

@@ -31,6 +31,8 @@ zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_SAM flash_sam.c)
 zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_NIOS2_QSPI soc_flash_nios2_qspi.c)
 zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_GECKO flash_gecko.c)
 zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_RV32M1 soc_flash_rv32m1.c)
+zephyr_library_sources_ifdef(CONFIG_FLASH_NPCX_FIU_QSPI flash_npcx_fiu_qspi.c)
+zephyr_library_sources_ifdef(CONFIG_FLASH_NPCX_FIU_NOR flash_npcx_fiu_nor.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_STM32_QSPI flash_stm32_qspi.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_STM32_OSPI flash_stm32_ospi.c)
 zephyr_library_sources_ifdef(CONFIG_FLASH_MCUX_FLEXSPI_MX25UM51345G flash_mcux_flexspi_mx25um51345g.c)

drivers/flash/Kconfig

@@ -118,6 +118,8 @@ source "drivers/flash/Kconfig.mcux"
 
 source "drivers/flash/Kconfig.nios2_qspi"
 
+source "drivers/flash/Kconfig.npcx_fiu"
+
 source "drivers/flash/Kconfig.gecko"
 
 source "drivers/flash/Kconfig.nor"

drivers/flash/Kconfig.npcx_fiu

@@ -0,0 +1,34 @@
+# NPCX Flash driver configuration options
+
+# Copyright (c) 2023 Nuvoton Technology Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+config FLASH_NPCX_FIU_QSPI
+	bool "Nuvoton NPCX QSPI Bus Flash driver"
+	default y
+	depends on DT_HAS_NUVOTON_NPCX_FIU_QSPI_ENABLED
+	help
+	  This option enables the QSPI Bus Flash driver for NPCX family of
+	  processors.
+
+config FLASH_NPCX_FIU_NOR
+	bool "Nuvoton NPCX embedded controller (EC) QSPI NOR Flash driver"
+	default y
+	depends on DT_HAS_NUVOTON_NPCX_FIU_NOR_ENABLED
+	depends on FLASH_NPCX_FIU_QSPI
+	select FLASH_HAS_DRIVER_ENABLED
+	select FLASH_HAS_PAGE_LAYOUT
+	select FLASH_JESD216
+	select FLASH_HAS_EX_OP
+	help
+	  This option enables the QSPI NOR Flash driver for NPCX family of
+	  processors.
+
+config FLASH_NPCX_FIU_NOR_INIT
+	bool "QSPI NOR flash feature during driver initialization"
+	default y
+	depends on FLASH_NPCX_FIU_NOR
+	help
+	  This option enables the QSPI NOR Flash features such as Quad-Enable,
+	  4-byte address support and so on during driver initialization. Disable
+	  it if QSPI NOR devices are not ready during driver initialization.