drivers/mtd/spi-nor/Kconfig

# SPDX-License-Identifier: GPL-2.0-only
menuconfig MTD_SPI_NOR
	tristate "SPI-NOR device support"
	depends on MTD
	depends on MTD && SPI_MASTER
	select SPI_MEM
	help
	  This is the framework for the SPI NOR which can be used by the SPI
	  device drivers and the SPI-NOR device driver.

if MTD_SPI_NOR

config MTD_SPI_NOR_USE_4K_SECTORS
	bool "Use small 4096 B erase sectors"
	default y
	help
	  Many flash memories support erasing small (4096 B) sectors. Depending
	  on the usage this feature may provide performance gain in comparison
	  to erasing whole blocks (32/64 KiB).
	  Changing a small part of the flash's contents is usually faster with
	  small sectors. On the other hand erasing should be faster when using
	  64 KiB block instead of 16 × 4 KiB sectors.

	  Please note that some tools/drivers/filesystems may not work with
	  4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).
choice
	prompt "Software write protection at boot"
	default MTD_SPI_NOR_SWP_DISABLE_ON_VOLATILE

config MTD_SPI_NOR_SWP_DISABLE
	bool "Disable SWP on any flashes (legacy behavior)"
	help
	  This option disables the software write protection on any SPI
	  flashes at boot-up.

	  Depending on the flash chip this either clears the block protection
	  bits or does a "Global Unprotect" command.

	  Don't use this if you intent to use the software write protection
	  of your SPI flash. This is only to keep backwards compatibility.

config MTD_SPI_NOR_SWP_DISABLE_ON_VOLATILE
	bool "Disable SWP on flashes w/ volatile protection bits"
	help
	  Some SPI flashes have volatile block protection bits, ie. after a
	  power-up or a reset the flash is software write protected by
	  default.

	  This option disables the software write protection for these kind
	  of flashes while keeping it enabled for any other SPI flashes
	  which have non-volatile write protection bits.

	  If the software write protection will be disabled depending on
	  the flash either the block protection bits are cleared or a
	  "Global Unprotect" command is issued.

	  If you are unsure, select this option.

config MTD_SPI_NOR_SWP_KEEP
	bool "Keep software write protection as is"
	help
	  If you select this option the software write protection of any
	  SPI flashes will not be changed. If your flash is software write
	  protected or will be automatically software write protected after
	  power-up you have to manually unlock it before you are able to
	  write to it.

endchoice

config SPI_ASPEED_SMC
	tristate "Aspeed flash controllers in SPI mode"
	depends on ARCH_ASPEED || COMPILE_TEST
	depends on HAS_IOMEM && OF
	help
	  This enables support for the Firmware Memory controller (FMC)
	  in the Aspeed AST2500/AST2400 SoCs when attached to SPI NOR chips,
	  and support for the SPI flash memory controller (SPI) for
	  the host firmware. The implementation only supports SPI NOR.

config SPI_CADENCE_QUADSPI
	tristate "Cadence Quad SPI controller"
	depends on OF && (ARM || ARM64 || COMPILE_TEST)
	help
	  Enable support for the Cadence Quad SPI Flash controller.

	  Cadence QSPI is a specialized controller for connecting an SPI
	  Flash over 1/2/4-bit wide bus. Enable this option if you have a
	  device with a Cadence QSPI controller and want to access the
	  Flash as an MTD device.

config SPI_HISI_SFC
	tristate "Hisilicon SPI-NOR Flash Controller(SFC)"
	depends on ARCH_HISI || COMPILE_TEST
	depends on HAS_IOMEM
	help
	  This enables support for hisilicon SPI-NOR flash controller.

config SPI_MTK_QUADSPI
	tristate "MediaTek Quad SPI controller"
	depends on HAS_IOMEM
	help
	  This enables support for the Quad SPI controller in master mode.
	  This controller does not support generic SPI. It only supports
	  SPI NOR.

config SPI_NXP_SPIFI
	tristate "NXP SPI Flash Interface (SPIFI)"
	depends on OF && (ARCH_LPC18XX || COMPILE_TEST)
	depends on HAS_IOMEM
	help
	  Enable support for the NXP LPC SPI Flash Interface controller.

	  SPIFI is a specialized controller for connecting serial SPI
	  Flash. Enable this option if you have a device with a SPIFI
	  controller and want to access the Flash as a mtd device.

config SPI_INTEL_SPI
	tristate

config SPI_INTEL_SPI_PCI
	tristate "Intel PCH/PCU SPI flash PCI driver (DANGEROUS)"
	depends on X86 && PCI
	select SPI_INTEL_SPI
	help
	  This enables PCI support for the Intel PCH/PCU SPI controller in
	  master mode. This controller is present in modern Intel hardware
	  and is used to hold BIOS and other persistent settings. Using
	  this driver it is possible to upgrade BIOS directly from Linux.

	  Say N here unless you know what you are doing. Overwriting the
	  SPI flash may render the system unbootable.

	  To compile this driver as a module, choose M here: the module
	  will be called intel-spi-pci.

config SPI_INTEL_SPI_PLATFORM
	tristate "Intel PCH/PCU SPI flash platform driver (DANGEROUS)"
	depends on X86
	select SPI_INTEL_SPI
	help
	  This enables platform support for the Intel PCH/PCU SPI
	  controller in master mode. This controller is present in modern
	  Intel hardware and is used to hold BIOS and other persistent
	  settings. Using this driver it is possible to upgrade BIOS
	  directly from Linux.

	  Say N here unless you know what you are doing. Overwriting the
	  SPI flash may render the system unbootable.

	  To compile this driver as a module, choose M here: the module
	  will be called intel-spi-platform.

endif # MTD_SPI_NOR