# SPDX-License-Identifier: GPL-2.0-only
#
# SPI driver configuration
#
menuconfig SPI
bool "SPI support"
depends on HAS_IOMEM
help
The "Serial Peripheral Interface" is a low level synchronous
protocol. Chips that support SPI can have data transfer rates
up to several tens of Mbit/sec. Chips are addressed with a
controller and a chipselect. Most SPI slaves don't support
dynamic device discovery; some are even write-only or read-only.
SPI is widely used by microcontrollers to talk with sensors,
eeprom and flash memory, codecs and various other controller
chips, analog to digital (and d-to-a) converters, and more.
MMC and SD cards can be accessed using SPI protocol; and for
DataFlash cards used in MMC sockets, SPI must always be used.
SPI is one of a family of similar protocols using a four wire
interface (select, clock, data in, data out) including Microwire
(half duplex), SSP, SSI, and PSP. This driver framework should
work with most such devices and controllers.
if SPI
config SPI_DEBUG
bool "Debug support for SPI drivers"
depends on DEBUG_KERNEL
help
Say "yes" to enable debug messaging (like dev_dbg and pr_debug),
sysfs, and debugfs support in SPI controller and protocol drivers.
#
# MASTER side ... talking to discrete SPI slave chips including microcontrollers
#
config SPI_MASTER
# bool "SPI Master Support"
bool
default SPI
help
If your system has an master-capable SPI controller (which
provides the clock and chipselect), you can enable that
controller and the protocol drivers for the SPI slave chips
that are connected.
if SPI_MASTER
config SPI_MEM
bool "SPI memory extension"
help
Enable this option if you want to enable the SPI memory extension.
This extension is meant to simplify interaction with SPI memories
by providing a high-level interface to send memory-like commands.
config SPI_OFFLOAD
bool
comment "SPI Master Controller Drivers"
config SPI_AIROHA_SNFI
tristate "Airoha SPI NAND Flash Interface"
depends on ARCH_AIROHA || COMPILE_TEST
depends on SPI_MASTER
select REGMAP_MMIO
help
This enables support for SPI-NAND mode on the Airoha NAND
Flash Interface found on Airoha ARM SoCs. This controller
is implemented as a SPI-MEM controller.
config SPI_ALTERA
tristate "Altera SPI Controller platform driver"
select SPI_ALTERA_CORE
select REGMAP_MMIO
help
This is the driver for the Altera SPI Controller.
config SPI_ALTERA_CORE
tristate "Altera SPI Controller core code" if COMPILE_TEST
select REGMAP
help
"The core code for the Altera SPI Controller"
config SPI_ALTERA_DFL
tristate "DFL bus driver for Altera SPI Controller"
depends on FPGA_DFL
select SPI_ALTERA_CORE
help
This is a Device Feature List (DFL) bus driver for the
Altera SPI master controller. The SPI master is connected
to a SPI slave to Avalon bridge in a Intel MAX BMC.
config SPI_AMLOGIC_SPIFC_A1
tristate "Amlogic A1 SPIFC controller"
depends on ARCH_MESON
