#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#

if SPI

config SPI_SLAVE
	bool "SPI slave"
	default n
	---help---
		Enable support for SPI slave features

if SPI_SLAVE

config SPI_SLAVE_DMA
	bool "SPI slave DMA"
	default n
	depends on ARCH_DMA && EXPERIMENTAL
	---help---
		Enable support for DMA data transfers (not yet implemented).

endif

config SPI_EXCHANGE
	bool "SPI exchange"
	default y
	---help---
		Driver supports a single exchange method (vs a recvblock() and
		sndblock() methods).

config SPI_CMDDATA
	bool "SPI CMD/DATA"
	default n
	---help---
		Devices on the SPI bus require out-of-band support to distinguish
		command transfers from data transfers.  Such devices will often support
		either 9-bit SPI (yech) or 8-bit SPI and a GPIO output that selects
		between command and data.

config SPI_CALLBACK
	bool "Media change callbacks"
	default y if MMCSD_SPI
	default n if !MMCSD_SPI
	---help---
		Support the callback method in the SPI interface.  This will allow
		the SPI-based MMC/SD driver to get a notification of changes in the
		card status when an SD card is inserted or removed.

config SPI_HWFEATURES
	bool
	default n
	---help---
		Selected only if a specific H/W feature is selected.  This is
		basically the OR of any specific hardware feature and eanbles
		the SPI hwfeatures() interface method.

config SPI_CRCGENERATION
	bool
	default n
	select SPI_HWFEATURES
	---help---
		Selected by MCU Kconfig logic if implementation supports automatic
		generation of SPI CRCs.  Enables the HWFEAT_CRCGENERATION option
		as well as the hwfeartures() interface method.

config SPI_CS_CONTROL
	bool "SPI CS Behavior Control"
	default n
	select SPI_HWFEATURES
	---help---
		Enables possibilities to define the behavior of CS.
		Also enables the hwfeatures() interface method.

config SPI_CS_DELAY_CONTROL
	bool "SPI CS Delay Control"
	default n
	---help---
		Enables possibilities to define the SPI-ChipSelect-Delays like
		time between ChipSelect assertion and first Data-Bit, the time
		between the last Data-Bit and the de-assertion and the minimum
		delay between two ChipSelects.

		This option enables the setdelay() interface method.

config SPI_DRIVER
	bool "SPI character driver"
	default n
	depends on SPI_EXCHANGE
	---help---
		Build in support for a character driver at /dev/spi[N] that may be
		used to perform SPI bus transfers from applications.  The intent of
		this driver is to support SPI testing.  It is not suitable for use
		in any real driver application.

config SPI_BITBANG
	bool "SPI bit-bang device"
	default n
	---help---
		Enable support for a generic SPI bit-bang device.
		See include/nuttx/spi/spi_bitbang.h for further information.

if SPI_BITBANG

config SPI_BITBANG_VARWIDTH
	bool "SPI bit-bang variable width transfers"
	default n
	---help---
		Enable support for a variable data width transfers.  Default: 8-bit
		only.

endif # SPI_BITBANG
endif # SPI