MSPI_DW DMA and Async support

doc/hardware/peripherals/mspi.rst

@@ -100,10 +100,12 @@ whether to support scatter IO and callback management. The controller can determ
 which user callback to trigger based on :c:enum:`mspi_bus_event_cb_mask` upon completion
 of each async/sync transfer if the callback had been registered using
 :c:func:`mspi_register_callback`. Or not to trigger any callback at all with
-:c:enum:`MSPI_BUS_NO_CB` even if the callbacks are already registered.
-In which case that a controller supports hardware command queue, user could take full
-advantage of the hardware performance if scatter IO and callback management are supported
-by the driver implementation.
+:c:enum:`MSPI_BUS_NO_CB` even if the callbacks are already registered. If the implemented
+driver support it, the API supports :c:enum:`MSPI_BUS_XFER_COMPLETE_CB` to signal when a
+transfer finishes and :c:enum:`MSPI_BUS_TIMEOUT_CB` to signal when a transfer or request
+has timed-out. In which case that a controller supports hardware command queue, user could
+take full advantage of the hardware performance if scatter IO and callback management are
+supported by the driver implementation.
 
 Device Tree
 ===========
@@ -192,6 +194,7 @@ Related configuration options:
 * :kconfig:option:`CONFIG_MSPI_TIMING`
 * :kconfig:option:`CONFIG_MSPI_INIT_PRIORITY`
 * :kconfig:option:`CONFIG_MSPI_COMPLETION_TIMEOUT_TOLERANCE`
+* :kconfig:option:`CONFIG_MSPI_DMA`
 
 API Reference
 *************

drivers/mspi/Kconfig

@@ -55,6 +55,12 @@ config MSPI_TIMING
 	  Enables mspi_timing_config calls in device drivers for those
 	  controllers that need this to proper function at high frequencies.
 
+config MSPI_DMA
+	bool "DMA support"
+	help
+	  Enables DMA capabilities, depending on the driver and hardware it
+	  runs on.
+
 module = MSPI
 module-str = mspi
 source "subsys/logging/Kconfig.template.log_config"

drivers/mspi/Kconfig.dw

@@ -7,13 +7,13 @@ config MSPI_DW
 	default y
 	depends on DT_HAS_SNPS_DESIGNWARE_SSI_ENABLED
 	select PINCTRL if $(dt_compat_any_has_prop,$(DT_COMPAT_SNPS_DESIGNWARE_SSI),pinctrl-0)
-	imply MSPI_XIP
 	imply MSPI_TIMING
 
 if MSPI_DW
 
 config MSPI_DW_HANDLE_FIFOS_IN_SYSTEM_WORKQUEUE
 	bool "Handle FIFO in system workqueue"
+	depends on MULTITHREADING
 	help
 	  When the driver does not use DMA for transferring data to/from the
 	  SSI FIFOs, handling of those may take a significant amount of time.