drivers: mspi: Add shim driver for sQSPI

Add a translation layer that allows using the sQSPI soft peripheral
through the Zephyr MSPI API.
Also modify the manifest to pull in related changes required in
sdk-zephyr.

Signed-off-by: Andrzej Głąbek <[email protected]>

Author: anangl

drivers/mspi/CMakeLists.txt

@@ -6,3 +6,27 @@
 
 zephyr_library_amend()
 zephyr_library_sources_ifdef(CONFIG_MSPI_NRFE mspi_nrfe.c)
+
+if(CONFIG_MSPI_NRF_SQSPI)
+  set(SP_DIR ${ZEPHYR_NRFXLIB_MODULE_DIR}/softperipheral)
+  set(SQSPI_DIR ${SP_DIR}/sQSPI)
+
+  zephyr_library_compile_definitions(
+    NRFX_QSPI2_ENABLED=1
+    NRFX_QSPI2_MAX_NUM_DATA_LINES=4
+  )
+  zephyr_library_include_directories(
+    ${SP_DIR}/include
+    ${SQSPI_DIR}/include
+  )
+  zephyr_library_include_directories_ifdef(CONFIG_SOC_NRF54L15
+    ${SQSPI_DIR}/include/nrf54l15
+  )
+  zephyr_library_include_directories_ifdef(CONFIG_SOC_NRF54H20
+    ${SQSPI_DIR}/include/nrf54h20
+  )
+  zephyr_library_sources(
+    ${SQSPI_DIR}/src/nrfx_qspi2.c
+    mspi_sqspi.c
+  )
+endif()

drivers/mspi/Kconfig

@@ -4,5 +4,6 @@
 if MSPI
 
 rsource "Kconfig.nrfe"
+rsource "Kconfig.sqspi"
 
 endif # MSPI

drivers/mspi/Kconfig.sqspi

@@ -0,0 +1,9 @@
+# Copyright (c) 2025 Nordic Semiconductor ASA
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+config MSPI_NRF_SQSPI
+	bool "sQSPI driver"
+	default y
+	depends on DT_HAS_NORDIC_NRF_SQSPI_ENABLED
+	select PINCTRL
+	select GPIO if $(dt_compat_any_has_prop,$(DT_COMPAT_NORDIC_NRF_SQSPI),ce-gpios)