drivers: mspi: import MSPI driver from upstream Zephyr

Import MSPI driver introduced in
zephyrproject-rtos/zephyr#80042.

The driver has been lightly modified to add the ability to set the
RX_DELAY register.

Once we resynchronize with upstream Zephyr, this change can be turned
into a patch to the driver.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

drivers/CMakeLists.txt

@@ -4,6 +4,7 @@
 add_subdirectory_ifdef(CONFIG_FLASH flash)
 add_subdirectory_ifdef(CONFIG_I2C i2c)
 add_subdirectory_ifdef(CONFIG_JTAG jtag)
+add_subdirectory_ifdef(CONFIG_MSPI mspi)
 add_subdirectory_ifdef(CONFIG_RESET reset)
 add_subdirectory_ifdef(CONFIG_SENSOR sensor)
 add_subdirectory_ifdef(CONFIG_SERIAL serial)

drivers/Kconfig

@@ -7,6 +7,7 @@ menu "Device Drivers"
 rsource "flash/Kconfig"
 rsource "i2c/Kconfig"
 rsource "jtag/Kconfig"
+rsource "mspi/Kconfig"
 rsource "reset/Kconfig"
 rsource "sensor/Kconfig"
 rsource "serial/Kconfig"

drivers/mspi/CMakeLists.txt

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library_amend()
+
+# zephyr-keep-sorted-start
+zephyr_library_sources_ifdef(CONFIG_MSPI_DW mspi_dw.c)
+# zephyr-keep-sorted-stop

drivers/mspi/Kconfig

@@ -0,0 +1,14 @@
+#  Copyright (c) 2025 Tenstorrent AI ULC
+#  SPDX-License-Identifier: Apache-2.0
+
+if MSPI
+
+menu "MSPI drivers"
+
+# zephyr-keep-sorted-start
+rsource "Kconfig.dw"
+# zephyr-keep-sorted-stop
+
+endmenu
+
+endif

drivers/mspi/Kconfig.dw

@@ -0,0 +1,9 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config MSPI_DW
+	bool "DesignWare SSI controller driver"
+	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