spi: zynq: Add Zynq 7000 Quad SPI driver

Add a driver for the Xilinx Zynq 7000 Quad SPI controller. Note that
while the hardware supports legacy SPI, this driver only supports
flash mode.

Signed-off-by: Simon Maurer <mail@maurer.systems>

Author: mausys

drivers/spi/CMakeLists.txt

@@ -88,6 +88,7 @@ zephyr_library_sources_ifdef(CONFIG_SPI_XEC_QMSPI spi_xec_qmspi.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_XEC_QMSPI_LDMA spi_xec_qmspi_ldma.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_XLNX_AXI_QUADSPI spi_xlnx_axi_quadspi.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_XLNX_ZYNQMP_GQSPI spi_xlnx_zynqmp_gqspi.c)
+zephyr_library_sources_ifdef(CONFIG_SPI_XLNX_ZYNQ_QSPI spi_xlnx_zynq_qspi.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_XMC4XXX spi_xmc4xxx.c)
 # zephyr-keep-sorted-stop
 

drivers/spi/Kconfig

@@ -166,6 +166,7 @@ source "drivers/spi/Kconfig.test"
 source "drivers/spi/Kconfig.wch"
 source "drivers/spi/Kconfig.xec_qmspi"
 source "drivers/spi/Kconfig.xlnx"
+source "drivers/spi/Kconfig.xlnx_zynq_qspi"
 source "drivers/spi/Kconfig.xlnx_zynqmp_gqspi"
 source "drivers/spi/Kconfig.xmc4xxx"
 source "drivers/spi/spi_nxp_lpspi/Kconfig"

drivers/spi/Kconfig.xlnx_zynq_qspi

@@ -0,0 +1,10 @@
+# Copyright (c) 2026 Simon Maurer <mail@maurer.systems>
+# SPDX-License-Identifier: Apache-2.0
+
+config SPI_XLNX_ZYNQ_QSPI
+	bool "Xilinx Zynq Quad SPI driver"
+	default y
+	depends on DT_HAS_XLNX_ZYNQ_QSPI_ENABLED
+	select EVENTS
+	help
+	  Enable Xilinx Zynq Quad SPI driver for accessing flash.