drivers: spi: Added ZynqMP Generic Quad SPI driver

Add a driver for the Generic Quad SPI hardware that is part of the
Xilinx MPSoC. This is mostly commonly used with QSPI flash devices which
are also used for initial image loading, but can also be used with other
SPI devices.

Signed-off-by: Robert Hancock <robert.hancock@calian.com>

Author: robhancocksed

drivers/spi/CMakeLists.txt

@@ -63,6 +63,7 @@ zephyr_library_sources_ifdef(CONFIG_SPI_TEST spi_test.c)
 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_XMC4XXX spi_xmc4xxx.c)
 # zephyr-keep-sorted-stop
 

drivers/spi/Kconfig

@@ -139,6 +139,7 @@ source "drivers/spi/Kconfig.stm32"
 source "drivers/spi/Kconfig.test"
 source "drivers/spi/Kconfig.xec_qmspi"
 source "drivers/spi/Kconfig.xlnx"
+source "drivers/spi/Kconfig.xlnx_zynqmp_gqspi"
 source "drivers/spi/Kconfig.xmc4xxx"
 source "drivers/spi/spi_nxp_lpspi/Kconfig"
 # zephyr-keep-sorted-stop

drivers/spi/Kconfig.xlnx_zynqmp_gqspi

@@ -0,0 +1,14 @@
+# Xilinx SPI
+
+# Copyright (c) 2020 Henrik Brix Andersen <henrik@brixandersen.dk>
+# SPDX-License-Identifier: Apache-2.0
+
+config SPI_XLNX_ZYNQMP_GQSPI
+	bool "Xilinx ZynqMP GQSPI driver"
+	default y
+	depends on DT_HAS_XLNX_ZYNQMP_QSPI_1_0_ENABLED
+	select EVENTS
+	help
+	  Enable Xilinx ZynqMP Generic Quad SPI driver.
+	  This is normally used with QSPI flash devices but can also be used
+	  with other SPI devices.