drivers: spi: add cadence spi driver

This provides a driver for the cadence spi.

Signed-off-by: Ryan McClelland <ryanmcclelland@meta.com>

Author: XenuIsWatching

drivers/spi/CMakeLists.txt

@@ -20,6 +20,7 @@ zephyr_library_sources_ifdef(CONFIG_SPI_AMBIQ_SPID spi_ambiq_spid.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_ANDES_ATCSPI200 spi_andes_atcspi200.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_BITBANG spi_bitbang.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_CC13XX_CC26XX spi_cc13xx_cc26xx.c)
+zephyr_library_sources_ifdef(CONFIG_SPI_CDNS spi_cdns.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_DW spi_dw.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_EMUL spi_emul.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_GD32 spi_gd32.c)

drivers/spi/Kconfig

@@ -99,6 +99,7 @@ source "drivers/spi/Kconfig.andes_atcspi200"
 source "drivers/spi/Kconfig.b91"
 source "drivers/spi/Kconfig.bitbang"
 source "drivers/spi/Kconfig.cc13xx_cc26xx"
+source "drivers/spi/Kconfig.cdns"
 source "drivers/spi/Kconfig.dw"
 source "drivers/spi/Kconfig.esp32"
 source "drivers/spi/Kconfig.gd32"

drivers/spi/Kconfig.cdns

@@ -0,0 +1,8 @@
+# Copyright (c) 2024 Meta Platforms
+# SPDX-License-Identifier: Apache-2.0
+
+config SPI_CDNS
+	bool "Cadence SPI controller driver"
+	depends on DT_HAS_CDNS_SPI_ENABLED
+	help
+	  Enable the SPI peripherals based on Cadence IP6524