optional load modes for iCE40

doc/releases/release-notes-4.1.rst

@@ -130,6 +130,12 @@ Drivers and Sensors
 
 * Flash
 
+* FPGA
+
+  * Extracted from :dtcompatible:`lattice,ice40-fpga` the compatible and driver for
+    :dtcompatible:`lattice,ice40-fpga-bitbang`. This replaces the original ``load_mode`` property from
+    the binding, which selected either the SPI or GPIO bitbang load mode.
+
 * GNSS
 
 * GPIO

drivers/fpga/CMakeLists.txt

@@ -6,7 +6,9 @@ zephyr_library_sources_ifdef(CONFIG_FPGA_SHELL  fpga_shell.c)
 
 zephyr_library_sources_ifdef(CONFIG_ALTERA_AGILEX_BRIDGE_FPGA     fpga_altera_agilex_bridge.c)
 zephyr_library_sources_ifdef(CONFIG_EOS_S3_FPGA fpga_eos_s3.c)
-zephyr_library_sources_ifdef(CONFIG_ICE40_FPGA  fpga_ice40.c)
+zephyr_library_sources_ifdef(CONFIG_ICE40_FPGA  fpga_ice40_common.c)
+zephyr_library_sources_ifdef(CONFIG_ICE40_FPGA_SPI  fpga_ice40_spi.c)
+zephyr_library_sources_ifdef(CONFIG_ICE40_FPGA_BITBANG  fpga_ice40_bitbang.c)
 zephyr_library_sources_ifdef(CONFIG_MPFS_FPGA fpga_mpfs.c)
 zephyr_library_sources_ifdef(CONFIG_ZYNQMP_FPGA fpga_zynqmp.c)
 zephyr_library_sources_ifdef(CONFIG_SLG471X5_FPGA fpga_slg471x5.c)

drivers/fpga/Kconfig.ice40

@@ -1,10 +1,31 @@
 # Copyright (c) 2022 Meta
 # SPDX-License-Identifier: Apache-2.0
 
-config ICE40_FPGA
-	bool "Lattice iCE40 fpga driver [EXPERIMENTAL]"
-	select EXPERIMENTAL
+menuconfig ICE40_FPGA
+	bool "Lattice iCE40 fpga driver"
+	default y
+	depends on (DT_HAS_LATTICE_ICE40_FPGA_ENABLED || \
+		   DT_HAS_LATTICE_ICE40_FPGA_BITBANG_ENABLED)
 	imply CRC
 	depends on SPI
 	help
 	  Enable support for the Lattice iCE40 fpga driver.
+
+if ICE40_FPGA
+
+config ICE40_FPGA_SPI
+	bool "Lattice iCE40 fpga SPI driver"
+	default y
+	depends on DT_HAS_LATTICE_ICE40_FPGA_ENABLED
+	help
+	  Enable support for the Lattice iCE40 fpga SPI driver.
+
+config ICE40_FPGA_BITBANG
+	bool "Lattice iCE40 fpga driver GPIO bitbang"
+	default y
+	select EXPERIMENTAL
+	depends on DT_HAS_LATTICE_ICE40_FPGA_BITBANG_ENABLED
+	help
+	  Enable support for the Lattice iCE40 fpga GPIO bitbang driver.
+
+endif # ICE40_FPGA