drivers: stepper: Add driver for DRV8424 stepper motor controller

Adds a step/dir stepper driver for the drv8424 stepper driver.

Signed-off-by: Sarah Renkhoff <[email protected]>

Author: Irockasingranite

drivers/stepper/CMakeLists.txt

@@ -5,6 +5,7 @@ zephyr_syscall_header(${ZEPHYR_BASE}/include/zephyr/drivers/stepper.h)
 
 # zephyr-keep-sorted-start
 add_subdirectory_ifdef(CONFIG_STEPPER_ADI_TMC adi_tmc)
+add_subdirectory_ifdef(CONFIG_STEPPER_TI ti)
 # zephyr-keep-sorted-stop
 
 zephyr_library()

drivers/stepper/Kconfig

@@ -35,6 +35,7 @@ comment "Stepper Drivers"
 rsource "Kconfig.fake"
 rsource "Kconfig.gpio"
 rsource "adi_tmc/Kconfig"
+rsource "ti/Kconfig"
 # zephyr-keep-sorted-stop
 
 endif

drivers/stepper/ti/CMakeLists.txt

@@ -0,0 +1,7 @@
+# SPDX-FileCopyrightText: Copyright (c) 2024 Navimatix GmbH
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+zephyr_library_property(ALLOW_EMPTY TRUE)
+
+zephyr_library_sources_ifdef(CONFIG_DRV8424 drv8424.c)

drivers/stepper/ti/Kconfig

@@ -0,0 +1,17 @@
+# SPDX-FileCopyrightText: Copyright (c) 2024 Navimatix GmbH
+# SPDX-License-Identifier: Apache-2.0
+
+config STEPPER_TI
+	bool "TI Stepper Controller"
+	depends on STEPPER
+	default y
+	help
+	  Enable ti stepper controller
+
+if STEPPER_TI
+
+comment "TI Stepper Drivers"
+
+rsource "Kconfig.drv8424"
+
+endif # STEPPER_TI

drivers/stepper/ti/Kconfig.drv8424

@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: Copyright (c) 2024 Navimatix GmbH
+# SPDX-License-Identifier: Apache-2.0
+
+config DRV8424
+	bool "TI DRV8424 stepper motor driver"
+	default y
+	depends on DT_HAS_TI_DRV8424_ENABLED
+	select COUNTER
+	help
+	  Enable driver for TI DRV8424 stepper motor driver.
+
+if DRV8424
+
+config DRV8424_EVENT_QUEUE_LEN
+	int "Maximum number of pending stepper events"
+	default 4
+	help
+	  The maximum number of stepper events that can be pending before new events
+	  are dropped.
+
+endif # DRV8424