drivers: dali: add generic DALI driver

Add a DALI driver subsystem.
Add a driver implementation for STM32 style
PWM peripherals. Also, add an implementation
for the NXP LPC11u68.

Signed-off-by: Sven Haedrich <[email protected]>

Author: Sven Hädrich

drivers/CMakeLists.txt

@@ -31,6 +31,7 @@ add_subdirectory_ifdef(CONFIG_COUNTER counter)
 add_subdirectory_ifdef(CONFIG_CRYPTO crypto)
 add_subdirectory_ifdef(CONFIG_DAC dac)
 add_subdirectory_ifdef(CONFIG_DAI dai)
+add_subdirectory_ifdef(CONFIG_DALI dali)
 add_subdirectory_ifdef(CONFIG_DISPLAY display)
 add_subdirectory_ifdef(CONFIG_DMA dma)
 add_subdirectory_ifdef(CONFIG_DP_DRIVER dp)

drivers/Kconfig

@@ -23,6 +23,7 @@ source "drivers/counter/Kconfig"
 source "drivers/crypto/Kconfig"
 source "drivers/dac/Kconfig"
 source "drivers/dai/Kconfig"
+source "drivers/dali/Kconfig"
 source "drivers/disk/Kconfig"
 source "drivers/display/Kconfig"
 source "drivers/dma/Kconfig"

drivers/dali/CMakeLists.txt

@@ -0,0 +1,8 @@
+# Copyright (c) 2025 by Sven Hädrich <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+# zephyr-keep-sorted-start
+zephyr_library_sources_ifdef(CONFIG_DALI_LPC11U6X dali_lpc11u6x.c)
+zephyr_library_sources_ifdef(CONFIG_DALI_PWM      dali_pwm.c)
+# zephyr-keep-sorted-stop

drivers/dali/Kconfig

@@ -0,0 +1,27 @@
+# DALI configuration options
+
+# Copyright (c) 2025 by Sven Hädrich <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+config DALI
+	bool "Digital Addressable Lighting Interface (DALI) drivers"
+	default y
+	help
+	  Enable generic support for DALI bus (IEC 62386).
+
+if DALI
+
+config DALI_MAX_FRAMES_IN_QUEUE
+	int "Max frames in DALI recv queue"
+	default 3
+	range 1 16
+	help
+	  How many frames should be buffered in the recv queue
+
+source "drivers/dali/Kconfig.lpc11u6x"
+source "drivers/dali/Kconfig.pwm"
+
+module = DALI_LOW_LEVEL
+module-str = dali_low_level
+source "subsys/logging/Kconfig.template.log_config"
+endif # DALI

drivers/dali/Kconfig.lpc11u6x

@@ -0,0 +1,25 @@
+# LPC11U6x DALI configuration options
+
+# Copyright (c) 2025 by Sven Hädrich <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+config DALI_LPC11U6X
+	bool "LPC11U6x DALI driver"
+	default y
+	depends on DT_HAS_NXP_DALI_ENABLED
+	help
+	  Enable the DALI driver for LPC11U6X MCUs.
+
+config DALI_LPC11U6X_PRIORITY
+	int "DALI workqueue priority"
+	depends on DT_HAS_NXP_DALI_ENABLED
+	default 5
+	help
+	  The priority of the workqueue used for the DALI driver.
+
+config DALI_LPC11U6X_STACK_SIZE
+	int "DALI driver workqueue thread stack size"
+	depends on DT_HAS_NXP_DALI_ENABLED
+	default 768
+	help
+	  The thread stack size.

drivers/dali/Kconfig.pwm

@@ -0,0 +1,43 @@
+# PWM DALI configuration options
+
+# Copyright (c) 2025 by Sven Hädrich <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+config DALI_PWM
+	bool "Generic PWM DALI driver"
+	default y
+	depends on DT_HAS_ZEPHYR_DALI_PWM_ENABLED
+	select PWM
+	select PWM_CAPTURE
+	help
+	  Enable DALI driver for generic PWM MCUs.
+
+if DALI_PWM
+
+choice
+	prompt "Thread for sending out"
+	default DALI_PWM_OWN_THREAD
+
+config DALI_PWM_GLOBAL_THREAD
+	bool "Use global thread"
+
+config DALI_PWM_OWN_THREAD
+	bool "Use own thread"
+
+endchoice
+
+config DALI_PWM_THREAD_PRIORITY
+	int "DALI send own thread priority"
+	depends on DALI_PWM_OWN_THREAD
+	default 10
+	help
+	  The priority of the thread used for sending DALI frames.
+
+config DALI_PWM_THREAD_STACK_SIZE
+	int "DALI send own thread stack size"
+	depends on DALI_PWM_OWN_THREAD
+	default 1024
+	help
+	  The thread stack size.
+
+endif # DALI_PWM