drivers: led: lp5569: enable auto-increment

The lp5569 controller supports auto-increment for its registers. This is by
default enabled in the chip, but the driver actively disabled it.

Since auto-increment is useful for writing multiple consecutive registers,
enable the feature. The driver, however, doesn't perform such consecutive
writes and thus the existing behavior is not altered.

Signed-off-by: Emil Dahl Juhl <[email protected]>
(cherry picked from commit 45744b4)

Author: Emil Dahl Juhl

doc/releases/release-notes-4.1.rst

@@ -0,0 +1,324 @@
+:orphan:
+
+.. _zephyr_4.1:
+
+Zephyr 4.1.0 (Working Draft)
+############################
+
+We are pleased to announce the release of Zephyr version 4.1.0.
+
+Major enhancements with this release include:
+
+An overview of the changes required or recommended when migrating your application from Zephyr
+v4.0.0 to Zephyr v4.1.0 can be found in the separate :ref:`migration guide<migration_4.1>`.
+
+The following sections provide detailed lists of changes by component.
+
+Security Vulnerability Related
+******************************
+The following CVEs are addressed by this release:
+
+More detailed information can be found in:
+https://docs.zephyrproject.org/latest/security/vulnerabilities.html
+
+API Changes
+***********
+
+Removed APIs in this release
+============================
+
+ * The deprecated Bluetooth HCI driver API has been removed. It has been replaced by a
+   :c:group:`new API<bt_hci_api>` that follows the normal Zephyr driver model.
+
+Deprecated in this release
+==========================
+
+Architectures
+*************
+
+* Common
+
+  * Introduced :kconfig:option:`CONFIG_ARCH_HAS_CUSTOM_CURRENT_IMPL`, which can be selected when
+    an architecture implemented and enabled its own :c:func:`arch_current_thread` and
+    :c:func:`arch_current_thread_set` functions for faster retrieval of the current CPU's thread
+    pointer. When enabled, ``_current`` variable will be routed to the
+    :c:func:`arch_current_thread` (:github:`80716`).
+
+* ARC
+
+* ARM
+
+* ARM64
+
+* RISC-V
+
+  * Implements :c:func:`arch_current_thread_set` & :c:func:`arch_current_thread`, which can be enabled
+    by :kconfig:option:`CONFIG_RISCV_CURRENT_VIA_GP` (:github:`80716`).
+
+* Xtensa
+
+* native/POSIX
+
+  * :kconfig:option:`CONFIG_NATIVE_APPLICATION` has been deprecated.
+  * For the native_sim target :kconfig:option:`CONFIG_NATIVE_SIM_NATIVE_POSIX_COMPAT` has been
+    switched to ``n`` by default, and this option has been deprecated.
+
+Kernel
+******
+
+Bluetooth
+*********
+
+* Audio
+
+* Host
+
+* HCI Drivers
+
+Boards & SoC Support
+********************
+
+* Added support for these SoC series:
+
+* Made these changes in other SoC series:
+
+* Added support for these boards:
+
+* Made these board changes:
+
+* Added support for the following shields:
+
+Build system and Infrastructure
+*******************************
+
+Drivers and Sensors
+*******************
+
+* ADC
+
+* Battery
+
+* CAN
+
+* Charger
+
+* Clock control
+
+* Counter
+
+* DAC
+
+* Disk
+
+* Display
+
+  * Added flag ``frame_incomplete`` to ``display_write`` that indicates whether a write is the last
+    write of the frame, allowing display drivers to implement double buffering / tearing enable
+    signal handling (:github:`81250`)
+  * Added ``frame_incomplete`` handling to SDL display driver (:dtcompatible:`zephyr,sdl-dc`)
+    (:github:`81250`)
+  * Added transparency support to SDL display driver (:dtcompatible:`zephyr,sdl-dc`) (:github:`81184`)
+
+* Ethernet
+
+* Flash
+
+* GNSS
+
+* GPIO
+
+* Hardware info
+
+* I2C
+
+* I2S
+
+* I3C
+
+* Input
+
+* LED
+
+  * Added a new set of devicetree based LED APIs, see :c:struct:`led_dt_spec`.
+  * lp5569: added use of auto-increment functionality.
+
+* LED Strip
+
+* LoRa
+
+* Mailbox
+
+* MDIO
+
+* MFD
+
+* Modem
+
+* MIPI-DBI
+
+* MSPI
+
+* Pin control
+
+* PWM
+
+* Regulators
+
+* Reset
+
+* RTC
+
+* RTIO
+
+* SDHC
+
+* Sensors
+
+* Serial
+
+* SPI
+
+* USB
+
+* Video
+
+* Watchdog
+
+* Wi-Fi
+
+Networking
+**********
+
+* ARP:
+
+* CoAP:
+
+* Connection manager:
+
+* DHCPv4:
+
+* DHCPv6:
+
+* DNS/mDNS/LLMNR:
+
+* gPTP/PTP:
+
+* HTTP:
+
+* IPSP:
+
+* IPv4:
+
+* IPv6:
+
+* LwM2M:
+
+* Misc:
+
+* MQTT:
+
+* Network Interface:
+
+* OpenThread
+
+* PPP
+
+* Shell:
+
+* Sockets:
+
+* Syslog:
+
+* TCP:
+
+* Websocket:
+
+* Wi-Fi:
+
+* zperf:
+
+USB
+***
+
+Devicetree
+**********
+
+Kconfig
+*******
+
+Libraries / Subsystems
+**********************
+
+* Debug
+
+* Demand Paging
+
+* Formatted output
+
+* Management
+
+* Logging
+
+* Modem modules
+
+* Power management
+
+* Crypto
+
+* CMSIS-NN
+
+* FPGA
+
+* Random
+
+* SD
+
+* State Machine Framework
+
+* Storage
+
+* Task Watchdog
+
+* POSIX API
+
+* LoRa/LoRaWAN
+
+* ZBus
+
+HALs
+****
+
+* Nordic
+
+* STM32
+
+* ADI
+
+* Espressif
+
+MCUboot
+*******
+
+OSDP
+****
+
+Trusted Firmware-M
+******************
+
+LVGL
+****
+
+* Added ``frame_incomplete`` support to indicate whether a write is the last
+  write of the frame (:github:`81250`)
+
+Tests and Samples
+*****************
+
+* Fixed incorrect alpha values in :zephyr_file:`samples/drivers/display`. (:github:`81184`)
+* Added :zephyr_file:`samples/modules/lvgl/screen_transparency`. (:github:`81184`)
+
+Issue Related Items
+*******************
+
+Known Issues
+============

drivers/led/lp5569.c

@@ -31,6 +31,7 @@ LOG_MODULE_REGISTER(lp5569, CONFIG_LED_LOG_LEVEL);
 
 #define LP5569_MISC          0x2F
 #define LP5569_POWERSAVE_EN  BIT(5)
+#define LP5569_EN_AUTO_INCR  BIT(6)
 #define LP5569_CP_MODE_SHIFT 3
 
 /* PWM base Register for controlling the duty-cycle */
@@ -110,7 +111,7 @@ static int lp5569_enable(const struct device *dev)
 	}
 
 	ret = i2c_reg_write_byte_dt(&config->bus, LP5569_MISC,
-				    LP5569_POWERSAVE_EN |
+				    LP5569_POWERSAVE_EN | LP5569_EN_AUTO_INCR |
 					    (config->cp_mode << LP5569_CP_MODE_SHIFT));
 	if (ret < 0) {
 		LOG_ERR("LED reg update failed");