linux-kernel - [PATCH v8 0/5] auxdisplay: add support for TI LP5812 4x3 Matrix LED driver

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Message-Id: <20250427082447.138359-1-trannamatk@gmail.com>
Date: Sun, 27 Apr 2025 15:24:42 +0700
From: Nam Tran <trannamatk@...il.com>
To: andy@...nel.org
Cc: geert@...ux-m68k.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	christophe.jaillet@...adoo.fr,
	corbet@....net,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org,
	florian.fainelli@...adcom.com,
	bcm-kernel-feedback-list@...adcom.com,
	linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	Nam Tran <trannamatk@...il.com>
Subject: [PATCH v8 0/5] auxdisplay: add support for TI LP5812 4x3 Matrix LED driver

This patch series adds support for the TI/National Semiconductor LP5812
4x3 matrix RGB LED driver. The driver supports features such as autonomous
animation and time-cross-multiplexing (TCM) for dynamic LED effects.

Signed-off-by: Nam Tran <trannamatk@...il.com>
---
Changes in v8:
- Move driver to drivers/auxdisplay/ instead of drivers/leds/.
- Rename files from leds-lp5812.c/.h to lp5812.c/.h.
- Move ti,lp5812.yaml binding to auxdisplay/ directory,
  and update the title and $id to match new path.
- No functional changes to the binding itself (keep Reviewed-by).
- Update commit messages and patch titles to reflect the move.
- Link to v7: https://lore.kernel.org/linux-leds/20250422190121.46839-1-trannamatk@gmail.com/

Changes in v7:
- Mark `chip_leds_map` as const.
- Use consistent `ret` initialization.
- Simplify the function `set_mix_sel_led()`.
- Refactor `dev_config_show()` and `led_auto_animation_show()` to avoid temp buffer, malloc/free.
- Simplify the code and ensure consistent use of mutex lock/unlock in show/store functions.
- Remove `total_leds` and `total_aeu`.
- Link to v6: https://lore.kernel.org/linux-leds/20250419184333.56617-1-trannamatk@gmail.com/

Changes in v6:
- Add `vcc-supply` property to describe the LP5812 power supply.
- Remove `chan-name` property and entire LED subnodes, as they are not needed.
- Update LP5812 LED driver node to Raspberry Pi 4 B Device Tree, based on updated binding.
- Link to v5: https://lore.kernel.org/linux-leds/20250414145742.35713-1-trannamatk@gmail.com/

Changes in v5:
- Rebase on v6.15-rc2
- Removed unused functions (lp5812_dump_regs, lp5812_update_bit).
- Address Krzysztof's review comments
- Link to v4: https://lore.kernel.org/linux-leds/20250405183246.198568-1-trannamatk@gmail.com/
---

Nam Tran (5):
  dt-bindings: auxdisplay: add TI LP5812 4×3 Matrix RGB LED Driver
  auxdisplay: add TI LP5812 4×3 Matrix RGB LED Driver
  docs: ABI: Document LP5812 sysfs interfaces
  docs: auxdisplay: document TI LP5812 RGB LED driver
  arm64: dts: Add LP5812 node for Raspberry Pi 4 Model B

 .../ABI/testing/sysfs-bus-i2c-devices-lp5812  |  144 +
 .../admin-guide/auxdisplay/index.rst          |    3 +-
 .../admin-guide/auxdisplay/lp5812.rst         |   79 +
 .../bindings/auxdisplay/ti,lp5812.yaml        |   46 +
 MAINTAINERS                                   |   12 +
 .../arm/boot/dts/broadcom/bcm2711-rpi-4-b.dts |   10 +
 drivers/auxdisplay/Kconfig                    |   17 +
 drivers/auxdisplay/Makefile                   |    1 +
 drivers/auxdisplay/lp5812.c                   | 2736 +++++++++++++++++
 drivers/auxdisplay/lp5812.h                   |  348 +++
 10 files changed, 3395 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-i2c-devices-lp5812
 create mode 100644 Documentation/admin-guide/auxdisplay/lp5812.rst
 create mode 100644 Documentation/devicetree/bindings/auxdisplay/ti,lp5812.yaml
 create mode 100644 drivers/auxdisplay/lp5812.c
 create mode 100644 drivers/auxdisplay/lp5812.h


base-commit: f1a3944c860b0615d0513110d8cf62bb94adbb41
-- 
2.25.1