[PATCH v4 0/2] Add support for LTC3208 multi-display driver

Jan Carlo Roleda
2026-04-16T02:39:35Z

The LTC3208 is a multi-display LED driver, using a high-efficiency, low
noise charge pump to provide power to 5 channels (MAIN, SUB, RGB, CAM,
AUX). Current for each LED is controlled by the I2C serial interface.
Four AUX current sources can be independently assigned via the I2C port
to the CAM, SUB, MAIN, or AUX DAC controlled displays

Signed-off-by: Jan Carlo Roleda <jancarlo.roleda@analog.com>
---
Changes in v4:
- Reordered commit order to match dependency order
- Updated Kconfig to be more descriptive of device
- Added led@0-7 with more complete example properties (function and
color)
- Driver changes:
-- Removed unnecessary include headers
-- Formatted macros
-- Created helper `write_current_level` functions for LED current
configuration, using `regmap_update_bits()`
-- Adjusted awkward tabbing issues
-- Updated variable names in probe to be more descriptive
-- Updated inline comment capitalization
-- Initialized `i` within the for loop in AUX configuration in probe
-- Refactored `update_aux_dac` function to use array pointer
-- Fixed error messages in probe
- Link to v3: https://lore.kernel.org/r/20260406-upstream-ltc3208-v3-0-7f0b1d20ee7a@analog.com

Changes in v3:
- Edited device bindings descriptions
-- removed full stop in title
-- replaced quotes with double quotes for consistency
-- removed <dt-bindings/gpio/gpio.h> from example
-- removed led1-7 in example for brevity
- squashed maintainers commit to driver commit
- Link to v2: https://lore.kernel.org/r/20260326-upstream-ltc3208-v2-0-3dbc992b6098@analog.com

Changes in v2:
- Addressed DTSchema bot warnings and errors
-- removed extra blank lines
-- fixed $id to match current naming
- Addressed Kernel test warnings
-- fixed bounds for aux channel configurations
- Link to v0: https://lore.kernel.org/r/20260318-upstream-ltc3208-v1-0-015f1f1e9065@analog.com

---
Jan Carlo Roleda (2):
dt-bindings: leds: Document LTC3208 Multidisplay LED Driver
leds: ltc3208: Add driver for LTC3208 Multidisplay LED Driver

.../devicetree/bindings/leds/adi,ltc3208.yaml | 181 ++++++++++++++
MAINTAINERS | 7 +
drivers/leds/Kconfig | 12 +
drivers/leds/Makefile | 1 +
drivers/leds/leds-ltc3208.c | 278 +++++++++++++++++++++
5 files changed, 479 insertions(+)
---
base-commit: e68f95a51d1a8c1594b536c4d495cbea38d47561
change-id: 20260318-upstream-ltc3208-7cc8968bf69e

Best regards,
--
Jan Carlo Roleda <jancarlo.roleda@analog.com>