On Mon, Jan 12, 2026 at 04:55:54PM +0800, Edelweise Escala wrote:

Document device tree bindings for the LTC3220 18-channel LED driver
with I2C interface, individual brightness control, and hardware-assisted
blink/gradation features.

Signed-off-by: Edelweise Escala <redacted>
---

No changelog in the cover letter, no changelog here.

 .../devicetree/bindings/leds/leds-ltc3220.yaml     | 120 +++++++++++++++++++++
 MAINTAINERS                                        |   7 ++
 2 files changed, 127 insertions(+)

+  adi,quick-write:
+    type: boolean
+    description:
+      Enables the hardware quick-write feature where a write to the LED 1
+      output register simultaneously updates all 18 LED output registers
+      to the same value. Only applicable when LED 1 output is physically
+      present and defined in the device tree.

I have doubts that this works fine. If you define 18 different LED
nodes, each can be controlled by user-space or kernel independently, but
with this property updates to LED 1 would overwrite updates to other
LEDs.

Isn't this then an aggregated LED, so in such case only one LED can be
defined in DT (optionally with 18 led-sources)?

+
+patternProperties:
+  '^led@([1-9]|1[0-8])$':
+    type: object
+    $ref: /schemas/leds/common.yaml#
+    unevaluatedProperties: false
+    properties:
+      reg:
+        description: Output channel for the LED (1-18 maps to LED outputs D1-D18).
+        minimum: 1
+        maximum: 18

Best regards,
Krzysztof