Re: [PATCH v2 1/5] dt-bindings: leds: Document TI LM3560 Synchronous Boost Flash Driver

Conor Dooley
2026-04-20T16:20:32Z

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On Sun, Apr 19, 2026 at 12:34:08PM +0300, Svyatoslav Ryhel wrote:
> Document TI LM3560 Synchronous Boost Flash Driver used for camera flash
> LEDs.
>
> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
> ---
> .../devicetree/bindings/leds/ti,lm3560.yaml | 131 ++++++++++++++++++
> 1 file changed, 131 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/leds/ti,lm3560.yaml
>
> diff --git a/Documentation/devicetree/bindings/leds/ti,lm3560.yaml b/Documentation/devicetree/bindings/leds/ti,lm3560.yaml
> new file mode 100644
> index 000000000000..c6c553ad23f9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/ti,lm3560.yaml
> @@ -0,0 +1,131 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/ti,lm3560.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI LM3560 Synchronous Boost Flash Driver
> +
> +maintainers:
> + - Svyatoslav Ryhel <clamor95@gmail.com>
> +
> +description:
> + The LM3560 is a 2-MHz fixed frequency synchronous boost converter with two
> + 1000-mA constant current drivers for high-current white LEDs. The dual high-
> + side current sources allow for grounded cathode LED operation and can be
> + tied together for providing flash currents at up to 2 A through a single LED.
> + An adaptive regulation method ensures the current for each LED remains in
> + regulation and maximizes efficiency.
> +
> +allOf:
> + - $ref: /schemas/leds/common.yaml
> +
> +properties:
> + compatible:
> + enum:
> + - ti,lm3559
> + - ti,lm3560

What differentiates these devices to the point that fallback compatibles
are not suitable?

Cheers,
Conor.

> +
> + reg:
> + maxItems: 1
> +
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + enable-gpios:
> + description: GPIO connected to the HWEN pin.
> + maxItems: 1
> +
> + vin-supply:
> + description: Supply connected to the IN line.
> +
> + flash-max-timeout-us:
> + minimum: 32000
> + maximum: 1024000
> + default: 32000
> +
> + ti,peak-current-microamp:
> + description:
> + The LM3560 features 4 selectable current limits 1.6A, 2.3A, 3A, and 3.6A.
> + When the current limit is reached, the LM3560 stops switching for the
> + remainder of the switching cycle.
> + enum: [16000000, 23000000, 30000000, 36000000]
> + default: 16000000
> +
> +patternProperties:
> + '^led@[01]$':
> + description: LED control bank nodes.
> + $ref: /schemas/leds/common.yaml#
> + unevaluatedProperties: false
> +
> + properties:
> + reg:
> + description: Control bank selection (0 = bank A, 1 = bank B).
> + maximum: 1
> +
> + flash-max-microamp:
> + minimum: 62500
> + maximum: 1000000
> +
> + led-max-microamp:
> + minimum: 31250
> + maximum: 250000
> +
> + required:
> + - reg
> + - flash-max-microamp
> + - led-max-microamp
> +
> +required:
> + - compatible
> + - reg
> + - '#address-cells'
> + - '#size-cells'
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + led-controller@53 {
> + compatible = "ti,lm3560";
> + reg = <0x53>;
> +
> + enable-gpios = <&gpio 28 GPIO_ACTIVE_HIGH>;
> + vin-supply = <&vdd_3v3_sys>;
> +
> + flash-max-timeout-us = <1024000>;
> + ti,peak-current-microamp = <16000000>;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + led@0 {
> + reg = <0>;
> +
> + label = "white::flash";
> + linux,default-trigger = "flash";
> +
> + flash-max-microamp = <562500>;
> + led-max-microamp = <156250>;
> + };
> +
> + led@1 {
> + reg = <1>;
> +
> + label = "yellow::flash";
> + linux,default-trigger = "flash";
> +
> + flash-max-microamp = <562500>;
> + led-max-microamp = <156250>;
> + };
> + };
> + };
> --
> 2.51.0
>

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