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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/leds/skyworks,aat1290.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Skyworks Solutions, Inc. AAT1290 Current Regulator for Flash LEDs
maintainers:
- Jacek Anaszewski <jacek.anaszewski@gmail.com>
- Krzysztof Kozlowski <krzk@kernel.org>
description: |
The device is controlled through two pins:: FL_EN and EN_SET. The pins when,
asserted high, enable flash strobe and movie mode (max 1/2 of flash current)
respectively. In order to add a capability of selecting the strobe signal
source (e.g. CPU or camera sensor) there is an additional switch required,
independent of the flash chip. The switch is controlled with pin control.
properties:
compatible:
const: skyworks,aat1290
enset-gpios:
maxItems: 1
description: EN_SET pin
flen-gpios:
maxItems: 1
description: FL_EN pin
led:
$ref: common.yaml#
unevaluatedProperties: false
properties:
led-max-microamp: true
flash-max-microamp:
description: |
Maximum flash LED supply current can be calculated using following
formula:: I = 1A * 162 kOhm / Rset.
flash-max-timeout-us:
description: |
Maximum flash timeout can be calculated using following formula::
T = 8.82 * 10^9 * Ct.
required:
- flash-max-microamp
- flash-max-timeout-us
- led-max-microamp
pinctrl-names:
items:
- const: default
- const: host
- const: isp
pinctrl-0: true
pinctrl-1: true
pinctrl-2: true
required:
- compatible
- enset-gpios
- flen-gpios
- led
additionalProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/leds/common.h>
// Ct = 220 nF, Rset = 160 kOhm
led-controller {
compatible = "skyworks,aat1290";
flen-gpios = <&gpj1 1 GPIO_ACTIVE_HIGH>;
enset-gpios = <&gpj1 2 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default", "host", "isp";
pinctrl-0 = <&camera_flash_host>;
pinctrl-1 = <&camera_flash_host>;
pinctrl-2 = <&camera_flash_isp>;
led {
function = LED_FUNCTION_FLASH;
color = <LED_COLOR_ID_WHITE>;
led-max-microamp = <520833>;
flash-max-microamp = <1012500>;
flash-max-timeout-us = <1940000>;
};
};
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