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