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Diffstat (limited to 'Documentation/devicetree/bindings/leds/skyworks,aat1290.yaml')
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diff --git a/Documentation/devicetree/bindings/leds/skyworks,aat1290.yaml b/Documentation/devicetree/bindings/leds/skyworks,aat1290.yaml new file mode 100644 index 0000000000..a6aaa92dbc --- /dev/null +++ b/Documentation/devicetree/bindings/leds/skyworks,aat1290.yaml @@ -0,0 +1,95 @@ +# 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>; + }; + }; |