dt-bindings: leds: skyworks,aat1290: convert to dtschema

Convert the Skyworks Solutions, Inc. AAT1290 Current Regulator bindings
to DT Schema.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220721160611.250274-1-krzysztof.kozlowski@linaro.org

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>;
+        };
+    };