| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/leds/skyworks,aat1290.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Skyworks Solutions, Inc. AAT1290 Current Regulator for Flash LEDs |
| 8 | |
| 9 | maintainers: |
| 10 | - Jacek Anaszewski <jacek.anaszewski@gmail.com> |
| 11 | - Krzysztof Kozlowski <krzk@kernel.org> |
| 12 | |
| 13 | description: | |
| 14 | The device is controlled through two pins:: FL_EN and EN_SET. The pins when, |
| 15 | asserted high, enable flash strobe and movie mode (max 1/2 of flash current) |
| 16 | respectively. In order to add a capability of selecting the strobe signal |
| 17 | source (e.g. CPU or camera sensor) there is an additional switch required, |
| 18 | independent of the flash chip. The switch is controlled with pin control. |
| 19 | |
| 20 | properties: |
| 21 | compatible: |
| 22 | const: skyworks,aat1290 |
| 23 | |
| 24 | enset-gpios: |
| 25 | maxItems: 1 |
| 26 | description: EN_SET pin |
| 27 | |
| 28 | flen-gpios: |
| 29 | maxItems: 1 |
| 30 | description: FL_EN pin |
| 31 | |
| 32 | led: |
| 33 | $ref: common.yaml# |
| 34 | unevaluatedProperties: false |
| 35 | |
| 36 | properties: |
| 37 | led-max-microamp: true |
| 38 | |
| 39 | flash-max-microamp: |
| 40 | description: | |
| 41 | Maximum flash LED supply current can be calculated using following |
| 42 | formula:: I = 1A * 162 kOhm / Rset. |
| 43 | |
| 44 | flash-max-timeout-us: |
| 45 | description: | |
| 46 | Maximum flash timeout can be calculated using following formula:: |
| 47 | T = 8.82 * 10^9 * Ct. |
| 48 | |
| 49 | required: |
| 50 | - flash-max-microamp |
| 51 | - flash-max-timeout-us |
| 52 | - led-max-microamp |
| 53 | |
| 54 | pinctrl-names: |
| 55 | items: |
| 56 | - const: default |
| 57 | - const: host |
| 58 | - const: isp |
| 59 | |
| 60 | pinctrl-0: true |
| 61 | pinctrl-1: true |
| 62 | pinctrl-2: true |
| 63 | |
| 64 | required: |
| 65 | - compatible |
| 66 | - enset-gpios |
| 67 | - flen-gpios |
| 68 | - led |
| 69 | |
| 70 | additionalProperties: false |
| 71 | |
| 72 | examples: |
| 73 | - | |
| 74 | #include <dt-bindings/gpio/gpio.h> |
| 75 | #include <dt-bindings/leds/common.h> |
| 76 | |
| 77 | // Ct = 220 nF, Rset = 160 kOhm |
| 78 | led-controller { |
| 79 | compatible = "skyworks,aat1290"; |
| 80 | flen-gpios = <&gpj1 1 GPIO_ACTIVE_HIGH>; |
| 81 | enset-gpios = <&gpj1 2 GPIO_ACTIVE_HIGH>; |
| 82 | |
| 83 | pinctrl-names = "default", "host", "isp"; |
| 84 | pinctrl-0 = <&camera_flash_host>; |
| 85 | pinctrl-1 = <&camera_flash_host>; |
| 86 | pinctrl-2 = <&camera_flash_isp>; |
| 87 | |
| 88 | led { |
| 89 | function = LED_FUNCTION_FLASH; |
| 90 | color = <LED_COLOR_ID_WHITE>; |
| 91 | led-max-microamp = <520833>; |
| 92 | flash-max-microamp = <1012500>; |
| 93 | flash-max-timeout-us = <1940000>; |
| 94 | }; |
| 95 | }; |