WIP FPC-III support
[linux/fpc-iii.git] / Documentation / devicetree / bindings / leds / leds-gpio.yaml
blob7ad2baeda0b0748d7f2186a4ef2f77fa60eacbab
1 # SPDX-License-Identifier: GPL-2.0-only
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/leds/leds-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: LEDs connected to GPIO lines
9 maintainers:
10   - Jacek Anaszewski <jacek.anaszewski@gmail.com>
11   - Pavel Machek <pavel@ucw.cz>
13 description:
14   Each LED is represented as a sub-node of the gpio-leds device.  Each
15   node's name represents the name of the corresponding LED.
17 properties:
18   compatible:
19     const: gpio-leds
21 patternProperties:
22   # The first form is preferred, but fall back to just 'led' anywhere in the
23   # node name to at least catch some child nodes.
24   "(^led-[0-9a-f]$|led)":
25     type: object
27     $ref: common.yaml#
29     properties:
30       gpios:
31         maxItems: 1
33       retain-state-suspended:
34         description:
35           The suspend state can be retained.Such as charge-led gpio.
36         type: boolean
38       retain-state-shutdown:
39         description:
40           Retain the state of the LED on shutdown. Useful in BMC systems, for
41           example when the BMC is rebooted while the host remains up.
42         type: boolean
44     required:
45       - gpios
47 additionalProperties: false
49 examples:
50   - |
52     #include <dt-bindings/gpio/gpio.h>
53     #include <dt-bindings/leds/common.h>
55     leds {
56         compatible = "gpio-leds";
57         led-0 {
58             gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW>;
59             linux,default-trigger = "disk-activity";
60             function = LED_FUNCTION_DISK;
61         };
63         led-1 {
64             gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>;
65             /* Keep LED on if BIOS detected hardware fault */
66             default-state = "keep";
67             function = LED_FUNCTION_FAULT;
68         };
69     };
71     run-control {
72         compatible = "gpio-leds";
73         led-0 {
74             gpios = <&mpc8572 6 GPIO_ACTIVE_HIGH>;
75             color = <LED_COLOR_ID_RED>;
76             default-state = "off";
77         };
78         led-1 {
79             gpios = <&mpc8572 7 GPIO_ACTIVE_HIGH>;
80             color = <LED_COLOR_ID_GREEN>;
81             default-state = "on";
82         };
83     };
85 ...