Lines Matching +full:led +full:- +full:max +full:- +full:microamp
1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jacek Anaszewski <jacek.anaszewski@gmail.com>
11 - Pavel Machek <pavel@ucw.cz>
14 LED and flash LED devices provide the same basic functionality as current
15 regulators, but extended with LED and flash LED specific features like
18 Many LED devices expose more than one current output that can be connected
19 to one or more discrete LED component. Since the arrangement of connections
20 can influence the way of the LED device initialization, the LED components
21 have to be tightly coupled with the LED device binding. They are represented
22 by child nodes of the parent LED device binding.
25 led-sources:
27 List of device current outputs the LED is connected to. The outputs are
28 identified by the numbers that must be defined in the LED device binding
30 $ref: /schemas/types.yaml#/definitions/uint32-array
34 LED function. Use one of the LED_FUNCTION_* prefixed definitions
35 from the header include/dt-bindings/leds/common.h. If there is no
41 Color of the LED. Use one of the LED_COLOR_ID_* prefixed definitions from
42 the header include/dt-bindings/leds/common.h. If there is no matching
48 function-enumerator:
56 The label for this LED. If omitted, the label is taken from the node name
58 no other LED class device can be assigned the same label. This property is
59 deprecated - use 'function' and 'color' properties instead.
60 function-enumerator has no effect when this property is present.
62 default-state:
64 The initial state of the LED. If the LED is already on or off and the
65 default-state property is set the to same value, then no glitch should be
66 produced where the LED momentarily turns off (or on). The "keep" setting
67 will keep the LED at whatever its current state is, without producing a
71 - on
72 - off
73 - keep
76 linux,default-trigger:
79 the LED.
83 - enum:
84 # LED will act as a back-light, controlled by the framebuffer system
85 - backlight
86 # LED will turn on (see also "default-state" property)
87 - default-on
88 # LED "double" flashes at a load average based rate
89 - heartbeat
90 # LED indicates disk activity
91 - disk-activity
92 # LED indicates disk read activity
93 - disk-read
94 # LED indicates disk write activity
95 - disk-write
96 # LED flashes at a fixed, configurable rate
97 - timer
98 # LED alters the brightness for the specified duration with one software
99 # timer (requires "led-pattern" property)
100 - pattern
101 # LED indicates mic mute state
102 - audio-micmute
103 # LED indicates audio mute state
104 - audio-mute
105 # LED indicates bluetooth power state
106 - bluetooth-power
107 # LED indicates camera flash state
108 - flash
109 # LED indicated keyboard capslock
110 - kbd-capslock
111 # LED indicates MTD memory activity
112 - mtd
113 # LED indicates NAND memory activity (deprecated),
115 - nand-disk
116 # LED indicates network activity
117 - netdev
118 # No trigger assigned to the LED. This is the default mode
120 - none
121 # LED indicates camera torch state
122 - torch
123 # LED indicates USB gadget activity
124 - usb-gadget
125 # LED indicates USB host activity
126 - usb-host
127 # LED indicates USB port state
128 - usbport
129 # LED is triggered by CPU activity
130 - pattern: "^cpu[0-9]*$"
131 # LED is triggered by Bluetooth activity
132 - pattern: "^hci[0-9]+-power$"
133 # LED is triggered by SD/MMC activity
134 - pattern: "^mmc[0-9]+$"
135 # LED is triggered by WLAN activity
136 - pattern: "^phy[0-9]+tx$"
138 led-pattern:
143 - one-shot : two numbers specifying delay on and delay off (in ms),
144 - timer : two numbers specifying delay on and delay off (in ms),
145 - pattern : the pattern is given by a series of tuples, of
148 Documentation/devicetree/bindings/leds/leds-trigger-pattern.txt
149 $ref: /schemas/types.yaml#/definitions/uint32-matrix
154 led-max-microamp:
156 Maximum LED supply current in microamperes. This property can be made
159 For flash LED controllers with configurable current this property is
160 mandatory for the LEDs in the non-flash modes (e.g. torch or indicator).
162 max-brightness:
166 It could happen that an LED is made so bright that it gets damaged or
169 Note that this flag is mainly used for PWM-LEDs, where it is not possible
171 led-max-microamp.
174 panic-indicator:
176 This property specifies that the LED should be used, if at all possible,
180 retain-state-shutdown:
182 This property specifies that the LED should not be turned off or changed
186 trigger-sources:
188 List of devices which should be used as a source triggering this LED
190 indicate its state. E.g. USB 2.0 LED may react to device(s) in a USB 2.0
193 each of them having its own LED assigned (assuming they are not
197 state of the line (with or without inversion flags) to the LED.
198 In many cases LED can be related to more than one device (e.g. one USB LED
202 #trigger-source-cells property in the source node.
203 $ref: /schemas/types.yaml#/definitions/phandle-array
205 active-low:
208 Makes LED active low. To turn the LED ON, line needs to be
211 inactive-high-impedance:
214 Set LED to high-impedance mode to turn the LED OFF. LED might also
217 # Required properties for flash LED child nodes:
218 flash-max-microamp:
220 Maximum flash LED supply current in microamperes. Required for flash LED
223 flash-max-timeout-us:
225 Maximum timeout in microseconds after which the flash LED is turned off.
226 Required for flash LED nodes with configurable timeout.
231 - |
232 #include <dt-bindings/gpio/gpio.h>
233 #include <dt-bindings/leds/common.h>
235 led-controller {
236 compatible = "gpio-leds";
238 led-0 {
240 linux,default-trigger = "heartbeat";
244 led-1 {
247 trigger-sources = <&ohci_port1>, <&ehci_port1>;
251 - |
252 #include <dt-bindings/leds/common.h>
254 led-controller {
255 compatible = "maxim,max77693-led";
257 led {
260 led-sources = <0>, <1>;
261 led-max-microamp = <50000>;
262 flash-max-microamp = <320000>;
263 flash-max-timeout-us = <500000>;
267 - |
268 #include <dt-bindings/leds/common.h>
271 #address-cells = <1>;
272 #size-cells = <0>;
274 led-controller@30 {
277 #address-cells = <1>;
278 #size-cells = <0>;
280 led@1 {
282 linux,default-trigger = "heartbeat";
284 function-enumerator = <1>;
287 led@2 {
290 function-enumerator = <2>;
293 led@3 {
296 function-enumerator = <3>;