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dt-bindings: leds: Add properties for LED name construction

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Introduce dedicated properties for conveying information about
LED function and color. Mark old "label" property as deprecated.

Additionally function-enumerator property is being provided
for the cases when neither function nor color can be used
for LED differentiation.

Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Baolin Wang <baolin.wang@linaro.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: Daniel Mack <daniel@zonque.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Oleh Kravchenko <oleg@kaa.org.ua>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Simon Shields <simon@lineageos.org>
Reviewed-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Jacek Anaszewski 2019-06-09 20:19:04 +02:00
parent 2f430310f7
commit c5d18dd6b6
1 changed files with 54 additions and 8 deletions
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62
Documentation/devicetree/bindings/leds/common.txt
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@ -10,14 +10,30 @@ can influence the way of the LED device initialization, the LED components
have to be tightly coupled with the LED device binding. They are represented
by child nodes of the parent LED device binding.
Optional properties for child nodes:
- led-sources : List of device current outputs the LED is connected to. The
outputs are identified by the numbers that must be defined
in the LED device binding documentation.
- function: LED functon. Use one of the LED_FUNCTION_* prefixed definitions
from the header include/dt-bindings/leds/common.h.
If there is no matching LED_FUNCTION available, add a new one.
- color : Color of the LED. Use one of the LED_COLOR_ID_* prefixed definitions
from the header include/dt-bindings/leds/common.h.
If there is no matching LED_COLOR_ID available, add a new one.
- function-enumerator: Integer to be used when more than one instance
of the same function is needed, differing only with
an ordinal number.
- label : The label for this LED. If omitted, the label is taken from the node
name (excluding the unit address). It has to uniquely identify
a device, i.e. no other LED class device can be assigned the same
label.
label. This property is deprecated - use 'function' and 'color'
properties instead. function-enumerator has no effect when this
property is present.
- default-state : The initial state of the LED. Valid values are "on", "off",
and "keep". If the LED is already on or off and the default-state property is
@ -99,29 +115,59 @@ Required properties for trigger source:
* Examples
gpio-leds {
#include <dt-bindings/leds/common.h>
led-controller@0 {
compatible = "gpio-leds";
system-status {
label = "Status";
led0 {
function = LED_FUNCTION_STATUS;
linux,default-trigger = "heartbeat";
gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
};
usb {
led1 {
function = LED_FUNCTION_USB;
gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
trigger-sources = <&ohci_port1>, <&ehci_port1>;
};
};
max77693-led {
led-controller@0 {
compatible = "maxim,max77693-led";
camera-flash {
label = "Flash";
led {
function = LED_FUNCTION_FLASH;
color = <LED_COLOR_ID_WHITE>;
led-sources = <0>, <1>;
led-max-microamp = <50000>;
flash-max-microamp = <320000>;
flash-max-timeout-us = <500000>;
};
};
led-controller@30 {
compatible = "panasonic,an30259a";
reg = <0x30>;
#address-cells = <1>;
#size-cells = <0>;
led@1 {
reg = <1>;
linux,default-trigger = "heartbeat";
function = LED_FUNCTION_INDICATOR;
function-enumerator = <1>;
};
led@2 {
reg = <2>;
function = LED_FUNCTION_INDICATOR;
function-enumerator = <2>;
};
led@3 {
reg = <3>;
function = LED_FUNCTION_INDICATOR;
function-enumerator = <3>;
};
};