These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / leds / common.txt

diff --git a/kernel/Documentation/devicetree/bindings/leds/common.txt b/kernel/Documentation/devicetree/bindings/leds/common.txt
index 747c538..6841984 100644 (file)
--- a/kernel/Documentation/devicetree/bindings/leds/common.txt
+++ b/kernel/Documentation/devicetree/bindings/leds/common.txt
@@ -29,14 +29,23 @@ Optional properties for child nodes:
      "ide-disk" - LED indicates disk activity
      "timer" - LED flashes at a fixed, configurable rate
 
-- max-microamp : maximum intensity in microamperes of the LED
-                (torch LED for flash devices)
-- flash-max-microamp : maximum intensity in microamperes of the
-                       flash LED; it is mandatory if the LED should
-                      support the flash mode
-- flash-timeout-us : timeout in microseconds after which the flash
-                     LED is turned off
+- led-max-microamp : Maximum LED supply current in microamperes. This property
+                     can be made mandatory for the board configurations
+                     introducing a risk of hardware damage in case an excessive
+                     current is set.
+                     For flash LED controllers with configurable current this
+                     property is mandatory for the LEDs in the non-flash modes
+                     (e.g. torch or indicator).
 
+Required properties for flash LED child nodes:
+- flash-max-microamp : Maximum flash LED supply current in microamperes.
+- flash-max-timeout-us : Maximum timeout in microseconds after which the flash
+                         LED is turned off.
+
+For controllers that have no configurable current the flash-max-microamp
+property can be omitted.
+For controllers that have no configurable timeout the flash-max-timeout-us
+property can be omitted.
 
 Examples:
 
@@ -49,7 +58,7 @@ system-status {
 camera-flash {
        label = "Flash";
        led-sources = <0>, <1>;
-       max-microamp = <50000>;
+       led-max-microamp = <50000>;
        flash-max-microamp = <320000>;
-       flash-timeout-us = <500000>;
+       flash-max-timeout-us = <500000>;
 };