diff options
| author | Jacek Anaszewski <j.anaszewski@samsung.com> | 2015-04-10 10:36:56 +0200 |
|---|---|---|
| committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2015-08-28 14:05:55 +0200 |
| commit | aa14318aa02f14044acf81f418e1a1cbda29fcfc (patch) | |
| tree | d17ae64ec183141822494449e2b505afa1706b5b /Documentation/devicetree | |
| parent | c13dcf9f2d6f5f06ef1bf79ec456df614c5e058b (diff) | |
DT: leds: Improve description of flash LEDs related properties
1. Since max-microamp property has had no users so far, then rename
it to more descriptive led-max-microamp.
2. Since flash-timeout-us property has had no users so far, then rename
it to more accurate flash-max-timeout-us.
3. Describe led-max-microamp property as mandatory for specific board
configurations.
4. Make flash-max-microamp and flash-max-timeout-us properties mandatory
for devices with configurable flash current and flash timeout settings
respectively.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: devicetree@vger.kernel.org
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/leds/common.txt | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt index 747c53805eec..68419843e32f 100644 --- a/Documentation/devicetree/bindings/leds/common.txt +++ b/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>; }; |