On Mon, Jun 15, 2015 at 3:10 AM, Jacek Anaszewski
<[email protected]> wrote:
> On 06/15/2015 10:48 AM, Matt Ranostay wrote:
>>
>> On Mon, Jun 15, 2015 at 1:15 AM, Jacek Anaszewski
>> <[email protected]> wrote:
>>>
>>> Hi Matt,
>>>
>>> On 06/13/2015 06:17 AM, Matt Ranostay wrote:
>>>>
>>>>
>>>> Some cap11xx devices have LEDs that can be controlled from userpace
>>>> and via triggers. Document their use and functionality here.
>>>>
>>>> Signed-off-by: Matt Ranostay <[email protected]>
>>>> ---
>>>> .../devicetree/bindings/input/cap11xx.txt | 23
>>>> ++++++++++++++++++++++
>>>> 1 file changed, 23 insertions(+)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/input/cap11xx.txt
>>>> b/Documentation/devicetree/bindings/input/cap11xx.txt
>>>> index 7d0a300..ef89c27 100644
>>>> --- a/Documentation/devicetree/bindings/input/cap11xx.txt
>>>> +++ b/Documentation/devicetree/bindings/input/cap11xx.txt
>>>> @@ -38,6 +38,11 @@ Optional properties:
>>>> defaults. The array must have exactly
>>>> six
>>>> entries.
>>>>
>>>> + linux,led-brightness: Defines the ON brightness when the
>>>> optional LED
>>>> + functionality is used. Valid values are
>>>> 0-15.
>>>> + By default a value of 15 is set.
>>>
>>>
>>>
>>> The ON brightness is controlled with the 'brightness' sysfs property.
>>> The levels start from 1 and 0 turns the LED off. I think that this
>>> property is useless then.
>>>
>>
>> Yes but this defines the brightness for the ON state.. since it can be
>> from 0-100% duty cycle.
>
>
> Doesn't 0 mean that LED is off? If so, then valid values should start
> from 1.
>
Ok makes sense since a 0% duty cycle is useless :)
>
>>>
>>>> +
>>>> Example:
>>>>
>>>> i2c_controller {
>>>> @@ -55,5 +60,23 @@ i2c_controller {
>>>> <105>, /* KEY_LEFT */
>>>> <109>, /* KEY_PAGEDOWN */
>>>> <104>; /* KEY_PAGEUP */
>>>> +
>>>> + linux,led-brightness = <15>;
>>>> +
>>>> + usr@0 {
>>>> + label = "cap11xx:green:usr0";
>>>> + reg = <0>;
>>>> + };
>>>> +
>>>> + usr@1 {
>>>> + label = "cap11xx:green:usr1";
>>>> + reg = <1>;
>>>> + };
>>>> +
>>>> + alive@2 {
>>>> + label = "cap11xx:green:alive";
>>>> + reg = <2>;
>>>> + linux,default_trigger = "heartbeat";
>>>> + };
>>>> };
>>>> }
>>>>
>>>
>>> --
>>> Best Regards,
>>> Jacek Anaszewski
>>
>>
>
>
> --
> Best Regards,
> Jacek Anaszewski
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