linux-kernel - Re: [PATCH 04/24] dt-bindings: leds: Add function and color properties

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Message-ID: <81884969-956c-9d21-4114-4cb10d1e90e3@ti.com>
Date:   Thu, 8 Nov 2018 15:08:02 -0600
From:   Dan Murphy <dmurphy@...com>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>,
        <linux-leds@...r.kernel.org>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <pavel@....cz>, <robh@...nel.org>,
        Baolin Wang <baolin.wang@...aro.org>,
        Daniel Mack <daniel@...que.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Oleh Kravchenko <oleg@....org.ua>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Simon Shields <simon@...eageos.org>,
        Xiaotong Lu <xiaotong.lu@...eadtrum.com>
Subject: Re: [PATCH 04/24] dt-bindings: leds: Add function and color
 properties

Jacek

On 11/08/2018 02:47 PM, Jacek Anaszewski wrote:
> Dan,
> 
> On 11/08/2018 07:00 PM, Dan Murphy wrote:
>> Jacek
>>
>> On 11/06/2018 04:07 PM, Jacek Anaszewski wrote:
>>> Introduce dedicated properties for conveying information about
>>> LED function and color. Mark old "label" property as deprecated.
>>>
>>> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@...il.com>
>>> Cc: Baolin Wang <baolin.wang@...aro.org>
>>> Cc: Daniel Mack <daniel@...que.org>
>>> Cc: Dan Murphy <dmurphy@...com>
>>> Cc: Linus Walleij <linus.walleij@...aro.org>
>>> Cc: Oleh Kravchenko <oleg@....org.ua>
>>> Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>
>>> Cc: Simon Shields <simon@...eageos.org>
>>> Cc: Xiaotong Lu <xiaotong.lu@...eadtrum.com>
>>> ---
>>>  Documentation/devicetree/bindings/leds/common.txt | 52 +++++++++++++++++++----
>>>  1 file changed, 44 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt
>>> index aa13998..3efc826 100644
>>> --- a/Documentation/devicetree/bindings/leds/common.txt
>>> +++ b/Documentation/devicetree/bindings/leds/common.txt
>>> @@ -10,14 +10,20 @@ 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/functions.h.
>>> +	    If there is no matching LED_FUNCTION available, add a new one.
>>> +- color : Color of the LED.
>>
>> Should we define the colors too?  There are only really 4.  Red, green, blue and white.
>>
>> Generally varying colors are created base on the primary colors.  Even the amber color
> 
> No problem, I can add LED colors. However, I don't quite follow how
> the mix of base color strings would give "amber" ? :-)
> 

Amber or yellow.  Red and green with a hint of blue or no blue depending on how dark you want it.

You don't always have to turn the LED on full to mix.  Sometimes lowering the level of the stronger colors like red 
and upping weaker colors like green you can different color

Dan

-- 
------------------
Dan Murphy