Re: [PATCH/RFC v9 06/19] DT: Add documentation for the mfd Maxim max77693

From: Jacek Anaszewski
Date: Wed Dec 10 2014 - 05:02:21 EST

Hi Sakari,

On 12/04/2014 12:40 PM, Jacek Anaszewski wrote:

On 12/04/2014 11:07 AM, Sakari Ailus wrote:
Hi Jacek,

On Wed, Dec 03, 2014 at 05:06:41PM +0100, Jacek Anaszewski wrote:
This patch adds device tree binding documentation for
the flash cell of the Maxim max77693 multifunctional device.

Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Cc: Lee Jones <lee.jones@xxxxxxxxxx>
Cc: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
Cc: Bryan Wu <cooloney@xxxxxxxxx>
Cc: Richard Purdie <rpurdie@xxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
Cc: <devicetree@xxxxxxxxxxxxxxx>
Documentation/devicetree/bindings/mfd/max77693.txt | 89
1 file changed, 89 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt
index 01e9f30..25a6e78 100644
--- a/Documentation/devicetree/bindings/mfd/max77693.txt
+++ b/Documentation/devicetree/bindings/mfd/max77693.txt
@@ -41,7 +41,66 @@ Optional properties:
To get more informations, please refer to documentaion.
[*] refer Documentation/devicetree/bindings/pwm/pwm.txt

+- led : the LED submodule device node
+There are two led outputs available - fled1 and fled2. Each of them can
+control a separate led or they can be connected together to double
+the maximum current for a single connected led. One led is represented
+by one child node.
+Required properties:
+- compatible : Must be "maxim,max77693-led".
+Optional properties:
+- maxim,fleds : Array of current outputs in order: fled1, fled2.
+ Note: both current outputs can be connected to a single led
+ Possible values:
+ MAX77693_LED_FLED_UNUSED - the output is left disconnected,
+ MAX77693_LED_FLED_USED - a diode is connected to the output.

As you have a LED sub-nodes for each LED already, isn't this redundant?

Well, it seems so :)

I agreed here recklessly. This property allows to describe the
situation when one LED is connected to both outputs. Single sub-node
can describe two type of designs: one LED connected to a single
output or one LED connected to both outputs. Therefore additional
property is needed to assess what is the actual case.

Best Regards,
Jacek Anaszewski

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