On 12/10/2014 01:20 PM, Sylwester Nawrocki wrote:

Hi,

On 04/12/14 17:12, Pavel Machek wrote:

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+- maxim,boost-mode :

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+	In boost mode the device can produce up to 1.2A of total current
+	on both outputs. The maximum current on each output is reduced
+	to 625mA then. If there are two child led nodes defined then boost
+	is enabled by default.
+	Possible values:
+		MAX77693_LED_BOOST_OFF - no boost,
+		MAX77693_LED_BOOST_ADAPTIVE - adaptive mode,
+		MAX77693_LED_BOOST_FIXED - fixed mode.
+- maxim,boost-vout : Output voltage of the boost module in millivolts.
+- maxim,vsys-min : Low input voltage level in millivolts. Flash is not fired
+	if chip estimates that system voltage could drop below this level due
+	to flash power consumption.
+
+Required properties of the LED child node:
+- label : see Documentation/devicetree/bindings/leds/common.txt
+- maxim,fled_id : Identifier of the fled output the led is connected to;

I'm pretty sure this will be needed for about every chip that can drive
multiple LEDs. Shouldn't it be documented in the generic documentation?

OK.

Well... "fled_id" is not exactly suitable name. On other busses, it
would be "reg = <1>"?

I think we need to clarify what the LED device node subnodes really mean.
I thought initially they describe a physical current output of the LED
controller, but it turns out the subnode corresponds to a LED attached
to the LED controller.  Since a LED can be connected to multiple outputs
of the LED controller I think 'reg' property doesn't make sense here.

Then presumably we should use a property in each subnode, telling which
LED controller outputs a LED is connected to?

For instance, if we assign numbers 0, 1 to FLED1, FLED2 outputs of
MAX77693 and there is just one LED connected to those outputs we would
have something like:

max77693: led {
	compatible = "maxim,max77693-led";	
	...
	led1 {
		maxim,fled-sources = <0 1>;
		...
	};
};

Feel free to propose better name for the property, I guess we need to
avoid "maxim,current-sources" due to ambiguity of the word "current".

For me this sounds reasonable. Moreover we will avoid the need for
address-cells and size-cells properties in the parent node.

Best Regards,
Jacek Anaszewski