Re: [PATCH v3] DT: Add documentation for the mfd Maxim max77693

Mark Rutland
2015-03-30T11:57:29Z

On Mon, Mar 30, 2015 at 10:52:28AM +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-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Signed-off-by: Andrzej Hajda <a.hajda-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Acked-by: Kyungmin Park <kyungmin.park-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Acked-by: Sakari Ailus <sakari.ailus-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> Cc: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> Cc: Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Cc: Bryan Wu <cooloney-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: Richard Purdie <rpurdie-Fm38FmjxZ/leoWH0uzbU5w@public.gmane.org>
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> ---
> Documentation/devicetree/bindings/mfd/max77693.txt | 63 ++++++++++++++++++++
> 1 file changed, 63 insertions(+)
>
> - added range to maxim,boost-mvout and maxim,mvsys-min description
>
> diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/Documentation/devicetree/bindings/mfd/max77693.txt
> index 38e6440..3d2103a 100644
> --- a/Documentation/devicetree/bindings/mfd/max77693.txt
> +++ b/Documentation/devicetree/bindings/mfd/max77693.txt
> @@ -76,7 +76,55 @@ Optional properties:
> Valid values: 4300000, 4700000, 4800000, 4900000
> Default: 4300000
>
> +- 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,trigger-type : Flash trigger type.
> + Possible trigger types:
> + LEDS_TRIG_TYPE_EDGE (0) - Rising edge of the signal triggers
> + the flash,
> + LEDS_TRIG_TYPE_LEVEL (1) - Strobe pulse length controls duration
> + of the flash.

Surely this is required? What should be assumed if this property isn't
present?

Otherwise this looks OK, but I'm not that familiar with LED/flash
bindings.

Mark.

> +- maxim,boost-mode :
> + 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 not enabled explicitly, boost setting defaults to
> + LEDS_BOOST_FIXED in case both current sources are used.
> + Possible values:
> + LEDS_BOOST_OFF (0) - no boost,
> + LEDS_BOOST_ADAPTIVE (1) - adaptive mode,
> + LEDS_BOOST_FIXED (2) - fixed mode.
> +- maxim,boost-mvout : Output voltage of the boost module in millivolts.
> + Range: 3300 - 5500
> +- maxim,mvsys-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.
> + Range: 2400 - 3400
> +
> +Required properties of the LED child node:
> +- led-sources : see Documentation/devicetree/bindings/leds/common.txt;
> + device current output identifiers: 0 - FLED1, 1 - FLED2
> +
> +Optional properties of the LED child node:
> +- label : see Documentation/devicetree/bindings/leds/common.txt
> +- max-microamp : see Documentation/devicetree/bindings/leds/common.txt
> + Range: 15625 - 250000
> +- flash-max-microamp : see Documentation/devicetree/bindings/leds/common.txt
> + Range: 15625 - 1000000
> +- flash-timeout-us : see Documentation/devicetree/bindings/leds/common.txt
> + Range: 62500 - 1000000
> +
> Example:
> +#include <dt-bindings/leds/common.h>
> +
> max77693@66 {
> compatible = "maxim,max77693";
> reg = <0x66>;
> @@ -117,5 +165,20 @@ Example:
> maxim,thermal-regulation-celsius = <75>;
> maxim,battery-overcurrent-microamp = <3000000>;
> maxim,charge-input-threshold-microvolt = <4300000>;
> +
> + led {
> + compatible = "maxim,max77693-led";
> + maxim,trigger-type = <LEDS_TRIG_TYPE_LEVEL>;
> + maxim,boost-mode = <LEDS_BOOST_FIXED>;
> + maxim,boost-mvout = <5000>;
> + maxim,mvsys-min = <2400>;
> +
> + camera_flash: flash-led {
> + label = "max77693-flash";
> + led-sources = <0>, <1>;
> + max-microamp = <500000>;
> + flash-max-microamp = <1250000>;
> + flash-timeout-us = <1000000>;
> + };
> };
> };
> --
> 1.7.9.5
>
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