Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754027AbaLDKHQ (ORCPT ); Thu, 4 Dec 2014 05:07:16 -0500 Received: from nblzone-211-213.nblnetworks.fi ([83.145.211.213]:47729 "EHLO hillosipuli.retiisi.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753545AbaLDKHL (ORCPT ); Thu, 4 Dec 2014 05:07:11 -0500 Date: Thu, 4 Dec 2014 12:07:07 +0200 From: Sakari Ailus To: Jacek Anaszewski Cc: linux-leds@vger.kernel.org, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, kyungmin.park@samsung.com, b.zolnierkie@samsung.com, pavel@ucw.cz, cooloney@gmail.com, rpurdie@rpsys.net, s.nawrocki@samsung.com, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, Andrzej Hajda , Lee Jones , Chanwoo Choi , devicetree@vger.kernel.org Subject: Re: [PATCH/RFC v9 06/19] DT: Add documentation for the mfd Maxim max77693 Message-ID: <20141204100706.GP14746@valkosipuli.retiisi.org.uk> References: <1417622814-10845-1-git-send-email-j.anaszewski@samsung.com> <1417622814-10845-7-git-send-email-j.anaszewski@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1417622814-10845-7-git-send-email-j.anaszewski@samsung.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 > Signed-off-by: Andrzej Hajda > Acked-by: Kyungmin Park > Cc: Lee Jones > Cc: Chanwoo Choi > Cc: Bryan Wu > Cc: Richard Purdie > Cc: Rob Herring > Cc: Pawel Moll > Cc: Mark Rutland > Cc: Ian Campbell > Cc: Kumar Gala > Cc: > --- > Documentation/devicetree/bindings/mfd/max77693.txt | 89 ++++++++++++++++++++ > 1 file changed, 89 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/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? > +- maxim,trigger-type : Array of trigger types in order: flash, torch. > + Possible trigger types: > + MAX77693_LED_TRIG_TYPE_EDGE - Rising edge of the signal triggers > + the flash/torch, > + MAX77693_LED_TRIG_TYPE_LEVEL - Signal level controls duration of How about: "Strobe pulse length ..."? How long does the torch stay on if you use edge trigger for it? I've always thought the torch enable pin was a practical joke. :-) If you need it this for torch as well, I'd use separate properties for the purpose, i.e. trigger-type-flash and trigger-type-torch. > + the flash/torch. > +- maxim,trigger : Array of flags indicating which trigger can activate given led > + in order: fled1, fled2. > + Possible flag values (can be combined): > + MAX77693_LED_TRIG_FLASHEN - FLASHEN pin of the chip, > + MAX77693_LED_TRIG_TORCHEN - TORCHEN pin of the chip, > + MAX77693_LED_TRIG_SOFTWARE - software via I2C command. Is there a need to prevent strobing using a certain method? Just wondering. > +- 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 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? > + MAX77693_LED_FLED1 - FLED1 output of the device - it has to be > + used also if a single LED is connected to both outputs, > + MAX77693_LED_FLED2 - FLED2 output of the device. > + > +Optional properties of the LED child node: > +- 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-microsec : see Documentation/devicetree/bindings/leds/common.txt > + Range: 62500 - 1000000 > + > Example: > +#include > + > max77693@66 { > compatible = "maxim,max77693"; > reg = <0x66>; > @@ -73,4 +132,34 @@ Example: > pwms = <&pwm 0 40000 0>; > pwm-names = "haptic"; > }; > + > + led { > + compatible = "maxim,max77693-led"; > + maxim,fleds = + MAX77693_LED_FLED_USED>; > + maxim,trigger = + (MAX77693_LED_TRIG_TORCHEN | > + MAX77693_LED_TRIG_SOFTWARE)>; > + maxim,trigger-type = + MAX77693_LED_TRIG_TYPE_LEVEL>; > + maxim,boost-mode = ; > + maxim,boost-vout = <5000>; > + maxim,vsys-min = <2400>; > + > + camera1_flash: led1 { > + maxim,fled_id = ; > + label = "max77693-flash1"; > + max-microamp = <250000>; > + flash-max-microamp = <625000>; > + flash-timeout-microsec = <1000000>; > + }; > + > + camera2_flash: led2 { > + maxim,fled_id = ; > + label = "max77693-flash2"; > + max-microamp = <250000>; > + flash-max-microamp = <500000>; > + flash-timeout-microsec = <1000000>; > + }; > + }; I like how this looks like in general. > }; -- Kind regards, Sakari Ailus e-mail: sakari.ailus@iki.fi XMPP: sailus@retiisi.org.uk -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/