Re: [PATCH v2 04/11] DT: Add documentation for the mfd Maxim max77693

Sakari Ailus
2015-03-28T22:55:40Z

On Fri, Mar 27, 2015 at 02:49:38PM +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@samsung.com>
> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
> Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Chanwoo Choi <cw00.choi@samsung.com>
> Cc: Bryan Wu <cooloney@gmail.com>
> Cc: Richard Purdie <rpurdie@rpsys.net>
> ---
> Documentation/devicetree/bindings/mfd/max77693.txt | 61 ++++++++++++++++++++
> 1 file changed, 61 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/Documentation/devicetree/bindings/mfd/max77693.txt
> index 38e6440..15c546ea 100644
> --- a/Documentation/devicetree/bindings/mfd/max77693.txt
> +++ b/Documentation/devicetree/bindings/mfd/max77693.txt
> @@ -76,7 +76,53 @@ 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.
> +- 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.

What are the possible values for this?

Is the datasheet publicly available btw.?

> +- 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.
> +
> +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 +163,20 @@ 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>;
> + };
> };
> };

--
Kind regards,
e-mail: sakari.ailus@iki.fi XMPP: sailus@retiisi.org.uk