linux-kernel - Re: [PATCH 5/6] mfd: arizona: Update DT binding documentation for mic detection

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Message-ID: <20150920041659.GG3039@x1>
Date:	Sun, 20 Sep 2015 05:16:59 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Cc:	cw00.choi@...sung.com, robh+dt@...nel.org, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, myungjoo.ham@...sung.com,
	sameo@...ux.intel.com, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] mfd: arizona: Update DT binding documentation for
 mic detection

On Wed, 16 Sep 2015, Charles Keepax wrote:

> Add additional bindings to allow configuration of the system specific
> microphone detection settings.
> 
> Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
> ---
>  Documentation/devicetree/bindings/mfd/arizona.txt |   21 +++++++++++++++++++++
>  include/dt-bindings/mfd/arizona.h                 |    5 +++++
>  2 files changed, 26 insertions(+), 0 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/arizona.txt b/Documentation/devicetree/bindings/mfd/arizona.txt
> index a8fee60..b98a11b 100644
> --- a/Documentation/devicetree/bindings/mfd/arizona.txt
> +++ b/Documentation/devicetree/bindings/mfd/arizona.txt
> @@ -73,6 +73,27 @@ Optional properties:
>      If this node is not mentioned or if the value is unknown, then
>      headphone detection mode is set to HPDETL.
>  
> +  - wlf,micd-software-compare : Use a software comparison to determine mic
> +    presence
> +  - wlf,micd-detect-debounce : Additional software microphone detection
> +    debounce specified in milliseconds.
> +  - wlf,micd-pol-gpio : GPIO specifier for the GPIO controlling the headset
> +    polarity if one exists.
> +  - wlf,micd-bias-start-time : Time allowed for MICBIAS to startup prior to
> +    performing microphone detection, specified as per the ARIZONA_MICD_TIME_XXX
> +    defines.
> +  - wlf,micd-rate : Delay between successive microphone detection measurements,
> +    specified as per the ARIZONA_MICD_TIME_XXX defines.
> +  - wlf,micd-dbtime : Microphone detection hardware debounces specified as the
> +    number of measurements to take, valid values being 2 and 4.
> +  - wlf,micd-timeout : Timeout for microphone detection, specified in
> +    milliseconds.
> +  - wlf,micd-force-micbias : Force MICBIAS continuously on during microphone
> +    detection.
> +
> +  - wlf,gpsw : Settings for the general purpose switch, set as one of the
> +    ARIZONA_GPSW_XXX defines.

I either need an Ack from the DT folks, or at least someone who knows
about this stuff.  Mark perhaps.

>    - DCVDD-supply, MICVDD-supply : Power supplies, only need to be specified if
>      they are being externally supplied. As covered in
>      Documentation/devicetree/bindings/regulator/regulator.txt
> diff --git a/include/dt-bindings/mfd/arizona.h b/include/dt-bindings/mfd/arizona.h
> index c40f665..dedf46f 100644
> --- a/include/dt-bindings/mfd/arizona.h
> +++ b/include/dt-bindings/mfd/arizona.h
> @@ -110,4 +110,9 @@
>  #define ARIZONA_ACCDET_MODE_HPM 4
>  #define ARIZONA_ACCDET_MODE_ADC 7
>  
> +#define ARIZONA_GPSW_OPEN           0
> +#define ARIZONA_GPSW_CLOSED         1
> +#define ARIZONA_GPSW_CLAMP_ENABLED  2
> +#define ARIZONA_GPSW_CLAMP_DISABLED 3
> +
>  #endif

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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