linux-kernel - Re: [alsa-devel] [PATCH 1/2] mfd: arizona: Add support for INn

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Message-ID: <20140812082811.GB15833@opensource.wolfsonmicro.com>
Date:	Tue, 12 Aug 2014 09:28:11 +0100
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	Inha Song <ideal.song@...sung.com>
Cc:	broonie@...nel.org, mark.rutland@....com,
	devicetree@...r.kernel.org, alsa-devel@...a-project.org,
	sameo@...ux.intel.com, pawel.moll@....com,
	ijc+devicetree@...lion.org.uk, patches@...nsource.wolfsonmicro.com,
	linux-kernel@...r.kernel.org, lgirdwood@...il.com,
	cw00.choi@...sung.com, robh+dt@...nel.org, galak@...eaurora.org,
	lee.jones@...aro.org
Subject: Re: [alsa-devel] [PATCH 1/2] mfd: arizona: Add support for
	INn_MODE register control

On Sat, Aug 09, 2014 at 05:31:38PM +0900, Inha Song wrote:
> Some boards need to set the INn_MODE[1:0] register to change
> the input signal patch. This wlf,inmode property is optional.
> If present values must be specified by the number of
> ARIZONA_MAX_INPUT.
> 
> Example:
>    - wlf,inmode = <2 0 2 0>;	/* IN1, IN3 use DMIC */
> 
> Signed-off-by: Inha Song <ideal.song@...sung.com>
> ---
>  drivers/mfd/arizona-core.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
> index 10a0cb9..4b2eb73 100644
> --- a/drivers/mfd/arizona-core.c
> +++ b/drivers/mfd/arizona-core.c
> @@ -560,6 +560,10 @@ static int arizona_of_get_core_pdata(struct arizona *arizona)
>  			ret);
>  	}
>  
> +	of_property_read_u32_array(arizona->dev->of_node,
> +					 "wlf,inmode",
> +					 arizona->pdata.inmode,
> +					 ARRAY_SIZE(arizona->pdata.inmode));

Might be better to allow the device tree to be shorter than the
array in pdata, should this get expanded on future devices.

Thanks,
Charles
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