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List:       linux-kernel
Subject:    Re: [PATCH v5 21/25] dt-bindings: media: imx258: Add binding for powerdown-gpio
From:       Ondřej Jirman <megi () xff ! cz>
Date:       2024-05-20 19:04:58
Message-ID: 6egxnvqjz4z57bwd7jeubikfiew2myjo74hw3x6dimcdm6nuq3 () qnk2tliwfxps
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Hi Dave,

On Mon, May 20, 2024 at 02:20:28PM GMT, Dave Stevenson wrote:
> Hi Ondřej
>
> [...]
> 
> From v3 [1] Luis reported testing dropping the powerdown-gpio on a PPP
> and it working fine.
> 
> I linked to the IMX258 datasheet in the same thread[2], and that
> datasheet does not include such a signal on the imx258 sensor itself.
> 
> If your module has a powerdown gpio, then you'll have to ask the
> module vendor what it is actually connected to. Potentially it relates
> to the VCM driver rather than the sensor.

I've tested it in various ways (inverting the signal, etc.) and it doesn't
seem to do anything. So these patches related to powerdown-gpio can
be dropped.

Kind regards,
	o.

>   Dave
> 
> [1] https://www.spinics.net/lists/linux-media/msg252519.html
> [2] https://www.spinics.net/lists/linux-media/msg252496.html

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