From: Dave Stevenson <dave.stevenson@raspberrypi.com>
To: "Ondřej Jirman" <megi@xff.cz>,
"Sakari Ailus" <sakari.ailus@linux.intel.com>,
git@luigi311.com, linux-media@vger.kernel.org,
dave.stevenson@raspberrypi.com, jacopo.mondi@ideasonboard.com,
mchehab@kernel.org, robh@kernel.org,
krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, festevam@gmail.com,
devicetree@vger.kernel.org, imx@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, pavel@ucw.cz,
phone-devel@vger.kernel.org,
"Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>
Subject: Re: [PATCH v5 21/25] dt-bindings: media: imx258: Add binding for powerdown-gpio
Date: Mon, 20 May 2024 14:20:28 +0100 [thread overview]
Message-ID: <CAPY8ntCfQvp9rCt=fqTFKYEOamLZwKmJDv9agxerQtDvsGKB0g@mail.gmail.com> (raw)
In-Reply-To: <q5nbk3qcxsjsqp4mdyx5nlrn4oie6oynunwodm7r2nwtywc2ey@kxsgcatwt5b2>
Hi Ondřej
On Mon, 20 May 2024 at 13:55, Ondřej Jirman <megi@xff.cz> wrote:
>
> On Fri, May 17, 2024 at 08:31:35AM GMT, Sakari Ailus wrote:
> > Hi Luis,
> >
> > On Wed, May 01, 2024 at 09:24:38AM -0600, git@luigi311.com wrote:
> > > From: Ondrej Jirman <megi@xff.cz>
> > >
> > > Add powerdown-gpio binding as it is required for some boards.
> >
> > I thought the conclusion was that this wasn't a property of the sensor? If
> > it needs to be controlled, then this should take place somewhere else than
> > in the sensor driver.
>
> It's a property of the sensor modules. It's just optional on
> some, eg. (pin 8):
>
> https://assets-global.website-files.com/63b65bd4974577341e1fe194/654290d4d0fb173e87f754ed_IMX_258_FF_drawing.png
>
> Where else should it be so that the module is described properly in the
> DT and the powerdown signal can be used as part of powerup/down sequence
> of the sensor?
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.
Dave
[1] https://www.spinics.net/lists/linux-media/msg252519.html
[2] https://www.spinics.net/lists/linux-media/msg252496.html
> regards,
> o.
>
> > >
> > > Signed-off-by: Ondrej Jirman <megi@xff.cz>
> > > Signed-off-by: Luis Garcia <git@luigi311.com>
> > > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> > > Reviewed-by: Pavel Machek <pavel@ucw.cz>
> > > ---
> > > Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml | 4 ++++
> > > 1 file changed, 4 insertions(+)
> > >
> > > diff --git a/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml b/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml
> > > index c978abc0cdb3..33338139e6e8 100644
> > > --- a/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml
> > > +++ b/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml
> > > @@ -36,6 +36,10 @@ properties:
> > > reg:
> > > maxItems: 1
> > >
> > > + powerdown-gpios:
> > > + description:
> > > + Reference to the GPIO connected to the PWDN pin, if any.
> > > +
> > > reset-gpios:
> > > description: |-
> > > Reference to the GPIO connected to the XCLR pin, if any.
> >
> > --
> > Regards,
> >
> > Sakari Ailus
next prev parent reply other threads:[~2024-05-20 13:20 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-01 15:24 [PATCH v5 00/25] imx258 improvement series git
2024-05-01 15:24 ` [PATCH v5 01/25] media: i2c: imx258: Remove unused defines git
2024-05-01 15:24 ` [PATCH v5 02/25] media: i2c: imx258: Make image geometry meet sensor requirements git
2024-05-01 15:24 ` [PATCH v5 03/25] media: i2c: imx258: Disable digital cropping on binned modes git
2024-05-01 15:24 ` [PATCH v5 04/25] media: i2c: imx258: Remove redundant I2C writes git
2024-05-01 15:24 ` [PATCH v5 05/25] media: i2c: imx258: Add regulator control git
2024-05-01 15:24 ` [PATCH v5 06/25] media: i2c: imx258: Make V4L2_CID_VBLANK configurable git
2024-05-01 15:24 ` [PATCH v5 07/25] media: i2c: imx258: Split out common registers from the mode based ones git
2024-05-01 15:24 ` [PATCH v5 08/25] media: i2c: imx258: Add support for 24MHz clock git
2024-05-01 15:24 ` [PATCH v5 09/25] media: i2c: imx258: Add support for running on 2 CSI data lanes git
2024-05-01 15:24 ` [PATCH v5 10/25] media: i2c: imx258: Follow normal V4L2 behaviours for clipping exposure git
2024-05-01 15:24 ` [PATCH v5 11/25] media: i2c: imx258: Add get_selection for pixel array information git
2024-05-01 15:24 ` [PATCH v5 12/25] media: i2c: imx258: Allow configuration of clock lane behaviour git
2024-05-01 15:24 ` [PATCH v5 13/25] media: i2c: imx258: Correct max FRM_LENGTH_LINES value git
2024-05-01 15:24 ` [PATCH v5 14/25] media: i2c: imx258: Issue reset before starting streaming git
2024-05-01 15:24 ` [PATCH v5 15/25] media: i2c: imx258: Set pixel_rate range to the same as the value git
2024-05-01 15:24 ` [PATCH v5 16/25] media: i2c: imx258: Support faster pixel rate on binned modes git
2024-05-01 15:24 ` [PATCH v5 17/25] dt-bindings: media: imx258: Rename to include vendor prefix git
2024-05-01 15:24 ` [PATCH v5 18/25] dt-bindings: media: imx258: Add alternate compatible strings git
2024-05-01 15:24 ` [PATCH v5 19/25] media: i2c: imx258: Change register settings for variants of the sensor git
2024-05-01 15:24 ` [PATCH v5 20/25] media: i2c: imx258: Make HFLIP and VFLIP controls writable git
2024-05-01 15:24 ` [PATCH v5 21/25] dt-bindings: media: imx258: Add binding for powerdown-gpio git
2024-05-17 8:31 ` Sakari Ailus
2024-05-20 12:50 ` Sakari Ailus
2024-06-02 20:20 ` Luis Garcia
2024-05-20 12:55 ` Ondřej Jirman
2024-05-20 13:19 ` Sakari Ailus
2024-05-20 13:20 ` Dave Stevenson [this message]
2024-05-20 19:04 ` Ondřej Jirman
2024-05-01 15:24 ` [PATCH v5 22/25] media: i2c: imx258: Add support for powerdown gpio git
2024-05-01 15:24 ` [PATCH v5 23/25] media: i2c: imx258: Add support for reset gpio git
2024-05-01 15:24 ` [PATCH v5 24/25] media: i2c: imx258: Use v4l2_link_freq_to_bitmap helper git
2024-05-01 15:24 ` [PATCH v5 25/25] media: i2c: imx258: Convert to new CCI register access helpers git
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