linux-kernel - Re: [PATCH v5 1/5] media: dt-bindings: media: i2c: Deprecate usage of the clock-frequency property

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Message-ID: <CA+V-a8sROBQpYvaP8TJ9fGYqOXT+uFsKhjnVBh0hZ2qS7yLQiQ@mail.gmail.com>
Date:   Tue, 7 Apr 2020 08:35:02 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-media <linux-media@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        LAK <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 1/5] media: dt-bindings: media: i2c: Deprecate usage of
 the clock-frequency property

Hi Laurent,

Thank you for the review.

On Mon, Apr 6, 2020 at 6:30 PM Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
>
> Hi Prabhakar,
>
> Thank you for the patch.
>
> On Mon, Apr 06, 2020 at 05:42:37PM +0100, Lad Prabhakar wrote:
> > OV5645 sensor supports input clock frequency ranging from 6MHz to 27MHz
> > but the driver strictly expects this to be 24MHz (with tolerance of 1%)
> > with this restrictions let the driver enforce the clock frequency
>
> Maybe s/with/With/ ?
>
OK will fix it next version.

Cheers,
--Prabhakar

> > internally to 24MHz rather then being passed as dt-property.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>
> > ---
> >  Documentation/devicetree/bindings/media/i2c/ov5645.txt | 2 --
> >  1 file changed, 2 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/media/i2c/ov5645.txt b/Documentation/devicetree/bindings/media/i2c/ov5645.txt
> > index 72ad992f77be..a55bb728ea48 100644
> > --- a/Documentation/devicetree/bindings/media/i2c/ov5645.txt
> > +++ b/Documentation/devicetree/bindings/media/i2c/ov5645.txt
> > @@ -8,7 +8,6 @@ Required Properties:
> >  - compatible: Value should be "ovti,ov5645".
> >  - clocks: Reference to the xclk clock.
> >  - clock-names: Should be "xclk".
> > -- clock-frequency: Frequency of the xclk clock.
> >  - enable-gpios: Chip enable GPIO. Polarity is GPIO_ACTIVE_HIGH. This corresponds
> >    to the hardware pin PWDNB which is physically active low.
> >  - reset-gpios: Chip reset GPIO. Polarity is GPIO_ACTIVE_LOW. This corresponds to
> > @@ -37,7 +36,6 @@ Example:
> >
> >                       clocks = <&clks 200>;
> >                       clock-names = "xclk";
> > -                     clock-frequency = <24000000>;
> >
> >                       vdddo-supply = <&camera_dovdd_1v8>;
> >                       vdda-supply = <&camera_avdd_2v8>;
>
> --
> Regards,
>
> Laurent Pinchart