2020-04-06 16:43:39

by Prabhakar Mahadev Lad

[permalink] [raw]
Subject: [PATCH v5 1/5] media: dt-bindings: media: i2c: Deprecate usage of the clock-frequency property

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
internally to 24MHz rather then being passed as dt-property.

Signed-off-by: Lad Prabhakar <[email protected]>
---
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>;
--
2.20.1


2020-04-06 17:46:43

by Laurent Pinchart

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

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/ ?

> internally to 24MHz rather then being passed as dt-property.
>
> Signed-off-by: Lad Prabhakar <[email protected]>

Reviewed-by: Laurent Pinchart <[email protected]>

> ---
> 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

2020-04-07 07:17:02

by Geert Uytterhoeven

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

On Mon, Apr 6, 2020 at 6:43 PM Lad Prabhakar
<[email protected]> 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
> internally to 24MHz rather then being passed as dt-property.
>
> Signed-off-by: Lad Prabhakar <[email protected]>

Reviewed-by: Geert Uytterhoeven <[email protected]>

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

2020-04-07 07:37:22

by Prabhakar

[permalink] [raw]
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
<[email protected]> 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 <[email protected]>
>
> Reviewed-by: Laurent Pinchart <[email protected]>
>
> > ---
> > 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

2020-04-15 21:38:54

by Rob Herring

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

On Mon, 6 Apr 2020 17:42:37 +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
> internally to 24MHz rather then being passed as dt-property.
>
> Signed-off-by: Lad Prabhakar <[email protected]>
> ---
> Documentation/devicetree/bindings/media/i2c/ov5645.txt | 2 --
> 1 file changed, 2 deletions(-)
>

Please add Acked-by/Reviewed-by tags when posting new versions. However,
there's no need to repost patches *only* to add the tags. The upstream
maintainer will do that for acks received on the version they apply.

If a tag was not added on purpose, please state why and what changed.