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Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module

From "H. Nikolaus Schaller" <hns@goldelico.com>
Newsgroups linux.kernel
Subject Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module
Date 2017-06-23 13:10 +0200
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> Am 23.06.2017 um 12:46 schrieb Andreas Färber <afaerber@suse.de>:
> 
> Hi,
> 
> Am 23.06.2017 um 12:25 schrieb H. Nikolaus Schaller:
>>> diff --git a/Documentation/devicetree/bindings/media/i2c/ov965x.txt b/Documentation/devicetree/bindings/media/i2c/ov965x.txt
>>> new file mode 100644
>>> index 0000000..0e0de1f
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/media/i2c/ov965x.txt
>>> @@ -0,0 +1,37 @@
>>> +* Omnivision OV9650/9652/9655 CMOS sensor
>>> +
>>> +The Omnivision OV965x sensor support multiple resolutions output, such as
>>> +CIF, SVGA, UXGA. It also can support YUV422/420, RGB565/555 or raw RGB
>>> +output format.
>>> +
>>> +Required Properties:
>>> +- compatible: should be one of
>>> +	"ovti,ov9650"
>>> +	"ovti,ov9652"
>>> +	"ovti,ov9655"
>>> +- clocks: reference to the mclk input clock.
>> 
>> I wonder why you have removed the clock-frequency property?
>> 
>> In some situations the camera driver must be able to tell the clock source
>> which frequency it wants to see.
> 
> That's what assigned-clock-rates property is for:
> 
> https://www.kernel.org/doc/Documentation/devicetree/bindings/clock/clock-bindings.txt
> 
> AFAIU clock-frequency on devices is deprecated and equivalent to having
> a clocks property pointing to a fixed-clock, which is different from a
> clock with varying rate.

I am not sure if that helps here. The OMAP3-ISP does not have a fixed clock rate
so we can only have the driver define what it wants to see.

And common practise for OMAP3-ISP based camera modules (e.g. N900, N9) is that they do it in the driver.

Maybe ISP developers can comment?

BR,
Nikolaus

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[PATCH v1 0/6] Add support of OV9655 camera Hugues Fruchet <hugues.fruchet@st.com> - 2017-06-22 17:10 +0200
  [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Hugues Fruchet <hugues.fruchet@st.com> - 2017-06-22 17:10 +0200
    Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-23 12:30 +0200
      Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Andreas Färber <afaerber@suse.de> - 2017-06-23 12:50 +0200
        Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-23 13:10 +0200
          Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Laurent Pinchart <laurent.pinchart@ideasonboard.com> - 2017-06-23 14:00 +0200
            Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-23 17:00 +0200
              Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Andreas Färber <afaerber@suse.de> - 2017-06-23 17:00 +0200
                Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-23 17:30 +0200
                Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Suman Anna <s-anna@ti.com> - 2017-06-23 20:10 +0200
                Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-23 21:10 +0200
                Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Suman Anna <s-anna@ti.com> - 2017-06-24 00:30 +0200
                Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-26 08:10 +0200
      Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Hugues FRUCHET <hugues.fruchet@st.com> - 2017-06-26 12:40 +0200
        Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Sylwester Nawrocki <snawrocki@kernel.org> - 2017-06-26 22:10 +0200
          Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-27 07:50 +0200
            Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Sylwester Nawrocki <snawrocki@kernel.org> - 2017-06-28 01:00 +0200
              Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-28 11:20 +0200
                Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera  module Sylwester Nawrocki <s.nawrocki@samsung.com> - 2017-06-28 13:00 +0200
                Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-28 13:30 +0200
                Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Hugues FRUCHET <hugues.fruchet@st.com> - 2017-06-28 14:30 +0200
      Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Rob Herring <robh@kernel.org> - 2017-06-26 21:00 +0200
    Re: [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module Rob Herring <robh@kernel.org> - 2017-06-26 21:00 +0200
  [PATCH v1 2/6] [media] ov9650: add device tree support Hugues Fruchet <hugues.fruchet@st.com> - 2017-06-22 17:10 +0200
    Re: [PATCH v1 2/6] [media] ov9650: add device tree support Sakari Ailus <sakari.ailus@iki.fi> - 2017-06-26 18:40 +0200
      Re: [PATCH v1 2/6] [media] ov9650: add device tree support "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-26 19:50 +0200
        Re: [PATCH v1 2/6] [media] ov9650: add device tree support Sakari Ailus <sakari.ailus@iki.fi> - 2017-06-27 07:40 +0200
          Re: [PATCH v1 2/6] [media] ov9650: add device tree support Hugues FRUCHET <hugues.fruchet@st.com> - 2017-06-27 12:20 +0200
  [PATCH v1 4/6] [media] ov9650: use write_array() for resolution sequences Hugues Fruchet <hugues.fruchet@st.com> - 2017-06-22 17:10 +0200
    Re: [PATCH v1 4/6] [media] ov9650: use write_array() for resolution  sequences Sakari Ailus <sakari.ailus@iki.fi> - 2017-06-26 18:40 +0200
      Re: [PATCH v1 4/6] [media] ov9650: use write_array() for resolution  sequences Hugues FRUCHET <hugues.fruchet@st.com> - 2017-06-29 16:10 +0200
  [PATCH v1 3/6] [media] ov9650: select the nearest higher resolution Hugues Fruchet <hugues.fruchet@st.com> - 2017-06-22 17:10 +0200
  [PATCH v1 6/6] [media] ov9650: add support of OV9655 variant Hugues Fruchet <hugues.fruchet@st.com> - 2017-06-22 17:10 +0200
    Re: [PATCH v1 6/6] [media] ov9650: add support of OV9655 variant kbuild test robot <lkp@intel.com> - 2017-06-25 18:10 +0200
    [PATCH] ov9650: fix semicolon.cocci warnings kbuild test robot <lkp@intel.com> - 2017-06-25 18:10 +0200
    Re: [PATCH v1 6/6] [media] ov9650: add support of OV9655 variant "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-26 08:10 +0200
  Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-22 17:50 +0200
    Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-23 12:30 +0200
      omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655 camera Pavel Machek <pavel@ucw.cz> - 2017-06-25 11:20 +0200
        Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-26 08:10 +0200
          Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655  camera Pavel Machek <pavel@ucw.cz> - 2017-06-26 10:40 +0200
            Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-26 12:00 +0200
              Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655  camera Pavel Machek <pavel@ucw.cz> - 2017-06-26 13:20 +0200
                Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-27 08:00 +0200
            Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655  camera Hugues FRUCHET <hugues.fruchet@st.com> - 2017-06-26 15:30 +0200
              Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655  camera Hugues FRUCHET <hugues.fruchet@st.com> - 2017-06-27 10:00 +0200
                Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-07-01 23:10 +0200
                Re: [PATCH v1 0/6] Add support of OV9655 camera Hugues FRUCHET <hugues.fruchet@st.com> - 2017-07-03 10:20 +0200
                Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-07-03 11:20 +0200
                Re: [PATCH v1 0/6] Add support of OV9655 camera Hugues FRUCHET <hugues.fruchet@st.com> - 2017-07-03 14:10 +0200
                Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-07-03 14:30 +0200
      Re: [PATCH v1 0/6] Add support of OV9655 camera "H. Nikolaus Schaller" <hns@goldelico.com> - 2017-06-26 08:10 +0200
    Re: [PATCH v1 0/6] Add support of OV9655 camera Hugues FRUCHET <hugues.fruchet@st.com> - 2017-06-26 12:10 +0200

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