[Letux-kernel] [PATCH v1 1/6] DT bindings: add bindings for ov965x camera module
H. Nikolaus Schaller
hns at goldelico.com
Fri Jun 23 12:59:24 CEST 2017
> Am 23.06.2017 um 12:46 schrieb Andreas Färber <afaerber at suse.de>:
> 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:
> 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?
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