2009/7/13 Andy Walls <awalls@xxxxxxxxx>:
> On Mon, 2009-07-13 at 20:17 +0900, Dongsoo, Nathaniel Kim wrote:
>
>
>> Well arranged thanks to you. BTW, can you tell me about
>> "s_crystal_freq" in detail? I can see that ivtv and saa7115 are using
>> that but can't figure out what is exactly for. At the earlier mail, I
>> considered that as a function let subdev device know about the
>> frequency of clock "given" not "made by". Am I right? Please let me
>> know if I'm getting wrong.
>> Cheers,
>
> As I understand it, s_crystal_freq() should be used when a different
> crystal frequency could be used with a chip in differnt board designs.
> For programming PLLs or dividers, the sub_device driver needs to know
> what the crystal or reference frequency is.
>
> Regards,
> Andy
Thank you Andy.
Before knowing s_crystal_freq, I preferred to pass MCLK through
platform data of external camera device. Now, I think I can use
s_crystal_freq to pass the clock to the camera device without using
platform data. cool
Cheers,
Nate
>
>
>
>> Nate
>
>
>
--
=
DongSoo, Nathaniel Kim
Engineer
Mobile S/W Platform Lab.
Digital Media & Communications R&D Centre
Samsung Electronics CO., LTD.
e-mail : dongsoo.kim@xxxxxxxxx
dongsoo45.kim@xxxxxxxxxxx
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