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Questions about the clk_get () function

Source: Internet
Author: User
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For more information about clk_get () functions-general Linux technology-Linux technology and application, see the following. Clk_get (NULL, "camif ")
What is the role of this function? Do you get the camera clock? What is the clock? Is it the clock of the cameraif interface? Or is the camera clock connected to this interface?
There is also the NULL parameter. Why is it NULL? Can I get another value?


Thanks for your answers. Recently, I have been reading the drivers of the s3c2440 camera and OV9650, which is hard to understand!

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