1. 根目录:
2. arch
3. arm
4. mach-u300
5. include
6. mach
7. clkdev.h

#ifndef __MACH_CLKDEV_H
#define __MACH_CLKDEV_H

int __clk_get(struct clk *clk);
void __clk_put(struct clk *clk);

#endif