arch/arm/plat-tcc/include/mach/clock.h

   1 /*
   2  * Low level clock header file for Telechips TCC architecture
   3  * (C) 2010 Hans J. Koch <hjk@linutronix.de>
   4  *
   5  * Licensed under the GPL v2.
   6  */
   7
   8 #ifndef __ASM_ARCH_TCC_CLOCK_H__
   9 #define __ASM_ARCH_TCC_CLOCK_H__
  10
  11 #ifndef __ASSEMBLY__
  12
  13 struct clk {
  14         struct clk *parent;
  15         /* id number of a root clock, 0 for normal clocks */
  16         int root_id;
  17         /* Reference count of clock enable/disable */
  18         int refcount;
  19         /* Address of associated BCLKCTRx register. Must be set. */
  20         void __iomem *bclkctr;
  21         /* Bit position for BCLKCTRx. Must be set. */
  22         int bclk_shift;
  23         /* Address of ACLKxxx register, if any. */
  24         void __iomem *aclkreg;
  25         /* get the current clock rate (always a fresh value) */
  26         unsigned long (*get_rate) (struct clk *);
  27         /* Function ptr to set the clock to a new rate. The rate must match a
  28            supported rate returned from round_rate. Leave blank if clock is not
  29            programmable */
  30         int (*set_rate) (struct clk *, unsigned long);
  31         /* Function ptr to round the requested clock rate to the nearest
  32            supported rate that is less than or equal to the requested rate. */
  33         unsigned long (*round_rate) (struct clk *, unsigned long);
  34         /* Function ptr to enable the clock. Leave blank if clock can not
  35            be gated. */
  36         int (*enable) (struct clk *);
  37         /* Function ptr to disable the clock. Leave blank if clock can not
  38            be gated. */
  39         void (*disable) (struct clk *);
  40         /* Function ptr to set the parent clock of the clock. */
  41         int (*set_parent) (struct clk *, struct clk *);
  42 };
  43
  44 int clk_register(struct clk *clk);
  45 void clk_unregister(struct clk *clk);
  46
  47 #endif /* __ASSEMBLY__ */
  48 #endif /* __ASM_ARCH_MXC_CLOCK_H__ */