release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/plat-stmp3xxx/clock.h

   1 /*
   2  * Clock control driver for Freescale STMP37XX/STMP378X - internal header file
   3  *
   4  * Author: Vitaly Wool <vital@embeddedalley.com>
   5  *
   6  * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
   7  * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
   8  */
   9
  10 /*
  11  * The code contained herein is licensed under the GNU General Public
  12  * License. You may obtain a copy of the GNU General Public License
  13  * Version 2 or later at the following locations:
  14  *
  15  * http://www.opensource.org/licenses/gpl-license.html
  16  * http://www.gnu.org/copyleft/gpl.html
  17  */
  18 #ifndef __ARCH_ARM_STMX3XXX_CLOCK_H__
  19 #define __ARCH_ARM_STMX3XXX_CLOCK_H__
  20
  21 #ifndef __ASSEMBLER__
  22
  23 struct clk_ops {
  24         int (*enable) (struct clk *);
  25         int (*disable) (struct clk *);
  26         long (*get_rate) (struct clk *);
  27         long (*round_rate) (struct clk *, u32);
  28         int (*set_rate) (struct clk *, u32);
  29         int (*set_parent) (struct clk *, struct clk *);
  30 };
  31
  32 struct clk {
  33         struct clk *parent;
  34         u32 rate;
  35         u32 flags;
  36         u8 scale_shift;
  37         u8 enable_shift;
  38         u8 bypass_shift;
  39         u8 busy_bit;
  40         s8 usage;
  41         int enable_wait;
  42         int enable_negate;
  43         u32 saved_div;
  44         void __iomem *enable_reg;
  45         void __iomem *scale_reg;
  46         void __iomem *bypass_reg;
  47         void __iomem *busy_reg;
  48         struct clk_ops *ops;
  49 };
  50
  51 #endif /* __ASSEMBLER__ */
  52
  53 /* Flags */
  54 #define RATE_PROPAGATES      (1<<0)
  55 #define NEEDS_INITIALIZATION (1<<1)
  56 #define PARENT_SET_RATE      (1<<2)
  57 #define FIXED_RATE           (1<<3)
  58 #define ENABLED              (1<<4)
  59 #define NEEDS_SET_PARENT     (1<<5)
  60
  61 #endif