LXR linux/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
  23struct 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
  32struct 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
  62