target/linux/xburst/files-2.6.32/arch/mips/jz4740/clock.h

   1 /*
   2  *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
   3  *      JZ4740 SoC clock support
   4  *
   5  *  This program is free software; you can redistribute  it and/or modify it
   6  *  under  the terms of  the GNU General  Public License as published by the
   7  *  Free Software Foundation;  either version 2 of the  License, or (at your
   8  *  option) any later version.
   9  *
  10  *  You should have received a copy of the  GNU General Public License along
  11  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  12  *  675 Mass Ave, Cambridge, MA 02139, USA.
  13  *
  14  */
  15
  16 #ifndef __JZ4740_CLOCK_H__
  17 #define __JZ4740_CLOCK_H__
  18
  19 struct clk_ops {
  20         unsigned long (*get_rate)(struct clk* clk);
  21         unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
  22         int (*set_rate)(struct clk* clk, unsigned long rate);
  23         int (*enable)(struct clk* clk);
  24         int (*disable)(struct clk* clk);
  25         int (*is_enabled)(struct clk* clk);
  26
  27         int (*set_parent)(struct clk* clk, struct clk *parent);
  28
  29 };
  30
  31 struct clk {
  32         const char *name;
  33         struct clk* parent;
  34
  35         uint32_t gate_bit;
  36
  37         const struct clk_ops *ops;
  38
  39         struct list_head list;
  40
  41 #ifdef CONFIG_DEBUG_FS
  42         struct dentry *debugfs_entry;
  43         struct dentry *debugfs_parent_entry;
  44 #endif
  45
  46 };
  47
  48 #define JZ4740_CLK_NOT_GATED ((uint32_t)-1)
  49
  50 int clk_is_enabled(struct clk *clk);
  51
  52 #ifdef CONFIG_DEBUG_FS
  53 void jz4740_clock_debugfs_init(void);
  54 void jz4740_clock_debugfs_add_clk(struct clk *clk);
  55 void jz4740_clock_debugfs_update_parent(struct clk *clk);
  56 #else
  57 static inline void jz4740_clock_debugfs_init(void) {};
  58 static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {};
  59 static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {};
  60 #endif
  61
  62 #endif