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 jz4740_clock_board_data {
  20         unsigned long ext_rate;
  21         unsigned long rtc_rate;
  22 };
  23
  24 extern struct jz4740_clock_board_data jz4740_clock_bdata;
  25
  26 int jz4740_clock_init(void);
  27 void jz4740_clock_suspend(void);
  28 void jz4740_clock_resume(void);
  29
  30 struct clk;
  31
  32 struct clk_ops {
  33         unsigned long (*get_rate)(struct clk* clk);
  34         unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
  35         int (*set_rate)(struct clk* clk, unsigned long rate);
  36         int (*enable)(struct clk* clk);
  37         int (*disable)(struct clk* clk);
  38         int (*is_enabled)(struct clk* clk);
  39
  40         int (*set_parent)(struct clk* clk, struct clk *parent);
  41
  42 };
  43
  44 struct clk {
  45         const char *name;
  46         struct clk* parent;
  47
  48         uint32_t gate_bit;
  49
  50         const struct clk_ops *ops;
  51
  52         struct list_head list;
  53
  54 #ifdef CONFIG_DEBUG_FS
  55         struct dentry *debugfs_entry;
  56         struct dentry *debugfs_parent_entry;
  57 #endif
  58
  59 };
  60
  61 #define JZ4740_CLK_NOT_GATED ((uint32_t)-1)
  62
  63 int clk_is_enabled(struct clk *clk);
  64
  65 #ifdef CONFIG_DEBUG_FS
  66 void jz4740_clock_debugfs_init(void);
  67 void jz4740_clock_debugfs_add_clk(struct clk *clk);
  68 void jz4740_clock_debugfs_update_parent(struct clk *clk);
  69 #else
  70 static inline void jz4740_clock_debugfs_init(void) {};
  71 static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {};
  72 static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {};
  73 #endif
  74
  75 #endif