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* Copyright (C) 2010, Lars-Peter Clausen <>
* JZ4740 SoC clock support
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
#ifndef __MIPS_JZ4740_CLOCK_H__
#define __MIPS_JZ4740_CLOCK_H__
#include <linux/list.h>
struct jz4740_clock_board_data {
unsigned long ext_rate;
unsigned long rtc_rate;
extern struct jz4740_clock_board_data jz4740_clock_bdata;
void jz4740_clock_suspend(void);
void jz4740_clock_resume(void);
struct clk;
struct clk_ops {
unsigned long (*get_rate)(struct clk *clk);
unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
int (*set_rate)(struct clk *clk, unsigned long rate);
int (*enable)(struct clk *clk);
int (*disable)(struct clk *clk);
int (*is_enabled)(struct clk *clk);
int (*set_parent)(struct clk *clk, struct clk *parent);
struct clk {
const char *name;
struct clk *parent;
uint32_t gate_bit;
const struct clk_ops *ops;
struct list_head list;
struct dentry *debugfs_entry;
struct dentry *debugfs_parent_entry;
#define JZ4740_CLK_NOT_GATED ((uint32_t)-1)
int clk_is_enabled(struct clk *clk);
void jz4740_clock_debugfs_init(void);
void jz4740_clock_debugfs_add_clk(struct clk *clk);
void jz4740_clock_debugfs_update_parent(struct clk *clk);
static inline void jz4740_clock_debugfs_init(void) {};
static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {};
static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {};