kernel-ark/include/asm-sh/clock.h
Paul Mundt f6991b0456 sh: Implement clk_round_rate() in the clock framework.
This is an optional component of the clock framework. However,
as we're going to be using this in the cpufreq drivers, add
support for it to the framework.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 13:29:09 +09:00

83 lines
1.6 KiB
C

#ifndef __ASM_SH_CLOCK_H
#define __ASM_SH_CLOCK_H
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/seq_file.h>
#include <linux/clk.h>
struct clk;
struct clk_ops {
void (*init)(struct clk *clk);
void (*enable)(struct clk *clk);
void (*disable)(struct clk *clk);
void (*recalc)(struct clk *clk);
int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
long (*round_rate)(struct clk *clk, unsigned long rate);
};
struct clk {
struct list_head node;
const char *name;
int id;
struct module *owner;
struct clk *parent;
struct clk_ops *ops;
struct kref kref;
unsigned long rate;
unsigned long flags;
};
#define CLK_ALWAYS_ENABLED (1 << 0)
#define CLK_RATE_PROPAGATES (1 << 1)
/* Should be defined by processor-specific code */
void arch_init_clk_ops(struct clk_ops **, int type);
/* arch/sh/kernel/cpu/clock.c */
int clk_init(void);
int __clk_enable(struct clk *);
void __clk_disable(struct clk *);
void clk_recalc_rate(struct clk *);
int clk_register(struct clk *);
void clk_unregister(struct clk *);
/* the exported API, in addition to clk_set_rate */
/**
* clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
* @clk: clock source
* @rate: desired clock rate in Hz
* @algo_id: algorithm id to be passed down to ops->set_rate
*
* Returns success (0) or negative errno.
*/
int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
enum clk_sh_algo_id {
NO_CHANGE = 0,
IUS_N1_N1,
IUS_322,
IUS_522,
IUS_N11,
SB_N1,
SB3_N1,
SB3_32,
SB3_43,
SB3_54,
BP_N1,
IP_N1,
};
#endif /* __ASM_SH_CLOCK_H */