4f5ecaa054
This patch updates the clock framework use count code. With this patch the enable() and disable() callbacks only get called when counting from and to zero. While at it the kref stuff gets replaced with an int. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
99 lines
1.9 KiB
C
99 lines
1.9 KiB
C
#ifndef __ASM_SH_CLOCK_H
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#define __ASM_SH_CLOCK_H
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#include <linux/list.h>
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#include <linux/seq_file.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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struct clk;
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struct clk_ops {
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void (*init)(struct clk *clk);
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void (*enable)(struct clk *clk);
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void (*disable)(struct clk *clk);
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void (*recalc)(struct clk *clk);
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int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
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int (*set_parent)(struct clk *clk, struct clk *parent);
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long (*round_rate)(struct clk *clk, unsigned long rate);
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};
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struct clk {
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struct list_head node;
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const char *name;
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int id;
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struct module *owner;
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struct clk *parent;
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struct clk_ops *ops;
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int usecount;
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unsigned long rate;
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unsigned long flags;
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unsigned long arch_flags;
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};
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#define CLK_ALWAYS_ENABLED (1 << 0)
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#define CLK_RATE_PROPAGATES (1 << 1)
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#define CLK_NEEDS_INIT (1 << 2)
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/* Should be defined by processor-specific code */
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void arch_init_clk_ops(struct clk_ops **, int type);
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int __init arch_clk_init(void);
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/* arch/sh/kernel/cpu/clock.c */
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int clk_init(void);
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void clk_recalc_rate(struct clk *);
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int clk_register(struct clk *);
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void clk_unregister(struct clk *);
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static inline int clk_always_enable(const char *id)
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{
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struct clk *clk;
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int ret;
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clk = clk_get(NULL, id);
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if (IS_ERR(clk))
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return PTR_ERR(clk);
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ret = clk_enable(clk);
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if (ret)
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clk_put(clk);
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return ret;
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}
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/* the exported API, in addition to clk_set_rate */
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/**
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* clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
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* @clk: clock source
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* @rate: desired clock rate in Hz
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* @algo_id: algorithm id to be passed down to ops->set_rate
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*
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* Returns success (0) or negative errno.
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*/
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int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
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enum clk_sh_algo_id {
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NO_CHANGE = 0,
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IUS_N1_N1,
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IUS_322,
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IUS_522,
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IUS_N11,
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SB_N1,
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SB3_N1,
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SB3_32,
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SB3_43,
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SB3_54,
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BP_N1,
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IP_N1,
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};
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#endif /* __ASM_SH_CLOCK_H */
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