4ff29ff8e8
There is no real distinction here in behaviour, either a clock needs to be enabled on initialiation or not. The ALWAYS_ENABLED flag was always intended to only apply to clocks that were physically always on and could simply not be disabled at all from software. Unfortunately over time this was abused and the meaning became a bit blurry. So, we kill off both of all of those paths now, as well as the newer NEEDS_INIT flag, and consolidate on a CLK_ENABLE_ON_INIT. Clocks that need to be enabled on initialization can set this, and it will purposely enable them and bump the refcount up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
103 lines
2.0 KiB
C
103 lines
2.0 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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unsigned long (*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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struct list_head children;
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struct list_head sibling; /* node for children */
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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_ENABLE_ON_INIT (1 << 0)
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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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unsigned long followparent_recalc(struct clk *);
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void recalculate_root_clocks(void);
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void propagate_rate(struct clk *);
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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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