ae891a4264
There are a couple of instances where a clk_enable() can fail, which the SH-Mobile code presently handles, but doesn't get reported all the way back up. This fixes up the return type so the errors make it all the way down to the drivers. Additionally, we now also error out properly if the parent enable fails. Prep work for aggressively turning off unused clocks on boot. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
86 lines
1.8 KiB
C
86 lines
1.8 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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int (*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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/* 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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