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sh: clkfwk: refactor rate propagation.

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This resyncs the rate propagation strategy with the scheme used by the
OMAP clock framework. Child clocks are tracked on a list under each
parent and propagation happens there specifically rather than constantly
iterating over the global clock list.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2009-05-12 04:27:43 +09:00
parent a02cb230bb
commit b1f6cfe48c
3 changed files with 87 additions and 54 deletions
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9
arch/sh/include/asm/clock.h
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@@ -27,6 +27,9 @@ struct clk {
struct clk *parent;
struct clk_ops *ops;
struct list_head children;
struct list_head sibling; /* node for children */
int usecount;
unsigned long rate;
@@ -35,7 +38,6 @@ struct clk {
};
#define CLK_ALWAYS_ENABLED (1 << 0)
#define CLK_RATE_PROPAGATES (1 << 1)
#define CLK_NEEDS_INIT (1 << 2)
/* Should be defined by processor-specific code */
@@ -44,9 +46,10 @@ int __init arch_clk_init(void);
/* arch/sh/kernel/cpu/clock.c */
int clk_init(void);
unsigned long followparent_recalc(struct clk *clk);
unsigned long followparent_recalc(struct clk *);
void recalculate_root_clocks(void);
void propagate_rate(struct clk *);
void clk_recalc_rate(struct clk *);
int clk_register(struct clk *);
void clk_unregister(struct clk *);