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ARM: pxa: add clk_set_rate() 

Since there're mulitple clock rates in some device controllers, enable
clk_set_rate() for this usage.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Haojian Zhuang 2011-04-08 20:15:38 +08:00 committed by Eric Miao
parent 4e234cc0ee
commit 52585ccd93
4 changed files with 32 additions and 0 deletions
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15
arch/arm/mach-mmp/clock.c
View File

@ -88,3 +88,18 @@ unsigned long clk_get_rate(struct clk *clk)
return rate;
}
EXPORT_SYMBOL(clk_get_rate);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
unsigned long flags;
int ret = -EINVAL;
if (clk->ops->setrate) {
spin_lock_irqsave(&clocks_lock, flags);
ret = clk->ops->setrate(clk, rate);
spin_unlock_irqrestore(&clocks_lock, flags);
}
return ret;
}
EXPORT_SYMBOL(clk_set_rate);

1
arch/arm/mach-mmp/clock.h
View File

@ -12,6 +12,7 @@ struct clkops {
void (*enable)(struct clk *);
void (*disable)(struct clk *);
unsigned long (*getrate)(struct clk *);
int (*setrate)(struct clk *, unsigned long);
};
struct clk {

15
arch/arm/mach-pxa/clock.c
View File

@ -53,6 +53,21 @@ unsigned long clk_get_rate(struct clk *clk)
}
EXPORT_SYMBOL(clk_get_rate);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
unsigned long flags;
int ret = -EINVAL;
if (clk->ops->setrate) {
spin_lock_irqsave(&clocks_lock, flags);
ret = clk->ops->setrate(clk, rate);
spin_unlock_irqrestore(&clocks_lock, flags);
}
return ret;
}
EXPORT_SYMBOL(clk_set_rate);
void clk_dummy_enable(struct clk *clk)
{
}

1
arch/arm/mach-pxa/clock.h
View File

@ -5,6 +5,7 @@ struct clkops {
void (*enable)(struct clk *);
void (*disable)(struct clk *);
unsigned long (*getrate)(struct clk *);
int (*setrate)(struct clk *, unsigned long);
};
struct clk {