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sh: clkfwk: add clk_set_parent/clk_get_parent 

This patch adds the clk_set_parent/clk_get_parent routines to the sh
clock framework.

Signed-off-by: Francesco Virlinzi <francesco.virlinzi@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Francesco VIRLINZI 2009-03-11 07:40:54 +00:00 committed by Paul Mundt
parent 47a72688fa
commit d680c76ecc
2 changed files with 30 additions and 0 deletions
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1
arch/sh/include/asm/clock.h
View File

@ -15,6 +15,7 @@ struct clk_ops {
void (*disable)(struct clk *clk);
void (*recalc)(struct clk *clk);
int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
int (*set_parent)(struct clk *clk, struct clk *parent);
long (*round_rate)(struct clk *clk, unsigned long rate);
};

29
arch/sh/kernel/cpu/clock.c
View File

@ -239,6 +239,35 @@ void clk_recalc_rate(struct clk *clk)
}
EXPORT_SYMBOL_GPL(clk_recalc_rate);
int clk_set_parent(struct clk *clk, struct clk *parent)
{
int ret = -EINVAL;
struct clk *old;
if (!parent || !clk)
return ret;
old = clk->parent;
if (likely(clk->ops && clk->ops->set_parent)) {
unsigned long flags;
spin_lock_irqsave(&clock_lock, flags);
ret = clk->ops->set_parent(clk, parent);
spin_unlock_irqrestore(&clock_lock, flags);
clk->parent = (ret ? old : parent);
}
if (unlikely(clk->flags & CLK_RATE_PROPAGATES))
propagate_rate(clk);
return ret;
}
EXPORT_SYMBOL_GPL(clk_set_parent);
struct clk *clk_get_parent(struct clk *clk)
{
return clk->parent;
}
EXPORT_SYMBOL_GPL(clk_get_parent);
long clk_round_rate(struct clk *clk, unsigned long rate)
{
if (likely(clk->ops && clk->ops->round_rate)) {