diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/include/asm/clock.h | 1 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/clock.c | 29 |
2 files changed, 30 insertions, 0 deletions
diff --git a/arch/sh/include/asm/clock.h b/arch/sh/include/asm/clock.h index f9c88583d90..2f6c9627bc1 100644 --- a/arch/sh/include/asm/clock.h +++ b/arch/sh/include/asm/clock.h @@ -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); }; diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c index 7b17137536d..332a1798547 100644 --- a/arch/sh/kernel/cpu/clock.c +++ b/arch/sh/kernel/cpu/clock.c @@ -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)) { |