From d680c76eccd9222031ee30dcee5fdedba2467610 Mon Sep 17 00:00:00 2001 From: Francesco VIRLINZI Date: Wed, 11 Mar 2009 07:40:54 +0000 Subject: 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 Signed-off-by: Paul Mundt --- arch/sh/kernel/cpu/clock.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'arch/sh/kernel') 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)) { -- cgit v1.2.3