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>
diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c
index 7b17137..332a179 100644
--- a/arch/sh/kernel/cpu/clock.c
+++ b/arch/sh/kernel/cpu/clock.c
@@ -239,6 +239,35 @@
}
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)) {