Gitweb: http://git.kernel.org/linus/d680c76eccd9222031ee30dcee5fdedba2467610
Commit: d680c76eccd9222031ee30dcee5fdedba2467610
Parent: 47a72688fae7298e1ad5fdc9bff7e04b6a549620
Author: Francesco VIRLINZI <francesco.virlinzi@st.com>
AuthorDate: Wed Mar 11 07:40:54 2009 +0000
Committer: Paul Mundt <lethal@linux-sh.org>
CommitDate: Wed Mar 11 17:18:46 2009 +0900
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>
---
arch/sh/include/asm/clock.h | 1 +
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 f9c8858..2f6c962 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 7b17137..332a179 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)) {
--
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