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-rw-r--r--drivers/clk/ti/autoidle.c32
-rw-r--r--include/linux/clk/ti.h1
2 files changed, 29 insertions, 4 deletions
diff --git a/drivers/clk/ti/autoidle.c b/drivers/clk/ti/autoidle.c
index a129b4b36ea3..964e97b5478a 100644
--- a/drivers/clk/ti/autoidle.c
+++ b/drivers/clk/ti/autoidle.c
@@ -36,17 +36,41 @@ struct clk_ti_autoidle {
static LIST_HEAD(autoidle_clks);
+/*
+ * we have some non-atomic read/write
+ * operations behind it, so lets
+ * take one lock for handling autoidle
+ * of all clocks
+ */
+static DEFINE_SPINLOCK(autoidle_spinlock);
+
static int _omap2_clk_deny_idle(struct clk_hw_omap *clk)
{
- if (clk->ops && clk->ops->deny_idle)
- clk->ops->deny_idle(clk);
+ if (clk->ops && clk->ops->deny_idle) {
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&autoidle_spinlock, irqflags);
+ clk->autoidle_count++;
+ if (clk->autoidle_count == 1)
+ clk->ops->deny_idle(clk);
+
+ spin_unlock_irqrestore(&autoidle_spinlock, irqflags);
+ }
return 0;
}
static int _omap2_clk_allow_idle(struct clk_hw_omap *clk)
{
- if (clk->ops && clk->ops->allow_idle)
- clk->ops->allow_idle(clk);
+ if (clk->ops && clk->ops->allow_idle) {
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&autoidle_spinlock, irqflags);
+ clk->autoidle_count--;
+ if (clk->autoidle_count == 0)
+ clk->ops->allow_idle(clk);
+
+ spin_unlock_irqrestore(&autoidle_spinlock, irqflags);
+ }
return 0;
}
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index eacc5df57b99..78872efc7be0 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -160,6 +160,7 @@ struct clk_hw_omap {
struct clockdomain *clkdm;
const struct clk_hw_omap_ops *ops;
u32 context;
+ int autoidle_count;
};
/*