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Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/clk.c31
1 files changed, 27 insertions, 4 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 6f3053727..93e000c6e 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -141,6 +141,7 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
{
struct clk *parent;
unsigned long parent_rate = 0;
+ int ret;
if (!clk)
return 0;
@@ -148,14 +149,26 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
if (IS_ERR(clk))
return PTR_ERR(clk);
+ if (!clk->ops->set_rate)
+ return -ENOSYS;
+
parent = clk_get_parent(clk);
- if (parent)
+ if (parent) {
parent_rate = clk_get_rate(parent);
- if (clk->ops->set_rate)
- return clk->ops->set_rate(clk, rate, parent_rate);
+ if (clk->flags & CLK_OPS_PARENT_ENABLE) {
+ ret = clk_enable(parent);
+ if (ret)
+ return ret;
+ }
+ }
+
+ ret = clk->ops->set_rate(clk, rate, parent_rate);
+
+ if (parent && clk->flags & CLK_OPS_PARENT_ENABLE)
+ clk_disable(parent);
- return -ENOSYS;
+ return ret;
}
struct clk *clk_lookup(const char *name)
@@ -203,8 +216,18 @@ int clk_set_parent(struct clk *clk, struct clk *newparent)
if (clk->enable_count)
clk_enable(newparent);
+ if (clk->flags & CLK_OPS_PARENT_ENABLE) {
+ clk_enable(curparent);
+ clk_enable(newparent);
+ }
+
ret = clk->ops->set_parent(clk, i);
+ if (clk->flags & CLK_OPS_PARENT_ENABLE) {
+ clk_disable(curparent);
+ clk_disable(newparent);
+ }
+
if (clk->enable_count)
clk_disable(curparent);