diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clk/clk.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 1566beabda..6f3053727c 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -173,14 +173,15 @@ struct clk *clk_lookup(const char *name) return ERR_PTR(-ENODEV); } -int clk_set_parent(struct clk *clk, struct clk *parent) +int clk_set_parent(struct clk *clk, struct clk *newparent) { - int i; + int i, ret; + struct clk *curparent = clk_get_parent(clk); if (IS_ERR(clk)) return PTR_ERR(clk); - if (IS_ERR(parent)) - return PTR_ERR(parent); + if (IS_ERR(newparent)) + return PTR_ERR(newparent); if (!clk->num_parents) return -EINVAL; @@ -192,14 +193,22 @@ int clk_set_parent(struct clk *clk, struct clk *parent) clk->parents[i] = clk_lookup(clk->parent_names[i]); if (!IS_ERR_OR_NULL(clk->parents[i])) - if (clk->parents[i] == parent) + if (clk->parents[i] == newparent) break; } if (i == clk->num_parents) return -EINVAL; - return clk->ops->set_parent(clk, i); + if (clk->enable_count) + clk_enable(newparent); + + ret = clk->ops->set_parent(clk, i); + + if (clk->enable_count) + clk_disable(curparent); + + return ret; } struct clk *clk_get_parent(struct clk *clk) |