clk: Return -ENOSYS when system call is not available

Update clk_composite_set_parent() to use -ENOSYS, which is the correct
error code for U-Boot. Also rearrange the code so that the error condition
is clearly indicated and the function runs to the end in the normal case,
since this is the common style in U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sean Anderson <seanga2@gmail.com>

diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index 7e99c5b..bb5351e 100644 (file)
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -37,10 +37,10 @@ static int clk_composite_set_parent(struct clk *clk, struct clk *parent)
        const struct clk_ops *mux_ops = composite->mux_ops;
        struct clk *mux = composite->mux;
 
-       if (mux && mux_ops)
-               return mux_ops->set_parent(mux, parent);
-       else
-               return -ENOTSUPP;
+       if (!mux || !mux_ops)
+               return -ENOSYS;
+
+       return mux_ops->set_parent(mux, parent);
 }
 
 static unsigned long clk_composite_recalc_rate(struct clk *clk)