clk: Make clk_get_rate() return 0 on error

Most users of clk_get_rate() actually assume a non zero
return value as a valid rate returned. Returing -EINVAL
might confuse such users, so make it instead return zero
on error.

Besides the return value of clk_get_rate seems to be
'unsigned long'.

Signed-off-by: Rajendra nayak <rnayak@ti.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 9924aec..a24b121 100644 (file)
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -285,7 +285,7 @@ unsigned long __clk_get_rate(struct clk *clk)
        unsigned long ret;
 
        if (!clk) {
-               ret = -EINVAL;
+               ret = 0;
                goto out;
        }
 
@@ -295,7 +295,7 @@ unsigned long __clk_get_rate(struct clk *clk)
                goto out;
 
        if (!clk->parent)
-               ret = -ENODEV;
+               ret = 0;
 
 out:
        return ret;
@@ -560,7 +560,7 @@ EXPORT_SYMBOL_GPL(clk_enable);
  * @clk: the clk whose rate is being returned
  *
  * Simply returns the cached rate of the clk.  Does not query the hardware.  If
- * clk is NULL then returns -EINVAL.
+ * clk is NULL then returns 0.
  */
 unsigned long clk_get_rate(struct clk *clk)
 {