ARM: SAMSUNG: Do not allow get/set/round rate calls with no divider

If the reg_div field is not set, then do not register clk_ops with the
get/set/round rate calls as these will fail to work.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 13 insertions, 2 deletions

diff --git a/arch/arm/plat-samsung/clock-clksrc.c b/arch/arm/plat-samsung/clock-clksrc.c
index 12129f8e509c..aaf7d5ebea96 100644
--- a/arch/arm/plat-samsung/clock-clksrc.c
+++ b/arch/arm/plat-samsung/clock-clksrc.c
@@ -158,14 +158,25 @@ static struct clk_ops clksrc_ops = {
         .round_rate     = s3c_roundrate_clksrc,
 };
 
+static struct clk_ops clksrc_ops_nodiv = {
+        .set_parent     = s3c_setparent_clksrc,
+};
+
 void __init s3c_register_clksrc(struct clksrc_clk *clksrc, int size)
 {
         int ret;
 
+        WARN_ON(!clksrc->reg_div.reg && !clksrc->reg_src.reg);
+
         for (; size > 0; size--, clksrc++) {
                 /* fill in the default functions */
-                if (!clksrc->clk.ops)
-                        clksrc->clk.ops = &clksrc_ops;
+
+                if (!clksrc->clk.ops) {
+                        if (!clksrc->reg_div.reg)
+                                clksrc->clk.ops = &clksrc_ops_nodiv;
+                        else
+                                clksrc->clk.ops = &clksrc_ops;
+                }
 
                 /* setup the clocksource, but do not announce it
                  * as it may be re-set by the setup routines