clk: ux500: clk-sysctrl: handle clocks with no parents

Fix clk_reg_sysctrl() to set main clock registers of new struct
clk_sysctrl even if the registered clock has no parents.

This fixes an issue where "ulpclk" was registered with all clk->reg_*
fields uninitialized, causing a -EINVAL error from clk_prepare().

Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/clk/ux500/clk-sysctrl.c b/drivers/clk/ux500/clk-sysctrl.c
index bc7e9bde792b..e364c9d4aa60 100644
--- a/drivers/clk/ux500/clk-sysctrl.c
+++ b/drivers/clk/ux500/clk-sysctrl.c
@@ -145,7 +145,13 @@ static struct clk *clk_reg_sysctrl(struct device *dev,
                 return ERR_PTR(-ENOMEM);
         }
 
-        for (i = 0; i < num_parents; i++) {
+        /* set main clock registers */
+        clk->reg_sel[0] = reg_sel[0];
+        clk->reg_bits[0] = reg_bits[0];
+        clk->reg_mask[0] = reg_mask[0];
+
+        /* handle clocks with more than one parent */
+        for (i = 1; i < num_parents; i++) {
                 clk->reg_sel[i] = reg_sel[i];
                 clk->reg_bits[i] = reg_bits[i];
                 clk->reg_mask[i] = reg_mask[i];